34.4012.0734.3014534.4022.0834.3025634.4032.0934.303634.4042.1034.3047734.4052.1134.30588334.40642.1234.3069934.40752.1334.307109574993117015634.40862.143117015634.308957499113117015634.40972.153117015634.3091234.41082.1614.02934.3101334.411102.1714.03034.3111434.4122.1814.03134.31234.4132.1914.03234.31334.4142.2014.03334.31434.4152.2114.03434.31534.416314.03534.316428379234.417414.03634.31732615428379203261535746240000123411.0151.0261.0371.044283792823261592.0135746102400002576282652277731125764049212034.25140.008840.015734.25240.00374834.25340.008940.015840.003834.25440.004140.009040.015934.25540.003914.002934.25640.004240.009140.016034.25740.004014.003040.004334.25814.003140.009240.020134.25914.0032040.004440.0202040.009334.26014.003302373294334.26114.003440.004540.0203040.00948493092437753534.26214.00350Montana Operations6561463040.0046750962334.26314.003640.020440.009534.26414.00375040.004740.020540.009634.26514.003834.26614.003940.004840.020640.009734.2679.0434.10134.2016South Dakota 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Submitted40.010634.43234.48234.53271234.43334.48334.53383.140.01073051334.318034.36801434.319034.3690601534.320034.3701634.3211734.37131734.32234.372481834.32334.37351934.32434.374692034.32534.37572134.3261034.37682234.32734.3779112334.32818683975234.378101552153342434.32934.379111234.33034.3801234.3311334.3811334.33234.382141434.33334.3831534.26817187734.269197934.27019.0134.271019.02034.27219.03034.273034.2740034.27534.276521539744634.27734.27834.27934.28034.28134.28234.2838452845114.004014.000440.004914.0041014.0005014.004214.000640.0050014.0007102014.000840.00513014.0009440.00522014.0010514.001140.005361185759145914.001227185759145914.001340.005483114.00142940.00555310440.0056811071201040.005781301190111440.0058012127.147.157.167123848907.17685148784071238489010090405301281401590068514878400133061491113151840.017314.005601834.218040.02079040.017434.21901940.020834.2201040.01754034.2212040.020934.22240.01762134.22340.021040.017734.2242240.0211379583534.2254372209848626640.017834.2262340.021234.22740.01791111.0102434.22840.021301240.018034.22940.024102540.021434.230040.024240.0181034.23126040.021534.23240.024340.0182422734.23340.021640.0244115034.118234.16834.01840.010843691819Montana Operations5353872511.134.119334.16934.01916034.120434.17034.02040.01090185656769034.121534.17134.02117018783243140.011034.122634.17234.02201834.123734.17334.02340.01111234.124834.17434.0241934.125934.17534.02540.011234.1261034.17634.0262040.011334.1271134.17734.0272134.1281234.17834.02840.011434.1291334.17934.0292234.1301434.18034.03040.011534.1311534.18134.0312313.01Allowances Used40.011634.1321634.18234.03213.022434.1331734.18334.03340.011713.03214.00950797869027214.0084034.06814.0096040.0007034.06914.009700034.07014.009840.00080034.0710040.000934.072001034.07320752585855040.0010034234.074300034.075440.00110034.076500516150240.001234.07760034.0787040.0013034.079834.0809040.0014034.08110040.001534.082130134.08314340.001640.005940.012740.006040.0128South Dakota Operations40.006140.012940.006240.013040.006340.013140.006440.013240.006540.013340.006640.013440.006740.013540.006840.013634.5344134.5355666673846234.536725880305634.53766667384637129538334.53884984930926483962127609682036712091446074511447661129538310472155186839752311623711552153346802687456199645159123173125630440.01833.240.021740.018440.021815.0140.018537300000040.021915.0240.018615.034245852840.02201153898440.018740.022118683975240.018840.022235.0011140.018940.022335.002101140.01901240.022435.00340.019113440.022540.019240.02262034.484034.38428034.48534.38522034.48634.3862907948891234.487034.387034.4883034.3886034.48934.3893132034.49034.390034.49134.39132034.49234.3920203034.49333034.3930434.494034.39453404434.49534.395034.496034.39635034.49734.39724034.49834.398034.499034.3991301834.50034.400034.43434.3341634.43534.33540.01181840.001734.43634.3362040.011934.43734.33740.00182134.43834.3382240.012040.001934.43934.3392334.44034.3402440.002034.44134.3412634.44295749934.34240.0021311701562873117015634.443895749934.34316091410431170156293117015640.002217083453934.44434.34434true34.44534.34540.002334.44634.34634.447134.34740.00242234.44834.3483357606340.002534.44934.3494434.45034.350540.00261513161718192021222324262830329944434.28439666714925334.28540.0137362727434.286261240.013834.28736276.0134.28840.013946.0234.2892856.0334.29040.01406.0434.2912940.01416.0534.292306.0634.29340.01426.0734.29475429183186025016.0834.29540.01436.0934.29632240.014436.1034.297334734.29840.014557.0134.2993467.0234.30040.0146940.0069101140.007040.007141689766440.007243134515440.00733440.00742.0040.00752.012.0240.00762.032.0440.007711122.0540.00782.0634.23413.041334.23513.051434.23613.061534.23713.071834.23813.081934.2392034.24040.00812334.24140.00822434.242false2534.24340.008334.24440.008434.24534.24640.008534.24740.016134.24840.008640.0162C00178934.24995749940.008734.2503117015634.1341834.18440.019334.13540.02271934.18540.019434.1362034.1861954756149926740.0228858016834.1372134.187512614540.019534.1382234.18840.022934.1392334.18940.01965.134.14040.02302434.19040.019734.1412534.19140.023134.1422634.19240.019834.1432734.19340.023234.1442834.19440.019934.14540.02332934.19540.020034.1463034.196640.023434.1473134.19734.1483234.19840.023534.1493334.19934.15040.02363434.200634.084734.08540.0027834.086true940.002834.0871034.08840.0029134.089234.09040.003034.09140.003134.09234.09340.003234.09434.09540.003334.09640.003434.09728472912234.09840.003534.099736881520834.10040.0036171622699534.034233534.035024034.03636034.03703734.0380034.0393834.0404634.0413934.0424034.043957499311701563117015634.044957499311701563117015634.04514.00134.04614.00234.047014.003034.04814.004034.049014.00534.050022040.01473440.02450000040.014870840.024600009040.014925.140.02470100825.20140.0150113040.0248012050040.015113040.0249080013040.01520040.0250150000040.015301813568468
Montana
Operations
South Dakota
Operations
Total 930.2
Universal System Benefits Charge 10,017,315.78  10,017,315.78 
Our Portion of Shared Ownership Gen 520,748.77  520,748.77 
Uncollectible Accounts (31,964.87) 51.90  (31,912.97)
10,506,099.68  51.90  10,506,151.58 
Board of Directors Fees 1,673,136.81  306,741.76  1,979,878.57 
Shareholder Expense 204,539.82  26,047.52  230,587.34 
Industry & Association Dues 252,987.03  157,210.31  410,197.34 
Business Development/Community Relations 196,099.78  42,488.46  238,588.24 
Economic Development 54,923.60  125,601.89  180,525.49 
Miscellaneous 22,522.23  17.31  22,539.54 
2,404,209.27  658,107.25  3,062,316.52 
Total Account 930.2 12,910,308.95   658,159.15   13,568,468.10  

Montana Operations Miscellaneous General Expenses account 930.2 includes $63,818 of Electric non-allowed Industry and Association Dues, which is removed for rate making purposes.
40.02510002100040.01543640.02522309.0100028040.015509.0240.02530300009.03040.015632040.02542134.45134.5012234.45234.5027212242334.4536990510334.5031412434.45434.504162534.4552134.505812722302634.45634.5064166004373613154834.45734.5077777915912045808422193234.45834.5081051313731905334.45934.50934.46034.51034.46134.5114616916574818134.462378834.51217.11.0121.0234.46334.51317.234.46434.514334.46534.515428379234.46634.51643261534.467665234.51734.35140.007940.023734.35234.35340.008040.023834.35440.023934.35534.35640.0240134.357234.35834.359334.36034.361434.362534.363428379234.36432615634.3653574624000025762826534.3667227773257640492
C001789 ferc:ElectricUtilityMember LAUREL CITY 100 2021-01-012021-12-31 C001789 Belgrade West (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 Musselshell Wind (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Huron City B (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group NWMT BPA NF Montana OATT KERR BPAT.NWMT 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Holter U3 Turbine Upgrade 2021-01-012021-12-31 C001789 Bozeman Riverside (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, South Dakota, 2020 2020-12-31 C001789 Valier-Williams (GREAT FALLS), Distribution, Unattended 2021-01-012021-12-31 C001789 Grand Total 2021-01-012021-12-31 C001789 ferc:OtherUtilityMember Other (Specify) 2020-12-31 C001789 ferc:LocalTaxMember 2020-12-31 C001789 Morgan Stanley Capital  Group WAPA Pacificorp NF Montana OATT GREATFALLS YTP 2021-01-012021-12-31 C001789 ferc:GenerationStudiesMember 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.26% (South Dakota) 2021-12-31 C001789 ferc:ElectricUtilityMember Madison Unit 4 Turbine Upgrade 2021-12-31 C001789 ferc:UnemploymentTaxMember 2021-01-012021-12-31 C001789 Glacier Electric Coop OLF 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Nebraska, 2020 2021-12-31 C001789 Laurel Auto (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Property Tax, Property Tax, South Dakota, 2020 2020-12-31 C001789 , , , 2021-01-012021-12-31 C001789 SW Wagner (SD), Distribution, Unattended 2021-12-31 C001789 Darby (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 Treasury Stock Activity 2020-01-012020-12-31 C001789 Ennis Auto (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 Tripp Jct. (SD), Transmission, Unattended 2021-12-31 C001789 Guzman Energy, LLC  Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 Shell Energy North America Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 2188, Madison 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group CNTP MATL NF Montana OATT HARDIN MATL.NWMT 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative NWMT WAPA NF Montana OATT TFALLS GREATFALLS 2021-01-012021-12-31 C001789 Ovando Switchyard (MISSOULA), Transmission, Unattended 2021-01-012021-12-31 C001789 Deferred Gas Storage Sales (Montana) - Docket D2001.1.1; Amortization 2001 - 2039 2021-01-012021-12-31 C001789 2021-12-31 C001789 ferc:OtherUtilityMember 2020-01-012020-12-31 C001789 ferc:PenaltyTaxMember 2021-12-31 C001789 PORTLAND GENERAL ELECTRIC COMPANY, LF, Reserve Energy 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT STILLWIND JEFF 2021-01-012021-12-31 C001789 Lone Mountain Big Sky B (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 SOUTH DAKOTA      2021-01-012021-12-31 C001789 Great Falls Southeast (GREAT FALLS), Distribution, Unattended 2021-01-012021-12-31 C001789 Renova Auto (BUTTE), Transmission, Unattended 2021-12-31 C001789 Schroeder (Beethoven Wind) (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group AVISTA Pacificorp NF Montana OATT AVAT.NWMT JEFF 2021-01-012021-12-31 C001789 Excess Deferred Income Taxes (South Dakota) 2021-01-012021-12-31 C001789 Red Lodge Northside (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 Townsend Transmission Sub siteferc:LandAndRightsMember 2021-01-012021-12-31 C001789 Non-Deductible Dues/Lobbying Expense/Penalties/Professional Fees 2021-01-012021-12-31 C001789 Livingston Westside A (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Consumer Counsel, Other Taxes, Montana, 2021 2021-01-012021-12-31 C001789 Aberdeen NE Gas Plant A (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 NorthWestern Energy Solutions 2021-01-012021-12-31 C001789 ferc:SulfurDioxideMember 2021-12-31 C001789 2188, Holter 2021-12-31 C001789 Montana Operations:ferc:LandAndRightsMember 2021-01-012021-12-31 C001789   Pine Creek (TIER II QF), LU, 2021-01-012021-12-31 C001789 Street Light Programferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Brookfield Energy Marketing LP Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 OTHER TOTAL 2021-01-012021-12-31 C001789 Amortization of 2020-01-012020-12-31 C001789 Big Sky Meadow Village (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Avista Corporation , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Yankton Jct. B (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 ferc:FuelTaxMember 2021-12-31 C001789 Heather Grahame 2021-01-012021-12-31 C001789 Pollution Control Revenue Bonds - 2.00% Series, City of Forsyth (Montana) 2021-12-31 C001789 Faulkton 2021-12-31 C001789 2188, Madison 2021-12-31 C001789 ferc:ElectricUtilityMemberferc:OtherLicenseAndFeesTaxMember 2021-01-012021-12-31 C001789 TransAlta Energy Marketing WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-12-31 C001789 ScheduleNuclearFuelMaterialsAbstract 2021-01-012021-12-31 C001789 State Income Tax, State Tax, Montana, 2021 2020-12-31 C001789 Brookfield Energy Marketing LP NWMT Pacificorp NF Montana OATT KERR BRDY 2021-01-012021-12-31 C001789 EELT Tax, Other Taxes, Montana, 2021 2020-12-31 C001789 Mercuria Energy America, LLC Pacificorp WAPA SFP Montana OATT BRDY CROSSOVER 2021-01-012021-12-31 C001789 Canyon Creek (HELENA), Distribution, Unattended 2021-01-012021-12-31 C001789 Exelon Generation Company, LLC , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Billings Exxon (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Whatley (HAVRE), Transmission, Unattended 2021-01-012021-12-31 C001789 MT General Service - 2 2021-01-012021-12-31 C001789 ferc:SeptemberMember Montana Operations 2021-01-012021-12-31 C001789   State of Montana-DNRC / Broadwater Dam (TIER II QF), LU, 2021-01-012021-12-31 C001789 Heavy Highway Tax, Other Taxes, Montana, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Missoula Miller Creek B (MISSOULA), Transmission, Unattended 2021-01-012021-12-31 C001789 Brookfield Energy Marketing LP BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 ferc:AdValoremTaxMember 2020-12-31 C001789 Western Energy Armells Creek (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 First Mortgage Bonds 3.98% (Montana) B 2021-12-31 C001789 Dynasty Power Inc.  BPA Pacificorp NF Montana OATT BPAT.NWMT MLCK 2021-01-012021-12-31 C001789 Avista Corporation AVISTA NWMT NF Montana OATT AVAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Guzman Energy, LLC  AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 Aberdeen Country Club (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:MayMember Montana Operations 2021-01-012021-12-31 C001789 Redfield A (SD), Transmission, Unattended 2021-12-31 C001789 Amortization of 2021-01-012021-12-31 C001789 Helena Golf Course Bank #2 (HELENA), Distribution, Unattended 2021-12-31 C001789 Powerex  Corporation AVISTA BPA NF Montana OATT AVAT.NWMT BPAT.NWMT 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative AVISTA WAPA NF Montana OATT AVAT.NWMT GREATFALLS 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Precipitator (BUTTE), Distribution, Unattended 2021-12-31 C001789 500 kV Operations - Partner's Share (Montana) 2021-12-31 C001789 Dakota Access B (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Pension Requirement (South Dakota) 2020-12-31 C001789 Naturener Power Watch, LLC GLACIER WIND Glacier Wind NF Montana OATT GLWND1 GLWND2 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA SFP Montana OATT CANYONFERRY BPAT.NWMT 2021-01-012021-12-31 C001789 EDF Trading North America, LLC Pacificcorp NWMT NF Montana OATT BRDY COLSTRIP 2021-01-012021-12-31 C001789 ferc:TransmissionStudiesMember SIS Studies 2021-01-012021-12-31 C001789 Anaconda, Billings, Wood H Frame, 1272 KCM ACSR 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp Pacificorp BPA NF Montana OATT YTP BPAT 2021-01-012021-12-31 C001789 Townsend Transmission Sub site 2021-01-012021-12-31 C001789   Black Eagle Solar, LLC (NON TIER II SOLAR QF), LU, 2021-01-012021-12-31 C001789 Puget Sound Energy - Colstrip Units 3&4 Startup (EXCHANGES), EX, RS 190 2021-01-012021-12-31 C001789 Harlem (HAVRE), Transmission, Unattended 2021-01-012021-12-31 C001789 Talen Energy Marketing, LLC NWMT  BPAT LFP Montana OATT GTFALLSNWMT BPAT.NWMT 2021-01-012021-12-31 C001789 Livingston Westside C (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 ferc:SulfurDioxideMemberferc:TwoYearsMember 2021-12-31 C001789 Yankton East Plant A (SD), Transmission, Unattended 2021-12-31 C001789 Dynasty Power Inc.  Pacificorp NWMT NF Montana OATT BRDY MATL.NWMT 2021-01-012021-12-31 C001789 New Market Tax Credit Note Payable 1.146 % 2021-01-012021-12-31 C001789 Dillon-Salmon (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Southwest Power Pool (SD) FNS 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT CANYONFERRY YTP 2021-01-012021-12-31 C001789 Macquarie Energy LLC BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Generating Stations Under Project License 2021-01-012021-12-31 C001789 Increases (Decreases) in Other Paid-In Capital 2021-01-012021-12-31 C001789 Lake 2021-12-31 C001789 Willow Creek (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 John Hines 2021-01-012021-12-31 C001789 GRID FORCE ENERGY MANAGEMENT, LLC, LF, Reserve Energy 2021-01-012021-12-31 C001789   Greenfield Wind, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Portland General Electric Company AVISTA NWMT NF Montana OATT AVAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC NWMT Pacificorp SFP Montana OATT KERR YTP 2021-01-012021-12-31 C001789 Helena Westside A (HELENA), Distribution, Unattended 2021-12-31 C001789 Hamilton South Side (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 Manufactured Gas Plants (South Dakota) - Docket NG 11-003 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Coal Conversion Tax, Other Taxes, North Dakota, 2021 2021-01-012021-12-31 C001789 TransAlta Energy Marketing Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Family Protector Plan Future Payments (South Dakota) 2021-12-31 C001789 Energy Keepers, Inc NWMT AVA SFP Montana OATT COLSTRIP AVAT.NWMT 2021-01-012021-12-31 C001789 Yankton SE (SD), Distribution, Unattended 2021-12-31 C001789 Energy Keepers, Inc Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 First Mortgage Bonds 3.99% (Montana) 2021-12-31 C001789 Reserves & Accruals 2021-01-012021-12-31 C001789 Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization 2021-12-31 C001789 Garnell Pipeline (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 Butte Continental Drive (BUTTE), Distribution, Unattended 2021-01-012021-12-31 C001789 Property Tax - Crow Tribe, Property Tax, Montana, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Colstrip 230 (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Flow-through Income Taxes (Montana) 2021-01-012021-12-31 C001789 Neal Coal 2021-01-012021-12-31 C001789 Deferred Directors' Compensation (South Dakota) 2020-12-31 C001789 Powerex  Corporation Pacificorp Pacificorp NF Montana OATT JEFF YTP 2021-01-012021-12-31 C001789 Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637 2021-01-012021-12-31 C001789 Taft Auto (MISSOULA), Transmission, Unattended 2021-12-31 C001789 Drummond City (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Consumer Counsel, Other Taxes, Montana, 2020 2021-12-31 C001789 EDF Trading North America, LLC Pacificcorp MATL.NWMT NF Montana OATT YTP MATL.NWMT 2021-01-012021-12-31 C001789 Energy Keepers, Inc AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 ferc:OtherFederalTaxMember 2021-12-31 C001789 Big Stone Plant A (SD), Transmission, Unattended 2021-12-31 C001789 California Independent System Operator - EIM Transmission (PURCHASED POWER SUPPLY), SF, CAISO 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND NWMT NF Montana OATT GLWND2 NWMT.SYSTEM 2021-01-012021-12-31 C001789 NorthWestern Services, LLC - Paid in Capital 2020-12-31 C001789 NATURENER GLACIER WIND ENERGY (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 WESTERN AREA POWER ADMINISTATION (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 Dynasty Power Inc.  Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 Gross Receipts Tax, Other Taxes, South Dakota, 2021 2020-12-31 C001789 Morgan Stanley Capital  Group WAPA MATL NF Montana OATT CROSSOVER MATL.NWMT 2021-01-012021-12-31 C001789 ferc:GasUtilityMember 2020-01-012020-12-31 C001789 Shell Energy North America (US), L.P. , SF, Market-Based Rate 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Federal Income Tax, Income Tax, South Dakota/Nebraska, 2021 2021-01-012021-12-31 C001789 Harlowtown A (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Montana, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 EELT Tax, Other Taxes, Montana, 2020 2021-01-012021-12-31 C001789 Butte Montana St B (BUTTE), Distribution, Unattended 2021-01-012021-12-31 C001789 The Energy Authority Pacificorp Pacificorp NF Montana OATT YTP JEFF 2021-01-012021-12-31 C001789 Fairfield Wind (GREAT FALLS), Transmission, Unattended 2021-12-31 C001789 12 others under 10,000 MVA (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Western Area Power Admin WAPA WAPA NF Montana OATT CANYONFERRY GREATFALLS 2021-01-012021-12-31 C001789 ferc:MiscellaneousOtherTaxMember 2021-12-31 C001789 EDF Trading North America, LLC BPA NWMT NF Montana OATT BPAT.NWMT COLSTRIP 2021-01-012021-12-31 C001789 ferc:FederalTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Aberdeen 4th Street (SD), Distribution, Unattended 2021-01-012021-12-31 C001789   Colstrip Energy Ltd/Montana One (TIER II QF), LU, 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA NF Montana OATT HOLTER BPAT.NWMT 2021-01-012021-12-31 C001789 WET Tax, Other Taxes, Montana, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 East Helena Switchyard A (HELENA), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Regulatory Assets 2020-12-31 C001789 Regulatory Assets 2021-01-012021-12-31 C001789 ferc:AugustMember South Dakota Operations 2021-01-012021-12-31 C001789 Townsend (HELENA), Distribution, Unattended 2021-12-31 C001789 FEA Studies 2021-01-012021-12-31 C001789 Manufactured Gas Plants (South Dakota) - Docket NG 11-003 2020-12-31 C001789 Property Tax - Crow Tribe, Property Tax, Montana, 2020 2021-12-31 C001789 EDF Trading North America, LLC AVISTA BPA NF Montana OATT AVAT,NWMT BPAT.NWMT 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Huron Generating Station 2021-01-012021-12-31 C001789 Missoula Miller Creek A (MISSOULA), Transmission, Unattended 2021-01-012021-12-31 C001789 The Energy Authority Pacificorp AVA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 Aspen Air U.S., LLC Talen Energy Aspen Air Corporation FNO Montana OATT Colstrip  Billings, MT 2021-01-012021-12-31 C001789   Musselshell Wind Project 1, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Spion Kop Collector (GREAT FALLS), Transmission, Unattended 2021-01-012021-12-31 C001789 ferc:ElectricOtherFacilitiesMember Other (provide details in footnote): 2021-01-012021-12-31 C001789 PUGET SOUND ENERGY (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 Energy Keepers, Inc AVISTA Pacificorp SFP Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789   Fairfield Wind, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Investment in Equity Securities 2021-01-012021-12-31 C001789 ferc:FranchiseTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Redfield 2021-12-31 C001789 Dynasty Power Inc.  Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 WAPA Broadland (SD), Transmission, Unattended 2021-12-31 C001789 ferc:StateTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Macquarie Energy LLC BPA WAPA SFP Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Portland General Electric Company Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 NorthWestern Services, LLC - Capital Stock 2021-01-012021-12-31 C001789 Butte Montana St B (BUTTE), Distribution, Unattended 2021-12-31 C001789 Broadview Switchyard A (BILLINGS), Transmission, Unattended 2021-12-31 C001789 State Income Tax, State Tax, South Dakota/Nebraska, 2021 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC Pacificorp Pacificorp NF Montana OATT BRDY YTP 2021-01-012021-12-31 C001789 Market Monitoring & Compliance 2021-01-012021-03-31 C001789 Senior Unsecured Revolving Line of Credit ($425m) 2021-01-012021-12-31 C001789 Conrad Auto (GREAT FALLS), Transmission, Unattended 2021-12-31 C001789 Huron City B (SD), Distribution, Unattended 2021-12-31 C001789 Morgan Stanley Capital  Group BPA Pacificorp SFP Montana OATT BPAT.NWMT JEFF 2021-01-012021-12-31 C001789 PacifiCorp NWMT NWMT NF Montana OATT COLSTRIP NWMT.SYSTEM 2021-01-012021-12-31 C001789 AVANGRID, LF, Reserve Energy 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group NWMT Pacificorp NF Montana OATT HARDIN BRDY 2021-01-012021-12-31 C001789 Compensated Absences (Montana) - Docket 97.11.219 2021-01-012021-12-31 C001789 Other Coyote 2021-01-012021-12-31 C001789 Mobile 7 2021-01-012021-12-31 C001789 Bonneville Power Administration BPA NWMT NF Montana OATT BPAT.NWMT  NWMT.SYSTEM 2021-01-012021-12-31 C001789 Montana Public Service Commission (Montana) - Docket 2017.9.78 - Order 7568 2021-12-31 C001789 Rainbow Energy Marketing Corp NWMT Pacificorp NF Montana OATT DAVEGATES YTP 2021-01-012021-12-31 C001789 TransAlta Energy Marketing Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-12-31 C001789 ferc:OperatingReserveSupplementMember 2021-01-012021-12-31 C001789 Less non-NWE 345 kV partial, , , 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC Pacificorp NWMT NF Montana OATT YTP NWMT.SYSTEM 2021-01-012021-12-31 C001789 ferc:OtherElectricUtilityMember 2021-12-31 C001789 ferc:SulfurDioxideMember Purchases/Transfers: 2021-01-012021-12-31 C001789 KEC Fighting Creek (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 ferc:SulfurDioxideMemberferc:CurrentYearMember 2021-12-31 C001789 PacifiCorp Pacificorp NWMT NF Montana OATT YTP NWMT.SYSTEM 2021-01-012021-12-31 C001789 Dynasty Power Inc.  AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group MATL Glacier Wind NF Montana OATT MATL.NWMT GLWND2 2021-01-012021-12-31 C001789 BC HYDRO DISTRIBUTION, LF, Reserve Energy 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative NWMT WAPA NF Montana OATT COLSTRIP GREATFALLS 2021-01-012021-12-31 C001789 Harlowtown B (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Renova Auto (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Billings Rimrock A (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Montana Public Service Commission, Other Taxes, Montana, 2021 2021-01-012021-12-31 C001789 Idaho Power Company NF 2021-01-012021-12-31 C001789 Common Stock (NASDQ) 2021-12-31 C001789 Linda G. Sullivan 2021-01-012021-12-31 C001789 Billings Eastside (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Basin Electric Power Cooperative Pacificorp AVISTA NF Montana OATT BRDY AVAT.NWMT 2021-01-012021-12-31 C001789 Macquarie Energy LLC Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 EDF Trading North America, LLC AVISTA NWMT NF Montana OATT AVAT,NWMT COLSTRIP 2021-01-012021-12-31 C001789 Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637 2021-12-31 C001789 Sheridan City (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Pension Plan Requirement (Montana) 2021-12-31 C001789 Rainbow Energy Marketing Corporation (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Macquarie Energy LLC Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.85% (South Dakota) 2021-12-31 C001789 ScheduleAccumulatedDeferredIncomeTaxesAcceleratedAmortizationPropertyAbstract 2021-01-012021-12-31 C001789 Guzman Energy, LLC  BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Black Hills Power Inc Colstrip Partners Pacificorp NF Montana OATT COLSTRIP YTP 2021-01-012021-12-31 C001789 Bozeman Sourdough (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Shell Energy North America NWMT BPA NF Montana OATT CROOKEDFALLS BPAT.NWMT 2021-01-012021-12-31 C001789 NorthWestern Services, LLC 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMemberferc:TransmissionPlantMember 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Butte Montana St A (BUTTE), Distribution, Unattended 2021-12-31 C001789 Butte Concentrator (BUTTE), Distribution, Unattended 2021-12-31 C001789 Use Tax, Sales And Use Tax, Wyoming, 2021 2021-01-012021-12-31 C001789 Webster NW (SD), Transmission, Unattended 2021-12-31 C001789 Federal Unemplyment Tax, Unemployment Tax, South Dakota, 2020 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND BPA NF Montana OATT GLWND1 BPAT.NWMT 2021-01-012021-12-31 C001789 Colstrip 4 2021-12-31 C001789 Pension Plan Requirement (Montana) 2021-01-012021-12-31 C001789 Personal Property - Auto, Other Taxes, Montana, 2021 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, Montana, 2021 2020-12-31 C001789 Guzman Energy, LLC  Pacificorp AVISTA NF Montana OATT BRDY AVAT.NWMT 2021-01-012021-12-31 C001789 Aberdeen #1 2021-01-012021-12-31 C001789 Faulkton 2021-01-012021-12-31 C001789 Whatley (HAVRE), Transmission, Unattended 2021-12-31 C001789 Morgan Stanley Capital  Group MATL BPA NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-12-31 C001789 Stephen P. Adik 2021-01-012021-12-31 C001789 Canadian Montana Pipeline Corporation - Translation Adjustment 2021-12-31 C001789 NorthWestern Energy Solutions - Equity in Undistributed Earnings 2021-12-31 C001789 Aberdeen B (SD), Transmission, Unattended 2021-12-31 C001789 Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637 2020-12-31 C001789 Heavy Highway Tax, Other Taxes, Montana, 2021 2020-12-31 C001789 Manhattan (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 CTC QF Over/Under Collections (Montana) - Docket 97.7.90 and Docket 2001.1.5; Annual Amortization 2020-12-31 C001789 PacifiCorp Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 SOURDOUGH BANK 2021-01-012021-12-31 C001789 Mitchell Park A (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Dynasty Power Inc.  WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-12-31 C001789 NorthWestern Energy Solutions, Inc. 2021-12-31 C001789 2188, Holter 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group BPA Pacificorp SFP Montana OATT BPAT.NWMT BRDY 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 TransAlta Energy Marketing BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Other 2021-01-012021-12-31 C001789 Fairfield Wind (GREAT FALLS), Transmission, Unattended 2021-01-012021-12-31 C001789 Macquarie Energy LLC WAPA NWMT NF Montana OATT CROSSOVER COLSTRIP 2021-01-012021-12-31 C001789 AVANGRID RENEWABLES, LLC (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Environmental Management System 2021-12-31 C001789 Livingston Northside (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Crystal Lail 2021-01-012021-12-31 C001789 Shell Energy North America WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Dakota Access A (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Conrad Auto (GREAT FALLS), Transmission, Unattended 2021-01-012021-12-31 C001789 Montana PSC Electric & Gas Rate Filings 2021-12-31 C001789 ferc:ElectricUtilityMember Regulatory Asset/Liability 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Nebraska, 2021 2021-01-012021-12-31 C001789 East Helena Switchyard C (HELENA), Transmission, Unattended 2021-12-31 C001789 Morgan Stanley Capital  Group Pacificorp MATL SFP Montana OATT BRDY MATL.NWMT 2021-01-012021-12-31 C001789 Crooked Falls A (GREAT FALLS), Transmission, Unattended 2021-12-31 C001789 Montana Public Service Commission Consumer Counsel Taxes (Montana) - Dockets 2017.9.78 and 2018.10.67 2021-12-31 C001789 Basin Electric Power Cooperative WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-12-31 C001789 RESERVE SHARING TRANSACTIONS:, , 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group AVISTA MATL SFP Montana OATT AVAT.NWMT MATL.NWMT 2021-01-012021-12-31 C001789 ferc:MiscellaneousOtherTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Stevensville Sub (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 CHS (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Huron Frank Avenue (SD), Distribution, Unattended 2021-12-31 C001789 First Mortgage Bonds 3.99% (Montana) 2021-01-012021-12-31 C001789 PUGET SOUND ENERGY, INC, LF, Reserve Energy 2021-01-012021-12-31 C001789 Regulatory Assetsferc:GasUtilityMember 2021-12-31 C001789 Black Hills Power Inc BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Holter Wolf Creek (HELENA), Transmission, Unattended 2021-01-012021-12-31 C001789 Dynasty Power Inc.  WAPA BPA SFP Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Plains (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group AVISTA Glacier Wind NF Montana OATT AVAT.NWMT GLWND1 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember BASE Distribution Mgmt System 2021-12-31 C001789 First Mortgage Bonds 2.66% (South Dakota) 2021-12-31 C001789 AVISTA CORPORATION (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 ferc:TransmissionSubstationMember 2021-12-31 C001789 The Energy Authority Pacificorp BPAT NF Montana OATT BRDY BPAT.NWMT 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Pension/Postretirement Benefits 2021-12-31 C001789 Yankton NW (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Big Sky Meadow Village (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.85% (South Dakota) 2021-01-012021-12-31 C001789 ferc:OtherUtilityOrNonutilityMember Account 255 balance 2021-12-31 C001789 Basin Electric Power Cooperative NWMT Pacificorp NF Montana OATT COLSTRIP YTP 2021-01-012021-12-31 C001789 Brookfield Energy Marketing LP WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Lake Helena (HELENA), Transmission, Unattended 2021-01-012021-12-31 C001789 Clatskanie Peoples Utility District - Electric , SF, Market-Based Rate 2021-01-012021-12-31 C001789 ScheduleUnrecoveredPlantAndRegulatoryStudyCostsAbstract 2021-01-012021-12-31 C001789 Personal Property - Auto, Other Taxes, Montana, 2021 2021-12-31 C001789 REC Silicon Company Morgan Stanley REC Silicon Company FNO Montana OATT Hardin  Butte, MT 2021-01-012021-12-31 C001789 Transmission Line Rights (Montana) 2020-12-31 C001789 The Energy Authority MATL BPA NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-12-31 C001789 EDF Trading North America, LLC  , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Billings Central (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Coal Conversion Tax, Other Taxes, North Dakota, 2021 2021-01-012021-12-31 C001789 Lone to Meadow Reconductor 2021-01-012021-12-31 C001789 Bozeman Jackrabbit Auto (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Canadian Montana Pipeline Corporation 2021-01-012021-12-31 C001789 Colstrip 4 Coal 2021-01-012021-12-31 C001789 Asset Retirement Obligation (South Dakota) 2021-01-012021-12-31 C001789 Hardin City (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:OtherUtilityMember Other (Specify) 2021-12-31 C001789 Big Sky Midway B (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 Waldorf (MISSOULA), Distribution, Unattended 2021-12-31 C001789 Regulatory Assetsferc:GasUtilityMember 2021-01-012021-12-31 C001789 Guzman Energy, LLC  WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 SUPPLY, , 2021-01-012021-12-31 C001789 ferc:DistributionPlantMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Compensation Accruals 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp Pacificorp NWMT SFP Montana OATT BRDY NWMT.SYSTEM 2021-01-012021-12-31 C001789 Western Area Power Administration WAPA Western Area Power Administration FNO Montana OATT Crossover Various NWMT & WAUW 2021-01-012021-12-31 C001789 ferc:OtherUtilityOrNonutilityMember Other - 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WAPA Beartooth Electric Cooperative, Inc. FNO Montana OATT Fort Peck Various in Montana 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-12-31 C001789 Ovando, Great Falls, Wood H Frame, 1272 KCM ACSR 2021-01-012021-12-31 C001789 Stanford Auto B (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Yankton NW (SD), Distribution, Unattended 2021-12-31 C001789 Canadian Montana Pipeline Corporation - Paid in Capital 2020-12-31 C001789 Other Minor Items (9) - some are amortized over various periods  (Montana) 2021-01-012021-12-31 C001789 Idaho Power Company Pacificorp Idaho SFP Montana OATT JEFF PTSN 2021-01-012021-12-31 C001789 Billings Eighth Street (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Dillon, Salmon-Ennis, Wood H Frame, 556.5 MCM ACSR 2021-01-012021-12-31 C001789 Holter (HELENA), Transmission, Unattended 2021-12-31 C001789 ferc:RealEstateTaxMember 2020-12-31 C001789 Portland General Electric Company AVISTA AVISTA NF Montana OATT COLSTRIP AVAT.NWMT 2021-01-012021-12-31 C001789 ferc:FranchiseTaxMember 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Huron Generating Station 2021-12-31 C001789 ferc:GasUtilityMember Compensation Accruals 2021-12-31 C001789 Yellowstone Park 2021-01-012021-12-31 C001789 The Energy Authority, Inc. (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group BPA WAPA NF Montana OATT BPAT.NWMT GREATFALLS 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp SFP Montana OATT BGI JEFF 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.30% (Montana) 2021-01-012021-12-31 C001789 Deferred Fuel for Electric Generation (South Dakota) 2021-12-31 C001789 Loweth Auto (HELENA), Transmission, Unattended 2021-12-31 C001789 Highmore Plant B (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.85% (Montana) 2021-01-012021-12-31 C001789 Montana Public Service Commission Consumer Counsel Taxes (Montana) - Dockets 2017.9.78 and 2018.10.67 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group Pacificorp BPA NF Montana OATT BRDY BPAT.NWMT 2021-01-012021-12-31 C001789 Ash Grove (HELENA), Distribution, Unattended 2021-12-31 C001789 Federal Income Tax, Income Tax, Montana, 2021 2020-12-31 C001789 Property Tax, Property Tax, Montana, 2021 2021-01-012021-12-31 C001789 Atlas Power, LLC Tenaska Atlas Power, LLC FNO Montana OATT BPAT.NWMT Butte, MT 2021-01-012021-12-31 C001789 Southwester Power Pool (MT) FNS 2021-01-012021-12-31 C001789 Colstrip 500 (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789   Musselshell Wind Project 2, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 2188, Ryan 2021-12-31 C001789 Townsend (HELENA), Distribution, Unattended 2021-01-012021-12-31 C001789 Billings Eastside (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 FAS 106 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-01-012021-12-31 C001789 Talen Energy Marketing, LLC (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC Pacificorp AVISTA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember FICA and Medicare, Federal Tax, Montana, 2021 2021-01-012021-12-31 C001789 Bonneville Power Administration , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Energy Stored in Out of State Utilities (Montana) 2021-12-31 C001789 EDF Trading North America, LLC NWMT AVISTA NF Montana OATT COLSTRIP AVAT.NWMT 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp SFP Montana OATT TFALLS JEFF 2021-01-012021-12-31 C001789 Redfield B (SD), Transmission, Unattended 2021-12-31 C001789 Uniper Global Commodities North America LLC Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Macquarie Energy LLC Pacificorp AVISTA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 Hydro Invasive Species Tax, Other Taxes, Montana, 2021 2021-12-31 C001789 Billings King Avenue (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 Bradley Creek (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 Havre City (HAVRE), Distribution, Unattended 2021-12-31 C001789 Baseline (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 ferc:EnergyImbalanceMember 2021-01-012021-12-31 C001789 Avista Corporation AVISTA AVISTA SFP Montana OATT COLSTRIP AVAT.NMWT 2021-01-012021-12-31 C001789 South Huntley (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 FICA and Medicare, Federal Tax, South Dakota, 2021 2021-12-31 C001789 State Unemployment Tax, Unemployment Tax, Montana, 2020 2021-01-012021-12-31 C001789 ferc:OperatingUtilityMember 2021-12-31 C001789 Clark Jct. (SD), Transmission, Unattended 2021-12-31 C001789 Risk Partners Assurance, Ltd. 2021-01-012021-12-31 C001789 Boulder Auto (HELENA), Transmission, Unattended 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corporation , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Holter Unit 3 Generator Rewindferc:ElectricUtilityMember 2021-12-31 C001789 ferc:ElectricUtilityMember Regulatory Assets 2021-01-012021-12-31 C001789 Mobile B 2021-12-31 C001789 TransAlta Energy Marketing Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 Deer Lodge City (BUTTE), Distribution, Unattended 2021-12-31 C001789 Macquarie Energy LLC Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 Excess Deferred Income Taxes 2020-12-31 C001789 South Butte 161-100sferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Great Falls Riverview (GREAT FALLS), Distribution, Unattended 2021-01-012021-12-31 C001789 Heavy Highway Tax, Other Taxes, Montana, 2021 2021-12-31 C001789 Bonneville Power Admin OLF 2021-01-012021-12-31 C001789 Idaho Power Company AVISTA Pacificorp NF Montana OATT AVAT.NWMT JEFF 2021-01-012021-12-31 C001789 Magris Talc USA, Inc. Energy Keepers Inc. Imerys Talc America, Inc. FNO Montana OATT Kerr Three Forks, MT 2021-01-012021-12-31 C001789 Missoula Hillview Heights (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 Reserves and Accrualsferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Thompson Falls Generation (MISSOULA), Transmission, Unattended 2021-12-31 C001789 Basin Electric Power Cooperative Pacificorp WAPA NF Montana OATT BRDY GREATFALLS 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group MATL Pacificorp SFP Montana OATT MATL.NWMT JEFF 2021-01-012021-12-31 C001789 (Less) (449.1) Provision for Rate Refunds 2020-01-012020-12-31 C001789 BASE Distribution Mgmt System 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA SFP Montana OATT TFALLS BPAT.NWMT 2021-01-012021-12-31 C001789 Mitchell Jr. High B (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Asset Retirement Obligation (Montana) 2020-12-31 C001789 Dynasty Power Inc.  WAPA AVISTA SFP Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-12-31 C001789 Missoula Industrial Sub (MISSOULA), Distribution, Unattended 2021-12-31 C001789 Mitchell S. 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Montana Resources FNO Montana OATT Colstrip & Kerr Butte, MT 2021-01-012021-12-31 C001789 Ohlman Substation (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization 2021-01-012021-12-31 C001789 Minor Projects (Less than $1,000,000 - 149 items) 2021-01-012021-12-31 C001789 Butte Continental Drive (BUTTE), Distribution, Unattended 2021-12-31 C001789 Guzman Energy, LLC  Pacificorp AVISTA SFP Montana OATT BRDY AVAT.NWMT 2021-01-012021-12-31 C001789 Dana J. Dykhouse 2021-01-012021-12-31 C001789 Aberdeen SE A (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:OtherTaxMember 2021-12-31 C001789 Billings Steam Plant Switchyard A (BILLINGS), Distribution, Unattended 2021-12-31 C001789 20211112-5384, 44512, ER22-407-000 2021-01-012021-12-31 C001789 Others Under 10,000 KVA (MT), Transmission, Unattended 2021-12-31 C001789 Environmental Management System 2021-01-012021-12-31 C001789 Other Minor Items (9) - some are amortized over various periods  (Montana) 2020-12-31 C001789 Bridger City (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Risk Partners Assurance, Ltd. - Capital Stock 2020-12-31 C001789 Lincoln Energy Services (SOUTH DAKOTA PURCHASES), OS, 29 2021-01-012021-12-31 C001789 ferc:OtherGasUtilityMember 2020-12-31 C001789 SD 73 Small Qual Facil Rider, 38 P to P 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative Basin Electric & WAPA Basin Electric Power Cooperative FNO Montana OATT Crossover  Various NWMT & WAUW 2021-01-012021-12-31 C001789 Helena Golf Course Bank #1 (HELENA), Distribution, Unattended 2021-01-012021-12-31 C001789 Montana Public Service Commission, Other Taxes, Montana, 2021 2021-12-31 C001789 Property Tax, Property Tax, Iowa, 2021 2020-12-31 C001789 The Energy Authority WAPA Pacificorp SFP Montana OATT CROSSOVER BRDY 2021-01-012021-12-31 C001789 Pension Plan (South Dakota) 2021-01-012021-12-31 C001789 ferc:AdValoremTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Canadian Montana Pipeline Corporation - Equity in Undistributed Earnings 2021-12-31 C001789 Highmore Plant A (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 ferc:SchedulingSystemControlAndDispatchMember 2021-01-012021-12-31 C001789 EDF Trading North America, LLC AVISTA NWMT NF Montana OATT AVAT,NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 State Income Tax, State Tax, South Dakota/Nebraska, 2021 2020-12-31 C001789 ferc:OtherUtilityMember 2020-12-31 C001789 Investment in Equity Securities 2020-01-012020-12-31 C001789 Morgan Stanley Capital  Group MATL Pacificorp NF Montana OATT MATL.NWMT BRDY 2021-01-012021-12-31 C001789 2188, Black Eagle 2021-12-31 C001789 Administration Fee, Havre Pipeline Company, LLC 2021-01-012021-12-31 C001789 Broadview, Townsend B, St. Tower, 795 KCM ACSR 2021-01-012021-12-31 C001789 Hauser Unit 5 Turbine Upgrade 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC WAPA BPA SFP Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Net Tax Greater Than Book Depreciation 2021-01-012021-12-31 C001789 Havre Pipeline Company - Equity in Undistributed Earnings 2021-12-31 C001789 Morgan Stanley Capital  Group Colstrip Partners MATL NF Montana OATT SOUTHPEAK MATL.NWMT 2021-01-012021-12-31 C001789 BPA Residential Exchange Program (Montana) - Docket 2018.8.49 Order 7630; Annual Amortization 2021-01-012021-12-31 C001789 Turnbull (GREAT FALLS), Distribution, Unattended 2021-01-012021-12-31 C001789 Platte B (SD), Distribution, Unattended 2021-12-31 C001789 Bozeman Southside (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Painted Robe (BILLINGS), Transmission, Unattended 2021-12-31 C001789 ferc:OtherAncillaryServicesMember 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group MATL WAPA NF Montana OATT MATL.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Yankton 2021-01-012021-12-31 C001789 The Energy Authority NWMT Pacificorp NF Montana OATT NWMTIMBALANC BPAT.NWMT 2021-01-012021-12-31 C001789 ferc:MayMember South Dakota Operations 2021-01-012021-12-31 C001789 Powerex  Corporation BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 TransAlta Energy Marketing (US), Inc. (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Guzman Energy, LLC  Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 Mill Creek B (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Havre Pipeline Company, LLC 2021-12-31 C001789 Highwood Switchyard (GREAT FALLS), Transmission, Unattended 2021-12-31 C001789 PacifiCorp Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Three Forks South (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Billings Conoco (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Aberdeen Siebrecht D (SD), Transmission, Unattended 2021-12-31 C001789 Delaware Franchise Tax, Franchise Tax, Montana, 2021 2021-01-012021-12-31 C001789 Hamilton South Side (MISSOULA), Distribution, Unattended 2021-12-31 C001789 Reserves and Accrualsferc:ElectricUtilityMember 2020-12-31 C001789 Harlem (HAVRE), Transmission, Unattended 2021-12-31 C001789 Dynasty Power Inc.  Pacificorp BPA NF Montana OATT BRDY BPAT.NWMT 2021-01-012021-12-31 C001789 Yankton East B (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Billings Exxon (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:OperatingUtilityMember 2020-12-31 C001789 ferc:AfterThreeYearsMemberferc:SulfurDioxideMember 2020-12-31 C001789 Lone to Meadow Reconductorferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 ferc:FederalInsuranceTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Billings Wicks Lane (BILLINGS), Distribution, Unattended 2021-12-31 C001789 MAG Energy Solutions BPAT WAPA NF Montana OATT BPAT.NWM T CROSSOVER 2021-01-012021-12-31 C001789 Board of Directors 2021-01-012021-12-31 C001789 Permanent Uncertain Tax Positions (Corporate) 2021-01-012021-12-31 C001789 AVISTA Corporation - Colstrip Loss/Startup (EXCHANGES), EX, RS 190 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-12-31 C001789 Darby (MISSOULA), Distribution, Unattended 2021-12-31 C001789 Gross Receipts Tax, Other Taxes, South Dakota, 2021 2021-12-31 C001789 Unbilled Revenue 2021-01-012021-12-31 C001789 Columbus-Rajelje Auto (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Expenses of Non-Utility Operations (Account 417) 2021-01-012021-12-31 C001789 Federal Income Tax, Income Tax, Montana, 2021 2021-12-31 C001789 Rainbow Energy Marketing Corp WAPA AVISTA NF Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-12-31 C001789 First Mortgage Bonds 2.66% (South Dakota) 2021-01-012021-12-31 C001789 EDF Trading North America, LLC NWMT Pacificorp NF Montana OATT COLSTRIP BRDY 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 The Energy Authority Pacificorp BPAT NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Other 2020-01-012020-12-31 C001789 Great Falls Northwest (GREAT FALLS), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:MarchMember South Dakota Operations 2021-01-012021-12-31 C001789 ferc:LandAndRightsMember Billings Hawthorn Park Sub site 2021-01-012021-12-31 C001789 Mobile 4 2021-12-31 C001789 Malta Auto (HAVRE), Transmission, Unattended 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Macquarie Energy LLC AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 Excess Tax Depreciationferc:ElectricUtilityMember 2021-12-31 C001789 Total South Dakota 2021-01-012021-12-31 C001789 ferc:GasUtilityMember Excess Tax Depreciation 2021-12-31 C001789 2188, Cochrane 2021-01-012021-12-31 C001789 Big Stone Coal 2021-01-012021-12-31 C001789 Line of Credit (Repayments) Borrowings, Net 2021-01-012021-12-31 C001789 MAG Energy Solutions Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 FERC Order No. 472 2021-01-012021-12-31 C001789 Helena Westside B (HELENA), Distribution, Unattended 2021-12-31 C001789 Julia L. 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Energy Keepers inc. Barretts Minerals, Inc. FNO Montana OATT Kerr Dillon, MT 2021-01-012021-12-31 C001789 Willow Creek Gathering, LLC 2021-12-31 C001789 Aberdeen #2 2021-12-31 C001789 Line Creek to Red Lodgeferc:ElectricUtilityMember 2021-12-31 C001789 Menno Jct. 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Yingling 2021-01-012021-12-31 C001789 All 69 kV, , Various, 2021-01-012021-12-31 C001789 2020-01-012020-12-31 C001789 Day Ahead & Real Time Admin 2021-01-012021-03-31 C001789 Mobile B 2021-01-012021-12-31 C001789 Mahvash Yazdi 2021-01-012021-12-31 C001789 Federal Income Tax, Income Tax, South Dakota/Nebraska, 2021 2021-01-012021-12-31 C001789 Federal Unemplyment Tax, Unemployment Tax, Montana, 2021 2020-12-31 C001789 Morgan Stanley Capital  Group MATL Pacificorp NF Montana OATT MATL.NWMT JEFF 2021-01-012021-12-31 C001789 Great Falls Eastside (GREAT FALLS), Distribution, Unattended 2021-12-31 C001789 Capital Power Energy Marketing, Inc. WAPA NWMT NF Montana OATT CROSSOVER NWMT.SYSTEM 2021-01-012021-12-31 C001789   Hanover Hydro Project (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Avista Corporation NWMT NWMT NF Montana OATT COLSTRIP COLSTRIP 2021-01-012021-12-31 C001789 Billings Capacity Planningferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND BPA NF Montana OATT GLWND2 BPAT.NWMT 2021-01-012021-12-31 C001789 Line Creek to Red Lodge 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.03% (Montana) 2021-12-31 C001789 East Helena Switchyard C (HELENA), Transmission, Unattended 2021-01-012021-12-31 C001789 Eugene Water & Electric Board , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Aberdeen NE Gas Plant B (SD), Distribution, Unattended 2021-12-31 C001789 Three Rivers A (BOZEMAN), Transmission, Unattended 2021-12-31 C001789 Pacificorp , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Portland General Electric Company Colstrip Partners Pacificorp SFP Montana OATT COLSTRIP BRDY 2021-01-012021-12-31 C001789 State Income Tax, State Tax, Montana, 2021 2021-12-31 C001789 Bonneville Power Administration (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp SFP Montana OATT COLSTRIP JEFF 2021-01-012021-12-31 C001789 MT Unbilled Revenue 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA NF Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-12-31 C001789 Minor Item (Corporate) 2021-01-012021-12-31 C001789 Minor Projects (Less than $1,000,000 - 293 items) 2021-01-012021-12-31 C001789 ferc:OtherUtility2Member 2021-12-31 C001789 Unbilled Revenues (South Dakota) 2021-01-012021-12-31 C001789 Tec Energy Inc Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 Montana State University - Bozeman WAPA Montana State University - Bozeman FNO Montana OATT Fort Peck West Great Falls, MT 2021-01-012021-12-31 C001789 Property Tax, Property Tax, South Dakota, 2020 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND Pacificorp NF Montana OATT GLWND1 JEFF 2021-01-012021-12-31 C001789 Yankton Hilltop (SD), Transmission, Unattended 2021-12-31 C001789 Madison Unit 3 Turbine Upgrade 2021-01-012021-12-31 C001789 Treasury Stock Activity 2021-01-012021-12-31 C001789 EDF Trading North America, LLC NWMT Pacificorp NF Montana OATT COLSTRIP YTP 2021-01-012021-12-31 C001789 Great Falls Southside (GREAT FALLS), Distribution, Unattended 2021-12-31 C001789 Property Tax - Crow Tribe, Property Tax, Montana, 2021 2020-12-31 C001789 ferc:GasUtilityMember Excess Tax Depreciation 2020-12-31 C001789 ScheduleRegionalTransmissionServiceRevenuesAbstract 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC WAPA Pacificorp SFP Montana OATT CROSSOVER YTP 2021-01-012021-12-31 C001789 Hardin City (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Mobile 8 2021-12-31 C001789 Transmission Line Rights (Montana) 2021-01-012021-12-31 C001789 Barney Creek (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Dynasty Power Inc.  Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-12-31 C001789 Clyde Park, Emigrant, Wood H Frame, 556.5 MCM ACSR 2021-01-012021-12-31 C001789 Great Falls Southwest (GREAT FALLS), Distribution, Unattended 2021-12-31 C001789 Black Hills Power Inc , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Deferred Gas Storage Sales (Montana) - Docket D2001.1.1; Amortization 2001 - 2039 2021-12-31 C001789 ferc:FederalTaxMember 2020-12-31 C001789 Anthony T. Clark 2021-01-012021-12-31 C001789 EELT Tax, Other Taxes, Montana, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Missoula Miller Creek Sub siteferc:LandAndRightsMember 2021-01-012021-12-31 C001789 Montana Public Service Commission (Montana) - Docket 2017.9.78 - Order 7568 2020-12-31 C001789 Macquarie Energy LLC BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Lone Mountain Big Sky A (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 SOUTH DAKOTA PURCHASES, , 2021-01-012021-12-31 C001789 Billings Steam Plant Switchyard C (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Stanford Auto A (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 MAG Energy Solutions WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 CHS, Inc. Morgan Stanley CHS, Inc. FNO Montana OATT MATL.NWMT Various in Montana 2021-01-012021-12-31 C001789 Loweth Auto (HELENA), Transmission, Unattended 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp WAPA AVISTA SFP Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-12-31 C001789 500KV SBSU RAS Upgrade/Replacementferc:ElectricUtilityMember 2021-12-31 C001789 SD 21 General Service 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group WAPA Pacificorp NF Montana OATT GREATFALLS BRDY 2021-01-012021-12-31 C001789 Big Stone Plant B (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Canadian Montana Pipeline Corporation - Translation Adjustment 2020-12-31 C001789 Morgan Stanley Capital  Group Colstrip Partners BPA SFP Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-12-31 C001789 Butte Cora (BUTTE), Distribution, Unattended 2021-01-012021-12-31 C001789 Property Tax, Property Tax, South Dakota, 2021 2020-12-31 C001789 Internal Combustion 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-12-31 C001789 Great Falls Eastside (GREAT FALLS), Distribution, Unattended 2021-01-012021-12-31 C001789 Aberdeen 4th Street (SD), Distribution, Unattended 2021-12-31 C001789 Risk Partners Assurance, Ltd. 2021-01-012021-12-31 C001789 Aberdeen Siebrecht A (SD), Transmission, Unattended 2021-12-31 C001789 Increases (Decreases) from Sales of Donations Received from Stockholders 2021-01-012021-12-31 C001789 SD 70 Controlled Off-Peak 2021-01-012021-12-31 C001789 EDF Trading North America, LLC BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Guzman Energy, LLC  AVISTA Pacificorp SFP Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative WAPA WAPA NF Montana OATT CROSSOVER GREATFALLS 2021-01-012021-12-31 C001789 ScheduleTransmissionLinesAddedAbstract 2021-01-012021-12-31 C001789 FICA and Medicare, Federal Tax, Montana, 2021 2021-12-31 C001789 Black Hills Power Inc Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Coal Conversion Tax, Other Taxes, North Dakota, 2021 2021-12-31 C001789 Line Creek to Red Lodgeferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Canadian Montana Pipeline Corporation - Equity in Undistributed Earnings 2021-01-012021-12-31 C001789 The Energy Authority Pacificorp WAPA NF Montana OATT BRDY CROSSOVER 2021-01-012021-12-31 C001789 Glasgow Westside (HAVRE), Distribution, Unattended 2021-12-31 C001789 Rainbow Energy Marketing Corp Colstrip Partners WAPA NF Montana OATT COLSTRIP CROSSOVER 2021-01-012021-12-31 C001789 Billings, Yellowtail, Wood H Frame, 1272 KCM ACSR 2021-01-012021-12-31 C001789 Life Insurance/Reserves and Other Misc. Charges 2021-01-012021-12-31 C001789 BONNEVILLE POWER ADMINISTRATION (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group NWMT MATL NF Montana OATT NWMTIMBALANC MATL.NWMT 2021-01-012021-12-31 C001789 Provision for Rate Refunds 2021-01-012021-12-31 C001789 Public Service Co. of Colorado MISO BPA NWMT NF Montana OATT NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Yankton East Plant A (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA SFP Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-12-31 C001789 Uncollectible Accounts 2021-01-012021-12-31 C001789 Lone Mountain Big Sky B (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:GasUtilityMember Reserves and Accruals 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Nebraska, 2020 2020-12-31 C001789 First Mortgage Bonds 5.010% (Montana) 2021-12-31 C001789 Other Minor Items (4) - some are amortized over various periods (South Dakota) 2021-01-012021-12-31 C001789 East Helena Switchyard B (HELENA), Transmission, Unattended 2021-12-31 C001789 Portland General Electric - Colstrip Loss/Startup (EXCHANGES), EX, RS 190 2021-01-012021-12-31 C001789 Shell Energy North America WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-12-31 C001789 First Mortgage Bonds 5.01% (South Dakota) 2021-01-012021-12-31 C001789 Federal Income Tax, Income Tax, Montana, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Amortization of Intangibles 2021-01-012021-12-31 C001789 Calumet Refining, LLC Talen Energy Calumet Montana Refining Company, Inc. 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MATL BPAT NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-12-31 C001789 Portland General Electric (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 10% 2021-01-012021-12-31 C001789 Oil Neal 2021-01-012021-12-31 C001789 Huron West Park C (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 First Mortgage Bonds 3.11% (Montana) 2021-01-012021-12-31 C001789 Aberdeen Manufactured Gas Plant (South Dakota) - Docket NG 11-003 2021-12-31 C001789 SW Wagner (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 TransAlta Energy Marketing AVISTA NWMT NF Montana OATT AVAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Excess Deferred Income Taxes (Montana) 2021-01-012021-12-31 C001789 Montana Operationsferc:AugustMember 2021-01-012021-12-31 C001789 ferc:MarchMember Montana Operations 2021-01-012021-12-31 C001789 Colstrip, Billings, Wood H Frame, 1272 KCM ACSR 2021-01-012021-12-31 C001789 Belgrade West Sub siteferc:LandAndRightsMember 2021-12-31 C001789 Flow-through Income Taxes (Montana) 2021-12-31 C001789 The Energy Authority WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-12-31 C001789 Guzman Energy, LLC  WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-12-31 C001789 Stillwater Wind (BILLINGS), Transmission, Unattended 2021-12-31 C001789 ferc:GasUtilityMember Unbilled Revenue 2020-12-31 C001789 Anaconda, Billings, Wood H Frame, 556.5 MCM ACSR 2021-01-012021-12-31 C001789 Portland General Electric Company BPA NWMT NF Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Talen Energy Marketing, LLC - Startup (EXCHANGES), EX, RS 190 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Montana, 2020 2021-01-012021-12-31 C001789 Redfield B (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 ferc:FederalInsuranceTaxMember 2020-12-31 C001789 Black Eagle U1 Turbine Upgrade 2021-01-012021-12-31 C001789 SD 34 Large Industrial 2021-01-012021-12-31 C001789 MAG Energy Solutions WAPA Pacificorp NF Montana OATT CROSSOVER JEFF 2021-01-012021-12-31 C001789 Excess Tax Depreciation 2021-01-012021-12-31 C001789 ferc:OtherAllocatedTaxMember 2020-12-31 C001789 ferc:OtherUtilityMember Other (Specify) 2021-01-012021-12-31 C001789 Preferred Stock - None issued 2021-12-31 C001789 MAG Energy Solutions Pacificorp MATL NF Montana OATT JEFF MATL.NWMT 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group MATL Glacier Wind NF Montana OATT MATL.NWMT GLWND1 2021-01-012021-12-31 C001789 Macquarie Energy LLC BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-12-31 C001789 The Energy Authority Pacificorp Pacificorp SFP Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 South Mills Solar 1, LLC (NON TIER II SOLAR QF), LU, 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group WAPA BPA NF Montana OATT GREATFALLS BPAT.NWMT 2021-01-012021-12-31 C001789 Hebgen 2021-12-31 C001789 ferc:SalesAndUseTaxMember 2020-12-31 C001789 Pension Plan (South Dakota) 2020-12-31 C001789 Crooked Falls B (GREAT FALLS), Transmission, Unattended 2021-12-31 C001789 First Mortgage Bonds 4.30% (South Dakota) 2021-12-31 C001789 Billings Eighth Street (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 CHELAN COUNTY PUD, LF, Reserve Energy 2021-01-012021-12-31 C001789 1869, Thompson Falls 2021-12-31 C001789 ferc:OtherLicenseAndFeesTaxMember 2021-12-31 C001789 Bridger City (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 Laurel City (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Musselshell Wind (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Cochrane Intake Screen Upgradeferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Huron City A (SD), Distribution, Unattended 2021-12-31 C001789 E. Gallatin transformer upgradeferc:ElectricUtilityMember 2021-12-31 C001789 Macquarie Energy LLC NWMT WAPA NF Montana OATT CANYONFERRY CROSSOVER 2021-01-012021-12-31 C001789 Belgrade West (BOZEMAN), Transmission, Unattended 2021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND AVISTA SFP Montana OATT GLWND2 AVAT.NWMT 2021-01-012021-12-31 C001789 Cochrane Intake Screen Upgradeferc:ElectricUtilityMember 2021-12-31 C001789 Portland General Electric Company BPA NWMT SFP Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Dynasty Power Inc.  BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 0 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMemberferc:ElectricPlantInServiceMember 2020-12-31 C001789 Neal 2021-12-31 C001789 Highmore 2021-01-012021-12-31 C001789 Henry (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Puget Sound Energy Marketing Colstrip Partners BPA SFP Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 South Butte B (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 South Dakota Operationsferc:Quarter2Member 2021-01-012021-12-31 C001789 Cochrane Intake Screen Upgrade 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Federal Unemplyment Tax, Unemployment Tax, Montana, 2021 2021-01-012021-12-31 C001789 Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA SFP Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-12-31 C001789 Dynasty Power Inc.  WAPA NWMT NF Montana OATT CROSSOVER NWMT.SYSTEM 2021-01-012021-12-31 C001789 SACRAMENTO MUNICIPAL UTILITY DISTRICT, LF, Reserve Energy 2021-01-012021-12-31 C001789 Columbus Auto (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Federal Unemplyment Tax, Unemployment Tax, South Dakota, 2021 2021-12-31 C001789 MHD (BUTTE), Distribution, Unattended 2021-12-31 C001789 ferc:NovemberMember Montana Operations 2021-01-012021-12-31 C001789 Clark Jct. (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Bozeman Jackrabbit Auto (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 Two Dot Wind Swyd (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp AVISTA Pacificorp SFP Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 The Energy Authority WAPA BPAT NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Colstrip City (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Boulder Auto (HELENA), Transmission, Unattended 2021-12-31 C001789 Mercuria Energy America, LLC AVISTA Pacificorp NF Montana OATT AVAT.NWMT BRDY 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember FICA and Medicare, Federal Tax, South Dakota, 2021 2021-01-012021-12-31 C001789 Capital Power Energy Marketing, Inc. BPA MATL NF Montana OATT BPAT.NWMT MATL.NWMT 2021-01-012021-12-31 C001789 ferc:GeneralPlantMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 CHS (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 Columbus East (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 PacifiCorp BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 ferc:GasUtilityMember Excess Tax Depreciation 2021-01-012021-12-31 C001789 ferc:OtherStateTaxMember 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMemberferc:PayrollTaxMember 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC NWMT NWMT NF Montana OATT KERR GTFALLSNWMT 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMemberferc:SeveranceTaxMember 2021-01-012021-12-31 C001789 Delaware Franchise Tax, Franchise Tax, South Dakota, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA NF Montana OATT TFALLS BPAT.NWMT 2021-01-012021-12-31 C001789 WET Tax, Other Taxes, Montana, 2020 2020-12-31 C001789 Yankton East B (SD), Transmission, Unattended 2021-12-31 C001789 ferc:OtherUtilityOrNonutilityMember Account 255 balance 2021-01-012021-12-31 C001789 Other Debit or Cr. Items (Describe, details in footnote):ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Shell Energy North America Pacificorp WAPA NF Montana OATT BRDY CROSSOVER 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Iowa, 2020 2020-12-31 C001789 First Mortgage Bonds 3.98% (Montana) B 2021-01-012021-12-31 C001789 Ovando Switchyard (MISSOULA), Transmission, Unattended 2021-12-31 C001789 Energy Keepers, Inc NWMT BPA OLF Montana OATT KERR BPAT.NWMT 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, South Dakota, 2021 2020-12-31 C001789 EDF Trading North America, LLC NWMT Pacificorp SFP Montana OATT COLSTRIP YTP 2021-01-012021-12-31 C001789 AMI Metering & Infrastructureferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.15% (Montana) 2021-01-012021-12-31 C001789 Plains (MISSOULA), Distribution, Unattended 2021-12-31 C001789 ferc:OtherPropertyTaxMember 2021-01-012021-12-31 C001789 E. Gallatin transformer upgrade 2021-01-012021-12-31 C001789 Minor Projects (Less than $1,000,000 - 149 items)ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Garnell Pipeline (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Judith Gap South (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT HOLTER JEFF 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC AVISTA BPA SFP Montana OATT AVAT.NWMT BPAT.NWMT 2021-01-012021-12-31 C001789 CTC QF Over/Under Collections (Montana) - Docket 97.9.90 and Docket 2001.1.15; Annual Amortization 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group Pacificorp BPA NF Montana OATT YTP NWMT.SYSTEM 2021-01-012021-12-31 C001789 ferc:NextTwelveMonthsMemberferc:SulfurDioxideMember 2020-12-31 C001789 Cham. Missouri View (SD), Distribution, Unattended 2021-12-31 C001789 ferc:ExciseTaxMember 2021-12-31 C001789 Personal Property - Auto, Other Taxes, Montana, 2021 2020-12-31 C001789 Stickney Jct. (SD), Transmission, Unattended 2021-12-31 C001789 Turnbull Hydro, LLC (PURCHASED POWER SUPPLY), LU, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Portland General Electric Company AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 General Mills Operations, LLC Talen Energy General Mills Operations, LLC FNO Montana OATT Colstrip Great Falls, MT 2021-01-012021-12-31 C001789 Alkali Creek (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Heavy Highway Tax, Other Taxes, Montana, 2021 2021-01-012021-12-31 C001789 Great Falls City (GREAT FALLS), Distribution, Unattended 2021-12-31 C001789 ferc:OtherUseTaxMember 2020-12-31 C001789 Portland General Electric Company BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Valier-Williams (GREAT FALLS), Distribution, Unattended 2021-12-31 C001789 Consumer Counsel, Other Taxes, Montana, 2020 2021-01-012021-12-31 C001789 Yellowtail to Billings 230kV 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, South Dakota, 2021 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Property Tax, Property Tax, North Dakota, 2021 2021-01-012021-12-31 C001789 2188, Rainbow 2021-01-012021-12-31 C001789 Roosevelt (Tower Falls) 2021-12-31 C001789 Hardin Auto A (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Projects & Studies Prepaid by Customers (Montana) 2021-12-31 C001789 Western Area Power Admin WAPA WAPA NF Montana OATT CROSSOVER GREATFALLS 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Iowa, 2020ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group MATL AVISTA NF Montana OATT MATL.NWMT AVAT.NWMT 2021-01-012021-12-31 C001789 Aberdeen Ethanol (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Use Tax, Sales And Use Tax, South Dakota, 2021 2021-01-012021-12-31 C001789 ferc:SulfurDioxideMemberferc:TwoYearsMember 2020-12-31 C001789 ferc:RealEstateTaxMember 2021-01-012021-12-31 C001789 Macquarie Energy LLC WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-12-31 C001789 WMU West Sub (SD), Transmission, Unattended 2021-12-31 C001789 Mobile 8 2021-01-012021-12-31 C001789 Avista Corporation AVISTA NWMT SFP Montana OATT AVAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Gas Aberdeen #2 2021-01-012021-12-31 C001789 Jackrabbit , Big Sky, Wood H Frame, 556 KCMIL ACSR 2021-01-012021-12-31 C001789 Minor Item (Corporate) 2021-12-31 C001789 500KV SBSU RAS Upgrade/Replacement 2021-01-012021-12-31 C001789 Huron West Park C (SD), Transmission, Unattended 2021-12-31 C001789 Lake Helena (HELENA), Transmission, Unattended 2021-12-31 C001789 Macquarie Energy LLC NWMT WAPA NF Montana OATT COLSTRIP CROSSOVER 2021-01-012021-12-31 C001789 Bozeman East Gallatin Auto (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Belgrade (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Morgan Stanley Capital  Group NWMT NWMT NF Montana OATT KERR NWMT.SYSTEM 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND WAPA SFP Montana OATT GLWND2 CROSSOVER 2021-01-012021-12-31 C001789 Montana Operationsferc:Quarter3Member 2021-01-012021-12-31 C001789 Compensated Absences (Montana) - Docket 97.11.219 2021-12-31 C001789 Dynasty Power Inc.  Pacificorp AVISTA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 The Energy Authority BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group NWMT NWMT NF Montana OATT COLSTRIP NWMT.SYSTEM 2021-01-012021-12-31 C001789 ferc:GasUtilityMember 2021-12-31 C001789 Morgan Stanley Capital  Group BPA MATL SFP Montana OATT BPAT.NWMT MATL.NWMT 2021-01-012021-12-31 C001789 ferc:OtherUseTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Mitchell Bridle Acres (SD), Distribution, Unattended 2021-12-31 C001789 QUALIFYING FACILITIES, , 2021-01-012021-12-31 C001789 ferc:GasUtilityMember Pension/Postretirement Benefits 2021-01-012021-12-31 C001789 Aberdeen Manufactured Gas Plant (South Dakota) - Docket NG 11-003 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group CNTP NWMT NF Montana OATT HARDIN NWMT.SYSTEM 2021-01-012021-12-31 C001789 Lodge Creek Pipelines, LLC 2021-01-012021-12-31 C001789 Eugene Water & Electric Board (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.176% (Montana) 2021-01-012021-12-31 C001789 Missoula Russell Street (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 2019-12-31 C001789 Portland General Electric Company Colstrip Partners NWMT NF Montana OATT COLSTRIP TOWNSEND 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, South Dakota, 2020 2021-12-31 C001789 Clark 2021-12-31 C001789 Laurel Auto (BILLINGS), Transmission, Unattended 2021-12-31 C001789 ferc:IncomeTaxMember 2021-12-31 C001789 City License Tax, Local Tax, Montana, 2021 2021-01-012021-12-31 C001789 EDF Trading North America, LLC NWMT WAPA NF Montana OATT COLSTRIP CROSSOVER 2021-01-012021-12-31 C001789 Colstrip 500 (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Hydro Invasive Species Tax, Other Taxes, Montana, 2021 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND WAPA NF Montana OATT GLWND1 CROSSOVER 2021-01-012021-12-31 C001789 Minor Projects (Less than $1,000,000 - 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Electric , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Broadview Switchyard A (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 The Energy Authority BPA WAPA SFP Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Montana Public Service Commission, Other Taxes, Montana, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Tenaska BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-12-31 C001789 Macquarie Energy LLC (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative Pacificorp Pacificorp NF Montana OATT BRDY MLCK 2021-01-012021-12-31 C001789 Shell Energy North America AVISTA BPA NF Montana OATT AVAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMemberferc:OtherAllocatedTaxMember 2021-01-012021-12-31 C001789 Macquarie Energy LLC Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 ferc:NextTwelveMonthsMemberferc:SulfurDioxideMember 2021-12-31 C001789 WET Tax, Other Taxes, Montana, 2021 2021-01-012021-12-31 C001789 Tiber Montana, LLC (PURCHASED POWER SUPPLY), LU, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Property Tax - 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City of Great Falls FNO Montana OATT Kerr Various in Montana 2021-01-012021-12-31 C001789   Green Meadow Solar, LLC (NON TIER II SOLAR QF), LU, 2021-01-012021-12-31 C001789 2021-01-012021-12-31 C001789 Energy Keepers, Inc Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 First Mortgage Bonds 3.11% (Montana) 2021-12-31 C001789 Shell Energy North America WAPA NWMT NF Montana OATT CROSSOVER NWMT.SYSTEM 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group AVISTA MATL NF Montana OATT AVAT.NWMT MATL.NWMT 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, Montana, 2020 2021-12-31 C001789 Property Tax, Property Tax, South Dakota, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Supply: 2021-01-012021-12-31 C001789 PPLM Share of WET Tax (Montana) 2021-01-012021-12-31 C001789 Western Area Power Administation (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 ferc:PenaltyTaxMember 2020-12-31 C001789 TOTAL, , , 2021-01-012021-12-31 C001789 Yankton 2021-12-31 C001789 3% 2021-01-012021-12-31 C001789 Regulatory Asset/Liability 2021-01-012021-12-31 C001789 WAPA (Various) (SOUTH DAKOTA PURCHASES), OS, 29 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp Pacificorp WAPA NF Montana OATT BRDY CROSSOVER 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT AVISTA SFP Montana OATT MATL.NWMT AVAT.NWMT 2021-01-012021-12-31 C001789 ferc:PayrollTaxMember 2021-12-31 C001789 SD 16 Inter Irrigation 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND NWMT SFP Montana OATT GLWND2 GREATFALLS 2021-01-012021-12-31 C001789 Hebgen 2021-01-012021-12-31 C001789 Billings Rimrock C (BILLINGS), Transmission, Unattended 2021-12-31 C001789 WAPA Mt. 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Pacificorp BPAT NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Landers Fork (HELENA), Distribution, Unattended 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group MATL WAPA SFP Montana OATT MATL.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Mill Creek A (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Aberdeen Manufactured Gas Plant (South Dakota) - Docket NG 11-003 2020-12-31 C001789   Hydrodynamics - Strawberry Creek (TIER II QF), LU, 2021-01-012021-12-31 C001789 Energy Keepers, Inc NWMT Pacificorp LFP Montana OATT KERR BRDY 2021-01-012021-12-31 C001789 ferc:GasUtilityMember 2020-12-31 C001789 Shell Energy North America Pacificorp AVISTA NF Montana OATT BRDY AVAT.NWMT 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMemberferc:PropertyTaxMember 2021-01-012021-12-31 C001789 Billings Steam Plant Switchyard C (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Property Tax, Property Tax, North Dakota, 2020 2021-01-012021-12-31 C001789 Unbilled Revenue 2021-01-012021-12-31 C001789 Missoula, Hamilton A, Wood H Frame, 556.5 MCM ACSR 2021-01-012021-12-31 C001789 MONTANA POINT-TO-POINT      2021-01-012021-12-31 C001789 WMU West Sub (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Lone to Meadow Reconductorferc:ElectricUtilityMember 2021-12-31 C001789 NATURENER WIND WATCH (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 ferc:StateTaxMember 2021-01-012021-12-31 C001789 ferc:SalesAndUseTaxMember 2021-01-012021-12-31 C001789 ferc:GenerationStudiesMember Optional Studies 2021-01-012021-12-31 C001789 Projects & Studies Prepaid by Customers (Montana) 2021-01-012021-12-31 C001789 Reserves and Accruals 2021-01-012021-12-31 C001789 ferc:FederalInsuranceTaxMember 2021-12-31 C001789 Kerr Switchyard (MISSOULA), Transmission, Unattended 2021-01-012021-12-31 C001789 Mobile 5 2021-12-31 C001789 Brookfield Energy Marketing LP BPA NWMT NF Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Codington Clark Electric (SOUTH DAKOTA PURCHASES), OS, 2021-01-012021-12-31 C001789 Family Protector Plan Future Payments (South Dakota) 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC Pacificorp MATL.NWMT NF Montana OATT YTP MATL.NWMT 2021-01-012021-12-31 C001789 Missoula Target Range (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 Town of Philipsburg Town of Philipsburg Town of Philipsburg FNO Montana OATT Philipsburg Substation Philipsburg, MT 2021-01-012021-12-31 C001789 Property Tax - Crow Tribe, Property Tax, Montana, 2021 2021-01-012021-12-31 C001789 2021-01-012021-09-30 C001789 Imerys Talc America, Inc. Energy Keepers Inc. Imerys Talc America, Inc. FNO Montana OATT Kerr Three Forks, MT 2021-01-012021-12-31 C001789 BPA Residential Exchange Program (Montana) - Docket 2018.8.49 Order 7630; Annual Amortization 2021-12-31 C001789   Two Dot Wind, Broadview East, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Yankton Warehouse (SD), Distribution, Unattended 2021-12-31 C001789 Federal Unemplyment Tax, Unemployment Tax, Montana, 2020 2020-12-31 C001789 Wilsall (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp Colstrip Partners Pacificorp SFP Montana OATT COLSTRIP YTP 2021-01-012021-12-31 C001789 Aberdeen SE B (SD), Distribution, Unattended 2021-12-31 C001789 Idaho Power Company Pacificorp Idaho NF Montana OATT JEFF PTSN 2021-01-012021-12-31 C001789 Billings Hawthorn Park Sub site 2021-01-012021-12-31 C001789 Mobile 4 2021-01-012021-12-31 C001789 Phillips 66 Company BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Street Light Programferc:ElectricUtilityMember 2021-12-31 C001789 Powerex  Corporation Pacificorp BPA NF Montana OATT BRDY BPAT.NWMT 2021-01-012021-12-31 C001789 Two Dot 2021-12-31 C001789 The Energy Authority, Inc. , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Pension Plan (Montana) 2020-12-31 C001789 Redfield D (SD), Transmission, Unattended 2021-12-31 C001789 Manhattan (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Missoula Reserve Street (MISSOULA), Transmission, Unattended 2021-12-31 C001789 Spion Kop 230kV Switchyard (GREAT FALLS), Transmission, Unattended 2021-01-012021-12-31 C001789 Roosevelt (Tower Falls) 2021-01-012021-12-31 C001789 Alkali Creek Sub, Laurel Baseline, Steel, Sgle Pole, 1272 MCM ACSR 2021-01-012021-12-31 C001789 ferc:RegulationAndFrequencyResponseMember 2021-01-012021-12-31 C001789 Gross Receipts Tax, Other Taxes, South Dakota, 2020 2021-12-31 C001789 Glasgow Westside (HAVRE), Distribution, Unattended 2021-01-012021-12-31 C001789 Aberdeen Industrial Park (SD), Distribution, Unattended 2021-12-31 C001789 Vigilante Elec. Coop OLF 2021-01-012021-12-31 C001789 MT General Service - 1 2021-01-012021-12-31 C001789 Pollution Control Revenue Bonds - 2.00% Series, City of Forsyth (Montana) 2021-01-012021-12-31 C001789 NorthWestern Energy Solutions - Capital Stock 2020-12-31 C001789 First Mortgage Bonds 3.21% (South Dakota) 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative BPA WAPA NF Montana OATT BPAT.NWMT GREATFALLS 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp SFP Montana OATT CANYONFERRY BRDY 2021-01-012021-12-31 C001789 ferc:ExciseTaxMember 2021-01-012021-12-31 C001789 Neal 2021-01-012021-12-31 C001789 Western Area Power Administration , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Three Forks South (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 Webster NW (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Western Area Power Admin WAPA NWMT NF Montana OATT GREATFALLS NWMT.SYSTEM 2021-01-012021-12-31 C001789 Butte Concentrator (BUTTE), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember RIMROCK SUB REBUILD 2021-01-012021-12-31 C001789 Total South Dakota 2021-12-31 C001789 Canadian Montana Pipeline Corporation - Translation Adjustment 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC BPA NWMT NF Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group MATL BPA SFP Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-12-31 C001789 Excess Deferred Income Taxes 2021-01-012021-12-31 C001789 Redfield 2021-01-012021-12-31 C001789 Federal Unemplyment Tax, Unemployment Tax, Montana, 2021 2021-12-31 C001789 Spion Kop 2021-01-012021-12-31 C001789 Powerex  Corporation AVISTA WAPA NF Montana OATT AVAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Powerex  Corporation Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA NF Montana OATT BGI BPAT.NWMT 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMemberferc:OtherProductionPlantMember 2021-01-012021-12-31 C001789 Mitchell Lake Mitchell (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Consumer Counsel, Other Taxes, Montana, 2021 2021-12-31 C001789 Energy Keepers, Inc BPA NWMT NF Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group AVISTA Glacier Wind NF Montana OATT AVAT.NWMT GLWND2 2021-01-012021-12-31 C001789 Reconciliation Act of 1986 2021-01-012021-12-31 C001789 South Butte A (BUTTE), Transmission, Unattended 2021-12-31 C001789 First Mortgage Bonds 3.21% (Montana) 2021-01-012021-12-31 C001789 MidAmerican Energy (SOUTH DAKOTA PURCHASES), OS, 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group MATL NWMT NF Montana OATT MATL.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Roundup Auto (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Livingston Westside A (BOZEMAN), Transmission, Unattended 2021-12-31 C001789 NorthWestern Services, LLC 2021-12-31 C001789 ferc:JanuaryMember Montana Operations 2021-01-012021-12-31 C001789 EDF Trading North America, LLC NWMT MATL.NWMT NF Montana OATT COLSTRIP MATL.NWMT 2021-01-012021-12-31 C001789 Helena Valley (HELENA), Distribution, Unattended 2021-01-012021-12-31 C001789 Field Inventory (South Dakota) - Docket EL 14-106 2021-01-012021-12-31 C001789 All 50 kV, , Various, 2021-01-012021-12-31 C001789 2301, Mystic Lake 2021-01-012021-12-31 C001789 PACIFICORP (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 Montana Operationsferc:AprilMember 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group PPLM AVISTA NF Montana OATT KERR AVAT.NWMT 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Property Tax, Property Tax, South Dakota, 2020 2021-12-31 C001789 The Energy Authority Pacificorp AVA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 Clarkfork and Blackfoot, LLC 2021-01-012021-12-31 C001789 Belgrade West Sub site 2021-01-012021-12-31 C001789 ferc:OtherTaxesAndFeesMember 2020-12-31 C001789 Yellowtail to Billings 230kVferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Portland General Electric , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Golden Sunlight (BUTTE), Distribution, Unattended 2021-12-31 C001789 Gordon Butte (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Huron City A (SD), Distribution, Unattended 2021-01-012021-12-31 C001789   Wisconsin Creek, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Waldorf (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 South Dakota Operationsferc:Quarter3Member 2021-01-012021-12-31 C001789 Three Rivers, Jackrabbit, SAHP Single Pole, 556 KCMIL ACSR 2021-01-012021-12-31 C001789 Wagner (SD), Distribution, Unattended 2021-12-31 C001789 Nebraska 2021 Natural Gas Cold Weather Event - Docket NG-111/PI-237 2021-01-012021-12-31 C001789 Bonner (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 Property Tax - Blackfoot, Property Tax, Montana, 2021 2020-12-31 C001789 ferc:OtherFederalTaxMember 2021-01-012021-12-31 C001789 MT Lighting 2021-01-012021-12-31 C001789 Billings King Avenue (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Talen Montana, LLC Avista Energy Colstrip Steam Electric Station FNO Montana OATT Colstrip Nichols Pump Sub 2021-01-012021-12-31 C001789 ferc:ExciseTaxMember 2020-12-31 C001789 Rainbow Energy Marketing Corp BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Colstrip City (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT COLSTRIP JEFF 2021-01-012021-12-31 C001789 Manufactured Gas Plants (South Dakota) - Docket NG 11-003 2021-12-31 C001789 Property Tax, Property Tax, Montana, 2020ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Powerex  Corporation Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 TOTAL, , , 2021-12-31 C001789 Billings Eighth Street (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Addendum 27 to Attachment H of Southwest Power Pool Open Access Transmission Tariff, ER20-1090-000 and ER20-1961-001 (not consolidated) 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Environmental Management System 2021-01-012021-12-31 C001789 Trident Auto (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 Risk Partners Assurance, Ltd. - Equity in Undistributed Earnings 2020-12-31 C001789 SD 34 Industrial Power 2021-01-012021-12-31 C001789 ferc:OtherUtilityMember 2021-12-31 C001789 NATURENER GLACIER WIND, LF, Reserve Energy 2021-01-012021-12-31 C001789 NATURENER WIND WATCH, LF, Reserve Energy 2021-01-012021-12-31 C001789 Total Yellowstone Park 2021-01-012021-12-31 C001789 Missoula Russell Street (MISSOULA), Distribution, Unattended 2021-12-31 C001789 Neal #4, Iowa (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 First Mortgage Bonds 5.71% (Montana) 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Butte Cora (BUTTE), Distribution, Unattended 2021-12-31 C001789 RIMROCK SUB REBUILD 2021-01-012021-12-31 C001789 Flow-through Income Taxes (South 2021-01-012021-12-31 C001789 ferc:FebruaryMember South Dakota Operations 2021-01-012021-12-31 C001789 Shell Energy North America (US), L.P. (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 The Energy Authority Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-12-31 C001789 Street Light Program 2021-01-012021-12-31 C001789 Phillips 66 Company , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Guzman Energy, LLC  Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Portland General Electric Company Colstrip Partners BPA NF Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-12-31 C001789 Peterson Flats (BUTTE), Transmission, Unattended 2021-12-31 C001789 Holter Wolf Creek (HELENA), Transmission, Unattended 2021-12-31 C001789 Portland General Electric Company Colstrip Partners AVISTA NF Montana OATT COLSTRIP AVAT.NWMT 2021-01-012021-12-31 C001789 Billings Capacity Planningferc:ElectricUtilityMember 2021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND NWMT NF Montana OATT GLWND1 NWMT.SYSTEM 2021-01-012021-12-31 C001789 Mitchell Bridle Acres (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 ferc:SalesAndUseTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative WAPA WAPA SFP Montana OATT CROSSOVER GREATFALLS 2021-01-012021-12-31 C001789 TransAlta Energy Marketing Pacificorp WAPA NF Montana OATT BRDY CROSSOVER 2021-01-012021-12-31 C001789 Huron Gas Turbine Plant C (SD), Transmission, Unattended 2021-12-31 C001789 Spion Kop 230kV Switchyard (GREAT FALLS), Transmission, Unattended 2021-12-31 C001789 Basin Electric Power Cooperative Pacificorp NWMT SFP Montana OATT YTP NWMT.SYSTEM 2021-01-012021-12-31 C001789 Other (provide details in footnote):ferc:GasOtherFacilitiesMember 2021-01-012021-12-31 C001789 Excess Deferred Income Taxes (South Dakota) 2021-12-31 C001789 Laurel City (BILLINGS), Distribution, Unattended 2021-01-012021-12-31 C001789 Yankton Sacred Heart (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Iowa, 2021 2021-12-31 C001789 10%ferc:ElectricUtilityMember 2021-12-31 C001789 SD 25 Comm Heating 2021-01-012021-12-31 C001789 Broadview Switchyard B (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Cham. Missouri View (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp Colstrip Partners Pacificorp NF Montana OATT COLSTRIP YTP 2021-01-012021-12-31 C001789 Guzman Energy, LLC  BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative Pacificorp NWMT NF Montana OATT YTP NWMT.SYSTEM 2021-01-012021-12-31 C001789 Use Tax, Sales And Use Tax, South Dakota, 2020 2021-01-012021-12-31 C001789 FAS 112 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-01-012021-12-31 C001789 Livingston Westside C (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 Federal Tax Expense/(Benefit) @ 21% 2021-01-012021-12-31 C001789 500 kV Operations - Partner's Share (Montana) 2021-01-012021-12-31 C001789 Mobile 2 2021-12-31 C001789 ScheduleEnergyStorageOperationsLargePlantsAbstract 2021-01-012021-12-31 C001789 ferc:OtherAllocatedTaxMember 2021-12-31 C001789 Tenaska NWMT Pacificorp NF Montana OATT COLSTRIP BRDY 2021-01-012021-12-31 C001789 Macquarie Energy LLC Pacifcorp NWMT NF Montana OATT YTP MATL.NWMT 2021-01-012021-12-31 C001789 Deferred Directors' Compensation (South Dakota) 2021-01-012021-12-31 C001789 NON TIER II QF-1 CONTRACTS, , 2021-01-012021-12-31 C001789 TransAlta Energy Marketing Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Aberdeen #1 2021-12-31 C001789 Montana OATT, Attachment O, Formula Rate Protocols and Template, ER19-1756-001 2021-01-012021-12-31 C001789 Missoula Butler Creek (MISSOULA), Distribution, Unattended 2021-12-31 C001789 Robert Rowe 2021-01-012021-12-31 C001789 Two Dot Wind Swyd (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Richardson Coulee (HAVRE), Transmission, Unattended 2021-01-012021-12-31 C001789 Seattle City Light , SF, Market-Based Rate 2021-01-012021-12-31 C001789 Minor Item (Corporate) 2020-12-31 C001789 Portland General Electric Company AVISTA NWMT NF Montana OATT AVAT.NWMT COLSTRIP 2021-01-012021-12-31 C001789 Custer Auto (HELENA), Transmission, Unattended 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-12-31 C001789 Aberdeen A (SD), Transmission, Unattended 2021-12-31 C001789 Aberdeen Country Club (SD), Distribution, Unattended 2021-12-31 C001789 Bozeman Patterson (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Macquarie Energy LLC BPA NWMT SFP Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Montana Operationsferc:JuneMember 2021-01-012021-12-31 C001789 Personal Property - Auto, Other Taxes, South Dakota, 2021 2021-12-31 C001789 ferc:ElectricUtilityMember Compensation Accruals 2020-12-31 C001789 Western Area Power Admin Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-12-31 C001789 MT General Service - 2 Unbilled 2021-01-012021-12-31 C001789 Billings Rimrock D (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Flow-through Income Taxes (South 2021-12-31 C001789 4% 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC NWMT NWMT NF Montana OATT KERR NWMT.SYSTEM 2021-01-012021-12-31 C001789 SD 15 Residential Dual-Fuel 2021-01-012021-12-31 C001789 TransAlta Energy Marketing (US) Inc. , SF, Market-Based Rate 2021-01-012021-12-31 C001789 ScheduleResearchDevelopmentOrDemonstrationExpendituresAbstract 2021-01-012021-12-31 C001789 City License Tax, Local Tax, Montana, 2021 2021-12-31 C001789 Yankton East A (SD), Transmission, Unattended 2021-12-31 C001789 Consumer Counsel, Other Taxes, Montana, 2020 2020-12-31 C001789 Britt E. Ide 2021-01-012021-12-31 C001789 Missoula City Rebuild 2021-01-012021-12-31 C001789 Great Falls Southside (GREAT FALLS), Distribution, Unattended 2021-01-012021-12-31 C001789 Permanent Uncertain Tax Positions (Corporate) 2021-12-31 C001789 Consumer Counsel, Other Taxes, Montana, 2021 2020-12-31 C001789 Macquarie Energy LLC NWMT WAPA SFP Montana OATT COLSTRIP CROSSOVER 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group NWMT MATL SFP Montana OATT COLSTRIP MATL.NWMT 2021-01-012021-12-31 C001789 Guzman Energy, LLC (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Aberdeen #2 2021-01-012021-12-31 C001789 Big Stone 2021-12-31 C001789 Huron Gas Turbnie Plant B (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Yankton SE (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 SD 11 Resid Space Htg 1 Meter 2021-01-012021-12-31 C001789 Capital Leases (miscellaneous) 2021-01-012021-12-31 C001789 TransAlta Energy Marketing MATL WAPA NF Montana OATT MATL.NWMT CROSSOVER 2021-01-012021-12-31 C001789 PacifiCorp BPA NWMT NF Montana OATT BPAT.NWMT COLSTRIP 2021-01-012021-12-31 C001789 Energy Stored in Out of State Utilities (Montana) 2020-12-31 C001789 Old Faithful 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMemberferc:LocalTaxMember 2021-01-012021-12-31 C001789 ferc:AdValoremTaxMember 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT CANYONFERRY JEFF 2021-01-012021-12-31 C001789 ferc:GasUtilityMember Pension/Postretirement Benefits 2020-12-31 C001789 Yankton City (SD), Distribution, Unattended 2021-12-31 C001789 Morgan Stanley Capital  Group BPA MATL NF Montana OATT BPAT.NWMT MATL.NWMT 2021-01-012021-12-31 C001789   Flint Creek Hydroelectric, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Big Timber Wind (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp WAPA NWMT SFP Montana OATT CROSSOVER NWMT.SYSTEM 2021-01-012021-12-31 C001789 The Energy Authority BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-12-31 C001789 Capital Power Energy Marketing, Inc. WAPA BPAT NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Idaho Power Company Pacificorp Idaho NF Montana OATT JEFF TNDY 2021-01-012021-12-31 C001789 Anaconda City (BUTTE), Distribution, Unattended 2021-12-31 C001789 Aberdeen Siebrecht B (SD), Transmission, Unattended 2021-12-31 C001789 Billings City (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Energy Keepers, Inc NWMT BPA NF Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, South Dakota, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative Pacificorp NWMT NF Montana OATT BRDY NWMT.SYSTEM 2021-01-012021-12-31 C001789 Aberdeen Siebrecht C (SD), Transmission, Unattended 2021-12-31 C001789 GRANT COUNTY PUD (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 Oak Tree (PPA Wind #2) (SOUTH DAKOTA PURCHASES), LU, 2021-01-012021-12-31 C001789 Energy Stored in Out of State Utilities (Montana) 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember RIMROCK SUB REBUILD 2021-12-31 C001789 Unbilled Revenueferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 The Energy Authority WAPA AVA SFP Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND BPA SFP Montana OATT GLWND1 BPAT.NWMT 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative Pacificorp WAPA SFP Montana OATT YTP CROSSOVER 2021-01-012021-12-31 C001789 2020-12-31 C001789 Sun River Elect Coop OLF 2021-01-012021-12-31 C001789 Powerex  Corporation BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-12-31 C001789 AMI Metering & Infrastructureferc:ElectricUtilityMember 2021-12-31 C001789 Other Debit or Cr. Items (Describe, details in footnote): 2021-01-012021-12-31 C001789 Great Falls 230 Switchyard A (GREAT FALLS), Transmission, Unattended 2021-12-31 C001789 Curtis Pohl 2021-01-012021-12-31 C001789 Day Ahead & Real Time Admin 2021-01-012021-09-30 C001789 Havre City (HAVRE), Distribution, Unattended 2021-01-012021-12-31 C001789 Montana FERC Rate Case 2021-01-012021-12-31 C001789 Stanford Auto A (BILLINGS), Transmission, Unattended 2021-12-31 C001789 2188, Cochrane 2021-12-31 C001789 Anaconda City (BUTTE), Distribution, Unattended 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative NWMT Pacificorp NF Montana OATT TFALLS YTP 2021-01-012021-12-31 C001789 Seattle City Light (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Powerex  Corporation BPA Pacificorp SFP Montana OATT BPAT.NWMT JEFF 2021-01-012021-12-31 C001789 Bozeman Westside (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Mobile 1 2021-01-012021-12-31 C001789 Clyde Park (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 Highmore 2021-12-31 C001789 Common Stock Dividend 2020-01-012020-12-31 C001789 ferc:OtherTaxesAndFeesMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 MONTANA, , 2021-01-012021-12-31 C001789 Western Area Power Admin WAPA WAPA SFP Montana OATT CROSSOVER GREATFALLS 2021-01-012021-12-31 C001789 Natural Gas Regulatory Deferrals (Montana) 2021-01-012021-12-31 C001789 ExxonMobil Corporation Talen Energy ExxonMobil Corporation FNO Montana OATT Colstrip Billings, MT 2021-01-012021-12-31 C001789 Sheridan Auto (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Tec Energy Inc Pacificorp MATL NF Montana OATT BRDY MATL.NWMT 2021-01-012021-12-31 C001789 Helena Westside B (HELENA), Distribution, Unattended 2021-01-012021-12-31 C001789 Other 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group BPA Glacier Wind NF Montana OATT BPAT.NWMT GLWND2 2021-01-012021-12-31 C001789 ferc:OtherUtilityOrNonutilityMember OTHER TOTAL 2020-12-31 C001789 Estimate Energy (PURCHASED POWER SUPPLY), , 2021-01-012021-12-31 C001789 Energy Keepers, Inc NWMT Pacificorp NF Montana OATT KERR BRDY 2021-01-012021-12-31 C001789 NorthWestern Services, LLC - Equity in Undistributed Earnings 2021-01-012021-12-31 C001789 ferc:OtherTaxMember 2021-01-012021-12-31 C001789 Macquarie Energy LLC AVISTA Pacificorp NF Montana OATT AVAT.NWMT JEFF 2021-01-012021-12-31 C001789 Mitchell S. Edgerton (SD), Distribution, Unattended 2021-12-31 C001789 FERC Administrative Charges Allocated to 2021-01-012021-12-31 C001789 TALEN MONTANA, LLC, LF, Reserve Energy 2021-01-012021-12-31 C001789 Clark 2021-01-012021-12-31 C001789 Corporate: 2021-01-012021-12-31 C001789 DOUGLAS COUNTY PUD (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 Custer Auto (HELENA), Transmission, Unattended 2021-12-31 C001789 Platte A (SD), Distribution, Unattended 2021-12-31 C001789 Minor Projects (Less than $1,000,000 - 149 items)ferc:ElectricUtilityMember 2021-12-31 C001789 ferc:ElectricUtilityMember State Unemployment Tax, Unemployment Tax, Montana, 2021 2021-01-012021-12-31 C001789 Pension Plan Requirement (Montana) 2020-12-31 C001789 FERC Order No. 472 2021-12-31 C001789 Clatskanie Peoples Utility District - Electric (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 2188, Rainbow 2021-12-31 C001789 Billings Central (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 EXCHANGES:, , 2021-01-012021-12-31 C001789 Lolo (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 First Mortgage Bonds 5.71% (Montana) 2021-12-31 C001789 ferc:IncomeTaxMember 2021-01-012021-12-31 C001789 Heartland Generation Ltd (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 Gross Receipts Tax, Other Taxes, South Dakota, 2020 2021-01-012021-12-31 C001789 Aberdeen NE Gas Plant A (SD), Distribution, Unattended 2021-12-31 C001789 Mercuria Energy America, LLC NWMT Pacificorp NF Montana OATT KERR YTP 2021-01-012021-12-31 C001789 Glacier Wind Switchyard (GREAT FALLS), Transmission, Unattended 2021-01-012021-12-31 C001789 NorthWestern Energy Solutions - Equity in Undistributed Earnings 2020-12-31 C001789 Aberdeen Fairgrounds (SD), Distribution, Unattended 2021-12-31 C001789 Puget Sound Energy Marketing BPA NWMT NF Montana OATT BPAT.NWMT COLSTRIP 2021-01-012021-12-31 C001789 Guzman Energy, LLC  Pacificorp AVISTA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-12-31 C001789 Columbus-Rajelje Auto (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Debt Financing Costs 2021-01-012021-12-31 C001789 Painted Robe (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Use Tax, Sales And Use Tax, South Dakota, 2020 2021-12-31 C001789 Consumer Counsel, Other Taxes, Montana, 2021 2021-01-012021-12-31 C001789 TransAlta Energy Marketing WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Mobile 2 2021-01-012021-12-31 C001789 Account 255 balance 2021-01-012021-12-31 C001789 Other Debit or Cr. Items (Describe, details in footnote):ferc:ElectricUtilityMemberferc:ElectricPlantInServiceMember 2021-01-012021-12-31 C001789 First Mortgage Bonds 3.98% (Montana) A 2021-01-012021-12-31 C001789 TransAlta Energy Marketing WAPA AVISTA NF Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-12-31 C001789 Powerex  Corporation Pacificorp WAPA NF Montana OATT JEFF CROSSOVER 2021-01-012021-12-31 C001789 MT Residential 2021-01-012021-12-31 C001789 Huron Gas Turbine Plant C (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 South Butte A (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Great Falls Public Schools Energy Keepers Inc. Great Falls Public Schools FNO Montana OATT Kerr Great Falls, MT 2021-01-012021-12-31 C001789 Nye (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Yankton Warehouse (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Projects & Studies Prepaid by Customer (South Dakota) 2021-12-31 C001789 First Mortgage Bonds 3.21% (Montana) 2021-12-31 C001789 Macquarie Energy LLC NWMT MATL NF Montana OATT MATL.NWMT CROSSOVER 2021-01-012021-12-31 C001789 Colstrip, Broadview A, St. Tower, 795 KCM ACSR 2021-01-012021-12-31 C001789 Property Tax, Property Tax, North Dakota, 2020ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 The Energy Authority BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 NorthWestern Services, LLC - Equity in Undistributed Earnings 2020-12-31 C001789 Belgrade West (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 Morgan Stanley Capital Group, Inc. (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 MAG Energy Solutions WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-12-31 C001789 Willow Creek Gathering, LLC 2021-01-012021-12-31 C001789 Judith Gap Auto (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Big Timber Auto (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 Mobile 3 2021-12-31 C001789 Michael Cashell 2021-01-012021-12-31 C001789 Dynasty Power Inc.  WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 Use Tax, Sales And Use Tax, South Dakota, 2020 2020-12-31 C001789 ScheduleControlOverRespondentAbstract 2021-01-012021-12-31 C001789 Havre Pipeline Company - Paid in Capital 2021-12-31 C001789 Aberdeen Industrial Park (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Regulatory Assets 2021-01-012021-12-31 C001789 ferc:JuneMember South Dakota Operations 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND Pacificorp SFP Montana OATT GLWND1 BRDY 2021-01-012021-12-31 C001789 Aberdeen A (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Powerex  Corporation BPA Pacificorp SFP Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Jan R. Horsfall 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, Montana, 2021 2021-12-31 C001789 COVID Deferral (South Dakota) 2020-12-31 C001789 First Mortgage Bonds 4.30% (Montana) 2021-12-31 C001789 Common Stock (NASDQ) 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Regulatory Asset/Liability 2020-12-31 C001789 TransAlta Energy Marketing MATL Pacificorp NF Montana OATT MATL.NWMT BRDY 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-12-31 C001789 Havre Pipeline Company - Equity in Undistributed Earnings 2021-01-012021-12-31 C001789 WET Tax, Other Taxes, Montana, 2021 2020-12-31 C001789 Big Stone Plant B (SD), Transmission, Unattended 2021-12-31 C001789 Coyote Oil 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND Pacificorp NF Montana OATT GLWND2 JEFF 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT BGI YTP 2021-01-012021-12-31 C001789 Western Area Power Administration - Reg Correction (EXCHANGES), EX, WAPA OATT 2021-01-012021-12-31 C001789 Montana Operations: 2021-01-012021-12-31 C001789 Bozeman Patterson (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-12-31 C001789 AVISTA Corporation, LF, Reserve Energy 2021-01-012021-12-31 C001789 Titan Wind (PPA Wind #1) (SOUTH DAKOTA PURCHASES), LU, 2021-01-012021-12-31 C001789 Harlowtown A (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Mercuria Energy America, LLC Pacificorp NWMT SFP Montana OATT YTP NWMT.SYSTEM 2021-01-012021-12-31 C001789 First Mortgage Bonds 4.85% (Montana) 2021-12-31 C001789 Willow Creek (BOZEMAN), Distribution, Unattended 2021-12-31 C001789 ferc:PenaltyTaxMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 ferc:FederalInsuranceTaxMember 2021-01-012021-12-31 C001789 Senior Unsecured Revolving Line of Credit ($425m) 2021-12-31 C001789 Shell Energy North America BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Montana, 2020 2021-12-31 C001789 Redfield A (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Macquarie Energy LLC Pacificorp WAPA SFP Montana OATT BRDY CROSSOVER 2021-01-012021-12-31 C001789 2188, Ryan 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group AVISTA WAPA NF Montana OATT AVAT.NWMT CROSSOVER 2021-01-012021-12-31 C001789 ferc:SeptemberMember South Dakota Operations 2021-01-012021-12-31 C001789 WAPA Mt. Vernon (SD), Transmission, Unattended 2021-12-31 C001789 Energy Keepers, Inc NWMT Pacificorp SFP Montana OATT KERR BRDY 2021-01-012021-12-31 C001789 0, Common Hydro Plant 2021-12-31 C001789 Basin Electric Power Cooperative Pacificorp WAPA NF Montana OATT YTP GREATFALLS 2021-01-012021-12-31 C001789 Bonneville Power Administration BPA WAPA NF Montana OATT BPAT.NWMT  GREATFALLS 2021-01-012021-12-31 C001789 Billings Metra Sub Siteferc:LandAndRightsMember 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA NF Montana OATT JUDITHGAP BPAT.NWMT 2021-01-012021-12-31 C001789 Aberdeen 8th Avenue (SD), Distribution, Unattended 2021-01-012021-12-31 C001789 Delaware Franchise Tax, Franchise Tax, Montana, 2021 2021-12-31 C001789 500KV SBSU RAS Upgrade/Replacementferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 Basin Electric Power Cooperative Morgan Stanley, Talen & WAPA Basin Electric Power Cooperative FNO Montana OATT Various in Montana Various NWMT & WAUW 2021-01-012021-12-31 C001789 Brule Wind (SOUTH DAKOTA PURCHASES), LU, 2021-01-012021-12-31 C001789 DGGS 2021-12-31 C001789 ferc:OperatingUtilityMember 2021-01-012021-12-31 C001789 Yankton East Plant B (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 Optional Studies 2021-01-012021-12-31 C001789 Use Tax, Sales And Use Tax, South Dakota, 2021 2021-12-31 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE98-001 2021-01-012021-12-31 C001789 EELT Tax, Other Taxes, Montana, 2021 2021-01-012021-12-31 C001789 Mitchell A (SD), Transmission, Unattended 2021-12-31 C001789 ferc:PayrollTaxMember 2021-01-012021-12-31 C001789 Clyde Park (BOZEMAN), Transmission, Unattended 2021-12-31 C001789 ferc:ElectricUtilityMember Madison Unit 3 Turbine Upgrade 2021-01-012021-12-31 C001789 ferc:JanuaryMember South Dakota Operations 2021-01-012021-12-31 C001789 ferc:HydraulicProductionPlantConventionalMemberferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 ferc:OtherTaxesAndFeesMember 2021-01-012021-12-31 C001789 Bozeman Sourdough (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group GLACIER WIND Pacificorp NF Montana OATT GLWND2 BRDY 2021-01-012021-12-31 C001789 ferc:GenerationStudiesMember SIS Studies 2021-01-012021-12-31 C001789 Study of the Costs & Benefits of Customer Generators (Montana) 2021-12-31 C001789 Rattlesnake Switchyard A (MISSOULA), Transmission, Unattended 2021-12-31 C001789 Asset Retirement Obligation (Montana) 2021-12-31 C001789 NorthWestern Services, LLC - Paid in Capital 2021-12-31 C001789 Idaho Power Company Pacificorp NWMT NF Montana OATT JEFF MLCK 2021-01-012021-12-31 C001789 Deferred Fuel for Electric Generation (South Dakota) 2020-12-31 C001789 AMI Metering & Infrastructure 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Montana, 2020 2020-12-31 C001789 Property Tax, Property Tax, North Dakota, 2021 2021-12-31 C001789 Rounding, , 2021-01-012021-12-31 C001789 Bradley Creek (BOZEMAN), Transmission, Unattended 2021-12-31 C001789 Mobile 6 2021-01-012021-12-31 C001789 ferc:Quarter1Member Montana Operations 2021-01-012021-12-31 C001789 Western Energy Armells Creek (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Huron Gas Turbnie Plant B (SD), Transmission, Unattended 2021-12-31 C001789 NOL Carryforward/Other Miscellaneous 2021-01-012021-12-31 C001789 Montana Operations: 2021-01-012021-12-31 C001789 Southwest Power Pool (SPP) SPP Various LFP SCH 7 Various Various 2021-01-012021-12-31 C001789 ferc:OtherLicenseAndFeesTaxMember 2020-12-31 C001789 Macquarie Energy LLC WAPA MATL NF Montana OATT CROSSOVER MATL.NWMT 2021-01-012021-12-31 C001789 Dillon City (BUTTE), Distribution, Unattended 2021-12-31 C001789 MAG Energy Solutions WAPA MATL NF Montana OATT CROSSOVER MATL.NWMT 2021-01-012021-12-31 C001789 Clarkfork and Blackfoot, LLC 2021-12-31 C001789 First Mortgage Bonds 4.22% (South Dakota) 2021-12-31 C001789 Federal Unemplyment Tax, Unemployment Tax, Montana, 2020 2021-12-31 C001789 Aberdeen 8th Avenue (SD), Distribution, Unattended 2021-12-31 C001789 Avista Corporation AVISTA NWMT NF Montana OATT AVAT.NWMT COLSTRIP 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group NWMT MATL NF Montana OATT JUDITHGAP MATL.NWMT 2021-01-012021-12-31 C001789 Suiza Dairy Group, LLC Talen Energy Suiza Dairy Group, LLC FNO Montana OATT Colstrip Various in Montana 2021-01-012021-12-31 C001789 Energy Keepers, Inc NWMT BPA NF Montana OATT KERR BPAT.NWMT 2021-01-012021-12-31 C001789 Gross Receipts Tax, Other Taxes, South Dakota, 2021 2021-01-012021-12-31 C001789 ferc:PropertyTaxMember 2021-12-31 C001789 Montana One (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Crooked Falls A (GREAT FALLS), Transmission, Unattended 2021-01-012021-12-31 C001789 Macquarie Energy LLC NWMT BPA NF Montana OATT MT1 BPAT.NWMT 2021-01-012021-12-31 C001789 Shell Energy North America Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789   Oversight Resources, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Energy Keepers, Inc NWMT Pacificorp SFP Montana OATT KERR YTP 2021-01-012021-12-31 C001789 Powerex  Corporation WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-12-31 C001789 Billings Rimrock C (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 Coyote, North Dakota (SD), Transmission, Unattended 2021-12-31 C001789 Missoula City Sub #1 (MISSOULA), Distribution, Unattended 2021-01-012021-12-31 C001789 Rattlesnake Switchyard B (MISSOULA), Transmission, Unattended 2021-01-012021-12-31 C001789 Exelon Generation Company, LLC (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 ferc:GasUtilityMember Regulatory Asset/Liability 2020-12-31 C001789 State Income Tax, State Tax, Montana, 2021 2021-01-012021-12-31 C001789 Mobile 5 2021-01-012021-12-31 C001789 EDF Trading North America, LLC AVISTA Pacificorp SFP Montana OATT AVAT,NWMT YTP 2021-01-012021-12-31 C001789   Magpie Solar, LLC (NON TIER II SOLAR QF), LU, 2021-01-012021-12-31 C001789 Lake 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember Hauser Unit 5 Turbine Upgrade 2021-01-012021-12-31 C001789 State Unemployment Tax, Unemployment Tax, South Dakota, 2021 2021-12-31 C001789 Dynasty Power Inc.  BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Shell Energy North America Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 All 115 kV, , Various, 2021-01-012021-12-31 C001789 Rainbow Energy Marketing Corp BPA Pacificorp SFP Montana OATT BPAT.NWMT YTP 2021-01-012021-12-31 C001789 Bonneville Power Admin NF 2021-01-012021-12-31 C001789 PORTLAND GENERAL ELECTRIC COMPANY (RESERVE SHARING), LF, Reserve Energy Services 2021-01-012021-12-31 C001789 Hot Springs, Idaho Border, Wood H Frame, 1272 KCM ACSR 2021-01-012021-12-31 C001789 Mobile 6 2021-12-31 C001789 Maroney Radial Gate Upgradeferc:ElectricUtilityMember 2021-12-31 C001789 BONNEVILLE POWER ADMINISTRATION, LF, Reserve Energy 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Montana, 2021 2020-12-31 C001789 Bozeman East Gallatin Auto (BOZEMAN), Transmission, Unattended 2021-01-012021-12-31 C001789 Property Tax - Blackfoot, Property Tax, Montana, 2021 2021-01-012021-12-31 C001789 TIER II QF CONTRACTS:, , 2021-01-012021-12-31 C001789 Montana Public Service Commission, Other Taxes, Montana, 2020 2021-12-31 C001789 Basin Electric Power Cooperative Pacificorp BPA NF Montana OATT BRDY BPAT.NWMT 2021-01-012021-12-31 C001789 Other - 30% 2021-01-012021-12-31 C001789 Chamberlin (SD), Transmission, Unattended 2021-12-31 C001789 Colstrip City (BILLINGS), Transmission, Unattended 2021-12-31 C001789 Billings Metra Sub Site 2021-01-012021-12-31 C001789 Morgan Stanley Capital  Group WAPA WAPA NF Montana OATT GREATFALLS CROSSOVER 2021-01-012021-12-31 C001789 Old Faithful 2021-12-31 C001789 NorthWestern Services, LLC 2021-01-012021-12-31 C001789 Lone Mountain Big Sky A (BOZEMAN), Distribution, Unattended 2021-01-012021-12-31 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE98-001 2021-12-31 C001789 A/R Associated Companies (Account 146) 2021-01-012021-12-31 C001789 First Mortgage Bonds 2.80% (South Dakota) 2021-01-012021-12-31 C001789 Property Tax, Property Tax, North Dakota, 2021 2021-01-012021-12-31 C001789 Mercuria Energy America, LLC Pacificorp WAPA NF Montana OATT BRDY CROSSOVER 2021-01-012021-12-31 C001789 Hydro Invasive Species Tax, Other Taxes, Montana, 2021ferc:ElectricUtilityMember 2021-01-012021-12-31 C001789 MAG Energy Solutions WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-12-31 C001789 Powerex  Corporation WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-12-31 C001789 Redfield City (SD), Transmission, Unattended 2021-12-31 C001789 Dynasty Power Inc.  Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-12-31 C001789 Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization 2021-12-31 C001789 Mitchell Lake Mitchell (SD), Distribution, Unattended 2021-12-31 C001789 Robert C. Rowe, Chief Exececutive Officer 2021-01-012021-12-31 C001789 Line of Credit (Repayments) Borrowings, Net 2020-01-012020-12-31 C001789 Puget Sound Energy (PURCHASED POWER SUPPLY), SF, Market-Based Rate Tariff 2021-01-012021-12-31 C001789 0, 0 2021-12-31 C001789 ferc:GasUtilityMember 2021-01-012021-12-31 C001789 Western Area Power Admin WAPA NWMT NF Montana OATT CROSSOVER NWMT.SYSTEM 2021-01-012021-12-31 C001789 Coyote, North Dakota (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 ferc:GasUtilityMember Regulatory Asset/Liability 2021-01-012021-12-31 C001789 ferc:PropertyTaxMember 2021-01-012021-12-31 C001789 2188, Hauser 2021-12-31 C001789 Hardin Auto B (BILLINGS), Transmission, Unattended 2021-01-012021-12-31 C001789 ASIMI (BUTTE), Transmission, Unattended 2021-01-012021-12-31 C001789 Kershaw Switchyard (GREAT FALLS), Transmission, Unattended 2021-01-012021-12-31 C001789 EDF Trading North America, LLC NWMT MATL.NWMT NF Montana OATT JUDITHGAP MATL.NWMT 2021-01-012021-12-31 C001789   Cycle Horseshoe Bend Wind, LLC (NON TIER II QF-1), LU, 2021-01-012021-12-31 C001789 Red Lodge Northside (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Coyote 2021-01-012021-12-31 C001789 Yankton Jct. A (SD), Transmission, Unattended 2021-01-012021-12-31 C001789 ferc:ElectricUtilityMember State Income Tax, State Tax, Montana, 2021 2021-01-012021-12-31 C001789 The Energy Authority WAPA AVA NF Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-12-31 C001789 SchedulePumpedStorageGeneratingPlantStatisticsAbstract 2021-01-012021-12-31 C001789 Risk Partners Assurance, Ltd. - Capital Stock 2021-01-012021-12-31 C001789 ferc:OtherUtilityMember 2021-01-012021-12-31 C001789 Powerex  Corporation BPA Pacificorp SFP Montana OATT BPAT.NWMT BRDY 2021-01-012021-12-31 C001789 Property Tax, Property Tax, Nebraska, 2020 2021-01-012021-12-31 C001789 0, Common Hydro Plant 2021-01-012021-12-31 C001789 Billings Rimrock B (BILLINGS), Distribution, Unattended 2021-12-31 C001789 Schroeder (Beethoven Wind) (SD), Transmission, Unattended 2021-12-31 C001789   Ross Creek Hydro (TIER II QF), LU, 2021-01-012021-12-31 C001789 ferc:PayrollTaxMember 2020-12-31 C001789 Guzman Energy, LLC  NWMT AVISTA NF Montana OATT KERR AVAT.NWMT 2021-01-012021-12-31 C001789 Line Interconnection Studies 2021-01-012021-12-31 C001789 Chrome Junction (BILLINGS), Transmission, Unattended 2021-12-31 C001789 ferc:PenaltyTaxMember 2021-01-012021-12-31 C001789 Montana Public Service Commission, Other Taxes, Montana, 2020 2021-01-012021-12-31 C001789 MONTANA PURCHASES, , 2021-01-012021-12-31 C001789 EDF Trading North America, LLC BPA NWMT SFP Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-12-31 C001789 Kerr Switchyard (MISSOULA), Transmission, Unattended 2021-12-31 C001789 Energy Keepers, Inc. , SF, Market-Based Rate 2021-01-012021-12-31 C001789 ferc:OtherUtility3Member 2021-12-31 C001789 ferc:IncomeTaxMember 2020-12-31 iso4217:USD utr:kWh utr:mi iso4217:USD utr:Barrel xbrli:shares utr:Tons iso4217:USD utr:kW utr:Btu utr:kWh iso4217:USD utr:Tons utr:MWh utr:kWh utr:Barrels iso4217:USD utr:MW utr:MW xbrli:pure utr:MMBTU iso4217:USD utr:Barrel xbrli:pure utr:mi iso4217:USD xbrli:shares iso4217:USD utr:MMBTU utr:kV iso4217:USD utr:Barrels utr:Btu utr:MVA
THIS FILING IS
Item 1:
An Initial (Original) Submission
OR
Resubmission No.

FERC FINANCIAL REPORT
FERC FORM No. 1: Annual Report of
Major Electric Utilities, Licensees
and Others and Supplemental
Form 3-Q: Quarterly Financial Report

These reports are mandatory under the Federal Power Act, Sections 3, 4(a), 304 and 309, and 18 CFR 141.1 and 141.400. Failure to report may result in criminal fines, civil penalties and other sanctions as provided by law. The Federal Energy Regulatory Commission does not consider these reports to be of confidential nature
Exact Legal Name of Respondent (Company)

NorthWestern Corporation
Year/Period of Report

End of:
2021
/
Q4


INSTRUCTIONS FOR FILING FERC FORM NOS. 1 and 3-Q

GENERAL INFORMATION

  1. Purpose

    FERC Form No. 1 (FERC Form 1) is an annual regulatory requirement for Major electric utilities, licensees and others (18 C.F.R. § 141.1). FERC Form No. 3-Q ( FERC Form 3-Q) is a quarterly regulatory requirement which supplements the annual financial reporting requirement (18 C.F.R. § 141.400). These reports are designed to collect financial and operational information from electric utilities, licensees and others subject to the jurisdiction of the Federal Energy Regulatory Commission. These reports are also considered to be non-confidential public use forms.
  2. Who Must Submit

    Each Major electric utility, licensee, or other, as classified in the Commission’s Uniform System of Accounts Prescribed for Public Utilities, Licensees, and Others Subject To the Provisions of The Federal Power Act (18 C.F.R. Part 101), must submit FERC Form 1 (18 C.F.R. § 141.1), and FERC Form 3-Q (18 C.F.R. § 141.400).

    Note: Major means having, in each of the three previous calendar years, sales or transmission service that exceeds one of the following:
    1. one million megawatt hours of total annual sales,
    2. 100 megawatt hours of annual sales for resale,
    3. 500 megawatt hours of annual power exchanges delivered, or
    4. 500 megawatt hours of annual wheeling for others (deliveries plus losses).
  3. What and Where to Submit

    1. Submit FERC Form Nos. 1 and 3-Q electronically through the eCollection portal at https://eCollection.ferc.gov, and according to the specifications in the Form 1 and 3-Q taxonomies.
    2. The Corporate Officer Certification must be submitted electronically as part of the FERC Forms 1 and 3-Q filings.
    3. Submit immediately upon publication, by either eFiling or mail, two (2) copies to the Secretary of the Commission, the latest Annual Report to Stockholders. Unless eFiling the Annual Report to Stockholders, mail the stockholders report to the Secretary of the Commission at:
      Secretary
      Federal Energy Regulatory Commission 888 First Street, NE
      Washington, DC 20426
    4. For the CPA Certification Statement, submit within 30 days after filing the FERC Form 1, a letter or report (not applicable to filers classified as Class C or Class D prior to January 1, 1984). The CPA Certification Statement can be either eFiled or mailed to the Secretary of the Commission at the address above.

      The CPA Certification Statement should:
      1. Attest to the conformity, in all material aspects, of the below listed (schedules and pages) with the Commission's applicable Uniform System of Accounts (including applicable notes relating thereto and the Chief Accountant's published accounting releases), and
      2. Be signed by independent certified public accountants or an independent licensed public accountant certified or licensed by a regulatory authority of a State or other political subdivision of the U. S. (See 18 C.F.R. §§ 41.10-41.12 for specific qualifications.)

        Schedules
        Pages
        Comparative Balance Sheet 110-113
        Statement of Income 114-117
        Statement of Retained Earnings 118-119
        Statement of Cash Flows 120-121
        Notes to Financial Statements 122-123
    5. The following format must be used for the CPA Certification Statement unless unusual circumstances or conditions, explained in the letter or report, demand that it be varied. Insert parenthetical phrases only when exceptions are reported.

      “In connection with our regular examination of the financial statements of [COMPANY NAME] for the year ended on which we have reported separately under date of [DATE], we have also reviewed schedules [NAME OF SCHEDULES] of FERC Form No. 1 for the year filed with the Federal Energy Regulatory Commission, for conformity in all material respects with the requirements of the Federal Energy Regulatory Commission as set forth in its applicable Uniform System of Accounts and published accounting releases. Our review for this purpose included such tests of the accounting records and such other auditing procedures as we considered necessary in the circumstances.

      Based on our review, in our opinion the accompanying schedules identified in the preceding paragraph (except as noted below) conform in all material respects with the accounting requirements of the Federal Energy Regulatory Commission as set forth in its applicable Uniform System of Accounts and published accounting releases.” The letter or report must state which, if any, of the pages above do not conform to the Commission’s requirements. Describe the discrepancies that exist.
    6. Filers are encouraged to file their Annual Report to Stockholders, and the CPA Certification Statement using eFiling. Further instructions are found on the Commission’s website at https://www.ferc.gov/ferc-online/ferc-online/frequently-asked-questions-faqs-efilingferc-online.
    7. Federal, State, and Local Governments and other authorized users may obtain additional blank copies of FERC Form 1 and 3-Q free of charge from https://www.ferc.gov/general-information-0/electric-industry-forms.
  4. When to Submit

    FERC Forms 1 and 3-Q must be filed by the following schedule:

    1. FERC Form 1 for each year ending December 31 must be filed by April 18th of the following year (18 CFR § 141.1), and
    2. FERC Form 3-Q for each calendar quarter must be filed within 60 days after the reporting quarter (18 C.F.R. § 141.400).
  5. Where to Send Comments on Public Reporting Burden.

    The public reporting burden for the FERC Form 1 collection of information is estimated to average 1,168 hours per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data-needed, and completing and reviewing the collection of information. The public reporting burden for the FERC Form 3-Q collection of information is estimated to average 168 hours per response.

    Send comments regarding these burden estimates or any aspect of these collections of information, including suggestions for reducing burden, to the Federal Energy Regulatory Commission, 888 First Street NE, Washington, DC 20426 (Attention: Information Clearance Officer); and to the Office of Information and Regulatory Affairs, Office of Management and Budget, Washington, DC 20503 (Attention: Desk Officer for the Federal Energy Regulatory Commission). No person shall be subject to any penalty if any collection of information does not display a valid control number (44 U.S.C. § 3512 (a)).

GENERAL INSTRUCTIONS

  1. Prepare this report in conformity with the Uniform System of Accounts (18 CFR Part 101) (USofA). Interpret all accounting words and phrases in accordance with the USofA.
  2. Enter in whole numbers (dollars or MWH) only, except where otherwise noted. (Enter cents for averages and figures per unit where cents are important. The truncating of cents is allowed except on the four basic financial statements where rounding is required.) The amounts shown on all supporting pages must agree with the amounts entered on the statements that they support. When applying thresholds to determine significance for reporting purposes, use for balance sheet accounts the balances at the end of the current reporting period, and use for statement of income accounts the current year's year to date amounts.
  3. Complete each question fully and accurately, even if it has been answered in a previous report. Enter the word "None" where it truly and completely states the fact.
  4. For any page(s) that is not applicable to the respondent, omit the page(s) and enter "NA," "NONE," or "Not Applicable" in column (d) on the List of Schedules, pages 2 and 3.
  5. Enter the month, day, and year for all dates. Use customary abbreviations. The "Date of Report" included in the header of each page is to be completed only for resubmissions (see VII. below).
  6. Generally, except for certain schedules, all numbers, whether they are expected to be debits or credits, must be reported as positive. Numbers having a sign that is different from the expected sign must be reported by enclosing the numbers in parentheses.
  7. For any resubmissions, please explain the reason for the resubmission in a footnote to the data field.
  8. Do not make references to reports of previous periods/years or to other reports in lieu of required entries, except as specifically authorized.
  9. Wherever (schedule) pages refer to figures from a previous period/year, the figures reported must be based upon those shown by the report of the previous period/year, or an appropriate explanation given as to why the different figures were used.
  10. Schedule specific instructions are found in the applicable taxonomy and on the applicable blank rendered form.
Definitions for statistical classifications used for completing schedules for transmission system reporting are as follows:

FNS - Firm Network Transmission Service for Self. "Firm" means service that can not be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Network Service" is Network Transmission Service as described in Order No. 888 and the Open Access Transmission Tariff. "Self" means the respondent.

FNO - Firm Network Service for Others. "Firm" means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Network Service" is Network Transmission Service as described in Order No. 888 and the Open Access Transmission Tariff.

LFP - for Long-Term Firm Point-to-Point Transmission Reservations. "Long-Term" means one year or longer and” firm" means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Point-to-Point Transmission Reservations" are described in Order No. 888 and the Open Access Transmission Tariff. For all transactions identified as LFP, provide in a footnote the termination date of the contract defined as the earliest date either buyer or seller can unilaterally cancel the contract.

OLF - Other Long-Term Firm Transmission Service. Report service provided under contracts which do not conform to the terms of the Open Access Transmission Tariff. "Long-Term" means one year or longer and “firm” means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. For all transactions identified as OLF, provide in a footnote the termination date of the contract defined as the earliest date either buyer or seller can unilaterally get out of the contract.

SFP - Short-Term Firm Point-to-Point Transmission Reservations. Use this classification for all firm point-to-point transmission reservations, where the duration of each period of reservation is less than one-year.

NF - Non-Firm Transmission Service, where firm means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions.

OS - Other Transmission Service. Use this classification only for those services which can not be placed in the above-mentioned classifications, such as all other service regardless of the length of the contract and service FERC Form. Describe the type of service in a footnote for each entry.

AD - Out-of-Period Adjustments. Use this code for any accounting adjustments or "true-ups" for service provided in prior reporting periods. Provide an explanation in a footnote for each adjustment.

DEFINITIONS
  1. Commission Authorization (Comm. Auth.) -- The authorization of the Federal Energy Regulatory Commission, or any other Commission. Name the commission whose authorization was obtained and give date of the authorization.
  2. Respondent -- The person, corporation, licensee, agency, authority, or other Legal entity or instrumentality in whose behalf the report is made.

EXCERPTS FROM THE LAW

Federal Power Act, 16 U.S.C. § 791a-825r

Sec. 3. The words defined in this section shall have the following meanings for purposes of this Act, to with:

  1. ’Corporation' means any corporation, joint-stock company, partnership, association, business trust, organized group of persons, whether incorporated or not, or a receiver or receivers, trustee or trustees of any of the foregoing. It shall not include 'municipalities, as hereinafter defined;
  2. 'Person' means an individual or a corporation;
  3. 'Licensee, means any person, State, or municipality Licensed under the provisions of section 4 of this Act, and any assignee or successor in interest thereof;
  1. 'municipality means a city, county, irrigation district, drainage district, or other political subdivision or agency of a State competent under the Laws thereof to carry and the business of developing, transmitting, unitizing, or distributing power; ......
  1. "project' means. a complete unit of improvement or development, consisting of a power house, all water conduits, all dams and appurtenant works and structures (including navigation structures) which are a part of said unit, and all storage, diverting, or fore bay reservoirs directly connected therewith, the primary line or lines transmitting power there from to the point of junction with the distribution system or with the interconnected primary transmission system, all miscellaneous structures used and useful in connection with said unit or any part thereof, and all water rights, rights-of-way, ditches, dams, reservoirs, Lands, or interest in Lands the use and occupancy of which are necessary or appropriate in the maintenance and operation of such unit;

"Sec. 4. The Commission is hereby authorized and empowered
  1. 'To make investigations and to collect and record data concerning the utilization of the water 'resources of any region to be developed, the water-power industry and its relation to other industries and to interstate or foreign commerce, and concerning the location, capacity, development costs, and relation to markets of power sites; ... to the extent the Commission may deem necessary or useful for the purposes of this Act."

"Sec. 304.
  1. Every Licensee and every public utility shall file with the Commission such annual and other periodic or special* reports as the Commission may by rules and regulations or other prescribe as necessary or appropriate to assist the Commission in the proper administration of this Act. The Commission may prescribe the manner and FERC Form in which such reports shall be made, and require from such persons specific answers to all questions upon which the Commission may need information. The Commission may require that such reports shall include, among other things, full information as to assets and Liabilities, capitalization, net investment, and reduction thereof, gross receipts, interest due and paid, depreciation, and other reserves, cost of project and other facilities, cost of maintenance and operation of the project and other facilities, cost of renewals and replacement of the project works and other facilities, depreciation, generation, transmission, distribution, delivery, use, and sale of electric energy. The Commission may require any such person to make adequate provision for currently determining such costs and other facts. Such reports shall be made under oath unless the Commission otherwise specifies*.10
"Sec. 309.
  1. The Commission shall have power to perform any and all acts, and to prescribe, issue, make, and rescind such orders, rules and regulations as it may find necessary or appropriate to carry out the provisions of this Act. Among other things, such rules and regulations may define accounting, technical, and trade terms used in this Act; and may prescribe the FERC Form or FERC Forms of all statements, declarations, applications, and reports to be filed with the Commission, the information which they shall contain, and the time within which they shall be field..."

GENERAL PENALTIES

The Commission may assess up to $1 million per day per violation of its rules and regulations. See FPA § 316(a) (2005), 16 U.S.C. § 825o(a).


FERC FORM NO.
1

REPORT OF MAJOR ELECTRIC UTILITIES, LICENSEES AND OTHER
IDENTIFICATION
01 Exact Legal Name of Respondent

NorthWestern Corporation
02 Year/ Period of Report


End of:
2021
/
Q4
03 Previous Name and Date of Change (If name changed during year)

/
04 Address of Principal Office at End of Period (Street, City, State, Zip Code)

3010 West 69th Street Sioux Falls, SD 57108
05 Name of Contact Person

Elaine A. Rich
06 Title of Contact Person

Assistant Controller
07 Address of Contact Person (Street, City, State, Zip Code)

11 East Park Street, Butte, MT 59701
08 Telephone of Contact Person, Including Area Code

(406) 497-2759
09 This Report is An Original / A Resubmission

(1)
An Original

(2)
A Resubmission
10 Date of Report (Mo, Da, Yr)

12/31/2021
Annual Corporate Officer Certification
The undersigned officer certifies that:

I have examined this report and to the best of my knowledge, information, and belief all statements of fact contained in this report are correct statements of the business affairs of the respondent and the financial statements, and other financial information contained in this report, conform in all material respects to the Uniform System of Accounts.

01 Name

Jeff Berzina
02 Title

Controller
03 Signature

Jeff Berzina
04 Date Signed (Mo, Da, Yr)

03/04/2022
Title 18, U.S.C. 1001 makes it a crime for any person to knowingly and willingly to make to any Agency or Department of the United States any false, fictitious or fraudulent statements as to any matter within its jurisdiction.


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
LIST OF SCHEDULES (Electric Utility)

Enter in column (c) the terms "none," "not applicable," or "NA," as appropriate, where no information or amounts have been reported for certain pages. Omit pages where the respondents are "none," "not applicable," or "NA".

Line No.
Title of Schedule
(a)
Reference Page No.
(b)
Remarks
(c)
ScheduleIdentificationAbstract
Identification
1
ScheduleListOfSchedulesAbstract
List of Schedules
2
1
ScheduleGeneralInformationAbstract
General Information
101
2
ScheduleControlOverRespondentAbstract
Control Over Respondent
102
Not Applicable
3
ScheduleCorporationsControlledByRespondentAbstract
Corporations Controlled by Respondent
103
4
ScheduleOfficersAbstract
Officers
104
5
ScheduleDirectorsAbstract
Directors
105
6
ScheduleInformationOnFormulaRatesAbstract
Information on Formula Rates
106
7
ScheduleImportantChangesDuringTheQuarterYearAbstract
Important Changes During the Year
108
8
ScheduleComparativeBalanceSheetAbstract
Comparative Balance Sheet
110
9
ScheduleStatementOfIncomeAbstract
Statement of Income for the Year
114
10
ScheduleRetainedEarningsAbstract
Statement of Retained Earnings for the Year
118
12
ScheduleStatementOfCashFlowsAbstract
Statement of Cash Flows
120
12
ScheduleNotesToFinancialStatementsAbstract
Notes to Financial Statements
122
13
ScheduleStatementOfAccumulatedOtherComprehensiveIncomeAndHedgingActivitiesAbstract
Statement of Accum Other Comp Income, Comp Income, and Hedging Activities
122a
14
ScheduleSummaryOfUtilityPlantAndAccumulatedProvisionsForDepreciationAmortizationAndDepletionAbstract
Summary of Utility Plant & Accumulated Provisions for Dep, Amort & Dep
200
15
ScheduleNuclearFuelMaterialsAbstract
Nuclear Fuel Materials
202
Not Applicable
16
ScheduleElectricPlantInServiceAbstract
Electric Plant in Service
204
17
ScheduleElectricPropertyLeasedToOthersAbstract
Electric Plant Leased to Others
213
Not Applicable
18
ScheduleElectricPlantHeldForFutureUseAbstract
Electric Plant Held for Future Use
214
19
ScheduleConstructionWorkInProgressElectricAbstract
Construction Work in Progress-Electric
216
20
ScheduleAccumulatedProvisionForDepreciationOfElectricUtilityPlantAbstract
Accumulated Provision for Depreciation of Electric Utility Plant
219
21
ScheduleInvestmentsInSubsidiaryCompaniesAbstract
Investment of Subsidiary Companies
224
22
ScheduleMaterialsAndSuppliesAbstract
Materials and Supplies
227
23
ScheduleAllowanceInventoryAbstract
Allowances
228
24
ScheduleExtraordinaryPropertyLossesAbstract
Extraordinary Property Losses
230a
Not Applicable
25
ScheduleUnrecoveredPlantAndRegulatoryStudyCostsAbstract
Unrecovered Plant and Regulatory Study Costs
230b
Not Applicable
26
ScheduleTransmissionServiceAndGenerationInterconnectionStudyCostsAbstract
Transmission Service and Generation Interconnection Study Costs
231
27
ScheduleOtherRegulatoryAssetsAbstract
Other Regulatory Assets
232
28
ScheduleMiscellaneousDeferredDebitsAbstract
Miscellaneous Deferred Debits
233
29
ScheduleAccumulatedDeferredIncomeTaxesAbstract
Accumulated Deferred Income Taxes
234
30
ScheduleCapitalStockAbstract
Capital Stock
250
31
ScheduleOtherPaidInCapitalAbstract
Other Paid-in Capital
253
32
ScheduleCapitalStockExpenseAbstract
Capital Stock Expense
254b
Not Applicable
33
ScheduleLongTermDebtAbstract
Long-Term Debt
256
34
ScheduleReconciliationOfReportedNetIncomeWithTaxableIncomeForFederalIncomeTaxesAbstract
Reconciliation of Reported Net Income with Taxable Inc for Fed Inc Tax
261
35
ScheduleTaxesAccruedPrepaidAndChargedDuringYearDistributionOfTaxesChargedAbstract
Taxes Accrued, Prepaid and Charged During the Year
262
36
ScheduleAccumulatedDeferredInvestmentTaxCreditsAbstract
Accumulated Deferred Investment Tax Credits
266
37
ScheduleOtherDeferredCreditsAbstract
Other Deferred Credits
269
38
ScheduleAccumulatedDeferredIncomeTaxesAcceleratedAmortizationPropertyAbstract
Accumulated Deferred Income Taxes-Accelerated Amortization Property
272
Not Applicable
39
ScheduleAccumulatedDeferredIncomeTaxesOtherPropertyAbstract
Accumulated Deferred Income Taxes-Other Property
274
40
ScheduleAccumulatedDeferredIncomeTaxesOtherAbstract
Accumulated Deferred Income Taxes-Other
276
41
ScheduleOtherRegulatoryLiabilitiesAbstract
Other Regulatory Liabilities
278
42
ScheduleElectricOperatingRevenuesAbstract
Electric Operating Revenues
300
43
ScheduleRegionalTransmissionServiceRevenuesAbstract
Regional Transmission Service Revenues (Account 457.1)
302
Not Applicable
44
ScheduleSalesOfElectricityByRateSchedulesAbstract
Sales of Electricity by Rate Schedules
304
45
ScheduleSalesForResaleAbstract
Sales for Resale
310
46
ScheduleElectricOperationsAndMaintenanceExpensesAbstract
Electric Operation and Maintenance Expenses
320
47
SchedulePurchasedPowerAbstract
Purchased Power
326
48
ScheduleTransmissionOfElectricityForOthersAbstract
Transmission of Electricity for Others
328
49
ScheduleTransmissionOfElectricityByIsoOrRtoAbstract
Transmission of Electricity by ISO/RTOs
331
Not Applicable
50
ScheduleTransmissionOfElectricityByOthersAbstract
Transmission of Electricity by Others
332
51
ScheduleMiscellaneousGeneralExpensesAbstract
Miscellaneous General Expenses-Electric
335
52
ScheduleDepreciationDepletionAndAmortizationAbstract
Depreciation and Amortization of Electric Plant (Account 403, 404, 405)
336
53
ScheduleRegulatoryCommissionExpensesAbstract
Regulatory Commission Expenses
350
54
ScheduleResearchDevelopmentOrDemonstrationExpendituresAbstract
Research, Development and Demonstration Activities
352
Not Applicable
55
ScheduleDistributionOfSalariesAndWagesAbstract
Distribution of Salaries and Wages
354
56
ScheduleCommonUtilityPlantAndExpensesAbstract
Common Utility Plant and Expenses
356
57
ScheduleAmountsIncludedInIsoOrRtoSettlementAbstract
Amounts included in ISO/RTO Settlement Statements
397
58
SchedulePurchasesSalesOfAncillaryServicesAbstract
Purchase and Sale of Ancillary Services
398
59
ScheduleMonthlyTransmissionSystemPeakLoadAbstract
Monthly Transmission System Peak Load
400
60
ScheduleMonthlyIsoOrRtoTransmissionSystemPeakLoadAbstract
Monthly ISO/RTO Transmission System Peak Load
400a
61
ScheduleElectricEnergyAccountAbstract
Electric Energy Account
401a
62
ScheduleMonthlyPeakAndOutputAbstract
Monthly Peaks and Output
401b
63
ScheduleSteamElectricGeneratingPlantStatisticsAbstract
Steam Electric Generating Plant Statistics
402
64
ScheduleHydroelectricGeneratingPlantStatisticsAbstract
Hydroelectric Generating Plant Statistics
406
65
SchedulePumpedStorageGeneratingPlantStatisticsAbstract
Pumped Storage Generating Plant Statistics
408
Not Applicable
66
ScheduleGeneratingPlantStatisticsAbstract
Generating Plant Statistics Pages
410
0
ScheduleEnergyStorageOperationsLargePlantsAbstract
Energy Storage Operations (Large Plants)
414
Not Applicable
67
ScheduleTransmissionLineStatisticsAbstract
Transmission Line Statistics Pages
422
68
ScheduleTransmissionLinesAddedAbstract
Transmission Lines Added During Year
424
Not Applicable
69
ScheduleSubstationsAbstract
Substations
426
70
ScheduleTransactionsWithAssociatedAffiliatedCompaniesAbstract
Transactions with Associated (Affiliated) Companies
429
71
FootnoteDataAbstract
Footnote Data
450
StockholdersReportsAbstract
Stockholders' Reports (check appropriate box)
Stockholders' Reports Check appropriate box:

Two copies will be submitted

No annual report to stockholders is prepared


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
GENERAL INFORMATION
1. Provide name and title of officer having custody of the general corporate books of account and address of office where the general corporate books are kept, and address of office where any other corporate books of account are kept, if different from that where the general corporate books are kept.

Jeff B. Berzina

Controller

3010 West 69th Street Sioux Falls, SD 57108
2. Provide the name of the State under the laws of which respondent is incorporated, and date of incorporation. If incorporated under a special law, give reference to such law. If not incorporated, state that fact and give the type of organization and the date organized.

State of Incorporation:
DE

Date of Incorporation:
1923-11-27

Incorporated Under Special Law:

3. If at any time during the year the property of respondent was held by a receiver or trustee, give (a) name of receiver or trustee, (b) date such receiver or trustee took possession, (c) the authority by which the receivership or trusteeship was created, and (d) date when possession by receiver or trustee ceased.

(a) Name of Receiver or Trustee Holding Property of the Respondent:

(b) Date Receiver took Possession of Respondent Property:

(c) Authority by which the Receivership or Trusteeship was created:

(d) Date when possession by receiver or trustee ceased:
4. State the classes or utility and other services furnished by respondent during the year in each State in which the respondent operated.

Electric and Natural Gas Utility in Montana, South Dakota, and Wyoming (Yellowstone National Park), Gas Utility in Nebraska, Propane in Montana
5. Have you engaged as the principal accountant to audit your financial statements an accountant who is not the principal accountant for your previous year's certified financial statements?
(1)
Yes

(2)
No


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
CONTROL OVER RESPONDENT
1. If any corporation, business trust, or similar organization or a combination of such organizations jointly held control over the respondent at the end of the year, state name of controlling corporation or organization, manner in which control was held, and extent of control. If control was in a holding company organization, show the chain of ownership or control to the main parent company or organization. If control was held by a trustee(s), state name of trustee(s), name of beneficiary or beneficiaries for whom trust was maintained, and purpose of the trust.
Not Applicable


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
CORPORATIONS CONTROLLED BY RESPONDENT
  1. Report below the names of all corporations, business trusts, and similar organizations, controlled directly or indirectly by respondent at any time during the year. If control ceased prior to end of year, give particulars (details) in a footnote.
  2. If control was by other means than a direct holding of voting rights, state in a footnote the manner in which control was held, naming any intermediaries involved.
  3. If control was held jointly with one or more other interests, state the fact in a footnote and name the other interests.
Definitions
  1. See the Uniform System of Accounts for a definition of control.
  2. Direct control is that which is exercised without interposition of an intermediary.
  3. Indirect control is that which is exercised by the interposition of an intermediary which exercises direct control.
  4. Joint control is that in which neither interest can effectively control or direct action without the consent of the other, as where the voting control is equally divided between two holders, or each party holds a veto power over the other. Joint control may exist by mutual agreement or understanding between two or more parties who together have control within the meaning of the definition of control in the Uniform System of Accounts, regardless of the relative voting rights of each party.
Line No.
NameOfCompanyControlledByRespondent
Name of Company Controlled
(a)
CompanyControlledByRespondentKindOfBusinessDescription
Kind of Business
(b)
VotingStockOwnedByRespondentPercentage
Percent Voting Stock Owned
(c)
FootnoteReferences
Footnote Ref.
(d)
1
Direct Subsidiaries:
2
Canadian-Montana Pipe Line Corporation
Owns natural gas pipeline
100
3
Clarkfork and Blackfoot, LLC
Owned a former hydro facility in Montana
100
4
NorthWestern Services, LLC
Non-regulated natural gas marketing in SD/NE
100
5
Risk Partners Assurance, Ltd.
Captive insurance company
100
6
Lodge Creek Pipelines, LLC
Natural gas gathering system
100
7
Willow Creek Gathering, LLC
Natural gas gathering system
100
8
Havre Pipeline Company, LLC
Natural gas transmission and gathering system
96
9
NorthWestern Energy Solutions, Inc.
Non-regulated customer services
100


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
OFFICERS
  1. Report below the name, title and salary for each executive officer whose salary is $50,000 or more. An "executive officer" of a respondent includes its president, secretary, treasurer, and vice president in charge of a principal business unit, division or function (such as sales, administration or finance), and any other person who performs similar policy making functions.
  2. If a change was made during the year in the incumbent of any position, show name and total remuneration of the previous incumbent, and the date the change in incumbency was made.
Line No.
OfficerTitle
Title
(a)
OfficerName
Name of Officer
(b)
OfficerSalary
Salary for Year
(c)
DateOfficerIncumbencyStarted
Date Started in Period
(d)
DateOfficerIncumbencyEnded
Date Ended in Period
(e)
1
(a)
Chief Executive Officer
Robert Rowe
674,138
2
(b)
President, Chief Operating Officer
Brian Bird
494,774
2021-02-15
3
(c)
Vice President, Chief Financial Officer
Crystal Lail
362,307
2021-02-15
4
Vice President, General Counsel and Regulatory and Federal Government Affairs
Heather Grahame
439,769
5
Vice President, Distribution
Curtis Pohl
316,847
6
Vice President, Transmission
Michael Cashell
299,523
7
Vice President, Customer Care, Communications, and Human Resources
Bobbi Schroeppel
300,832
8
Vice, President, Supply and Montana Government Affairs
John Hines
305,021
9
Vice President, Technology
Jeanne Vold
246,398
2021-02-15


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: OfficerTitle
Effective February 15, 2021, Bob Rowe served in the role of Chief Executive Officer, formerly President and Chief Executive Officer. From January 1, 2021 through February 14, 2021, Bob Rowe's salary was $687,206.
(b) Concept: OfficerTitle
Effective February 15, 2021, Brian Bird served as Vice President and Chief Operating Officer, formerly serving as Chief Financial Officer. From January 1, 2021 through February 14, 2021, Brian Bird's salary was $475,329.
(c) Concept: OfficerTitle
Effective February 15, 2021, Crystal Lail served as Vice President and Chief Financial Officer, formerly serving as Vice President and Chief Accounting Officer. From January 1, 2021 through February 14, 2021, Crystal Lail's salary was $284,849.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
DIRECTORS
  1. Report below the information called for concerning each director of the respondent who held office at any time during the year. Include in column (a), name and abbreviated titles of the directors who are officers of the respondent.
  2. Provide the principle place of business in column (b), designate members of the Executive Committee in column (c), and the Chairman of the Executive Committee in column (d).
Line No.
NameAndTitleOfDirector
Name (and Title) of Director
(a)
PrincipalBusinessAddress
Principal Business Address
(b)
MemberOfTheExecutiveCommittee
Member of the Executive Committee
(c)
ChairmanOfTheExecutiveCommittee
Chairman of the Executive Committee
(d)
1
Dana J. Dykhouse
Sioux Falls, South Dakota
false
false
2
Anthony T. Clark
Ashburn, Virginia
false
false
3
Jan R. Horsfall
Colorado Springs, Colorado
false
false
4
Britt E. Ide
Bozeman, Montana
false
false
5
Robert C. Rowe, Chief Exececutive Officer
Helena, Montana
false
false
6
Linda G. Sullivan
Moneta, Virginia
false
false
7
Mahvash Yazdi
Rancho Palos Verdes, California
false
false
8
Jeffrey W. Yingling
Kneilworth, Illinois
false
false
9
(a)
Stephen P. Adik
Valparaiso, Indiana
false
false
10
(b)
Julia L. Johnson
Windermere, Florida
false
false


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: NameAndTitleOfDirector
On April 22, 2021, following the 2021 annual stockholder's meeting, both Stephen Adik and Julia Johnson retired and were no longer directors of NorthWestern Energy.
(b) Concept: NameAndTitleOfDirector
On April 22, 2021, following the 2021 annual stockholder's meeting, both Stephen Adik and Julia Johnson retired and were no longer directors of NorthWestern Energy.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
INFORMATION ON FORMULA RATES
Does the respondent have formula rates?
Yes

No
  1. Please list the Commission accepted formula rates including FERC Rate Schedule or Tariff Number and FERC proceeding (i.e. Docket No) accepting the rate(s) or changes in the accepted rate.
Line No.
RateScheduleTariffNumber
FERC Rate Schedule or Tariff Number
(a)
ProceedingDocketNumber
FERC Proceeding
(b)
1
Addendum 27 to Attachment H of Southwest Power Pool Open Access Transmission Tariff
ER20-1090-000 and ER20-1961-001 (not consolidated)
2
Addendum 27 to Attachment H of Southwest Power Pool Open Access Transmission Tariff
ER21-2290-000
3
Montana OATT, Attachment O, Formula Rate Protocols and Template
ER19-1756-001


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
INFORMATION ON FORMULA RATES - FERC Rate Schedule/Tariff Number FERC Proceeding
Does the respondent file with the Commission annual (or more frequent) filings containing the inputs to the formula rate(s)?
Yes

No
  1. If yes, provide a listing of such filings as contained on the Commission's eLibrary website.
Line No.
AccessionNumber
Accession No.
(a)
DocumentDate
Document Date / Filed Date
(b)
DocketNumber
Docket No.
(c)
DescriptionOfFiling
Description
(d)
RateScheduleTariffNumber
Formula Rate FERC Rate Schedule Number or Tariff Number
(e)
1
11/16/2021
ER22-412-000
Annual Informational Attachment H Filing of NorthWestern Corporation (South Dakota) (Rate Year 2021)
Addendum 27 to Attachment H of Southwest Power Pool Open Access Transmission Tariff
2
11/12/2021
ER22-407-000
Informational Filing of June 1, 2021, to May 31, 2022, Formula Rate Annual Update of NorthWestern Corporation (Montana)
Montana OATT, Attachment O, Formula Rate Protocols and Template


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
INFORMATION ON FORMULA RATES - Formula Rate Variances
  1. If a respondent does not submit such filings then indicate in a footnote to the applicable Form 1 schedule where formula rate inputs differ from amounts reported in the Form 1.
  2. The footnote should provide a narrative description explaining how the "rate" (or billing) was derived if different from the reported amount in the Form 1.
  3. The footnote should explain amounts excluded from the ratebase or where labor or other allocation factors, operating expenses, or other items impacting formula rate inputs differ from amounts reported in Form 1 schedule amounts.
  4. Where the Commission has provided guidance on formula rate inputs, the specific proceeding should be noted in the footnote.
Line No.
PageNumberOfFormulaRateVariances
Page No(s).
(a)
ScheduleOfFormulaRateVariances
Schedule
(b)
ColumnOfFormulaRateVariances
Column
(c)
LineNumberOfFormulaRateVariances
Line No.
(d)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
IMPORTANT CHANGES DURING THE QUARTER/YEAR

Give particulars (details) concerning the matters indicated below. Make the statements explicit and precise, and number them in accordance with the inquiries. Each inquiry should be answered. Enter "none," "not applicable," or "NA" where applicable. If information which answers an inquiry is given elsewhere in the report, make a reference to the schedule in which it appears.

  1. Changes in and important additions to franchise rights: Describe the actual consideration given therefore and state from whom the franchise rights were acquired. If acquired without the payment of consideration, state that fact.
  2. Acquisition of ownership in other companies by reorganization, merger, or consolidation with other companies: Give names of companies involved, particulars concerning the transactions, name of the Commission authorizing the transaction, and reference to Commission authorization.
  3. Purchase or sale of an operating unit or system: Give a brief description of the property, and of the transactions relating thereto, and reference to Commission authorization, if any was required. Give date journal entries called for by the Uniform System of Accounts were submitted to the Commission.
  4. Important leaseholds (other than leaseholds for natural gas lands) that have been acquired or given, assigned or surrendered: Give effective dates, lengths of terms, names of parties, rents, and other condition. State name of Commission authorizing lease and give reference to such authorization.
  5. Important extension or reduction of transmission or distribution system: State territory added or relinquished and date operations began or ceased and give reference to Commission authorization, if any was required. State also the approximate number of customers added or lost and approximate annual revenues of each class of service. Each natural gas company must also state major new continuing sources of gas made available to it from purchases, development, purchase contract or otherwise, giving location and approximate total gas volumes available, period of contracts, and other parties to any such arrangements, etc.
  6. Obligations incurred as a result of issuance of securities or assumption of liabilities or guarantees including issuance of short-term debt and commercial paper having a maturity of one year or less. Give reference to FERC or State Commission authorization, as appropriate, and the amount of obligation or guarantee.
  7. Changes in articles of incorporation or amendments to charter: Explain the nature and purpose of such changes or amendments.
  8. State the estimated annual effect and nature of any important wage scale changes during the year.
  9. State briefly the status of any materially important legal proceedings pending at the end of the year, and the results of any such proceedings culminated during the year.
  10. Describe briefly any materially important transactions of the respondent not disclosed elsewhere in this report in which an officer, director, security holder reported on Pages 104 or 105 of the Annual Report Form No. 1, voting trustee, associated company or known associate of any of these persons was a party or in which any such person had a material interest.
  11. (Reserved.)
  12. If the important changes during the year relating to the respondent company appearing in the annual report to stockholders are applicable in every respect and furnish the data required by Instructions 1 to 11 above, such notes may be included on this page.
  13. Describe fully any changes in officers, directors, major security holders and voting powers of the respondent that may have occurred during the reporting period.
  14. In the event that the respondent participates in a cash management program(s) and its proprietary capital ratio is less than 30 percent please describe the significant events or transactions causing the proprietary capital ratio to be less than 30 percent, and the extent to which the respondent has amounts loaned or money advanced to its parent, subsidiary, or affiliated companies through a cash management program(s). Additionally, please describe plans, if any to regain at least a 30 percent proprietary ratio.
1) None
2) None
3) None
4) None
5) None
6) See Note 12, "Long Term Debt", FERC Order ES19-36-000 and MPSC Order Number 7691 Docket Number D2019.08.046. Further, see Note 18, "Common Stock", for details regarding the issuance of securities.
7) None
8) None
9) See Note 19, "Commitments and Contingencies".
10) None
12) None
13) The board of directors approved the promotion of Brian Bird to President and Chief Operating officer effective February 15, 2021. As President and Chief Operating Officer, Brian will oversee our operations, including electric and natural gas transmission and distribution, energy supply, customer care, and technology. At the same time, Crystal Lail was also approved as the Vice President and Chief Financial Officer. Crystal was formerly the Vice President and Chief Accounting officer. Further, the board of directors approved Jeanne Vold as Vice President - Technology, reflecting the ever-increasing importance of technology for our business.In addition to these appointments, two directors, Stephen Adik and Julia Johnson, each retired from the board of directors during the year.
14) NA


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
COMPARATIVE BALANCE SHEET (ASSETS AND OTHER DEBITS)
Line No.
Title of Account
(a)
Ref. Page No.
(b)
Current Year End of Quarter/Year Balance
(c)
Prior Year End Balance 12/31
(d)
1
UtilityPlantAbstract
UTILITY PLANT
2
UtilityPlant
Utility Plant (101-106, 114)
200
7,084,086,086
6,797,205,052
3
ConstructionWorkInProgress
Construction Work in Progress (107)
200
284,729,122
166,454,010
4
UtilityPlantAndConstructionWorkInProgress
TOTAL Utility Plant (Enter Total of lines 2 and 3)
7,368,815,208
6,963,659,062
5
AccumulatedProvisionForDepreciationAmortizationAndDepletionOfPlantUtility
(Less) Accum. Prov. for Depr. Amort. Depl. (108, 110, 111, 115)
200
2,648,396,212
2,527,092,610
6
UtilityPlantNet
Net Utility Plant (Enter Total of line 4 less 5)
4,720,418,996
4,436,566,452
7
NuclearFuelInProcessOfRefinementConversionEnrichmentAndFabrication
Nuclear Fuel in Process of Ref., Conv., Enrich., and Fab. (120.1)
202
8
NuclearFuelMaterialsAndAssembliesStockAccountMajorOnly
Nuclear Fuel Materials and Assemblies-Stock Account (120.2)
9
NuclearFuelAssembliesInReactorMajorOnly
Nuclear Fuel Assemblies in Reactor (120.3)
10
SpentNuclearFuelMajorOnly
Spent Nuclear Fuel (120.4)
11
NuclearFuelUnderCapitalLeases
Nuclear Fuel Under Capital Leases (120.6)
12
AccumulatedProvisionForAmortizationOfNuclearFuelAssemblies
(Less) Accum. Prov. for Amort. of Nucl. Fuel Assemblies (120.5)
202
13
NuclearFuelNet
Net Nuclear Fuel (Enter Total of lines 7-11 less 12)
14
UtilityPlantAndNuclearFuelNet
Net Utility Plant (Enter Total of lines 6 and 13)
4,720,418,996
4,436,566,452
15
OtherElectricPlantAdjustments
Utility Plant Adjustments (116)
357,585,527
357,585,527
16
GasStoredUndergroundNoncurrent
Gas Stored Underground - Noncurrent (117)
36,190,017
36,196,864
17
OtherPropertyAndInvestmentsAbstract
OTHER PROPERTY AND INVESTMENTS
18
NonutilityProperty
Nonutility Property (121)
686,805
686,805
19
AccumulatedProvisionForDepreciationAndAmortizationOfNonutilityProperty
(Less) Accum. Prov. for Depr. and Amort. (122)
29,270
29,180
20
InvestmentInAssociatedCompanies
Investments in Associated Companies (123)
21
InvestmentInSubsidiaryCompanies
Investment in Subsidiary Companies (123.1)
224
24,377,535
23,732,943
23
NoncurrentPortionOfAllowances
Noncurrent Portion of Allowances
228
24
OtherInvestments
Other Investments (124)
18,262,019
45,234,617
25
SinkingFunds
Sinking Funds (125)
26
DepreciationFund
Depreciation Fund (126)
27
AmortizationFundFederal
Amortization Fund - Federal (127)
28
OtherSpecialFunds
Other Special Funds (128)
250,000
29
SpecialFunds
Special Funds (Non Major Only) (129)
30
DerivativeInstrumentAssetsLongTerm
Long-Term Portion of Derivative Assets (175)
31
DerivativeInstrumentAssetsHedgesLongTerm
Long-Term Portion of Derivative Assets - Hedges (176)
32
OtherPropertyAndInvestments
TOTAL Other Property and Investments (Lines 18-21 and 23-31)
43,297,089
69,875,185
33
CurrentAndAccruedAssetsAbstract
CURRENT AND ACCRUED ASSETS
34
CashAndWorkingFunds
Cash and Working Funds (Non-major Only) (130)
35
Cash
Cash (131)
2,300,750
5,454,203
36
SpecialDeposits
Special Deposits (132-134)
14,658,170
9,670,293
37
WorkingFunds
Working Fund (135)
23,250
22,950
38
TemporaryCashInvestments
Temporary Cash Investments (136)
39
NotesReceivable
Notes Receivable (141)
40
CustomerAccountsReceivable
Customer Accounts Receivable (142)
86,846,850
73,728,730
41
OtherAccountsReceivable
Other Accounts Receivable (143)
8,867,792
14,106,165
42
AccumulatedProvisionForUncollectibleAccountsCredit
(Less) Accum. Prov. for Uncollectible Acct.-Credit (144)
2,319,115
5,609,532
43
NotesReceivableFromAssociatedCompanies
Notes Receivable from Associated Companies (145)
44
AccountsReceivableFromAssociatedCompanies
Accounts Receivable from Assoc. Companies (146)
2,818,214
1,752,345
45
FuelStock
Fuel Stock (151)
227
7,509,623
6,561,463
46
FuelStockExpensesUndistributed
Fuel Stock Expenses Undistributed (152)
227
47
Residuals
Residuals (Elec) and Extracted Products (153)
227
48
PlantMaterialsAndOperatingSupplies
Plant Materials and Operating Supplies (154)
227
53,538,725
43,691,819
49
Merchandise
Merchandise (155)
227
50
OtherMaterialsAndSupplies
Other Materials and Supplies (156)
227
51
NuclearMaterialsHeldForSale
Nuclear Materials Held for Sale (157)
202/227
52
AllowanceInventoryAndWithheld
Allowances (158.1 and 158.2)
228
53
NoncurrentPortionOfAllowances
(Less) Noncurrent Portion of Allowances
228
54
StoresExpenseUndistributed
Stores Expense Undistributed (163)
227
55
GasStoredCurrent
Gas Stored Underground - Current (164.1)
18,828,613
10,010,097
56
LiquefiedNaturalGasStoredAndHeldForProcessing
Liquefied Natural Gas Stored and Held for Processing (164.2-164.3)
57
Prepayments
Prepayments (165)
(a)
22,690,392
15,375,451
58
AdvancesForGas
Advances for Gas (166-167)
59
InterestAndDividendsReceivable
Interest and Dividends Receivable (171)
60
RentsReceivable
Rents Receivable (172)
54,488
49,263
61
AccruedUtilityRevenues
Accrued Utility Revenues (173)
98,149,252
80,492,128
62
MiscellaneousCurrentAndAccruedAssets
Miscellaneous Current and Accrued Assets (174)
258,105
194,031
63
DerivativeInstrumentAssets
Derivative Instrument Assets (175)
64
DerivativeInstrumentAssetsLongTerm
(Less) Long-Term Portion of Derivative Instrument Assets (175)
65
DerivativeInstrumentAssetsHedges
Derivative Instrument Assets - Hedges (176)
66
DerivativeInstrumentAssetsHedgesLongTerm
(Less) Long-Term Portion of Derivative Instrument Assets - Hedges (176)
67
CurrentAndAccruedAssets
Total Current and Accrued Assets (Lines 34 through 66)
314,225,109
255,499,406
68
DeferredDebitsAbstract
DEFERRED DEBITS
69
UnamortizedDebtExpense
Unamortized Debt Expenses (181)
11,120,970
13,376,263
70
ExtraordinaryPropertyLosses
Extraordinary Property Losses (182.1)
230a
71
UnrecoveredPlantAndRegulatoryStudyCosts
Unrecovered Plant and Regulatory Study Costs (182.2)
230b
72
OtherRegulatoryAssets
Other Regulatory Assets (182.3)
232
685,148,784
712,384,890
73
PreliminarySurveyAndInvestigationCharges
Prelim. Survey and Investigation Charges (Electric) (183)
2,286,180
74
PreliminaryNaturalGasSurveyAndInvestigationChargesAndOtherPreliminarySurveyAndInvestigationCharges
Preliminary Natural Gas Survey and Investigation Charges 183.1)
75
OtherPreliminarySurveyAndInvestigationCharges
Other Preliminary Survey and Investigation Charges (183.2)
76
ClearingAccounts
Clearing Accounts (184)
4,169
3,634
77
TemporaryFacilities
Temporary Facilities (185)
78
MiscellaneousDeferredDebits
Miscellaneous Deferred Debits (186)
233
8,602,501
7,542,918
79
DeferredLossesFromDispositionOfUtilityPlant
Def. Losses from Disposition of Utility Plt. (187)
80
ResearchDevelopmentAndDemonstrationExpenditures
Research, Devel. and Demonstration Expend. (188)
352
81
UnamortizedLossOnReacquiredDebt
Unamortized Loss on Reaquired Debt (189)
(b)
25,635,857
28,350,312
82
AccumulatedDeferredIncomeTaxes
Accumulated Deferred Income Taxes (190)
234
160,914,104
170,834,539
83
UnrecoveredPurchasedGasCosts
Unrecovered Purchased Gas Costs (191)
94,663,379
5,905,571
84
DeferredDebits
Total Deferred Debits (lines 69 through 83)
986,089,764
940,684,307
85
AssetsAndOtherDebits
TOTAL ASSETS (lines 14-16, 32, 67, and 84)
6,457,806,502
6,096,407,741


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: Prepayments
South Dakota Operations Prepayments (165) are $14,201,612 and $12,840,333 for 2021 and 2020, respectively.

Montana Operations Prepayments (165) are $8,488,780 and $2,535,118 for 2021 and 2020, respectively.
(b) Concept: UnamortizedLossOnReacquiredDebt
Montana Operations Unamortized Loss on Reacquired Debt (189) is $22,530,850 and $24,241,258 for 2021 and 2020, respectively.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
COMPARATIVE BALANCE SHEET (LIABILITIES AND OTHER CREDITS)
Line No.
Title of Account
(a)
Ref. Page No.
(b)
Current Year End of Quarter/Year Balance
(c)
Prior Year End Balance 12/31
(d)
1
ProprietaryCapitalAbstract
PROPRIETARY CAPITAL
2
CommonStockIssued
Common Stock Issued (201)
250
576,063
541,448
3
PreferredStockIssued
Preferred Stock Issued (204)
250
4
CapitalStockSubscribed
Capital Stock Subscribed (202, 205)
5
StockLiabilityForConversion
Stock Liability for Conversion (203, 206)
6
PremiumOnCapitalStock
Premium on Capital Stock (207)
7
OtherPaidInCapital
Other Paid-In Capital (208-211)
253
1,716,226,995
1,513,785,477
8
InstallmentsReceivedOnCapitalStock
Installments Received on Capital Stock (212)
252
9
DiscountOnCapitalStock
(Less) Discount on Capital Stock (213)
254
10
CapitalStockExpense
(Less) Capital Stock Expense (214)
254b
11
RetainedEarnings
Retained Earnings (215, 215.1, 216)
118
725,880,305
666,673,846
12
UnappropriatedUndistributedSubsidiaryEarnings
Unappropriated Undistributed Subsidiary Earnings (216.1)
118
446,074
1,295,383
13
ReacquiredCapitalStock
(Less) Reaquired Capital Stock (217)
250
98,248,245
98,075,421
14
NoncorporateProprietorship
Noncorporate Proprietorship (Non-major only) (218)
15
AccumulatedOtherComprehensiveIncome
Accumulated Other Comprehensive Income (219)
122(a)(b)
5,167,596
5,126,145
16
ProprietaryCapital
Total Proprietary Capital (lines 2 through 15)
2,339,713,596
2,079,094,588
17
LongTermDebtAbstract
LONG-TERM DEBT
18
Bonds
Bonds (221)
256
2,179,660,000
2,079,660,000
19
ReacquiredBonds
(Less) Reaquired Bonds (222)
256
20
AdvancesFromAssociatedCompanies
Advances from Associated Companies (223)
256
21
OtherLongTermDebt
Other Long-Term Debt (224)
256
373,000,000
248,976,900
22
UnamortizedPremiumOnLongTermDebt
Unamortized Premium on Long-Term Debt (225)
23
UnamortizedDiscountOnLongTermDebtDebit
(Less) Unamortized Discount on Long-Term Debt-Debit (226)
61,389
24
LongTermDebt
Total Long-Term Debt (lines 18 through 23)
2,552,598,611
2,328,636,900
25
OtherNoncurrentLiabilitiesAbstract
OTHER NONCURRENT LIABILITIES
26
ObligationsUnderCapitalLeaseNoncurrent
Obligations Under Capital Leases - Noncurrent (227)
12,829,411
16,379,639
27
AccumulatedProvisionForPropertyInsurance
Accumulated Provision for Property Insurance (228.1)
28
AccumulatedProvisionForInjuriesAndDamages
Accumulated Provision for Injuries and Damages (228.2)
(a)
7,061,829
6,050,644
29
AccumulatedProvisionForPensionsAndBenefits
Accumulated Provision for Pensions and Benefits (228.3)
(b)
6,434,213
10,240,902
30
AccumulatedMiscellaneousOperatingProvisions
Accumulated Miscellaneous Operating Provisions (228.4)
88,530,057
106,746,764
31
AccumulatedProvisionForRateRefunds
Accumulated Provision for Rate Refunds (229)
10,712,124
32
LongTermPortionOfDerivativeInstrumentLiabilities
Long-Term Portion of Derivative Instrument Liabilities
33
LongTermPortionOfDerivativeInstrumentLiabilitiesHedges
Long-Term Portion of Derivative Instrument Liabilities - Hedges
34
AssetRetirementObligations
Asset Retirement Obligations (230)
40,747,410
45,355,157
35
OtherNoncurrentLiabilities
Total Other Noncurrent Liabilities (lines 26 through 34)
155,602,920
195,485,230
36
CurrentAndAccruedLiabilitiesAbstract
CURRENT AND ACCRUED LIABILITIES
37
NotesPayable
Notes Payable (231)
100,000,000
38
AccountsPayable
Accounts Payable (232)
(c)
120,452,816
104,724,988
39
NotesPayableToAssociatedCompanies
Notes Payable to Associated Companies (233)
40
AccountsPayableToAssociatedCompanies
Accounts Payable to Associated Companies (234)
3,931,236
3,622,020
41
CustomerDeposits
Customer Deposits (235)
8,573,478
6,000,316
42
TaxesAccrued
Taxes Accrued (236)
262
(d)
79,488,912
84,528,451
43
InterestAccrued
Interest Accrued (237)
18,567,598
18,073,738
44
DividendsDeclared
Dividends Declared (238)
45
MaturedLongTermDebt
Matured Long-Term Debt (239)
46
MaturedInterest
Matured Interest (240)
47
TaxCollectionsPayable
Tax Collections Payable (241)
2,178,547
1,432,362
48
MiscellaneousCurrentAndAccruedLiabilities
Miscellaneous Current and Accrued Liabilities (242)
(e)
63,691,637
75,300,662
49
ObligationsUnderCapitalLeasesCurrent
Obligations Under Capital Leases-Current (243)
4,012,828
3,912,103
50
DerivativesInstrumentLiabilities
Derivative Instrument Liabilities (244)
51
LongTermPortionOfDerivativeInstrumentLiabilities
(Less) Long-Term Portion of Derivative Instrument Liabilities
52
DerivativeInstrumentLiabilitiesHedges
Derivative Instrument Liabilities - Hedges (245)
53
LongTermPortionOfDerivativeInstrumentLiabilitiesHedges
(Less) Long-Term Portion of Derivative Instrument Liabilities-Hedges
54
CurrentAndAccruedLiabilities
Total Current and Accrued Liabilities (lines 37 through 53)
300,897,052
397,594,640
55
DeferredCreditsAbstract
DEFERRED CREDITS
56
CustomerAdvancesForConstruction
Customer Advances for Construction (252)
(f)
80,779,904
65,186,426
57
AccumulatedDeferredInvestmentTaxCredits
Accumulated Deferred Investment Tax Credits (255)
266
517,968
278,674
58
DeferredGainsFromDispositionOfUtilityPlant
Deferred Gains from Disposition of Utility Plant (256)
59
OtherDeferredCredits
Other Deferred Credits (253)
269
173,125,630
199,645,159
60
OtherRegulatoryLiabilities
Other Regulatory Liabilities (254)
278
185,656,769
187,832,431
61
UnamortizedGainOnReacquiredDebt
Unamortized Gain on Reaquired Debt (257)
62
AccumulatedDeferredIncomeTaxesAcceleratedAmortizationProperty
Accum. Deferred Income Taxes-Accel. Amort.(281)
272
63
AccumulatedDeferredIncomeTaxesOtherProperty
Accum. Deferred Income Taxes-Other Property (282)
431,345,154
416,897,664
64
AccumulatedDeferredIncomeTaxesOther
Accum. Deferred Income Taxes-Other (283)
237,568,898
225,756,029
65
DeferredCredits
Total Deferred Credits (lines 56 through 64)
1,108,994,323
1,095,596,383
66
LiabilitiesAndOtherCredits
TOTAL LIABILITIES AND STOCKHOLDER EQUITY (lines 16, 24, 35, 54 and 65)
6,457,806,502
6,096,407,741


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: AccumulatedProvisionForInjuriesAndDamages
South Dakota Operations Provision for Injuries and Damages (228.2) are $570,311 and $581,272 for 2021 and 2020, respectively.
Montana Operations Provision for Injuries and Damages (228.2) are $6,491,517 and $5,469,372 for 2021 and 2020, respectively.
(b) Concept: AccumulatedProvisionForPensionsAndBenefits
Montana Operations Accumulated Provision for Pensions and Benefits (228.3) are $3,478,599 and $7,096,957 for 2021 and 2020, respectively.
(c) Concept: AccountsPayable
Montana Operations unfunded reserves for Accounts Payable (232) are $2,432,071 and $2,338,154 for 2021 and 2020, respectively
(d) Concept: TaxesAccrued
Montana Operations unfunded reserves for Taxes Accrued (236) are $79,266,640 and $82,835,340 for 2021 and 2020, respectively.
(e) Concept: MiscellaneousCurrentAndAccruedLiabilities
Montana Operations Miscellaneous Current and Accrued Liabilities (242) are $46,613,454 and $60,393,837 for 2021 and 2020, respectively.

Montana Operations unfunded reserve for Miscellaneous Current and Accrued Liabilities (242) are $19,780,351 and $17,592,544 for 2021 and 2020, respectively.
(f) Concept: CustomerAdvancesForConstruction
Montana Operations Customer Advances for Construction (252) are $80,779,904 and $65,186,426 for 2021 and 2020, respectively.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
STATEMENT OF INCOME

Quarterly

  1. Report in column (c) the current year to date balance. Column (c) equals the total of adding the data in column (g) plus the data in column (i) plus the data in column (k). Report in column (d) similar data for the previous year. This information is reported in the annual filing only.
  2. Enter in column (e) the balance for the reporting quarter and in column (f) the balance for the same three month period for the prior year.
  3. Report in column (g) the quarter to date amounts for electric utility function; in column (i) the quarter to date amounts for gas utility, and in column (k) the quarter to date amounts for other utility function for the current year quarter.
  4. Report in column (h) the quarter to date amounts for electric utility function; in column (j) the quarter to date amounts for gas utility, and in column (l) the quarter to date amounts for other utility function for the prior year quarter.
  5. If additional columns are needed, place them in a footnote.

Annual or Quarterly if applicable

  1. Do not report fourth quarter data in columns (e) and (f)
  2. Report amounts for accounts 412 and 413, Revenues and Expenses from Utility Plant Leased to Others, in another utility column in a similar manner to a utility department. Spread the amount(s) over Lines 2 thru 26 as appropriate. Include these amounts in columns (c) and (d) totals.
  3. Report amounts in account 414, Other Utility Operating Income, in the same manner as accounts 412 and 413 above.
  4. Use page 122 for important notes regarding the statement of income for any account thereof.
  5. Give concise explanations concerning unsettled rate proceedings where a contingency exists such that refunds of a material amount may need to be made to the utility's customers or which may result in material refund to the utility with respect to power or gas purchases. State for each year effected the gross revenues or costs to which the contingency relates and the tax effects together with an explanation of the major factors which affect the rights of the utility to retain such revenues or recover amounts paid with respect to power or gas purchases.
  6. Give concise explanations concerning significant amounts of any refunds made or received during the year resulting from settlement of any rate proceeding affecting revenues received or costs incurred for power or gas purchases, and a summary of the adjustments made to balance sheet, income, and expense accounts.
  7. If any notes appearing in the report to stockholders are applicable to the Statement of Income, such notes may be included at page 122.
  8. Enter on page 122 a concise explanation of only those changes in accounting methods made during the year which had an effect on net income, including the basis of allocations and apportionments from those used in the preceding year. Also, give the appropriate dollar effect of such changes.
  9. Explain in a footnote if the previous year's/quarter's figures are different from that reported in prior reports.
  10. If the columns are insufficient for reporting additional utility departments, supply the appropriate account titles report the information in a footnote to this schedule.
Line No.
Title of Account
(a)
(Ref.) Page No.
(b)
Total Current Year to Date Balance for Quarter/Year
(c)
Total Prior Year to Date Balance for Quarter/Year
(d)
Current 3 Months Ended - Quarterly Only - No 4th Quarter
(e)
Prior 3 Months Ended - Quarterly Only - No 4th Quarter
(f)
Electric Utility Current Year to Date (in dollars)
(g)
Electric Utility Previous Year to Date (in dollars)
(h)
Gas Utiity Current Year to Date (in dollars)
(i)
Gas Utility Previous Year to Date (in dollars)
(j)
Other Utility Current Year to Date (in dollars)
(k)
Other Utility Previous Year to Date (in dollars)
(l)
1
UtilityOperatingIncomeAbstract
UTILITY OPERATING INCOME
2
OperatingRevenues
Operating Revenues (400)
300
1,368,686,794
1,228,777,461
1,062,759,806
978,861,187
305,267,815
249,195,804
659,173
720,470
3
OperatingExpensesAbstract
Operating Expenses
4
OperationExpense
Operation Expenses (401)
320
673,030,656
590,236,007
484,092,963
454,899,521
188,421,735
134,735,433
515,958
601,053
5
MaintenanceExpense
Maintenance Expenses (402)
320
55,652,718
51,587,104
48,389,356
44,400,597
7,196,383
7,142,124
66,979
44,383
6
DepreciationExpense
Depreciation Expense (403)
336
159,377,975
151,804,069
132,150,598
125,838,950
27,186,673
25,924,415
40,704
40,704
7
DepreciationExpenseForAssetRetirementCosts
Depreciation Expense for Asset Retirement Costs (403.1)
336
8
AmortizationAndDepletionOfUtilityPlant
Amort. & Depl. of Utility Plant (404-405)
336
12,550,043
12,297,122
6,526,947
6,180,974
6,023,096
6,116,148
9
AmortizationOfElectricPlantAcquisitionAdjustments
Amort. of Utility Plant Acq. Adj. (406)
336
15,101,772
15,101,772
(b)
15,948,277
15,948,277
846,505
846,505
10
AmortizationOfPropertyLossesUnrecoveredPlantAndRegulatoryStudyCosts
Amort. Property Losses, Unrecov Plant and Regulatory Study Costs (407)
11
AmortizationOfConversionExpenses
Amort. of Conversion Expenses (407.2)
12
RegulatoryDebits
Regulatory Debits (407.3)
16,821,377
4,019,412
13,407,216
1,854,084
3,414,161
2,165,328
13
RegulatoryCredits
(Less) Regulatory Credits (407.4)
21,124,815
19,872,017
15,887,779
14,549,440
5,237,036
5,322,577
14
TaxesOtherThanIncomeTaxesUtilityOperatingIncome
Taxes Other Than Income Taxes (408.1)
262
181,946,099
187,785,976
141,143,613
146,669,949
40,742,717
41,052,788
59,769
63,239
15
IncomeTaxesOperatingIncome
Income Taxes - Federal (409.1)
262
2,899,330
13,102,660
2,200,309
13,102,660
5,101,152
1,513
16
IncomeTaxesUtilityOperatingIncomeOther
Income Taxes - Other (409.1)
262
6,222,309
3,660,431
2,562,400
522
17
ProvisionsForDeferredIncomeTaxesUtilityOperatingIncome
Provision for Deferred Income Taxes (410.1)
234, 272
99,750,629
119,408,475
71,864,710
86,200,026
27,889,965
33,216,113
4,046
7,664
18
ProvisionForDeferredIncomeTaxesCreditOperatingIncome
(Less) Provision for Deferred Income Taxes-Cr. (411.1)
234, 272
104,183,789
116,674,526
71,119,354
85,528,609
33,064,435
31,145,917
19
InvestmentTaxCreditAdjustments
Investment Tax Credit Adj. - Net (411.4)
266
239,294
3,229
278,029
3,140
38,735
89
20
GainsFromDispositionOfPlant
(Less) Gains from Disp. of Utility Plant (411.6)
21
LossesFromDispositionOfServiceCompanyPlant
Losses from Disp. of Utility Plant (411.7)
22
GainsFromDispositionOfAllowances
(Less) Gains from Disposition of Allowances (411.8)
2,678
2,681
2,678
2,681
23
LossesFromDispositionOfAllowances
Losses from Disposition of Allowances (411.9)
24
AccretionExpense
Accretion Expense (411.10)
25
UtilityOperatingExpenses
TOTAL Utility Operating Expenses (Enter Total of lines 4 thru 24)
1,098,286,276
982,584,824
828,257,376
768,805,848
269,351,571
213,037,261
677,329
741,715
27
NetUtilityOperatingIncome
Net Util Oper Inc (Enter Tot line 2 less 25)
270,400,518
246,192,637
234,502,430
210,055,339
35,916,244
36,158,543
18,156
21,245
28
OtherIncomeAndDeductionsAbstract
Other Income and Deductions
29
OtherIncomeAbstract
Other Income
30
NonutilityOperatingIncomeAbstract
Nonutilty Operating Income
31
RevenuesFromMerchandisingJobbingAndContractWork
Revenues From Merchandising, Jobbing and Contract Work (415)
984,271
1,119,881
32
CostsAndExpensesOfMerchandisingJobbingAndContractWork
(Less) Costs and Exp. of Merchandising, Job. & Contract Work (416)
112,834
129,044
33
RevenuesFromNonutilityOperations
Revenues From Nonutility Operations (417)
6,199
3,249
34
ExpensesOfNonutilityOperations
(Less) Expenses of Nonutility Operations (417.1)
825,423
817,089
35
NonoperatingRentalIncome
Nonoperating Rental Income (418)
36
EquityInEarningsOfSubsidiaryCompanies
Equity in Earnings of Subsidiary Companies (418.1)
119
849,309
760,968
37
InterestAndDividendIncome
Interest and Dividend Income (419)
2,397,370
9,455
38
AllowanceForOtherFundsUsedDuringConstruction
Allowance for Other Funds Used During Construction (419.1)
11,082,078
6,890,979
39
MiscellaneousNonoperatingIncome
Miscellaneous Nonoperating Income (421)
1,474,307
2,884,569
40
GainOnDispositionOfProperty
Gain on Disposition of Property (421.1)
41
OtherIncome
TOTAL Other Income (Enter Total of lines 31 thru 40)
14,156,659
4,953,830
42
OtherIncomeDeductionsAbstract
Other Income Deductions
43
LossOnDispositionOfProperty
Loss on Disposition of Property (421.2)
44
MiscellaneousAmortization
Miscellaneous Amortization (425)
45
Donations
Donations (426.1)
940,748
1,337,821
46
LifeInsurance
Life Insurance (426.2)
47
Penalties
Penalties (426.3)
91,744
2,290
48
ExpendituresForCertainCivicPoliticalAndRelatedActivities
Exp. for Certain Civic, Political & Related Activities (426.4)
230,698
258,486
49
OtherDeductions
Other Deductions (426.5)
4,325,600
1,912,005
50
OtherIncomeDeductions
TOTAL Other Income Deductions (Total of lines 43 thru 49)
5,405,302
317,988
51
TaxesApplicableToOtherIncomeAndDeductionsAbstract
Taxes Applic. to Other Income and Deductions
52
TaxesOtherThanIncomeTaxesOtherIncomeAndDeductions
Taxes Other Than Income Taxes (408.2)
262
34,252
39,850
53
IncomeTaxesFederal
Income Taxes-Federal (409.2)
262
2,639,222
9,702,786
54
IncomeTaxesOther
Income Taxes-Other (409.2)
262
3,962,420
759
55
ProvisionForDeferredIncomeTaxesOtherIncomeAndDeductions
Provision for Deferred Inc. Taxes (410.2)
234, 272
(a)
33,401,380
37,095,919
56
ProvisionForDeferredIncomeTaxesCreditOtherIncomeAndDeductions
(Less) Provision for Deferred Income Taxes-Cr. (411.2)
234, 272
28,687,003
47,403,819
57
InvestmentTaxCreditAdjustmentsNonutilityOperations
Investment Tax Credit Adj.-Net (411.5)
58
InvestmentTaxCredits
(Less) Investment Tax Credits (420)
59
TaxesOnOtherIncomeAndDeductions
TOTAL Taxes on Other Income and Deductions (Total of lines 52-58)
1,853,013
564,505
60
NetOtherIncomeAndDeductions
Net Other Income and Deductions (Total of lines 41, 50, 59)
10,604,370
5,836,323
61
InterestChargesAbstract
Interest Charges
62
InterestOnLongTermDebt
Interest on Long-Term Debt (427)
87,711,820
84,371,600
63
AmortizationOfDebtDiscountAndExpense
Amort. of Debt Disc. and Expense (428)
1,834,400
1,486,575
64
AmortizationOfLossOnReacquiredDebt
Amortization of Loss on Reaquired Debt (428.1)
2,809,928
2,809,928
65
AmortizationOfPremiumOnDebtCredit
(Less) Amort. of Premium on Debt-Credit (429)
66
AmortizationOfGainOnReacquiredDebtCredit
(Less) Amortization of Gain on Reaquired Debt-Credit (429.1)
67
InterestOnDebtToAssociatedCompanies
Interest on Debt to Assoc. Companies (430)
68
OtherInterestExpense
Other Interest Expense (431)
6,641,921
11,005,187
69
AllowanceForBorrowedFundsUsedDuringConstructionCredit
(Less) Allowance for Borrowed Funds Used During Construction-Cr. (432)
4,832,933
2,859,664
70
NetInterestCharges
Net Interest Charges (Total of lines 62 thru 69)
94,165,136
96,813,626
71
IncomeBeforeExtraordinaryItems
Income Before Extraordinary Items (Total of lines 27, 60 and 70)
186,839,752
155,215,334
72
ExtraordinaryItemsAbstract
Extraordinary Items
73
ExtraordinaryIncome
Extraordinary Income (434)
74
ExtraordinaryDeductions
(Less) Extraordinary Deductions (435)
75
NetExtraordinaryItems
Net Extraordinary Items (Total of line 73 less line 74)
76
IncomeTaxesExtraordinaryItems
Income Taxes-Federal and Other (409.3)
262
0
77
ExtraordinaryItemsAfterTaxes
Extraordinary Items After Taxes (line 75 less line 76)
78
NetIncomeLoss
Net Income (Total of line 71 and 77)
186,839,752
155,215,334


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: ProvisionForDeferredIncomeTaxesOtherIncomeAndDeductions
Included in the Provision for Deferred Income Taxes, in the Statements of Income, is amortization of the excess and deficient ADIT's as follows:

Line
No.
Description (a) (b) (c) (d) (e) (f) (g)
FERC Method of Amortization RSG SL ARAM/RSG SL
Amortization period Book Lives 5 Years Book Lives 5 Years
Protected/Unprotected Protected Unprotected Protected Unprotected
FERC Amorization Account 410.1 410.1 411.1 411.1
TCJA Excess ADIT Account Reduced 190 190 Subtotal 282 283 Subtotal
Reg Asset Acccount Impacted 182.3 182.3 182.3 254 254 254
1 Montana:
2 Electric 918,732  3,823,670  4,742,402  (1,439,863) (2,447,003) (3,886,866)
3 Gas (119,582) —  (119,582) (490,077) —  (490,077)
4 Subtotal 799,150  3,823,670  4,622,820  (1,929,940) (2,447,003) (4,376,943)
5 South Dakota:
6 Electric 138,139  —  138,139  (859,607) —  (859,607)
7 Gas (5,514) —  (5,514) (159,760) —  (159,760)
8 Subtotal 132,625  —  132,625  (1,019,367) —  (1,019,367)
9 Total 931,775  3,823,670  4,755,445  (2,949,307) (2,447,003) (5,396,310)


Line
No.
Description (a) (h) (i) (j) (k)
FERC Method of Amortization SL (MT) / RSG
(SD)
SL
Amortization period 5 years (MT) /
Book Lives
(SD)
5 Years
Protected/Unprotected F/T "as-if"
normalized
F/T "as-if"
normalized
FERC Amorization Account 411.1 410.1
TCJA Excess ADIT Account Reduced Total of 182.3 282 190
Reg Asset Acccount Impacted and 254 254 182.3 Total
1 Montana:
2 Electric 855,536  (9,824,624) 47,536  (8,921,552)
3 Gas (609,659) (2,831,410) —  (3,441,069)
4 Subtotal 245,877  (12,656,034) 47,536  (12,362,621)
5 South Dakota:
6 Electric (721,468) (464,843) —  (1,186,311)
7 Gas (165,274) (75,064) —  (240,338)
8 Subtotal (886,742) (539,907) —  (1,426,649)
9 Total (640,865) (13,195,941) 47,536  (13,789,270)
(b) Concept: AmortizationOfElectricPlantAcquisitionAdjustments
Amort. of Utility Plant Acq. Adj. of $15,948,277 consists of $14,747,883 for Montana Operations and $1,200,394 for South Dakota Operations.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report


End of:
2021
/
Q4
STATEMENT OF RETAINED EARNINGS
  1. Do not report Lines 49-53 on the quarterly report.
  2. Report all changes in appropriated retained earnings, unappropriated retained earnings, and unappropriated undistributed subsidiary earnings for the year.
  3. Each credit and debit during the year should be identified as to the retained earnings account in which recorded (Accounts 433, 436-439 inclusive). Show the contra primary account affected in column (b).
  4. State the purpose and amount for each reservation or appropriation of retained earnings.
  5. List first Account 439, Adjustments to Retained Earnings, reflecting adjustments to the opening balance of retained earnings. Follow by credit, then debit items, in that order.
  6. Show dividends for each class and series of capital stock.
  7. Show separately the State and Federal income tax effect of items shown for Account 439, Adjustments to Retained Earnings.
  8. Explain in a footnote the basis for determining the amount reserved or appropriated. If such reservation or appropriation is to be recurrent, state the number and annual amounts to be reserved or appropriated as well as the totals eventually to be accumulated.
  9. If any notes appearing in the report to stockholders are applicable to this statement, attach them at page 122.
Line No.
Item
(a)
Contra Primary Account Affected
(b)
Current Quarter/Year Year to Date Balance
(c)
Previous Quarter/Year Year to Date Balance
(d)
UnappropriatedRetainedEarningsAbstract
UNAPPROPRIATED RETAINED EARNINGS (Account 216)
1
UnappropriatedRetainedEarnings
Balance-Beginning of Period
666,673,846
632,569,216
2
ChangesAbstract
Changes
3
AdjustmentsToRetainedEarningsAbstract
Adjustments to Retained Earnings (Account 439)
4
AdjustmentsToRetainedEarningsCreditAbstract
Adjustments to Retained Earnings Credit
9
AdjustmentsToRetainedEarningsCredit
TOTAL Credits to Retained Earnings (Acct. 439)
10
AdjustmentsToRetainedEarningsDebitAbstract
Adjustments to Retained Earnings Debit
15
AdjustmentsToRetainedEarningsDebit
TOTAL Debits to Retained Earnings (Acct. 439)
16
BalanceTransferredFromIncome
Balance Transferred from Income (Account 433 less Account 418.1)
187,689,061
154,454,366
17
AppropriationsOfRetainedEarningsAbstract
Appropriations of Retained Earnings (Acct. 436)
22
AppropriationsOfRetainedEarnings
TOTAL Appropriations of Retained Earnings (Acct. 436)
23
DividendsDeclaredPreferredStockAbstract
Dividends Declared-Preferred Stock (Account 437)
29
DividendsDeclaredPreferredStock
TOTAL Dividends Declared-Preferred Stock (Acct. 437)
30
DividendsDeclaredCommonStockAbstract
Dividends Declared-Common Stock (Account 438)
30.1
DividendsDeclaredCommonStock
Common Stock Dividend
128,482,602
120,349,736
36
DividendsDeclaredCommonStock
TOTAL Dividends Declared-Common Stock (Acct. 438)
128,482,602
120,349,736
37
TransfersFromUnappropriatedUndistributedSubsidiaryEarnings
Transfers from Acct 216.1, Unapprop. Undistrib. Subsidiary Earnings
38
UnappropriatedRetainedEarnings
Balance - End of Period (Total 1,9,15,16,22,29,36,37)
725,880,305
666,673,846
39
AppropriatedRetainedEarningsAbstract
APPROPRIATED RETAINED EARNINGS (Account 215)
45
AppropriatedRetainedEarnings
TOTAL Appropriated Retained Earnings (Account 215)
AppropriatedRetainedEarningsAmortizationReserveFederalAbstract
APPROP. RETAINED EARNINGS - AMORT. Reserve, Federal (Account 215.1)
46
AppropriatedRetainedEarningsAmortizationReserveFederal
TOTAL Approp. Retained Earnings-Amort. Reserve, Federal (Acct. 215.1)
47
AppropriatedRetainedEarningsIncludingReserveAmortization
TOTAL Approp. Retained Earnings (Acct. 215, 215.1) (Total 45,46)
48
RetainedEarnings
TOTAL Retained Earnings (Acct. 215, 215.1, 216) (Total 38, 47) (216.1)
725,880,305
666,673,846
UnappropriatedUndistributedSubsidiaryEarningsAbstract
UNAPPROPRIATED UNDISTRIBUTED SUBSIDIARY EARNINGS (Account Report only on an Annual Basis, no Quarterly)
49
UnappropriatedUndistributedSubsidiaryEarnings
Balance-Beginning of Year (Debit or Credit)
1,295,383
534,415
50
EquityInEarningsOfSubsidiaryCompanies
Equity in Earnings for Year (Credit) (Account 418.1)
849,309
760,968
51
DividendsReceived
(Less) Dividends Received (Debit)
52
ChangesUnappropriatedUndistributedSubsidiaryEarningsCredits
TOTAL other Changes in unappropriated undistributed subsidiary earnings for the year
53
UnappropriatedUndistributedSubsidiaryEarnings
Balance-End of Year (Total lines 49 thru 52)
446,074
1,295,383


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
STATEMENT OF CASH FLOWS
  1. Codes to be used:(a) Net Proceeds or Payments;(b)Bonds, debentures and other long-term debt; (c) Include commercial paper; and (d) Identify separately such items as investments, fixed assets, intangibles, etc.
  2. Information about noncash investing and financing activities must be provided in the Notes to the Financial statements. Also provide a reconciliation between "Cash and Cash Equivalents at End of Period" with related amounts on the Balance Sheet.
  3. Operating Activities - Other: Include gains and losses pertaining to operating activities only. Gains and losses pertaining to investing and financing activities should be reported in those activities. Show in the Notes to the Financials the amounts of interest paid (net of amount capitalized) and income taxes paid.
  4. Investing Activities: Include at Other (line 31) net cash outflow to acquire other companies. Provide a reconciliation of assets acquired with liabilities assumed in the Notes to the Financial Statements. Do not include on this statement the dollar amount of leases capitalized per the USofA General Instruction 20; instead provide a reconciliation of the dollar amount of leases capitalized with the plant cost.
Line No.
Description (See Instructions No.1 for explanation of codes)
(a)
Current Year to Date Quarter/Year
(b)
Previous Year to Date Quarter/Year
(c)
1
NetCashFlowFromOperatingActivitiesAbstract
Net Cash Flow from Operating Activities
2
NetIncomeLoss
Net Income (Line 78(c) on page 117)
186,839,752
155,215,334
3
NoncashChargesCreditsToIncomeAbstract
Noncash Charges (Credits) to Income:
4
DepreciationAndDepletion
Depreciation and Depletion
159,377,975
151,804,069
5
NoncashAdjustmentsToCashFlowsFromOperatingActivities
Amortization of (Specify) (footnote details)
5.1
NoncashAdjustmentsToCashFlowsFromOperatingActivitiesDescription
Amortization of
27,651,815
27,398,894
5.2
NoncashAdjustmentsToCashFlowsFromOperatingActivitiesDescription
Other Noncash Charges to Income, Net
(a)
13,589,932
9,076,815
8
DeferredIncomeTaxesNet
Deferred Income Taxes (Net)
281,217
7,573,951
9
InvestmentTaxCreditAdjustmentsNet
Investment Tax Credit Adjustment (Net)
239,294
3,229
10
NetIncreaseDecreaseInReceivablesOperatingActivities
Net (Increase) Decrease in Receivables
12,236,033
2,531,086
11
NetIncreaseDecreaseInInventoryOperatingActivities
Net (Increase) Decrease in Inventory
19,613,582
7,107,682
12
NetIncreaseDecreaseInAllowancesInventoryOperatingActivities
Net (Increase) Decrease in Allowances Inventory
13
NetIncreaseDecreaseInPayablesAndAccruedExpensesOperatingActivities
Net Increase (Decrease) in Payables and Accrued Expenses
4,225,784
36,871,436
14
NetIncreaseDecreaseInOtherRegulatoryAssetsOperatingActivities
Net (Increase) Decrease in Other Regulatory Assets
10,802,572
22,881,012
15
NetIncreaseDecreaseInOtherRegulatoryLiabilitiesOperatingActivities
Net Increase (Decrease) in Other Regulatory Liabilities
2,175,662
9,752,605
16
AllowanceForOtherFundsUsedDuringConstructionOperatingActivities
(Less) Allowance for Other Funds Used During Construction
11,082,078
6,890,979
17
UndistributedEarningsFromSubsidiaryCompaniesOperatingActivities
(Less) Undistributed Earnings from Subsidiary Companies
849,309
760,968
18
OtherAdjustmentsToCashFlowsFromOperatingActivities
Other (provide details in footnote):
18.1
OtherAdjustmentsToCashFlowsFromOperatingActivitiesDescription
Other
(b)
129,078,465
25,733,348
22
NetCashFlowFromOperatingActivities
Net Cash Provided by (Used in) Operating Activities (Total of Lines 2 thru 21)
221,220,262
353,660,556
24
CashFlowsFromInvestmentActivitiesAbstract
Cash Flows from Investment Activities:
25
ConstructionAndAcquisitionOfPlantIncludingLandAbstract
Construction and Acquisition of Plant (including land):
26
GrossAdditionsToUtilityPlantLessNuclearFuelInvestingActivities
Gross Additions to Utility Plant (less nuclear fuel)
403,215,894
395,082,470
27
GrossAdditionsToNuclearFuelInvestingActivities
Gross Additions to Nuclear Fuel
28
GrossAdditionsToCommonUtilityPlantInvestingActivities
Gross Additions to Common Utility Plant
43,517,394
18,838,451
29
GrossAdditionsToNonutilityPlantInvestingActivities
Gross Additions to Nonutility Plant
30
AllowanceForOtherFundsUsedDuringConstructionInvestingActivities
(Less) Allowance for Other Funds Used During Construction
11,082,078
6,890,979
31
OtherConstructionAndAcquisitionOfPlantInvestmentActivities
Other (provide details in footnote):
34
CashOutflowsForPlant
Cash Outflows for Plant (Total of lines 26 thru 33)
435,651,210
407,029,942
36
AcquisitionOfOtherNoncurrentAssets
Acquisition of Other Noncurrent Assets (d)
37
ProceedsFromDisposalOfNoncurrentAssets
Proceeds from Disposal of Noncurrent Assets (d)
39
InvestmentsInAndAdvancesToAssociatedAndSubsidiaryCompanies
Investments in and Advances to Assoc. and Subsidiary Companies
40
ContributionsAndAdvancesFromAssociatedAndSubsidiaryCompanies
Contributions and Advances from Assoc. and Subsidiary Companies
41
DispositionOfInvestmentsInAndAdvancesToAssociatedAndSubsidiaryCompaniesAbstract
Disposition of Investments in (and Advances to)
42
DispositionOfInvestmentsInAndAdvancesToAssociatedAndSubsidiaryCompanies
Disposition of Investments in (and Advances to) Associated and Subsidiary Companies
44
PurchaseOfInvestmentSecurities
Purchase of Investment Securities (a)
45
ProceedsFromSalesOfInvestmentSecurities
Proceeds from Sales of Investment Securities (a)
46
LoansMadeOrPurchased
Loans Made or Purchased
47
CollectionsOnLoans
Collections on Loans
49
NetIncreaseDecreaseInReceivablesInvestingActivities
Net (Increase) Decrease in Receivables
50
NetIncreaseDecreaseInInventoryInvestingActivities
Net (Increase) Decrease in Inventory
51
NetIncreaseDecreaseInAllowancesHeldForSpeculationInvestingActivities
Net (Increase) Decrease in Allowances Held for Speculation
52
NetIncreaseDecreaseInPayablesAndAccruedExpensesInvestingActivities
Net Increase (Decrease) in Payables and Accrued Expenses
53
OtherAdjustmentsToCashFlowsFromInvestmentActivities
Other (provide details in footnote):
53.1
OtherAdjustmentsToCashFlowsFromInvestmentActivitiesDescription
Investment in Equity Securities
1,505,221
41,825
57
CashFlowsProvidedFromUsedInInvestmentActivities
Net Cash Provided by (Used in) Investing Activities (Total of lines 34 thru 55)
437,156,431
407,071,767
59
CashFlowsFromFinancingActivitiesAbstract
Cash Flows from Financing Activities:
60
ProceedsFromIssuanceAbstract
Proceeds from Issuance of:
61
ProceedsFromIssuanceOfLongTermDebtFinancingActivities
Long-Term Debt (b)
99,915,000
150,000,000
62
ProceedsFromIssuanceOfPreferredStockFinancingActivities
Preferred Stock
63
ProceedsFromIssuanceOfCommonStockFinancingActivities
Common Stock
196,246,244
64
OtherAdjustmentsToCashFlowsFromFinancingActivities
Other (provide details in footnote):
64.1
OtherAdjustmentsToCashFlowsFromFinancingActivitiesDescription
Treasury Stock Activity
706,750
1,391,881
66
NetIncreaseInShortTermDebt
Net Increase in Short-Term Debt (c)
100,000,000
67
OtherAdjustmentsByOutsideSourcesToCashFlowsFromFinancingActivities
Other (provide details in footnote):
67.1
DescriptionForOtherAdjustmentsByOutsideSourcesToCashFlowsFromFinancingActivities
Line of Credit (Repayments) Borrowings, Net
70
CashProvidedByOutsideSources
Cash Provided by Outside Sources (Total 61 thru 69)
296,867,994
248,608,119
72
PaymentsForRetirementAbstract
Payments for Retirement of:
73
PaymentsForRetirementOfLongTermDebtFinancingActivities
Long-term Debt (b)
955,280
74
PaymentsForRetirementOfPreferredStockFinancingActivities
Preferred Stock
75
PaymentsForRetirementOfCommonStockFinancingActivities
Common Stock
76
OtherRetirementsOfBalancesImpactingCashFlowsFromFinancingActivities
Other (provide details in footnote):
76.1
DescriptionOfOtherRetirementsImpactingCashFlowsFromFinancingActivities
Debt Financing Costs
909,219
2,577,869
76.2
DescriptionOfOtherRetirementsImpactingCashFlowsFromFinancingActivities
Line of Credit (Repayments) Borrowings, Net
151,000,000
67,000,000
78
NetDecreaseInShortTermDebt
Net Decrease in Short-Term Debt (c)
100,000,000
80
DividendsOnPreferredStock
Dividends on Preferred Stock
81
DividendsOnCommonStock
Dividends on Common Stock
128,482,602
120,349,736
83
CashFlowsProvidedFromUsedInFinancingActivities
Net Cash Provided by (Used in) Financing Activities (Total of lines 70 thru 81)
217,520,893
58,680,514
85
NetIncreaseDecreaseInCashAndCashEquivalentsAbstract
Net Increase (Decrease) in Cash and Cash Equivalents
86
NetIncreaseDecreaseInCashAndCashEquivalents
Net Increase (Decrease) in Cash and Cash Equivalents (Total of line 22, 57 and 83)
1,584,724
5,269,303
88
CashAndCashEquivalents
Cash and Cash Equivalents at Beginning of Period
(c)
15,397,446
10,128,143
90
CashAndCashEquivalents
Cash and Cash Equivalents at End of Period
(d)
16,982,170
(e)
15,397,446


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: NoncashAdjustmentsToCashFlowsFromOperatingActivities
12/31/2021 12/31/2020
Other Noncash Charges to Income, Net:
Amortization of debt issue costs, discount, and deferred hedge gain 5,257,572  4,910,248 
Gain on disposition of assets 9,412  7,274 
Other noncash gains 2,972,632  9,986 
Stock based compensation costs 5,350,316  4,149,307 
13,589,932  9,076,815 
Other Assets and Liabilities, Net:
Net change - other current assets (7,384,241) (1,960,590)
Net change - accrued utility revenues (17,657,124) 2,851,872 
Net change - deferred debits (87,230,851) 25,391,512 
Net change - deferred credits 22,435,310  25,602,125 
Net change - noncurrent liabilities (39,241,559) (26,151,571)
(129,078,465) 25,733,348 
(b) Concept: OtherAdjustmentsToCashFlowsFromOperatingActivities
Refer to footnote at column (b) line 6 for details.
(c) Concept: CashAndCashEquivalents
The following table provides a reconciliation of cash, cash equivalents, other special funds, and other special deposits reported within the Balance Sheets that sum to the total cash and cash equivalents amounts reflected in the Statement of Cash Flows:

12/31/2021 12/31/2020 12/31/2019
Cash (131) $ 2,300,750  $ 5,454,203  $ 4,652,822 
Working Funds (135) 23,250  22,950  23,150 
Special Funds (125-128) —  250,000  250,000 
Other Special Deposits (134) 14,658,170  9,670,293  5,202,171 
Total $ 16,982,170  $ 15,397,446  $ 10,128,143 
(d) Concept: CashAndCashEquivalents
Refer to footnote at column (b) line 88 for details.
(e) Concept: CashAndCashEquivalents
The following table provides a reconciliation of cash, cash equivalents, other special funds, and other special deposits reported within the Balance Sheets that sum to the total cash and cash equivalents amounts reflected in the Statement of Cash Flows:

12/31/2021 12/31/2020 12/31/2019
Cash (131) $ 2,300,750  $ 5,454,203  $ 4,652,822 
Working Funds (135) 23,250  22,950  23,150 
Special Funds (125-128) —  250,000  250,000 
Other Special Deposits (134) 14,658,170  9,670,293  5,202,171 
Total $ 16,982,170  $ 15,397,446  $ 10,128,143 

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
NOTES TO FINANCIAL STATEMENTS
  1. Use the space below for important notes regarding the Balance Sheet, Statement of Income for the year, Statement of Retained Earnings for the year, and Statement of Cash Flows, or any account thereof. Classify the notes according to each basic statement, providing a subheading for each statement except where a note is applicable to more than one statement.
  2. Furnish particulars (details) as to any significant contingent assets or liabilities existing at end of year, including a brief explanation of any action initiated by the Internal Revenue Service involving possible assessment of additional income taxes of material amount, or of a claim for refund of income taxes of a material amount initiated by the utility. Give also a brief explanation of any dividends in arrears on cumulative preferred stock.
  3. For Account 116, Utility Plant Adjustments, explain the origin of such amount, debits and credits during the year, and plan of disposition contemplated, giving references to Cormmission orders or other authorizations respecting classification of amounts as plant adjustments and requirements as to disposition thereof.
  4. Where Accounts 189, Unamortized Loss on Reacquired Debt, and 257, Unamortized Gain on Reacquired Debt, are not used, give an explanation, providing the rate treatment given these items. See General Instruction 17 of the Uniform System of Accounts.
  5. Give a concise explanation of any retained earnings restrictions and state the amount of retained earnings affected by such restrictions.
  6. If the notes to financial statements relating to the respondent company appearing in the annual report to the stockholders are applicable and furnish the data required by instructions above and on pages 114-121, such notes may be included herein.
  7. For the 3Q disclosures, respondent must provide in the notes sufficient disclosures so as to make the interim information not misleading. Disclosures which would substantially duplicate the disclosures contained in the most recent FERC Annual Report may be omitted.
  8. For the 3Q disclosures, the disclosures shall be provided where events subsequent to the end of the most recent year have occurred which have a material effect on the respondent. Respondent must include in the notes significant changes since the most recently completed year in such items as: accounting principles and practices; estimates inherent in the preparation of the financial statements; status of long-term contracts; capitalization including significant new borrowings or modifications of existing financing agreements; and changes resulting from business combinations or dispositions. However were material contingencies exist, the disclosure of such matters shall be provided even though a significant change since year end may not have occurred.
  9. Finally, if the notes to the financial statements relating to the respondent appearing in the annual report to the stockholders are applicable and furnish the data required by the above instructions, such notes may be included herein.
(1)Nature of Operations and Basis of Consolidation
NorthWestern Corporation, doing business as NorthWestern Energy, provides electricity and / or natural gas to approximately 753,600 customers in Montana, South Dakota, Nebraska and Yellowstone National Park. We have generated and distributed electricity in South Dakota and distributed natural gas in South Dakota and Nebraska since 1923 and have generated and distributed electricity and distributed natural gas in Montana since 2002.

The Financial Statements for the periods included herein have been prepared by NorthWestern Corporation (NorthWestern, we or us), pursuant to the rules and regulations of the Federal Energy Regulatory Commission (FERC) as set forth in its applicable Uniform System of Accounts and published accounting releases. The preparation of financial statements in conformity with the accounting requirements of the FERC as set forth in its applicable Uniform System of Accounts and published accounting releases requires management to make estimates and assumptions that may affect the reported amounts of assets, liabilities, revenues and expenses during the reporting period. Actual results could differ from those estimates.

Management has evaluated the impact of events occurring after December 31, 2021 up to February 11, 2022, the date that NorthWestern's financial statements prepared in accordance with the accounting principles generally accepted in the United States of America (GAAP) were issued, and has updated such evaluation for disclosure purposes through March 4, 2022. These financial statements include all necessary adjustments and disclosures resulting from these evaluations.
(2)Significant Accounting Policies

Financial Statement Presentation

The financial statements are presented on the basis of the accounting requirements of the FERC as set forth in its applicable Uniform System of Accounts and published accounting releases, which is a comprehensive basis of accounting other than GAAP. This report differs from GAAP due to FERC requiring the presentation of subsidiaries on the equity method of accounting, which differs from Accounting Standards Codification (ASC) 810, Consolidation. ASC 810 requires that all majority-owned subsidiaries be consolidated (see Note 4). The other significant differences consist of the following:

Earnings per share and footnotes for revenue from contracts with customers, segment and related information, and quarterly financial data (unaudited) are not presented;
Removal and decommissioning costs of generation, transmission and distribution assets are reflected in the Balance Sheets as a component of accumulated depreciation of $479.3 million and $464.7 million as of December 31, 2021 and December 31, 2020, respectively, in accordance with regulatory treatment as compared to regulatory liabilities for GAAP purposes;
Goodwill is reflected in the Balance Sheets as a utility plant adjustments of $357.6 million as of December 31, 2021 and December 31, 2020, respectively, in accordance with regulatory treatment, as compared to goodwill for GAAP purposes (see Note 8);
The write-down of plant values associated with the 2002 acquisition of the Montana operations is reflected in the Balance Sheets as a component of accumulated depreciation of $147.6 million for December 31, 2021 and December 31, 2020, respectively, in accordance with regulatory treatment as compared to plant for GAAP purposes;
The current portion of gas stored underground is reflected in the Balance Sheets as current and accrued assets, as compared to inventory for GAAP purposes;
Operating lease right of use assets are reflected in the Balance Sheets as capital leases of $2.1 million and $2.9 million as of December 31, 2021 and December 31, 2020, respectfully, in accordance with regulatory treatment, as compared to non-current assets for GAAP purposes;
Operating lease liabilities are reflected in the Balance Sheets as current and long term obligations under capital leases of $2.1 million and $2.9 million as of December 31, 2021 and December 31, 2020, respectfully, in accordance with regulatory treatment, as compared to accrued expenses and long term liabilities for GAAP purposes;
Unamortized debt expense is classified in the Balance Sheets as deferred debits in accordance with regulatory treatment, as compared to long-term debt for GAAP purposes;
Current and long-term debt is classified in the Balance Sheets as all long-term debt in accordance with regulatory treatment, while current and long-term debt are presented separately for GAAP reporting;
The current portion of the provision for injuries and damages and the expected insurance proceeds receivable related to the provision for injuries and damages are reported as a current liability for GAAP purposes, as compared to a non-current liability for FERC purposes;
Accumulated deferred tax assets and liabilities are classified in the Balance Sheets as gross non-current deferred debits and credits, respectively, while GAAP presentation reflects a net non-current deferred tax liability;
Stranded tax effects associated with the Tax Cuts and Jobs Act are included in accumulated other comprehensive income (AOCI) in accordance with regulatory treatment, while included in retained earnings for GAAP purposes;
Uncertain tax positions related to temporary differences are classified in the Balance Sheets within the deferred tax accounts in accordance with regulatory treatment, as compared to other noncurrent liabilities for GAAP purposes. In addition, interest related to uncertain tax positions is recognized in interest expense in accordance with regulatory treatment, as compared to income tax expense for GAAP purposes;
Net periodic benefit costs and net periodic post retirement benefit costs are reflected in operating expense for FERC purposes, as compared to the GAAP presentation, which reflects the current service costs component of the net periodic benefit costs in operating expenses and the other components outside of income from operations. In addition, only the service cost component of net periodic benefit cost is eligible for capitalization for GAAP purposes, as compared to the total net periodic benefit costs for FERC purposes;
Regulatory assets and liabilities are reflected in the Balance Sheets as non-current items, while current and non-current amounts are presented separately for GAAP;
Unbilled revenue is reflected in the Balance Sheets in Accrued utility revenues in accordance with regulatory treatment, as compared to Accounts receivable, net for GAAP purposes;
Implementation costs associated with cloud computing arrangements are reflected on the Balance Sheets as Miscellaneous Intangible Plant in accordance with regulatory treatment, as compared to Other current assets for GAAP purposes. Additionally, these cash outflows are presented within investing activities cash outflows in the Statement of Cash Flows in accordance with regulatory treatment, as compared to operating activities cash outflows for GAAP purposes; and
GAAP revenue differs from FERC revenue primarily due to the equity method of accounting as discussed above, netting of electric purchases and sales for resale in revenue for the GAAP presentation as compared to a gross presentation for FERC purposes (with the exception of those transactions in a regional transmission organization (RTO)), the netting of RTO transmission transactions for the GAAP presentation as compared to a gross presentation for FERC purposes, and the classification of regulatory amortizations in revenue for GAAP purposes as compared to expense for FERC purposes.
The following table reconciles GAAP revenues to FERC revenues by segment for the twelve months ended December 31, 2021 and 2020 (in millions):

Year Ended December 31, 2021
TotalElectric
Natural
Gas
Other
GAAP Revenues$1,372.3 $1,052.2 $320.1 $— 
Revenue from equity investments(3.0)— (3.0)— 
Grossing revenues / power purchases38.1 38.1 — — 
Regulatory amortizations(42.7)(32.1)(10.6)— 
Other4.0 4.6 (1.3)0.7 
FERC Revenues$1,368.7 $1,062.8 $305.2 $0.7 
Year Ended December 31, 2020
TotalElectric
Natural
Gas
Other
GAAP Revenues$1,198.7 $1,198.7 $940.8 $257.9 $— 
Revenue from equity investments(3.3)— (3.3)— 
Grossing revenues / power purchases23.1 23.1 — — 
Regulatory amortizations9.9 13.9 (4.0)— 
Other0.4 1.1 (1.4)0.7 
FERC Revenues$1,228.8 $978.9 $249.2 $0.7 

Use of Estimates

The preparation of financial statements in conformity with the regulatory basis of accounting requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the Financial Statements and the reported amounts of revenues and expenses during the reporting period. Estimates are used for such items as long-lived asset values and impairment charges, long-lived asset useful lives, tax provisions, uncertain tax position reserves, asset retirement obligations, regulatory assets and liabilities, allowances for uncollectible accounts, our Qualifying Facilities liability, environmental liabilities, unbilled revenues and actuarially determined benefit costs and liabilities. We revise the recorded estimates when we receive better information or when we can determine actual amounts. Those revisions can affect operating results.

Revenue Recognition

The Company recognizes revenue as customers obtain control of promised goods and services in an amount that reflects consideration expected in exchange for those goods or services. Generally, the delivery of electricity and natural gas results in the transfer of control to customers at the time the commodity is delivered and the amount of revenue recognized is equal to the amount billed to each customer, including estimated volumes delivered when billings have not yet occurred.

Cash Equivalents

We consider all highly liquid investments with maturities of three months or less at the time of purchase to be cash equivalents.

Accounts Receivable, Net

Accounts receivable are net of allowances for uncollectible accounts of $2.3 million and $5.6 million at December 31, 2021 and December 31, 2020. Unbilled revenues were $98.1 million and $80.5 million at December 31, 2021 and December 31, 2020, respectively.

Inventories

Inventories are stated at average cost. Inventory consisted of the following (in thousands):

December 31,
20212020
Fuel stock$7,510 $6,561 
Plant materials and operating supplies53,539 43,692 
Gas stored underground (including the non-current portion reflected in utility plant)55,019 46,207 
Total Inventories$116,068 $96,460 
Regulation of Utility Operations

Our regulated operations are subject to the provisions of ASC 980, Regulated Operations. Regulated accounting is appropriate provided that (i) rates are established by or subject to approval by independent, third-party regulators, (ii) rates are designed to recover the specific enterprise's cost of service, and (iii) in view of demand for service, it is reasonable to assume that rates are set at levels that will recover costs and can be charged to and collected from customers.

Our Financial Statements reflect the effects of the different rate making principles followed by the jurisdictions regulating us. The economic effects of regulation can result in regulated companies recording costs that have been, or are deemed probable to be, allowed in the ratemaking process in a period different from the period in which the costs would be charged to expense by an unregulated enterprise. When this occurs, costs are deferred as regulatory assets and recorded as expenses in the periods when those same amounts are reflected in rates. Additionally, regulators can impose liabilities upon a regulated company for amounts previously collected from customers and for amounts that are expected to be refunded to customers (Accumulated Provision for Rate Refunds).

If we were required to terminate the application of these provisions to our regulated operations, all such deferred amounts would be recognized in the Statements of Income at that time. This would result in a charge to earnings and AOCI, net of applicable income taxes, which could be material. In addition, we would determine any impairment to the carrying costs of deregulated plant and inventory assets.

Derivative Financial Instruments

We account for derivative instruments in accordance with ASC 815, Derivatives and Hedging. All derivatives are recognized in the Balance Sheets at their fair value unless they qualify for certain exceptions, including the normal purchases and normal sales exception. Additionally, derivatives that qualify and are designated for hedge accounting are classified as either hedges of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair-value hedge) or hedges of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash-flow hedge). For fair-value hedges, changes in fair values for both the derivative and the underlying hedged exposure are recognized in earnings each period. For cash-flow hedges, the portion of the derivative gain or loss that is effective in offsetting the change in the cost or value of the underlying exposure is deferred in AOCI and later reclassified into earnings when the underlying transaction occurs. Gains and losses from the ineffective portion of any hedge are recognized in earnings immediately. For other derivative contracts that do not qualify or are not designated for hedge accounting, changes in the fair value of the derivatives are recognized in earnings each period. Cash inflows and outflows related to derivative instruments are included as a component of operating, investing or financing cash flows in the Statements of Cash Flows, depending on the underlying nature of the hedged items.
 
Revenues and expenses on contracts that are designated as normal purchases and normal sales are recognized when the underlying physical transaction is completed. While these contracts are considered derivative financial instruments, they are not required to be recorded at fair value, but on an accrual basis of accounting. Normal purchases and normal sales are contracts where physical delivery is probable, quantities are expected to be used or sold in the normal course of business over a reasonable period of time, and price is not tied to an unrelated underlying derivative. As part of our regulated electric and gas operations, we enter into contracts to buy and sell energy to meet the requirements of our customers. These contracts include short-term and long-term commitments to purchase and sell energy in the retail and wholesale markets with the intent and ability to deliver or take delivery. If it were determined that a transaction designated as a normal purchase or a normal sale no longer met the exceptions, the fair value of the related contract would be reflected as an asset or liability and immediately recognized through earnings. See Note 9 - Risk Management and Hedging Activities, for further discussion of our derivative activity.

Utility Plant

Utility plant stated at original cost, including contracted services, direct labor and material, allowance for funds used during construction (AFUDC), and indirect charges for engineering, supervision and similar overhead items. All expenditures for maintenance and repairs of utility plant are charged to the appropriate maintenance expense accounts. A betterment or
replacement of a unit of property is accounted for as an addition and retirement of utility plant. At the time of such a retirement, the accumulated provision for depreciation is charged with the original cost of the property retired and also for the net cost of removal. Also included in plant and equipment are assets under finance lease, which are stated at the present value of minimum lease payments.

AFUDC represents the cost of financing construction projects with borrowed funds and equity funds. While cash is not realized currently from such allowance, it is realized under the ratemaking process over the service life of the related property through increased revenues resulting from a higher rate base and higher depreciation expense. The component of AFUDC attributable to borrowed funds is included as a reduction to net interest charges, while the equity component is included in other income. This rate averaged 6.6% and 6.7% for Montana for 2021 and 2020, respectively. This rate averaged 6.4% and 6.7% for South Dakota for 2021 and 2020, respectively. AFUDC capitalized totaled $15.9 million and $9.8 million for the years ended December 31, 2021 and 2020, respectively, for Montana and South Dakota combined.

We record provisions for depreciation at amounts substantially equivalent to calculations made on a straight-line method by applying various rates based on useful lives of the various classes of properties (ranging from 2 to 96 years) determined from engineering studies. As a percentage of the depreciable utility plant at the beginning of the year, our provision for depreciation of utility plant was approximately 2.8% for 2021 and 2020.

Depreciation rates include a provision for our share of the estimated costs to decommission our jointly owned plants at the end of the useful life. The annual provision for such costs is included in depreciation expense, while the accumulated provisions are included in accumulated depreciation.

Pension and Postretirement Benefits

We have liabilities under defined benefit retirement plans and a postretirement plan that offers certain health care and life insurance benefits to eligible employees and their dependents. The costs of these plans are dependent upon numerous factors, assumptions and estimates, including determination of discount rate, expected return on plan assets, rate of future compensation increases, age and mortality and employment periods. In determining the projected benefit obligations and costs, assumptions can change from period to period and may result in material changes in the cost and liabilities we recognize.

Income Taxes

We follow the liability method in accounting for income taxes. Deferred income tax assets and liabilities represent the future effects on income taxes from temporary differences between the bases of assets and liabilities for financial reporting and tax purposes. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to reverse. The probability of realizing deferred tax assets is based on forecasts of future taxable income and the availability of tax planning strategies that can be implemented, if necessary, to realize deferred tax assets. We establish a valuation allowance when it is more likely than not that all, or a portion of, a deferred tax asset will not be realized.

Exposures exist related to various tax filing positions, which may require an extended period of time to resolve and may result in income tax adjustments by taxing authorities. We have reduced deferred tax assets or established liabilities based on our best estimate of future probable adjustments related to these exposures. On a quarterly basis, we evaluate exposures in light of any additional information and make adjustments as necessary to reflect the best estimate of the future outcomes. We believe our deferred tax assets and established liabilities are appropriate for estimated exposures; however, actual results may differ from these estimates. The resolution of tax matters in a particular future period could have a material impact on our Statements of Income and provision for income taxes.

Environmental Costs

We record environmental costs when it is probable we are liable for the costs and we can reasonably estimate the liability. We may defer costs as a regulatory asset if there is precedent for recovering similar costs from customers in rates. Otherwise, we expense the costs. If an environmental cost is related to facilities we currently use, such as pollution control
equipment, then we may capitalize and depreciate the costs over the remaining life of the asset, assuming the costs are recoverable in future rates or future cash flows.

Our remediation cost estimates are based on the use of an environmental consultant, our experience, our assessment of the current situation and the technology currently available for use in the remediation. We regularly adjust the recorded costs as we revise estimates and as remediation proceeds. If we are one of several designated responsible parties, then we estimate and record only our share of the cost.

Supplemental Cash Flow Information

Year Ended December 31,
20212020
(in thousands)
Cash paid (received) for:
Income taxes$4,330 $115 
Interest87,221 84,922 
Significant non-cash transactions:
Capital expenditures included in trade accounts payable29,034 21,430 
NMTC debt extinguishment included in other noncurrent assets(1)
18,169 
NMTC debt extinguishment included in utility plant(1)
6,594 
NMTC debt extinguishment included in long-term debt(1)
1,259 
(1) See Note 12 - Long-Term Debt for further information regarding these non-cash transactions.

The following table provides a reconciliation of cash, working funds, other special funds, and special deposits reported within the Balance Sheets that sum to the total of the same such amounts shown in the Statements of Cash Flows (in thousands):
December 31,
20212020
Cash
$2,301 $5,454 
Working funds
23 23 
Other special funds
— 250 
Special deposits
14,658 9,670 
Total shown in the Statement of Cash Flows
$16,982 $15,397 

Other special funds and special deposits consist primarily of funds held in trust accounts to satisfy the requirements of certain stipulation agreements and insurance reserve requirements.

Accounting Standards Issued

At this time, we are not expecting the adoption of recently issued accounting standards to have a material impact to our financial condition, results of operations, and cash flows.
(3)Regulatory Matters

Power Costs and Credits Adjustment Mechanism (PCCAM) - Montana

We track electric supply costs for our Montana electric utility, such as purchased power and fuel, against a forecast of costs approved by the Montana Public Service Commission (MPSC). This forecast is referred to as the power costs and credits adjustment mechanism base (PCCAM Base). If our actual costs exceed the approved PCCAM Base revenues on an annual basis, we can recover 90% of the excess costs, with the non-recoverable 10% impacting net income. Our QF power purchase costs are recoverable through rates separate from the PCCAM Base. The MPSC reviews these costs annually, with NorthWestern receiving an automatic adjustment through interim rates, subject to refund, effective on October 1 of each year. During the twelve months ended December 31, 2021 we recognized $5.4 million of non-recoverable excess PCCAM supply costs, compared to $0.8 million of non-recoverable excess PCCAM supply costs for the twelve months ended December 31, 2020.

The current PCCAM Base, approved in 2019, no longer reflects an accurate current forecast of our fuel and power costs. In April 2021, we filed an application with the MPSC for approval to increase the PCCAM Base by approximately $17.0 million. On June 29, 2021, the MPSC approved interim rates reflecting our request, subject to refund. On August 2, 2021, the MCC filed a motion asking the MPSC to dismiss the application arguing that the MPSC issued a Final Order in 2018 prohibiting NorthWestern from requesting an update to the PCCAM Base, except in a general rate case. NorthWestern argued that the tariff, which the MPSC approved as implementing the Final Order, allows us to file an application outside of a general rate case. On October 5, 2021, the MPSC voted to grant the MCC’s motion to dismiss. The MPSC issued the final written order on December 2, 2021, dismissing our application. As of December 31, 2021, we had deferred revenue of approximately $8.2 million, which we expect to refund in 2022, associated with these interim rates, including interest.

Montana Community Renewable Energy Projects (CREPs)

We were required to acquire, as of December 31, 2020, approximately 65 MW of CREPs. While we made progress
towards meeting this obligation by acquiring approximately 50 MW of CREPs, we were unable to acquire the remaining MWs required for various reasons, including the fact that proposed projects fail to qualify as CREPs or do not meet the statutory cost cap. The MPSC granted us waivers for 2012 through 2016. The validity of the MPSC’s action as it related to waivers granted for 2015 and 2016 has been challenged legally and was fully briefed before the Montana Supreme Court.

On May 14, 2021, the Montana Governor signed a bill that eliminated the state's Renewable Portfolio Standard, including repeal of the CREP requirement. We notified the Montana Supreme Court of the repeal. We also dismissed our pending application filed with the MPSC for a waiver from full compliance for years 2017 through 2020.

On September 7, 2021, the Montana Supreme Court remanded the case challenging the 2015 and 2016 waivers to the District Court to determine whether the repeal of the CREP requirement made the petition moot. The matter has been fully briefed before the District Court. In that briefing, the Montana Environmental Information Center requested the District Court to amend its previous judgment and penalize us $2.5 million for failure to comply with the CREP requirement in 2015 and 2016. We responded to this request arguing that it was unlawful for the District Court to penalize us. We expect a decision from the District Court in the first half of 2022.

If the Montana Courts and/or MPSC determine that the repeal should not be applied retroactively and find that waivers
should not be granted, we could be liable for penalties. However, we do not believe any such penalties would be material.

FERC Financial Audit

We are subject to FERC’s jurisdiction and regulations with respect to rates for electric transmission service in interstate commerce and electricity sold at wholesale rates, the issuance of certain securities, and incurrence of certain long-term debt, among other things. The Division of Audits and Accounting in the Office of Enforcement of FERC has initiated a routine
audit of NorthWestern Corporation for the period of January 1, 2018 to the present to evaluate our compliance with FERC accounting and financial reporting requirements. We have responded to several sets of data requests as part of the audit process. An audit report has not yet been received from FERC, but is expected during the first quarter of 2022. Management is unable to predict the outcome or timing of the final resolution of the audit.
(4)Equity Investments

The following table presents our equity investments reflected in the investments in subsidiary companies on the Balance Sheets (in thousands):

December 31,
2021

2020
Havre Pipeline Company, LLC$12,130 

$13,219 
Canadian Montana Pipeline Corporation4,867 4,619 
NorthWestern Services, LLC2,065 2,018 
NorthWestern Energy Solutions, Inc.4,126 2,629 
Risk Partners Assurance, Ltd.1,190 1,248 
Total Investments in Subsidiary Companies$24,378 $23,733 
(5)Regulatory Assets and Liabilities

We prepare our Financial Statements in accordance with the provisions of ASC 980, as discussed in Note 2 - Significant Accounting Policies. Pursuant to this guidance, certain expenses and credits, normally reflected in income as incurred, are deferred and recognized when included in rates and recovered from or refunded to customers. Regulatory assets and liabilities are recorded based on management's assessment that it is probable that a cost will be recovered or that an obligation has been incurred. Accordingly, we have recorded the following major classifications of regulatory assets and liabilities that will be recognized in expenses and revenues in future periods when the matching revenues are collected or refunded. These regulatory items have corresponding assets and liabilities that will be paid for or refunded in future periods.

Note Reference
Remaining Amortization Period
December 31,


20212020
(in thousands)
Flow-through income taxes14Plant Lives$464,664 $420,925 
Pension16See Note 1698,336 138,567 
Excess deferred income taxes14Plant Lives60,813 67,256 
Employee related benefits16Various21,648 22,516 
State & local taxes & feesVarious6,514 17,904 
Environmental clean-up19Various11,262 11,127 
OtherVarious21,912 34,090 
Total Regulatory Assets
$685,149 $712,385 
Excess deferred income taxes14Plant Lives158,047 165,434 
Unbilled revenue1 Year16,430 12,072 
Gas storage sales19 years7,466 7,887 
State & local taxes & fees1 Year3,021 1,783 
Environmental clean-up and otherVarious693 656 
Total Regulatory Liabilities
$185,657 $187,832 

Income Taxes

Flow-through income taxes primarily reflect the effects of plant related temporary differences such as flow-through of depreciation, repairs related deductions, and removal costs that we will recover or refund in future rates. We amortize these amounts as temporary differences reverse. Excess deferred income tax assets and liabilities are recorded as a result of the Tax Cuts and Jobs Act and will be recovered or refunded in future rates. See Note 14 - Income Taxes for further discussion.

Pension and Employee Related Benefits

We recognize the unfunded portion of plan benefit obligations in the Balance Sheets, which is remeasured at each year end, with a corresponding adjustment to regulatory assets/liabilities as the costs associated with these plans are recovered in rates. The MPSC allows recovery of pension costs on a cash funding basis. The portion of the regulatory asset related to our Montana pension plan will amortize as cash funding amounts exceed accrual expense under GAAP. The SDPUC allows recovery of pension costs on an accrual basis. The MPSC allows recovery of postretirement benefit costs on an accrual basis.

State & Local Taxes & Fees (Montana Property Tax Tracker)
Under Montana law, we are allowed to track the changes in the actual level of state and local taxes and fees and recover the increase in rates, less the amount allocated to FERC jurisdictional customers and net of the related income tax benefit.

Environmental Clean-up

Environmental clean-up costs are the estimated costs of investigating and cleaning up contaminated sites we own. We discuss the specific sites and clean-up requirements further in Note 19 - Commitments and Contingencies. Environmental clean-up costs are typically recoverable in customer rates when they are actually incurred. When cost projections become known and measurable, we coordinate with the appropriate regulatory authority to determine a recovery period.

Gas Storage Sales

A regulatory liability was established in 2000 and 2001 based on gains on cushion gas sales in Montana. This gain is being flowed to customers over a period that matches the depreciable life of surface facilities that were added to maintain deliverability from the field after the withdrawal of the gas. This regulatory liability is a reduction of rate base.

Unbilled Revenue

In accordance with regulatory guidance in South Dakota, we recognize revenue when it is billed. Accordingly, we record a regulatory liability to offset unbilled revenue.
(6)Utility Plant

The following table presents the major classifications of our net utility plant (in thousands):

Estimated
Useful Life
December 31,
2021

2020
(in thousands)
Land and improvements53 – 96$169,840 $165,617 
Building and improvements23 – 73510,994 516,678 
Storage, distribution, and transmission15 – 954,112,523 3,879,157 
Generation23 – 721,221,501 1,185,608 
Construction work in process284,729 166,454 
Other equipment2 – 451,069,228 1,050,145 
Total utility plant7,368,815 6,963,659 
Less accumulated depreciation(2,648,396)(2,527,093)
Net utility plant$4,720,419 $4,436,566 

Net utility plant under capital (finance) lease were $9.2 million and $11.3 million as of December 31, 2021 and 2020, respectively, which included $9.0 million and $11.1 million as of December 31, 2021 and 2020, respectively, related to a long-term power supply contract with the owners of a natural gas fired peaking plant, which has been accounted for as a finance lease.

Jointly Owned Electric Generating Plant

We have an ownership interest in four base-load electric generating plants, all of which are coal fired and operated by other companies. We have an undivided interest in these facilities and are responsible for our proportionate share of the
capital and operating costs while being entitled to our proportionate share of the power generated. Our interest in each plant is reflected in the Balance Sheets on a pro rata basis and our share of operating expenses is reflected in the Statements of Income. The participants each finance their own investment.

Information relating to our ownership interest in these facilities is as follows (in thousands):

Big Stone
(SD)
Neal #4
(IA)
Coyote
(ND)
Colstrip Unit 4 (MT)
December 31, 2021
Ownership percentages
23.4 %8.7 %10.0 %30.0 %
Plant in service
$154,375 $62,865 $51,652 $324,433 
Accumulated depreciation
45,895 37,749 41,918 114,830 
December 31, 2020
Ownership percentages
23.4 %8.7 %10.0 %30.0 %
Plant in service
$153,632 $62,927 $51,586 $317,438 
Accumulated depreciation
44,329 37,000 41,402 106,679 
(7)Asset Retirement Obligations

We are obligated to dispose of certain long-lived assets upon their abandonment. We recognize a liability for the legal obligation to perform an asset retirement activity in which the timing and/or method of settlement are conditional on a future event. We measure the liability at fair value when incurred and capitalize a corresponding amount as part of the book value of the related assets, which increases our utility plant and asset retirement obligations (ARO). The increase in the capitalized cost is included in determining depreciation expense over the estimated useful life of these assets. Since the fair value of the ARO is determined using a present value approach, accretion of the liability due to the passage of time is recognized each period and recorded as a regulatory asset until the settlement of the liability. Revisions to estimated AROs can result from changes in retirement cost estimates, revisions to estimated inflation rates, and changes in the estimated timing of abandonment. If the obligation is settled for an amount other than the carrying amount of the liability, we will recognize a regulatory asset or liability for the difference, which will be surcharged/refunded to customers through the rate making process. We record regulatory assets and liabilities for differences in timing of asset retirement costs recovered in rates and AROs recorded since asset retirement costs are recovered through rates charged to customers.

Our AROs relate to the reclamation and removal costs at our jointly-owned coal-fired generation facilities, U.S. Department of Transportation requirements to cut, purge and cap retired natural gas pipeline segments, our obligation to plug and abandon oil and gas wells at the end of their life, and to remove all above-ground wind power facilities and restore the soil surface at the end of their life. The following table presents the change in our ARO (in thousands):

December 31,
2021

2020
Liability at January 1,
$45,355 $42,449 
Accretion expense
2,233 2,070 
Liabilities incurred
— — 
Liabilities settled
(2,906)(4,061)
Revisions to cash flows
(3,935)4,897 
Liability at December 31,
$40,747 $45,355 

During the twelve months ended December 31, 2021 our ARO liability decreased $2.9 million for partial settlement of the legal obligations at our jointly-owned coal-fired generation facilities. Additionally, during the twelve months ended
December 31, 2021, our ARO liability decreased $4.1 million related to changes in both the timing and amount of retirement cost estimates.

In addition, we have identified removal liabilities related to our electric and natural gas transmission and distribution assets that have been installed on easements over property not owned by us. The easements are generally perpetual and only require remediation action upon abandonment or cessation of use of the property for the specified purpose. The ARO liability is not estimable for such easements as we intend to utilize these properties indefinitely. In the event we decide to abandon or cease the use of a particular easement, an ARO liability would be recorded at that time. We also identified AROs associated with our hydroelectric generating facilities; however, due to the indeterminate removal date, the fair value of the associated liabilities currently cannot be estimated and no amounts are recognized in the Financial Statements.

We collect removal costs in rates for certain transmission and distribution assets that do not have associated AROs. Generally, the accrual of future non-ARO removal obligations is not required; however, long-standing ratemaking practices approved by applicable state and federal regulatory commissions have allowed provisions for such costs in historical depreciation rates.
(8)Utility Plant Adjustments

We completed our annual utility plant adjustments impairment test as of April 1, 2021 and no impairment was identified. We calculate the fair value of our reporting units by considering various factors, including valuation studies based primarily on a discounted cash flow analysis, with published industry valuations and market data as supporting information. Key assumptions in the determination of fair value include the use of an appropriate discount rate and estimated future cash flows. In estimating cash flows, we incorporate expected long-term growth rates in our service territory, regulatory stability, and commodity prices (where appropriate), as well as other factors that affect our revenue, expense and capital expenditure projections.
(9)Risk Management and Hedging Activities

Nature of Our Business and Associated Risks

We are exposed to certain risks related to the ongoing operations of our business, including the impact of market fluctuations in the price of electricity and natural gas commodities and changes in interest rates. We rely on market purchases to fulfill a portion of our electric and natural gas supply requirements. Several factors influence price levels and volatility. These factors include, but are not limited to, seasonal changes in demand, weather conditions, available generating assets within regions, transportation availability and reliability within and between regions, fuel availability, market liquidity, and the nature and extent of current and potential federal and state regulations.

Objectives and Strategies for Using Derivatives

To manage our exposure to fluctuations in commodity prices we routinely enter into derivative contracts. These types of contracts are included in our electric and natural gas supply portfolios and are used to manage price volatility risk by taking advantage of fluctuations in market prices. While individual contracts may be above or below market value, the overall portfolio approach is intended to provide greater price stability for consumers. We do not maintain a trading portfolio, and our derivative transactions are only used for risk management purposes consistent with regulatory guidelines.

In addition, we may use interest rate swaps to manage our interest rate exposures associated with new debt issuances or to manage our exposure to fluctuations in interest rates on variable rate debt.

Accounting for Derivative Instruments

We evaluate new and existing transactions and agreements to determine whether they are derivatives. The permitted accounting treatments include: normal purchase normal sale (NPNS); cash flow hedge; fair value hedge; and mark-to-market.
Mark-to-market accounting is the default accounting treatment for all derivatives unless they qualify, and we specifically designate them, for one of the other accounting treatments. Derivatives designated for any of the elective accounting treatments must meet specific, restrictive criteria both at the time of designation and on an ongoing basis. The changes in the fair value of recognized derivatives are recorded each period in current earnings or other comprehensive income, depending on whether a derivative is designated as part of a hedge transaction and the type of hedge transaction.

Normal Purchases and Normal Sales

We have applied the NPNS scope exception to our contracts involving the physical purchase and sale of gas and electricity at fixed prices in future periods. During our normal course of business, we enter into full-requirement energy contracts, power purchase agreements and physical capacity contracts, which qualify for NPNS. All of these contracts are accounted for using the accrual method of accounting; therefore, there were no unrealized amounts recorded in the Financial Statements at December 31, 2021 and 2020. Revenues and expenses from these contracts are reported on a gross basis in the appropriate revenue and expense categories as the commodities are received or delivered.

Credit Risk

Credit risk is the potential loss resulting from counterparty non-performance under an agreement. We manage credit risk with policies and procedures for, among other things, counterparty analysis and exposure measurement, monitoring and mitigation. We limit credit risk in our commodity and interest rate derivatives activities by assessing the creditworthiness of potential counterparties before entering into transactions with them and continuing to evaluate their creditworthiness on an ongoing basis.

We are exposed to credit risk through buying and selling electricity and natural gas to serve customers. We may request collateral or other security from our counterparties based on the assessment of creditworthiness and expected credit exposure. It is possible that volatility in commodity prices could cause us to have material credit risk exposures with one or more counterparties. We enter into commodity master enabling agreements with our counterparties to mitigate credit exposure, as
these agreements reduce the risk of default by allowing us or our counterparty the ability to make net payments. The agreements generally are: (1) Western Systems Power Pool agreements – standardized power purchase and sales contracts in the electric industry; (2) International Swaps and Derivatives Association agreements – standardized financial gas and electric contracts; (3) North American Energy Standards Board agreements – standardized physical gas contracts; and (4) Edison Electric Institute Master Purchase and Sale Agreements – standardized power sales contracts in the electric industry.

Many of our forward purchase contracts contain provisions that require us to maintain an investment grade credit rating from each of the major credit rating agencies. If our credit rating were to fall below investment grade, the counterparties could require immediate payment or demand immediate and ongoing full overnight collateralization on contracts in net liability positions.

Interest Rate Swaps Designated as Cash Flow Hedges

We have previously used interest rate swaps designated as cash flow hedges to manage our interest rate exposures associated with new debt issuances. We have no interest rate swaps outstanding. These swaps were designated as cash flow hedges with the effective portion of gains and losses, net of associated deferred income tax effects, recorded in AOCI. We reclassify these gains from AOCI into interest on long-term debt during the periods in which the hedged interest payments occur. The following table shows the effect of these interest rate swaps previously terminated on the Financial Statements (in thousands):

Cash Flow HedgesLocation of Amount Reclassified from AOCI to IncomeAmount Reclassified from AOCI into Income during the Year Ended December 31, 2021
Interest rate contracts
Interest on long-term debt
$614 

A pre-tax loss of approximately $14.0 million is remaining in AOCI as of December 31, 2021, and we expect to reclassify approximately $0.6 million of pre-tax losses from AOCI into interest on long-term debt during the next twelve months. These amounts relate to terminated swaps.
(10)Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., an exit price). Measuring fair value requires the use of market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, corroborated by market data, or generally unobservable. Valuation techniques are required to maximize the use of observable inputs and minimize the use of unobservable inputs.

Applicable accounting guidance establishes a hierarchy that prioritizes the inputs used to measure fair value, and requires fair value measurements to be categorized based on the observability of those inputs. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 inputs) and the lowest priority to unobservable inputs (Level 3 inputs). The three levels of the fair value hierarchy are as follows:

Level 1 – Unadjusted quoted prices available in active markets at the measurement date for identical assets or liabilities;
Level 2 – Pricing inputs, other than quoted prices included within Level 1, which are either directly or indirectly observable as of the reporting date; and
Level 3 – Significant inputs that are generally not observable from market activity.
We classify assets and liabilities within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement of each individual asset and liability taken as a whole. Due to the short-term nature of cash and cash equivalents, accounts receivable, net, and accounts payable, the carrying amount of each such items approximates fair value. The table below sets forth by level within the fair value hierarchy the gross components of our assets and liabilities measured at fair value on a recurring basis. NPNS transactions are not included in the fair values by source table as they are not recorded at fair value. See Note 9 - Risk Management and Hedging Activities for further discussion.

We record transfers between levels of the fair value hierarchy, if necessary, at the end of the reporting period. There were no transfers between levels for the periods presented.

December 31, 2021Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)Significant Other Observable Inputs (Level 2)Significant Unobservable Inputs (Level 3)Margin Cash Collateral OffsetTotal Net Fair Value
(in thousands)
Special deposits$14,658 $— $— $— $14,658 
Rabbi trust investments18,234 — — — 18,234 
Total$32,892 $ $ $ $32,892 
December 31, 2020
Special deposits$9,670 $— $— $— $9,670 
Rabbi trust investments27,027 — — — 27,027 
Total$36,697 $ $ $ $36,697 

Special deposits represent amounts held in money market mutual funds. Rabbi trust investments represent assets held for non-qualified deferred compensation plans, which consist of our common stock and actively traded mutual funds with quoted prices in active markets.

Financial Instruments

The estimated fair value of financial instruments is summarized as follows (in thousands):

December 31, 2021December 31, 2020
Carrying AmountFair ValueCarrying AmountFair Value
Liabilities:
Long-term debt$2,552,660 $2,838,518 $2,328,637 $2,643,131 

The estimated fair value amounts have been determined using available market information and appropriate valuation methodologies; however, considerable judgment is required in interpreting market data to develop estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts that we would realize in a current market exchange.

We determined fair value for long-term debt based on interest rates that are currently available to us for issuance of debt with similar terms and remaining maturities, except for publicly traded debt, for which fair value is based on market prices for the same or similar issues or upon the quoted market prices of U.S. treasury issues having a similar term to maturity, adjusted for our bond issuance rating and the present value of future cash flows. These are significant other observable inputs, or level 2 inputs, in the fair value hierarchy.
(11)Unsecured Credit Facilities

Credit Facility

We have a $425 million Credit Facility which matures September 2, 2023. The Credit Facility includes uncommitted features that allow us to request up to two one-year extensions to the maturity date and increase the size by an additional $75 million with the consent of the lenders. The facility does not amortize and is unsecured. Borrowings may be made at interest rates equal to the Eurodollar rate, plus a margin of 112.5 to 175.0 basis points, or a base rate, plus a margin of 12.5 to 75.0 basis points. A total of ten banks participate in the facility, with no one bank providing more than 16 percent of the total availability. Commitment fees for the Credit Facility were $0.4 million and $0.6 million for the years ended December 31, 2021 and 2020.

The availability under the facilities in place for the years ended December 31 is shown in the following table (in millions):


2021

2020
Unsecured revolving line of credit, expiring September 2023$425.0 $425.0 
Unsecured revolving line of credit, expiring March 202325.0 25.0 

450.0 450.0 

Amounts outstanding at December 31:
Eurodollar borrowings373.0 222.0 
Letters of credit— — 
373.0 222.0 
Net availability as of December 31$77.0 $228.0 

The Credit Facility includes covenants that require us to meet certain financial tests, including a maximum debt to capitalization ratio not to exceed 65 percent. The facility also contains covenants which, among other things, limit our ability to engage in any consolidation or merger or otherwise liquidate or dissolve, dispose of property, and enter into transactions with affiliates. A default on the South Dakota or Montana First Mortgage Bonds would trigger a cross default on the Credit Facility; however, a default on the Credit Facility would not trigger a default on the South Dakota or Montana First Mortgage Bonds.
(12)Long-Term Debt

Long-term debt consisted of the following (in thousands):
December 31,

Due
2021

2020
Unsecured Debt:

Unsecured Revolving Line of Credit2023$373,000 $222,000 
Secured Debt:
Mortgage bonds—
South Dakota—5.01%202564,000 64,000 
South Dakota—4.15%204230,000 30,000 
South Dakota—4.30%205220,000 20,000 
South Dakota—4.85%204350,000 50,000 
South Dakota—4.22%204430,000 30,000 
South Dakota—4.26%204070,000 70,000 
South Dakota—3.21%203050,000 50,000 
South Dakota—2.80%202660,000 60,000 
South Dakota—2.66%202645,000 45,000 
Montana—5.71%203955,000 55,000 
Montana—5.01%2025161,000 161,000 
Montana—4.15%204260,000 60,000 
Montana—4.30%205240,000 40,000 
Montana—4.85%204315,000 15,000 
Montana—3.99%202835,000 35,000 
Montana—4.176%2044450,000 450,000 
Montana—3.11%202575,000 75,000 
Montana—4.11%2045125,000 125,000 
Montana—4.03%2047250,000 250,000 
Montana—3.98%2049150,000 150,000 
Montana—3.21%2030100,000 100,000 
Montana—1.00%2024100,000 — 
Pollution control obligations—
Montana—2.00%2023144,660 144,660 
Other Long Term Debt:
New Market Tax Credit Financing—1.146%2046— 26,977 
Total Long-Term Debt$2,552,660 $2,328,637 

Secured Debt

First Mortgage Bonds and Pollution Control Obligations

The South Dakota First Mortgage Bonds are a series of general obligation bonds issued under our South Dakota indenture. These bonds are secured by substantially all of our South Dakota and Nebraska electric and natural gas assets.

The Montana First Mortgage Bonds and Montana Pollution Control Obligations are secured by substantially all of our Montana electric and natural gas assets.

In May 2020, we issued $100 million principal amount of Montana First Mortgage Bonds and $50 million principal amount of South Dakota First Mortgage Bonds, each at a fixed interest rate of 3.21 percent maturing on May 15, 2030. These bonds were issued in a transaction exempt from the registration requirements of the Securities Act of 1933. Proceeds were
used to repay a portion of our outstanding borrowings under our revolving credit facilities and for other general corporate purposes. The bonds are secured by our electric and natural gas assets in Montana and South Dakota.

In March 2021, we issued and sold $100 million aggregate principal amount of Montana First Mortgage Bonds (the bonds) at a fixed interest rate of 1.00 percent maturing on March 26, 2024. The net proceeds were used to repay in full our outstanding $100 million term loan that was due April 2, 2021. We may redeem some or all of the bonds at any time in whole, or from time to time in part, at our option, on or after March 26, 2022, at a redemption price equal to 100% of the principal amount of the bonds to be redeemed, plus accrued and unpaid interest on the principal amount of the bonds being redeemed to, but excluding, the redemption date. The bonds are secured by our electric and natural gas assets in Montana and Wyoming.

As of December 31, 2021, we were in compliance with our financial debt covenants.

Other Long-Term Debt

In July 2021, our two loans totaling $27.0 million associated with the New Market Tax Credit (NMTC) financing agreement were extinguished. These loans were satisfied with our $18.2 million investment in the entities created in relation to the NMTC transaction, investor forgiveness of $7.9 million for substantially all of the benefits derived from the tax credits, and cash payment of $0.9 million. In accordance with our last rate case filing in the state of Montana, the portion of the loan forgiven, less unamortized debt issuance costs of $1.3 million, was recorded as a reduction to the cost of the office building associated with the NMTC financing agreement. This cash payment is reflected within the financing activities section of our Statement of Cash Flows for the year ended December 31, 2021; however, the remaining reduction to Long-term debt, Other investments, and Utility plant are non-cash financing activities that are not reflected within our Statement of Cash Flows for the year ended December 31, 2021.

Maturities of Long-Term Debt

The aggregate minimum principal maturities of long-term debt, during the next five years are $517.7 million in 2023, $100.0 million in 2024, $300.0 million in 2025 and $105.0 million in 2026.
(13)Related Party Transactions

Accounts receivable from and payables to associated companies primarily include intercompany billings for direct charges, overhead, and income tax obligations. The following table reflects our accounts receivable from and accounts payable to associated companies (in thousands):

December 31,

2021

2020
Accounts Receivable from Associated Companies:

Havre Pipeline Company, LLC$2,729 $1,673 
NorthWestern Energy Solutions, Inc.71 61 
Risk Partners Assurance, Ltd.18 18 
$2,818 $1,752 
Accounts Payable to Associated Companies:
Canadian Montana Pipeline Corporation$2,094 $1,846 
NorthWestern Services, LLC1,837 1,776 
$3,931 $3,622 
(14)Income Taxes

Our effective tax rate typically differs from the federal statutory tax rate primarily due to the regulatory impact of flowing through the federal and state tax benefit of repairs deductions, state tax benefit of accelerated tax depreciation deductions (including bonus depreciation when applicable) and production tax credits. The regulatory accounting treatment of these deductions requires immediate income recognition for temporary tax differences of this type, which is referred to as the flow-through method. When the flow-through method of accounting for temporary differences is reflected in regulated revenues, we record deferred income taxes and establish related regulatory assets and liabilities.

The components of the net deferred income tax assets and liabilities recognized in our Balance Sheets are related to the following temporary differences (in thousands):

December 31,

2021

2020
Production tax credit$75,092 $63,542 
Pension / postretirement benefits21,435 31,866 
Customer advances21,271 17,165 
Unbilled revenue10,704 14,429 
Compensation accruals10,612 11,748 
Environmental liability5,704 6,039 
Reserves and accruals5,105 6,265 
Interest rate hedges3,158 3,171 
NOL carryforward— 8,468 
Other, net7,833 8,142 
Deferred Tax Asset160,914 170,835 
Excess tax depreciation(431,345)(416,898)
Flow through depreciation(92,502)(80,938)
Goodwill amortization(91,689)(91,647)
Regulatory assets and other(53,896)(53,449)
Deferred Tax Liability(669,432)(642,932)
Deferred Tax Liability, net$(508,518)$(472,097)

Uncertain Tax Positions

We recognize tax positions that meet the more-likely-than-not threshold as the largest amount of tax benefit that is greater than 50 percent likely of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. The change in unrecognized tax benefits is as follows (in thousands):


2021

2020
Unrecognized Tax Benefits at January 1$33,491 $35,085 
Gross increases - tax positions in prior period293 120 
Gross increases - tax positions in current period— — 
Gross decreases - tax positions in current period(1,735)(1,714)
Lapse of statute of limitations— — 
Unrecognized Tax Benefits at December 31$32,049 $33,491 
Our unrecognized tax benefits include approximately $28.1 million and $28.0 million related to tax positions as of December 31, 2021 and 2020 that if recognized, would impact our annual effective tax rate. We do not anticipate that total unrecognized tax benefits will significantly change due to the settlement of audits or the expiration of statutes of limitation within the next twelve months.

Our policy is to recognize interest related to uncertain tax positions in interest expense. As of December 31, 2021, we have accrued $0.5 million for the payment of interest in the Balance Sheets. As of December 31, 2020, we did not have any amounts accrued for the payment of interest.

Tax years 2018 and forward remain subject to examination by the IRS and state taxing authorities.
(15)Comprehensive Income (Loss)

The following tables display the components of Other Comprehensive Income (Loss), after-tax, and the related tax effects (in thousands):

December 31,
20212020
Before-
Tax Amount
Tax
Expense (Benefit)
Net-of-
Tax Amount
Before-
Tax Amount
Tax
Expense (Benefit)
Net-of-
Tax Amount
Foreign currency translation adjustment$(58)$— $(58)$88 $— $88 
Reclassification of net income (loss) on derivative instruments614 (162)452 614 (162)452 
Postretirement medical liability adjustment(585)149 (436)2,462 (623)1,839 
Other comprehensive income (loss)$(29)$(13)$(42)$3,164 $(785)$2,379 


Balances by classification included within AOCI on the Balance Sheets are as follows, net of tax (in thousands):

December 31,

2021

2020
Foreign currency translation$1,443 $1,501 
Derivative instruments designated as cash flow hedges(8,127)(8,579)
Postretirement medical plans1,516 1,952 
Accumulated other comprehensive loss$(5,168)$(5,126)
The following table displays the changes in AOCI by component, net of tax (in thousands):

December 31, 2021
Year Ended
Affected Line Item in the Statements of Income
Interest Rate Derivative Instruments Designated as
Cash Flow
Hedges
Postretirement Medical PlansForeign Currency Translation

Total
Beginning balance$(8,579)$1,952 $1,501 $(5,126)
Other comprehensive income before reclassifications(58)(58)
Amounts reclassified from AOCI
Interest on
long-term debt
452 452 
Amounts reclassified from AOCI(436)(436)
Net current-period other comprehensive income452 (436)(58)(42)
Ending Balance$(8,127)$1,516 $1,443 $(5,168)

December 31, 2020
Year Ended
Affected Line Item in the Statements of Income
Interest
Rate
Derivative Instruments Designated
as Cash
Flow Hedges
Postretirement Medical PlansForeign Currency Translation

Total
Beginning balance$(9,031)$113 $1,413 $(7,505)
Other comprehensive income before reclassifications88 88 
Amounts reclassified from AOCI
Interest on
long-term debt
452 452 
Amounts reclassified from AOCI1,839 1,839 
Net current-period other comprehensive income452 1,839 88 2,379 
Ending Balance$(8,579)$1,952 $1,501 $(5,126)
(16)Employee Benefit Plans

Pension and Other Postretirement Benefit Plans

We sponsor and/or contribute to pension and postretirement health care and life insurance benefit plans for eligible employees. The pension plan for our South Dakota and Nebraska employees is referred to as the NorthWestern Corporation plan, and the pension plan for our Montana employees is referred to as the NorthWestern Energy plan, and collectively they are referred to as the Plans. We utilize a number of accounting mechanisms that reduce the volatility of reported pension
costs. Differences between actuarial assumptions and actual plan results are deferred and are recognized into earnings only when the accumulated differences exceed 10 percent of the greater of the projected benefit obligation or the market-related value of plan assets. If necessary, the excess is amortized over the average remaining service period of active employees. The Plans' funded status is recognized as an asset or liability in our Financial Statements. See Note 5 - Regulatory Assets and Liabilities, for further discussion on how these costs are recovered through rates charged to our customers.

Benefit Obligation and Funded Status

Following is a reconciliation of the changes in plan benefit obligations and fair value of plan assets, and a statement of the funded status (in thousands):

Pension BenefitsOther Postretirement Benefits
December 31,December 31,

2021

20202021

2020
Change in benefit obligation:
Obligation at beginning of period$820,979 $735,564 $19,146 $20,272 
Service cost12,994 11,116 407 370 
Interest cost18,759 22,840 317 492 
Actuarial loss(28,905)84,479 415 123 
Settlements(1)
(93,488)— — 390 
Benefits paid(33,537)(33,020)(2,977)(2,501)
Benefit Obligation at End of Period$696,802 $820,979 $17,308 $19,146 
Change in Fair Value of Plan Assets:
Fair value of plan assets at beginning of period$688,456 $609,000 $23,096 $21,479 
Return on plan assets33,868 101,075 3,349 2,723 
Employer contributions10,200 11,401 1,821 1,395 
Settlements(1)
(93,488)— — — 
Benefits paid(33,537)(33,020)(2,977)(2,501)
Fair value of plan assets at end of period$605,499 $688,456 $25,289 $23,096 
Funded Status$(91,303)$(132,523)$7,981 $3,950 
Amounts Recognized in the Balance Sheet Consist of:
Noncurrent asset8,297 7,001 11,914 8,436 
Total Assets8,297 7,001 11,914 8,436 
Current liability(11,200)(11,200)(1,575)(1,712)
Noncurrent liability(88,400)(128,324)(2,358)(2,774)
Total Liabilities(99,600)(139,524)(3,933)(4,486)
Net amount recognized$(91,303)$(132,523)$7,981 $3,950 
Amounts Recognized in Regulatory Assets Consist of:
Prior service credit— — 1,870 3,857 
Net actuarial loss(62,448)(115,987)1,366 (497)
Amounts recognized in AOCI consist of:
Prior service cost— — (95)(246)
Net actuarial gain— — 2,500 3,246 
Total$(62,448)$(115,987)$5,641 $6,360 
(1) In December 2021, we entered into a group annuity contract from an insurance company to provide for the payment of pension benefits to 1,062 NorthWestern Energy Pension Plan participants. We purchased the contract with $93.5 million of plan assets. The insurance company took over the payments of these benefits starting January 1, 2022. This transaction settled $93.5 million of our NorthWestern Energy Pension Plan obligation. As a result of this transaction, during the twelve months ended December 31, 2021, we recorded a non-cash, non-operating settlement charge of $11.3 million. This charge is recorded within operating expenses, net on the Statements of Income. As discussed within Note 5 – Regulatory Assets and Liabilities, this charge was deferred as a regulatory asset on the Balance Sheets, with a corresponding decrease to operating expenses on the Statements of Income.

The actuarial gain/loss is primarily due to the change in discount rate assumption and actual asset returns compared with expected amounts. The total projected benefit obligation and fair value of plan assets for the pension plans with accumulated benefit obligations in excess of plan assets were as follows (in millions):

NorthWestern Energy Pension Plan
December 31,

2021

2020
Projected benefit obligation$636.3 $757.4 
Accumulated benefit obligation636.3 757.4 
Fair value of plan assets(1)
537.9 619.1 
_____________________
As of December 31, 2021, the fair value of the NorthWestern Corporation pension plan assets exceed the total projected and accumulated benefit obligation and are therefore excluded from this table.

(1) Fair value of plan assets was impacted by the group annuity contract discussed above.

Net Periodic Cost (Credit)

The components of the net costs (credits) for our pension and other postretirement plans are as follows (in thousands):

Pension Benefits
Other Postretirement
Benefits
December 31,December 31,

2021

20202021

2020
Components of Net Periodic Benefit Cost
Service cost$12,994 $11,116 $407 $370 
Interest cost18,759 22,840 327 492 
Expected return on plan assets(27,061)(26,162)(919)(983)
Amortization of prior service cost (credit)— — (1,835)(1,882)
Recognized actuarial loss (gain)6,536 5,028 (898)(61)
Settlement loss recognized(1)
11,291 — — 390 
Net Periodic Benefit Cost (Credit)$22,519 $12,822 $(2,918)$(1,674)
Regulatory deferral of net periodic benefit cost(2)
(13,308)(2,100)— — 
Previously deferred costs recognized(2)
— 71 709 861 
Amount Recognized in Income$9,211 $10,793 $(2,209)$(813)
_________________________
(1) Settlement loss is related to partial annuitization of NorthWestern Energy Pension Plan effective December 1, 2021.
(2) Net periodic benefit costs for pension and postretirement benefit plans are recognized for financial reporting based on the authorization of each regulatory jurisdiction in which we operate. A portion of these costs are recorded in regulatory assets and recognized in the Statements of Income as those costs are recovered through customer rates.

For purposes of calculating the expected return on pension plan assets, the market-related value of assets is used, which is based upon fair value. The difference between actual plan asset returns and estimated plan asset returns are amortized equally over a period not to exceed five years.

Actuarial Assumptions

The measurement dates used to determine pension and other postretirement benefit measurements for the plans are December 31, 2021 and 2020. The actuarial assumptions used to compute net periodic pension cost and postretirement benefit cost are based upon information available as of the beginning of the year, specifically, market interest rates, past experience and management's best estimate of future economic conditions. Changes in these assumptions may impact future benefit costs and obligations. In computing future costs and obligations, we must make assumptions about such things as employee mortality and turnover, expected salary and wage increases, discount rate, expected return on plan assets, and expected future cost increases. Two of these assumptions have the most impact on the level of cost: (1) discount rate and (2) expected rate of return on plan assets.

On an annual basis, we set the discount rate using a yield curve analysis. This analysis includes constructing a hypothetical bond portfolio whose cash flow from coupons and maturities matches the year-by-year, projected benefit cash flow from our plans. The increase in the discount rate during 2021 decreased our projected benefit obligation by approximately $45.1 million.

In determining the expected long-term rate of return on plan assets, we review historical returns, the future expectations for returns for each asset class weighted by the target asset allocation of the pension and postretirement portfolios, and long-term inflation assumptions. Based on the target asset allocation for our pension assets and future expectations for asset returns, we increased our long term rate of return on assets assumption for NorthWestern Energy Pension Plan to 4.26 percent and decreased our assumption on the NorthWestern Corporation Pension Plan to 2.66 percent for 2022.

The weighted-average assumptions used in calculating the preceding information are as follows:

Pension Benefits
Other Postretirement
Benefits
December 31,December 31,

2021

20202021

2020
Discount rate2.65-2.75%2.20-2.30%2.35-2.40%1.8%
Expected rate of return on assets3.01-4.173.45-4.494.08 4.71 
Long-term rate of increase in compensation levels (non-union)
2.84 2.84 2.84 2.84 
Long-term rate of increase in compensation levels (union)2.00 2.00 2.00 2.00 
Interest crediting rate3.30-6.003.30-6.00N/AN/A

The postretirement benefit obligation is calculated assuming that health care costs increase by a 5.00 percent fixed rate. The company contribution toward the premium cost is capped, therefore future health care cost trend rates are expected to have a minimal impact on company costs and the accumulated postretirement benefit obligation.

Investment Strategy
Our investment goals with respect to managing the pension and other postretirement assets are to meet current and future benefit payment needs while maximizing total investment returns (income and appreciation) after inflation within the constraints of diversification, prudent risk taking, Prudent Man Rule of the Employee Retirement Income Security Act of 1974 and liability-based considerations. Each plan is diversified across asset classes to achieve optimal balance between risk and return and between income and growth through capital appreciation. Our investment philosophy is based on the following:

Each plan should be substantially invested as long-term cash holdings reduce long-term rates of return;
Pension Plan portfolio risk is described by volatility in the funded status of the Plans;
It is prudent to diversify each plan across the major asset classes;
Equity investments provide greater long-term returns than fixed income investments, although with greater short-term volatility;
Fixed income investments of the plans should strongly correlate with the interest rate sensitivity of the plan’s aggregate liabilities in order to hedge the risk of change in interest rates negatively impacting the pension plans overall funded status, (such assets will be described as Liability Hedging Fixed Income assets);
Allocation to foreign equities increases the portfolio diversification and thereby decreases portfolio risk while providing for the potential for enhanced long-term returns;
Active management can reduce portfolio risk and potentially add value through security selection strategies;
A portion of plan assets should be allocated to passive, indexed management funds to provide for greater diversification and lower cost; and
It is appropriate to retain more than one investment manager, provided that such managers offer asset class or style diversification.

Investment risk is measured and monitored on an ongoing basis through quarterly investment portfolio reviews, annual liability measurements, and periodic asset/liability studies.

The most important component of an investment strategy is the portfolio asset mix, or the allocation between the various classes of securities available. The mix of assets is based on an optimization study that identifies asset allocation targets in order to achieve the maximum return for an acceptable level of risk, while minimizing the expected contributions and pension and postretirement expense. In the optimization study, assumptions are formulated about characteristics, such as expected asset class investment returns, volatility (risk), and correlation coefficients among the various asset classes, and making adjustments to reflect future conditions expected to prevail over the study period. Based on this, the target asset allocation established, within an allowable range of plus or minus 5 percent, is as follows:

NorthWestern Energy
Pension
NorthWestern
Corporation Pension
NorthWestern Energy
Health and Welfare
December 31,December 31,December 31,

2021

20202021

20202021

2020
Fixed income securities55.0 %55.0 %90.0 %80.0 %40.0 %40.0 %
Non-U.S. fixed income securities4.0 4.0 1.0 2.0 — — 
Global equities41.0 41.0 9.0 18.0 60.0 60.0 

The actual allocation by plan is as follows:
NorthWestern Energy
Pension
NorthWestern
Corporation Pension
NorthWestern Energy
Health and Welfare
December 31,December 31,December 31,

2021

20202021

20202021

2020
Cash and cash equivalents0.1 %— %0.4 %0.7 %0.1 %1.0 %
Fixed income securities53.8 52.7 89.5 77.3 33.7 37.9 
Non-U.S. fixed income securities3.9 3.8 0.9 2.6 — — 
Global equities42.2 43.5 9.2 19.4 66.2 61.1 
100.0 %100.0 %100.0 %100.0 %100.0 %100.0 %

Generally, the asset mix will be rebalanced to the target mix as individual portfolios approach their minimum or maximum levels. Debt securities consist of U.S. and international instruments. Core domestic portfolios can be invested in government, corporate, asset-backed and mortgage-backed obligation securities. While the portfolio may invest in high yield securities, the average quality must be rated at least “investment grade" by rating agencies. Performance of fixed income investments is measured by both traditional investment benchmarks as well as relative changes in the present value of the plan's liabilities. Equity investments consist primarily of U.S. stocks including large, mid and small cap stocks, which are diversified across investment styles such as growth and value. We also invest in global equities with exposure to developing and emerging markets. Derivatives, options and futures are permitted for the purpose of reducing risk but may not be used for speculative purposes.

Our plan assets are primarily invested in common collective trusts (CCTs), which are invested in equity and fixed income securities. In accordance with our investment policy, these pooled investment funds must have an adequate asset base relative to their asset class and be invested in a diversified manner and have a minimum of three years of verified investment performance experience or verified portfolio manager investment experience in a particular investment strategy and have management and oversight by an investment advisor registered with the Securities and Exchange Commission (SEC). Investments in a collective investment vehicle are valued by multiplying the investee company’s net asset value per share with the number of units or shares owned at the valuation date. Net asset value per share is determined by the trustee. Investments held by the CCT, including collateral invested for securities on loan, are valued on the basis of valuations furnished by a pricing service approved by the CCT’s investment manager, which determines valuations using methods based on quoted closing market prices on national securities exchanges, or at fair value as determined in good faith by the CCT’s investment manager if applicable. The funds do not contain any redemption restrictions. The direct holding of NorthWestern Corporation stock is not permitted; however, any holding in a diversified mutual fund or collective investment fund is permitted. During 2019, due to proposed changes in the John Hancock participating group annuity contract held by the NorthWestern Corporation plan, we elected to discontinue the contract effective January 1, 2020.

Cash Flows

In accordance with the Pension Protection Act of 2006 (PPA), and the relief provisions of the Worker, Retiree, and Employer Recovery Act of 2008 (WRERA), we are required to meet minimum funding levels in order to avoid required contributions and benefit restrictions. We have elected to use asset smoothing provided by the WRERA, which allows the use of asset averaging, including expected returns (subject to certain limitations), for a 24-month period in the determination of funding requirements. Additional funding relief was passed in the American Rescue Plan Act of 2021, providing for longer amortization and interest rate smoothing, which we elected to use. We expect to continue to make contributions to the pension plans in 2022 and future years that reflect the minimum requirements and discretionary amounts consistent with the amounts recovered in rates. Additional legislative or regulatory measures, as well as fluctuations in financial market conditions, may impact our funding requirements.

Due to the regulatory treatment of pension costs in Montana, pension expense for 2021 and 2020 was based on actual contributions to the plan. Annual contributions to each of the pension plans are as follows (in thousands):

2021

2020
NorthWestern Energy Pension Plan (MT)$9,000 $10,201 
NorthWestern Corporation Pension Plan (SD and NE)1,200 1,200 
$10,200 $11,401 

We estimate the plans will make future benefit payments to participants as follows (in thousands):


Pension Benefits

Other Postretirement Benefits
2022$28,842 $2,579 
202330,368 2,296 
202431,933 1,952 
202533,410 1,435 
202634,692 1,381 
2027-2031183,671 5,352 

Defined Contribution Plan

Our defined contribution plan permits employees to defer receipt of compensation as provided in Section 401(k) of the Internal Revenue Code. Under the plan, employees may elect to direct a percentage of their gross compensation to be contributed to the plan. We contribute various percentage amounts of the employee's gross compensation contributed to the plan. Matching contributions for the years ended December 31, 2021 and 2020 were $11.8 million and $11.1 million, respectively.
(17)Stock-Based Compensation

We grant stock-based awards through our Amended and Restated Equity Compensation Plan (ECP), which includes restricted stock awards and performance share awards. As of December 31, 2021, there were 828,486 shares of common stock remaining available for grants. The remaining vesting period for awards previously granted ranges from one to five years if the service and/or performance requirements are met. Nonvested shares do not receive dividend distributions. The long-term incentive plan provides for accelerated vesting in the event of a change in control.

We account for our share-based compensation arrangements by recognizing compensation costs for all share-based awards over the respective service period for employee services received in exchange for an award of equity or equity-based compensation. The compensation cost is based on the fair value of the grant on the date it was awarded.

Performance Unit Awards

Performance unit awards are granted annually under the ECP. These awards vest at the end of the three-year performance period if we have achieved certain performance goals and the individual remains employed by us. The exact number of shares issued will vary from 0 percent to 200 percent of the target award, depending on actual company performance relative to the performance goals. These awards contain both market- and performance-based components. The performance goals are independent of each other and equally weighted, and are based on two metrics: (i) EPS growth level and average return on equity; and (ii) total shareholder return (TSR) relative to a peer group.

Fair value is determined for each component of the performance unit awards. The fair value of the earnings per share component is estimated based upon the closing market price of our common stock as of the date of grant less the present
value of expected dividends, multiplied by an estimated performance multiple determined on the basis of historical experience, which is subsequently trued up at vesting based on actual performance. The fair value of the TSR portion is estimated using a statistical model that incorporates the probability of meeting performance targets based on historical returns relative to the peer group. The following summarizes the significant assumptions used to determine the fair value of performance shares and related compensation expense as well as the resulting estimated fair value of performance shares granted:


2021

2020
Risk-free interest rate0.19 %1.42 %
Expected life, in years33
Expected volatility28.2% to 38.5%14.9% to 19.7%
Dividend yield4.3 %3.1 %

The risk-free interest rate was based on the U.S. Treasury yield of a three-year bond at the time of grant. The expected term of the performance shares is three years based on the performance cycle. Expected volatility was based on the historical volatility for the peer group. Both performance goals are measured over the three-year vesting period and are charged to compensation expense over the vesting period based on the number of shares expected to vest.

A summary of nonvested shares as of and changes during the year ended December 31, 2021, are as follows:

Performance Unit Awards

Shares

Weighted-Average Grant-Date
Fair Value
Beginning nonvested grants130,571 $66.27 
Granted104,927 $50.53 
Vested(69,867)$60.41 
Forfeited(3,108)$59.14 
Remaining nonvested grants162,523 $58.76 

We recognized compensation expense of $3.9 million and $2.2 million for the years ended December 31, 2021 and 2020, respectively, and related income tax benefit of $(0.2) million and $(0.6) million for the years ended December 31, 2021 and 2020, respectively. As of December 31, 2021, we had $5.7 million of unrecognized compensation cost related to the nonvested portion of outstanding awards, which is reflected as nonvested stock as a portion of additional paid in capital in our Statements of Common Shareholders' Equity. The cost is expected to be recognized over a weighted-average period of 2 years. The total fair value of shares vested was $4.2 million and $5.1 million for the years ended December 31, 2021 and 2020, respectively.

Retirement/Retention Restricted Share Awards

In December 2011, an executive retirement / retention program was established that provides for the annual grant of restricted share units. These awards are subject to a five-year performance and vesting period. The performance measure for these awards requires net income for the calendar year of at least three of the five full calendar years during the performance period to exceed net income for the calendar year the awards are granted. Once vested, the awards will be paid out in shares of common stock in five equal annual installments after a recipient has separated from service. The fair value of these awards is measured based upon the closing market price of our common stock as of the date of grant less the present value of expected dividends.

A summary of nonvested shares as of and changes during the year ended December 31, 2021, are as follows:

Shares

Weighted-Average Grant-Date
Fair Value
Beginning nonvested grants77,967 $50.86 
Granted24,385 43.29 
Vested(15,033)45.78 
Forfeited— — 
Remaining nonvested grants87,319 $49.63 

Director's Deferred Compensation

Nonemployee directors may elect to defer up to 100 percent of any qualified compensation that would be otherwise payable to him or her, subject to compliance with our 2005 Deferred Compensation Plan for Nonemployee Directors and Section 409A of the Internal Revenue Code. The deferred compensation may be invested in NorthWestern stock or in designated investment funds. Compensation deferred in a particular month is recorded as a deferred stock unit (DSU) on the first of the following month based on the closing price of NorthWestern stock or the designated investment fund. The DSUs are marked-to-market on a quarterly basis with an adjustment to director’s compensation expense. Based on the election of the nonemployee director, following separation from service on the Board, other than on account of death, he or she shall be paid a distribution either in a lump sum or in approximately equal installments over a designated number of years (not to exceed 10 years).

Following is a summary of the components of DSUs issued and compensation expense attributable to the DSUs (in millions, except DSU amounts):

December 31,

2021

2020
DSUs Issued18,741 21,434 
Compensation expense1.1 1.5 
Change in value of shares1.3 (2.9)
Total compensation (benefit) expense$2.4 $(1.4)
DSUs withdrawn186,137 613 
Value of DSUs withdrawn$12.1 $0.1 
(18)Common Stock

We have 250,000,000 shares authorized consisting of 200,000,000 shares of common stock with a $0.01 par value and 50,000,000 shares of preferred stock with a $0.01 par value. Of these shares, 2,865,957 shares of common stock are reserved for the incentive plan awards. For further detail of grants under this plan see Note 17 - Stock-Based Compensation.

Repurchase of Common Stock

Shares tendered by employees to us to satisfy the employees' tax withholding obligations in connection with the vesting of restricted stock awards totaled 16,880 and 35,378 during the years ended December 31, 2021 and 2020, respectively, and
are reflected in reacquired capital stock. These shares were credited to reacquired capital stock based on their fair market value on the vesting date.

Issuance of Common Stock

In April 2021, we entered into an Equity Distribution Agreement with BofA Securities, Inc., CIBC World Markets Corp, Credit Suisse Securities (USA) LLC, and J.P. Morgan Securities LLC, collectively the sales agents, pursuant to which we may offer and sell shares of our common stock from time to time, having an aggregate gross sales price of up to $200.0 million, through an At-the-Market (ATM) offering program, including an equity forward sales component. This is a three-year agreement, expiring on February 11, 2024. During the twelve months ended December 31, 2021, we issued 1,966,117 shares of our common stock under the ATM program at an average price of $63.81, for net proceeds of $124.2 million, which is net of sales commissions and other fees paid of approximately $1.3 million. We do not anticipate needing to issue equity through the ATM program during 2022.

On November 17, 2021, we announced a registered public offering of 6,074,767 shares of our common stock at a public offering price of $53.50 per share, for an issuance amount of $325.0 million. In conjunction with this offering, we granted the underwriters an option to purchase up to 911,215 additional shares, which was subsequently exercised in full, for an additional issuance amount of $48.8 million. Of the total 6,985,982 shares of common stock offered, we initially sold 1,401,869 shares, $75.0 million in gross proceeds, directly to the underwriters in the offering, with cash proceeds received at closing. The remaining 5,584,113 shares were sold under forward sales agreements which provide for settlement on a settlement date or dates to be specified at our discretion, but which is expected to occur on or prior to February 28, 2023. The cumulative shares issued under the forward sales agreement is limited to one and one-half times the base number of shares within the agreement, or 8,376,170 shares.

The forward sales agreements will be physically settled with common shares issued by us, unless we elect to settle the agreements in cash or to net share settle the agreements, subject to certain conditions. On a settlement date or dates, if we decide to physically settle the forward sales agreement, we will issue shares of common stock to the forward purchaser at the then-applicable forward sale price and receive issuance proceeds at that time. The forward sale price will initially be $51.8950 per share, which is subject to adjustment based on a floating interest rate factor equal to the overnight bank funding rate less a spread of 75 basis points, and will be subject to decrease on certain dates specified in the forward sale agreement by amounts related to expected dividends on shares of common stock during the term of the forward sale agreement.

At December 31, 2021, we could have settled the forward sale agreement with physical delivery of 5,584,113 shares of common stock to the counterparty in exchange for cash of $286.1 million. The forward sale could have also been settled at December 31, 2021, with delivery of approximately $24.2 million of cash or approximately 435,522 shares of common stock to the counterparty, if we had elected to net cash or net share settle, respectfully.

The forward sale agreement has been classified as an equity transaction because it is indexed to our common stock, physical settlement is within our control, and the other requirements necessary for equity classification are met. As a result of the equity classification, no gain or loss will be recognized within earnings due to subsequent changes in the fair value of the forward sales agreement.
(19)Commitments and Contingencies

Qualifying Facilities Liability

Our QF liability primarily consists of unrecoverable costs associated with three contracts covered under the Public Utility Regulatory Practices Act (PURPA). These contracts require us to purchase minimum amounts of energy at prices ranging from $64 to $136 per MWH through 2029. As of December 31, 2021, our estimated gross contractual obligation related to these contracts was approximately $466.9 million through 2029. A portion of the costs incurred to purchase this energy is recoverable through rates, totaling approximately $388.4 million through 2029. As contractual obligations are settled, the related purchases and sales are recorded within Operation expenses and Operating revenues in our Statements of
Income. The present value of the remaining liability is recorded in Accumulated miscellaneous operating provisions in our Balance Sheets. The following summarizes the change in the liability (in thousands):

December 31,

2021

2020
Beginning QF liability$81,379 $92,937 
Settlements(1)
(22,497)(18,665)
Interest on long-term debt6,061 7,107 
Ending QF liability$64,943 $81,379 
______________________
(1) The settlements amount includes (i) a higher periodic adjustment of $4.3 million due to actual price escalation, which was more than previously modeled; (ii) lower costs of approximately $1.7 million, due to a $2.6 million reduction in costs for the adjustment to actual output and pricing for the current contract year as compared with a $0.9 million reduction in costs in the prior period; and (iii) a favorable adjustment of approximately $7.0 million decreasing the QF liability associated with a one-time clarification in contract term.

The following summarizes the estimated gross contractual obligation less amounts recoverable through rates (in thousands):


Gross
Obligation

Recoverable
Amounts
Net
2022$80,355 $60,639 $19,716 
202382,452 61,280 21,172 
202475,113 60,706 14,407 
202560,360 52,950 7,410 
202655,393 46,274 9,119 
Thereafter113,199 106,563 6,636 
Total(1)
$466,872 $388,412 $78,460 
_____________________
(1) This net unrecoverable amount represents the undiscounted difference between the total gross obligations and recoverable amounts. The ending QF liability in the table above represents the present value of this net unrecoverable amount.

Long Term Supply and Capacity Purchase Obligations

We have entered into various commitments, largely purchased power, electric transmission, coal and natural gas supply and natural gas transportation contracts. These commitments range from one to 24 years. Costs incurred under these contracts are included in Operating expenses in the Statements of Income and were approximately $286.7 million and $206.6 million for the years ended December 31, 2021 and 2020, respectively. As of December 31, 2021, our commitments under these contracts were $283.2 million in 2022, $269.7 million in 2023, $221.8 million in 2024, $219.4 million in 2025, $172.2 million in 2026, and $1.5 billion thereafter. These commitments are not reflected in our Financial Statements.

Hydroelectric License Commitments

With the 2014 purchase of hydroelectric generating facilities and associated assets located in Montana, we assumed two Memoranda of Understanding (MOUs) existing with state, federal and private entities. The MOUs are periodically updated and renewed and require us to implement plans to mitigate the impact of the projects on fish, wildlife and their habitats, and to increase recreational opportunities. The MOUs were created to maximize collaboration between the parties and enhance the possibility to receive matching funds from relevant federal agencies. Under these MOUs, we have a remaining
commitment to spend approximately $26.7 million between 2022 and 2040. These commitments are not reflected in our Financial Statements.

ENVIRONMENTAL LIABILITIES AND REGULATION

Environmental Matters

The operation of electric generating, transmission and distribution facilities, and gas gathering, storage, transportation and distribution facilities, along with the development (involving site selection, environmental assessments, and permitting) and construction of these assets, are subject to extensive federal, state, and local environmental and land use laws and regulations. Our activities involve compliance with diverse laws and regulations that address emissions and impacts to the environment, including air and water, protection of natural resources, avian and wildlife. We monitor federal, state, and local environmental initiatives to determine potential impacts on our financial results. As new laws or regulations are implemented, our policy is to assess their applicability and implement the necessary modifications to our facilities or their operation to maintain ongoing compliance.

Our environmental exposure includes a number of components, including remediation expenses related to the cleanup of current or former properties, and costs to comply with changing environmental regulations related to our operations. At present, our environmental reserve, which relates primarily to the remediation of former manufactured gas plant sites owned by us or for which we are responsible, is estimated to range between $24.1 million to $30.7 million. As of December 31, 2021, we had a reserve of approximately $26.9 million, which has not been discounted. Environmental costs are recorded when it is probable we are liable for the remediation and we can reasonably estimate the liability. We use a combination of site investigations and monitoring to formulate an estimate of environmental remediation costs for specific sites. Our monitoring procedures and development of actual remediation plans depend not only on site specific information but also on coordination with the different environmental regulatory agencies in our respective jurisdictions; therefore, while remediation exposure exists, it may be many years before costs are incurred.

Over time, as costs become determinable, we may seek authorization to recover such costs in rates or seek insurance reimbursement as available and applicable; therefore, although we cannot guarantee regulatory recovery, we do not expect these costs to have a material effect on our financial position or results of operations.

The following summarizes the change in our environmental liability (in thousands):

December 31,

2021

2020
Liability at January 1,$28,895 $30,276 
Deductions(2,799)(2,977)
Charged to costs and expense770 1,596 
Liability at December 31,$26,866 $28,895 

Over time, as costs become determinable, we may seek authorization to recover such costs in rates or seek insurance reimbursement as available and applicable; therefore, although we cannot guarantee regulatory recovery, we do not expect these costs to have a material effect on our financial position or results of operations.

Manufactured Gas Plants - Approximately $22.1 million of our environmental reserve accrual is related to the following manufactured gas plants.

South Dakota - A formerly operated manufactured gas plant located in Aberdeen, South Dakota, has been identified on the Federal Comprehensive Environmental Response, Compensation, and Liability Information System list as contaminated with coal tar residue. We are currently conducting feasibility studies, implementing remedial actions pursuant to work plans
approved by the South Dakota Department of Agriculture and Natural Resources, and conducting ongoing monitoring and operation and maintenance activities. As of December 31, 2021, the reserve for remediation costs at this site was approximately $8.1 million, and we estimate that approximately $3.0 million of this amount will be incurred through 2025.

Nebraska - We own sites in North Platte, Kearney, and Grand Island, Nebraska on which former manufactured gas facilities were located. We are currently working independently to fully characterize the nature and extent of potential impacts associated with these Nebraska sites. Our reserve estimate includes assumptions for site assessment and remedial action work. At present, we cannot determine with a reasonable degree of certainty the nature and timing of any risk-based remedial action at our Nebraska locations.

Montana - We own or have responsibility for sites in Butte, Missoula, and Helena, Montana on which former manufactured gas plants were located. The Butte and Helena sites, both listed as high priority sites on Montana’s state superfund list, were placed into the Montana Department of Environmental Quality (MDEQ) voluntary remediation program for cleanup due to soil and groundwater impacts. Soil and coal tar were removed at the sites in accordance with the MDEQ requirements. Groundwater monitoring is conducted semiannually at both sites. At this time, we cannot estimate with a reasonable degree of certainty the nature and timing of additional remedial actions and/or investigations, if any, at the Butte site.

In August 2016, the MDEQ sent us a Notice of Potential Liability and Request for Remedial Action regarding the Helena site. In October 2019, we submitted a third revised Remedial Investigation Work Plan (RIWP) for the Helena site addressing MDEQ comments. The MDEQ approved the RIWP in March 2020 and we expect work at the Helena site to continue into 2022.

MDEQ has indicated it expects to proceed in listing the Missoula site as a Montana superfund site. After researching historical ownership, we have identified another potentially responsible party with whom we have entered into an agreement allocating third-party costs to be incurred in addressing the site. The other party has assumed the lead role at the site and has submitted a voluntary remediation plan for the Missoula site to MDEQ. At this time, we cannot estimate with a reasonable degree of certainty the nature and timing of risk-based remedial action, if any, at the Missoula site.

Global Climate Change - National and international actions have been initiated to address global climate change and the contribution of greenhouse gas (GHG) including, most significantly, carbon dioxide (CO2). These actions include legislative proposals, Executive and Environmental Protection Agency (EPA) actions at the federal level, state level activity, investor activism and private party litigation relating to GHG emissions. Coal-fired plants have come under particular scrutiny due to their level of GHG emissions. We have joint ownership interests in four coal-fired electric generating plants, all of which are operated by other companies. We are responsible for our proportionate share of the capital and operating costs while being entitled to our proportionate share of the power generated.

While numerous bills have been introduced that address climate change from different perspectives, Congress has not passed any federal climate change legislation regarding GHG emissions from coal fired plants, and we cannot predict the timing or form of any potential legislation. In 2019, the EPA finalized the Affordable Clean Energy Rule (ACE), which repealed the 2015 Clean Power Plan (CPP) in regulating GHG emissions from coal-fired plants. The U.S. Court of Appeals for the District of Columbia Circuit issued an opinion on January 19, 2021, vacating the ACE and remanding it to EPA for further action. The United States Supreme Court agreed to review the case in October 2021 and oral argument regarding the scope of EPA’s authority to regulate GHG emissions is scheduled to take place February 28, 2022, with a decision expected the following summer. It also is widely expected that the Biden Administration will develop an alternative plan for reducing GHG emissions from coal-fired plants, and in a memorandum dated February 12, 2021, EPA stated its belief that the January 19, 2021 opinion left neither the ACE nor the CPP rules in place.

We cannot predict whether or how GHG emission regulations will be applied to our plants, including any actions taken by the relevant state authorities. In addition, it is unclear how pending or future litigation relating to GHG matters will impact us. As GHG regulations are implemented, it could result in additional compliance costs impacting our future results of operations and financial position if such costs are not recovered through regulated rates. We will continue working with federal and state regulatory authorities, other utilities, and stakeholders to seek relief from any GHG regulations that, in our view, disproportionately impact customers in our region.
Future additional environmental requirements could cause us to incur material costs of compliance, increase our costs of procuring electricity, decrease transmission revenue and impact cost recovery. Technology to efficiently capture, remove and/or sequester such GHG emissions may not be available within a timeframe consistent with the implementation of any such requirements. Physical impacts of climate change also may present potential risks for severe weather, such as droughts, fires, floods, ice storms and tornadoes, in the locations where we operate or have interests. These potential risks may impact costs for electric and natural gas supply and maintenance of generation, distribution, and transmission facilities.

Clean Air Act Rules and Associated Emission Control Equipment Expenditures - The EPA has proposed or issued a number of rules under different provisions of the Clean Air Act (CAA) that could require the installation of emission control equipment at the generation plants in which we have joint ownership. Air emissions at our thermal generating plants are managed by the use of emissions and combustion controls and monitoring, and sulfur dioxide allowances. These measures are anticipated to be sufficient to permit the facilities to continue to meet current air emissions compliance requirements.

Regional Haze Rules - In January 2017, the EPA published amendments to the requirements under the CAA for state plans for protection of visibility - regional haze rules. Among other things, these amendments revised the process and requirements for the state implementation plans and extended the due date for the next periodic comprehensive regional haze state implementation plan revisions from 2018 to 2021.

The states of Montana, North Dakota and South Dakota are expected to develop and submit to EPA, for its approval, their respective State Implementation Plans (SIP) for Regional Haze compliance. While these states, among others, did not meet the EPA’s July 31, 2021 submission deadline, we still expect each state to submit its SIP in 2022. The draft Montana SIP does not require any additional controls at Colstrip Units 3 and 4. The draft North Dakota SIP does not require any additional controls at the Coyote generating facility, however the EPA, following a preliminary review, has asked North Dakota to reassess its determination regarding Coyote. The draft South Dakota SIP does not require any additional controls at the Big Stone generating facility. Until these SIPs are submitted and approved by EPA, the potential remains that installation of additional emissions controls might be required at these facilities.

Jointly Owned Plants - We have joint ownership in generation plants located in South Dakota, North Dakota, Iowa, and Montana that are or may become subject to the various regulations discussed above that have been or may be issued or proposed.

Other - We continue to manage equipment containing polychlorinated biphenyl (PCB) oil in accordance with the EPA's Toxic Substance Control Act regulations. We will continue to use certain PCB-contaminated equipment for its remaining useful life and will, thereafter, dispose of the equipment according to pertinent regulations that govern the use and disposal of such equipment.

We routinely engage the services of a third-party environmental consulting firm to assist in performing a comprehensive evaluation of our environmental reserve. Based upon information available at this time, we believe that the current environmental reserve properly reflects our remediation exposure for the sites currently and previously owned by us. The portion of our environmental reserve applicable to site remediation may be subject to change as a result of the following uncertainties:

We may not know all sites for which we are alleged or will be found to be responsible for remediation; and
Absent performance of certain testing at sites where we have been identified as responsible for remediation, we cannot estimate with a reasonable degree of certainty the total costs of remediation.

LEGAL PROCEEDINGS

Pacific Northwest Solar Litigation

Pacific Northwest Solar, LLC (PNWS) is a solar QF developer seeking to construct small solar facilities in Montana. We began negotiating with PNWS in early 2016 to purchase the output from 21 of its proposed facilities pursuant to our standard QF-1 Tariff, which is applicable to projects no larger than 3 MWs.
On June 16, 2016, however, the MPSC suspended the availability of the QF-1 Tariff standard rates for that category of solar projects, which included the projects proposed by PNWS. The MPSC exempted from the suspension any projects for which a QF had both submitted a signed power purchase agreement and had executed an interconnection agreement with us by June 16, 2016. Although we had signed four power purchase agreements with PNWS as of that date, we had not entered into interconnection agreements with PNWS for any of those projects. As a result, none of the PNWS projects in Montana qualified for the exemption.

In November 2016, PNWS sued us in state court seeking unspecified damages for breach of contract and a judicial declaration that some or all of the 21 proposed power purchase agreements it had proposed to us were in effect despite the MPSC's Order. We removed the state lawsuit to the United States District Court for the District of Montana (Court).

PNWS also requested the MPSC to exempt its projects from the tariff suspension and allow those projects to receive the QF-1 tariff rate that had been in effect prior to the suspension. We joined in PNWS’s request for relief with respect to four of the projects, but the MPSC did not grant any of the relief requested by PNWS or us.

In August 2017, we entered into a non-monetary, partial settlement with PNWS in which PNWS amended its original complaint to limit its claims for enforcement and/or damages to only four of the 21 power purchase agreements. As a result, the damages sought by the plaintiff was reduced to approximately $8 million for the alleged breach of the four power purchase agreements. We participated in an unsuccessful mediation on January 24, 2019 and subsequent settlement efforts also have been unsuccessful.

On August 31, 2021, the Court ruled that the four agreements are valid and enforceable contracts and that NorthWestern breached the agreements on June 16, 2016 by refusing to go forward with the projects in spite of the MPSC's Orders. On December 15, 2021, after a three-day trial, the jury determined that PNWS had sustained $0.4 million in damages and the judge subsequently entered judgment against us in that amount.

We filed a post-trial motion on January 13, 2022 seeking to have the judgement set aside. On February 9, 2022, the judge denied our post-trial potion. The plaintiff did not seek any post-trial relief and the deadline for doing so has passed. On March 2, 2022, we filed a Notice of Appeal to the U.S. Court of Appeals for the Ninth Circuit. The plaintiff has fifteen days in which to file a cross-appeal.

State of Montana - Riverbed Rents

On April 1, 2016, the State of Montana (State) filed a complaint on remand (the State’s Complaint) with the Montana First Judicial District Court (State District Court), naming us, along with Talen Montana, LLC (Talen) as defendants. The State claimed it owns the riverbeds underlying 10 of our, and formerly Talen’s, hydroelectric facilities (dams, along with reservoirs and tailraces) on the Missouri, Madison and Clark Fork Rivers, and seeks rents for Talen’s and our use and occupancy of such lands. The facilities at issue include the Hebgen, Madison, Hauser, Holter, Black Eagle, Rainbow, Cochrane, Ryan, and Morony facilities on the Missouri and Madison Rivers and the Thompson Falls facility on the Clark Fork River. We acquired these facilities from Talen in November 2014.

The litigation has a long prior history. In 2012, the United States Supreme Court issued a decision holding that the Montana Supreme Court erred in not considering a segment-by-segment approach to determine navigability and relying on present day recreational use of the rivers. It also held that what it referred to as the Great Falls Reach “at least from the head of the first waterfall to the foot of the last” was not navigable for title purposes, and thus the State did not own the riverbeds in that segment. The United States Supreme Court remanded the case to the Montana Supreme Court for further proceedings not inconsistent with its opinion. Following the 2012 remand, the case laid dormant for four years until the State’s Complaint was filed with the State District Court. On April 20, 2016, we removed the case from State District Court to the United States District Court for the District of Montana (Federal District Court). The State filed a motion to remand. Following briefing and argument, on October 10, 2017, the Federal District Court entered an order denying the State’s motion.

Because the State’s Complaint included a claim that the State owned the riverbeds in the Great Falls Reach, on October 16, 2017, we and Talen renewed our earlier-filed motions seeking to dismiss the portion of the State’s Complaint concerning the Great Falls Reach in light of the United States Supreme Court’s decision. On August 1, 2018, the Federal District Court granted the motions to dismiss the State’s Complaint as it pertains to approximately 8.2 miles of riverbed from “the head of
the Black Eagle Falls to the foot of the Great Falls.” In particular, the dismissal pertained to the Black Eagle Dam, Rainbow Dam and reservoir, Cochrane Dam and reservoir, and Ryan Dam and reservoir. While the dismissal of these four facilities may be subject to appeal, that appeal would not likely occur until after judgment in the case. On February 12, 2019, the Federal District Court granted our motion to join the United States as a defendant to the litigation. As a result, on October 31, 2019, the State filed and served an Amended Complaint including the United States as a defendant and removing claims of ownership for the hydroelectric facilities on the Great Falls Reach, except for the Morony and the Black Eagle Developments. We and Talen filed answers to the Amended Complaint on December 13, 2019, and the United States answered on February 5, 2020. A bench trial before the Federal District Court commenced January 4, 2022 and concluded on January 18, 2022. This bench trial addressed the issue of navigability of the segments at issue. The parties must submit amended findings of fact and conclusions of law, along with post-trial briefing, by April 29, 2022. A decision on navigability is expected following such submissions. Damages were bifurcated by agreement and will be tried separately, should the Federal District Court find any segments navigable.

We dispute the State’s claims and intend to vigorously defend the lawsuit. At this time, we cannot predict an outcome. If the Federal District Court determines the riverbeds are navigable under the remaining six facilities that were not dismissed and if it calculates damages as the State District Court did in 2008, we estimate the annual rents could be approximately $3.8 million commencing when we acquired the facilities in November 2014. We anticipate that any obligation to pay the State rent for use and occupancy of the riverbeds would be recoverable in rates from customers, although there can be no assurances that the MPSC would approve any such recovery.

Colstrip Arbitration and Litigation

As part of the settlement of litigation brought by the Sierra Club and the Montana Environmental Information Center against the owners and operator of Colstrip, the owners of Units 1 and 2 agreed to shut down those units no later than July 2022. In January 2020, the owners of Units 1 and 2 closed those two units. We do not have ownership in Units 1 and 2, and decisions regarding those units, including their shut down, were made by their respective owners. The six owners of Units 3 and 4 currently share the operating costs pursuant to the terms of an operating agreement among them, the Ownership and Operation Agreement (O&O Agreement). Costs of common facilities were historically shared among the owners of all four units. With the closure of Units 1 and 2, we have incurred additional operating costs with respect to our interest in Unit 4 and expect to experience a negative impact on our transmission revenue due to reduced amounts of energy transmitted across our transmission lines. We expect to incorporate any reduction in revenue in our next general electric rate filing, resulting in lower revenue credits to certain customers.

The remaining depreciable life of our investment in Colstrip Unit 4 is through 2042. Recovery of costs associated with the closure of the facility is subject to MPSC approval. Three of the joint owners of Units 3 and 4 are subject to regulation in Washington and in May 2019, the Washington state legislature enacted a statute mandating Washington electric utilities to “eliminate coal-fired resources from [their] allocation of electricity” on or before December 31, 2025, after which date they may no longer include their share of coal-fired resources in their regulated electric supply portfolio. As a result of the Washington legislation, four of the six joint owners of Units 3 and 4 requested the operator prepare a 2021 budget reflecting closure of Units 3 and 4 by 2025, and alternately a closure of Unit 3 by 2025 and a closure of Unit 4 by 2027. Differing viewpoints on closure dates delayed approval of the 2021 budget, until it was approved on March 22, 2021. Budgeting for 2022 was also delayed, with the same four joint owners demanding substantial budget reductions, but was ultimately approved on January 21, 2022. Such budgeting pressures may result in future budgets that may not be sufficient to maintain the reliability of Units 3 and 4.

While we believe closure requires each owner’s consent, there are differences among the owners as to this issue under the O&O Agreement. On March 12, 2021, we initiated an arbitration under the O&O Agreement (the “Arbitration”), which seeks to resolve the primary issue of whether closure of Units 3 and 4 can be accomplished without each joint owner's consent and to clarify the obligations of the joint owners to continue to fund operations until all joint owners agree on closure.

The Arbitration has given rise to three lawsuits concerning the number of arbitrators, the venue and the applicable arbitration laws. The four joint owners from the Pacific Northwest assert the Arbitration must be conducted under the O&O Agreement, with one arbitrator, in Spokane County, Washington, and pursuant to the Washington Arbitration Act. The fifth joint owner asserts the Arbitration must be conducted per the terms of Montana Senate Bill 265 (SB 265), which requires the Arbitration be conducted, with three arbitrators, in Montana and pursuant to the Montana Uniform Arbitration Act. The three initiated lawsuits do not make direct financial demands, and instead, are intended to address issues related to process for the Arbitration.
Since the Arbitration was initiated, and despite the litigation, we have worked and continue to work with the other joint owners to arrive at an agreed upon process for the Arbitration.

Colstrip Coal Dust Litigation

On December 14, 2020, a claim was filed against Talen Montana, LLC, the operator of the Colstrip Steam Plant, in the Montana Sixteenth Judicial District Court, Rosebud County, Cause No. CV-20-58. The plaintiffs allege they have suffered adverse effects from coal dust generated during operations associated with the Colstrip Steam Plant. On August 26, 2021, the claim was amended to add in excess of 100 plaintiffs. It also added NorthWestern, as well as the other owners of the Colstrip Steam Plant, and Westmoreland Rosebud Mining LLC, as defendants. Plaintiffs are seeking economic damages, costs and disbursements, punitive damages, attorneys’ fees, and an injunction prohibiting defendants from allowing coal dust to blow onto plaintiffs’ properties.

Since this lawsuit is in its early stages, we are unable to predict outcomes or estimate a range of reasonably possible losses.

Other Legal Proceedings

We are also subject to various other legal proceedings, governmental audits and claims that arise in the ordinary course of business. In the opinion of management, the amount of ultimate liability with respect to these other actions will not materially affect our financial position, results of operations, or cash flows.


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
STATEMENTS OF ACCUMULATED COMPREHENSIVE INCOME, COMPREHENSIVE INCOME, AND HEDGING ACTIVITIES
  1. Report in columns (b),(c),(d) and (e) the amounts of accumulated other comprehensive income items, on a net-of-tax basis, where appropriate.
  2. Report in columns (f) and (g) the amounts of other categories of other cash flow hedges.
  3. For each category of hedges that have been accounted for as "fair value hedges", report the accounts affected and the related amounts in a footnote.
  4. Report data on a year-to-date basis.
Line No.
Item
(a)
Unrealized Gains and Losses on Available-For-Sale Securities
(b)
Minimum Pension Liability Adjustment (net amount)
(c)
Foreign Currency Hedges
(d)
Other Adjustments
(e)
Other Cash Flow Hedges Interest Rate Swaps
(f)
Other Cash Flow Hedges [Specify]
(g)
Totals for each category of items recorded in Account 219
(h)
Net Income (Carried Forward from Page 116, Line 78)
(i)
Total Comprehensive Income
(j)
1
Balance of Account 219 at Beginning of Preceding Year
115,624
1,411,575
9,032,298
7,505,099
2
Preceding Quarter/Year to Date Reclassifications from Account 219 to Net Income
(a)
1,839,132
(e)
452,130
2,291,262
3
Preceding Quarter/Year to Date Changes in Fair Value
(c)
87,692
87,692
4
Total (lines 2 and 3)
1,839,132
87,692
452,130
2,378,954
155,215,334
157,594,288
5
Balance of Account 219 at End of Preceding Quarter/Year
1,954,756
1,499,267
8,580,168
5,126,145
6
Balance of Account 219 at Beginning of Current Year
1,954,756
1,499,267
8,580,168
5,126,145
7
Current Quarter/Year to Date Reclassifications from Account 219 to Net Income
(b)
436,295
(f)
452,130
15,835
8
Current Quarter/Year to Date Changes in Fair Value
(d)
57,286
57,286
9
Total (lines 7 and 8)
436,295
57,286
452,130
41,451
186,839,752
186,798,301
10
Balance of Account 219 at End of Current Quarter/Year
1,518,461
1,441,981
8,128,038
5,167,596


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: AccumulatedOtherComprehensiveIncomeLossMinimumPensionLiabilityAdjustmentReclassificationsToNetIncomeLoss
Postretirement medical liability adjustment.
(b) Concept: AccumulatedOtherComprehensiveIncomeLossMinimumPensionLiabilityAdjustmentReclassificationsToNetIncomeLoss
Postretirement medical liability adjustment.
(c) Concept: AccumulatedOtherComprehensiveIncomeLossOtherAdjustmentsToComprehensiveIncomeLossChangesInFairValue
Foreign currency translation adjustment.
(d) Concept: AccumulatedOtherComprehensiveIncomeLossOtherAdjustmentsToComprehensiveIncomeLossChangesInFairValue
Foreign currency translation adjustment.
(e) Concept: AccumulatedOtherComprehensiveIncomeLossOtherCashFlowHedgesInterestRateSwapsReclassificationsToNetIncomeLoss
Reclassification of net losses on derivative instruments.
(f) Concept: AccumulatedOtherComprehensiveIncomeLossOtherCashFlowHedgesInterestRateSwapsReclassificationsToNetIncomeLoss
Reclassification of net losses on derivative instruments.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SUMMARY OF UTILITY PLANT AND ACCUMULATED PROVISIONS FOR DEPRECIATION. AMORTIZATION AND DEPLETION

Report in Column (c) the amount for electric function, in column (d) the amount for gas function, in column (e), (f), and (g) report other (specify) and in column (h) common function.

Line No.
Classification
(a)
Total Company For the Current Year/Quarter Ended
(b)
Electric
(c)
Gas
(d)
Other (Specify)
(e)
Other (Specify)
(f)
Other (Specify)
(g)
Common
(h)
1
UtilityPlantAbstract
UTILITY PLANT
2
UtilityPlantInServiceAbstract
In Service
3
UtilityPlantInServiceClassified
Plant in Service (Classified)
6,345,891,509
4,919,655,275
1,192,035,752
(d)
1,523,174
232,677,308
4
UtilityPlantInServicePropertyUnderCapitalLeases
Property Under Capital Leases
42,280,372
(e)
40,209,537
(f)
2,070,835
5
UtilityPlantInServicePlantPurchasedOrSold
Plant Purchased or Sold
6
UtilityPlantInServiceCompletedConstructionNotClassified
Completed Construction not Classified
7
UtilityPlantInServiceExperimentalPlantUnclassified
Experimental Plant Unclassified
4,092,785
4,092,785
8
UtilityPlantInServiceClassifiedAndUnclassified
Total (3 thru 7)
6,392,264,666
4,923,748,060
1,192,035,752
1,523,174
40,209,537
2,070,835
232,677,308
9
UtilityPlantLeasedToOthers
Leased to Others
10
UtilityPlantHeldForFutureUse
Held for Future Use
5,492,985
5,463,119
29,866
11
ConstructionWorkInProgress
Construction Work in Progress
284,729,122
211,432,612
40,995,392
32,301,118
12
UtilityPlantAcquisitionAdjustment
Acquisition Adjustments
686,328,435
(a)
686,328,435
13
UtilityPlantAndConstructionWorkInProgress
Total Utility Plant (8 thru 12)
7,368,815,208
5,826,972,226
1,233,061,010
1,523,174
40,209,537
2,070,835
264,978,426
14
AccumulatedProvisionForDepreciationAmortizationAndDepletionOfPlantUtility
Accumulated Provisions for Depreciation, Amortization, & Depletion
2,648,396,212
2,036,712,091
511,447,661
1,047,215
31,162,371
68,026,874
15
UtilityPlantNet
Net Utility Plant (13 less 14)
4,720,418,996
3,790,260,135
721,613,349
475,959
9,047,166
2,070,835
196,951,552
16
DetailOfAccumulatedProvisionsForDepreciationAmortizationAndDepletionAbstract
DETAIL OF ACCUMULATED PROVISIONS FOR DEPRECIATION, AMORTIZATION AND DEPLETION
17
AccumulatedProvisionForDepreciationAmortizationAndDepletionUtilityPlantInServiceAbstract
In Service:
18
DepreciationUtilityPlantInService
Depreciation
2,397,110,328
1,857,591,459
460,029,065
1,047,215
31,162,371
47,280,218
19
AmortizationAndDepletionOfProducingNaturalGasLandAndLandRightsutilityPlantInService
Amortization and Depletion of Producing Natural Gas Land and Land Rights
44,842,108
44,842,108
20
AmortizationOfUndergroundStorageLandAndLandRightsutilityPlantInService
Amortization of Underground Storage Land and Land Rights
21
AmortizationOfOtherUtilityPlantUtilityPlantInService
Amortization of Other Utility Plant
49,476,790
(b)
22,153,646
6,576,488
20,746,656
22
DepreciationAmortizationAndDepletionUtilityPlantInService
Total in Service (18 thru 21)
2,491,429,226
1,879,745,105
511,447,661
1,047,215
31,162,371
68,026,874
23
DepreciationAmortizationAndDepletionUtilityPlantLeasedToOthersAbstract
Leased to Others
24
DepreciationUtilityPlantLeasedToOthers
Depreciation
25
AmortizationAndDepletionUtilityPlantLeasedToOthers
Amortization and Depletion
26
DepreciationAmortizationAndDepletionUtilityPlantLeasedToOthers
Total Leased to Others (24 & 25)
27
DepreciationAndAmortizationUtilityPlantHeldForFutureUseAbstract
Held for Future Use
28
DepreciationUtilityPlantHeldForFutureUse
Depreciation
29
AmortizationUtilityPlantHeldForFutureUse
Amortization
30
DepreciationAndAmortizationUtilityPlantHeldForFutureUse
Total Held for Future Use (28 & 29)
31
AbandonmentOfLeases
Abandonment of Leases (Natural Gas)
32
AmortizationOfPlantAcquisitionAdjustment
Amortization of Plant Acquisition Adjustment
156,966,986
(c)
156,966,986
33
AccumulatedProvisionForDepreciationAmortizationAndDepletionOfPlantUtility
Total Accum Prov (equals 14) (22,26,30,31,32)
2,648,396,212
2,036,712,091
511,447,661
1,047,215
31,162,371
68,026,874


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: UtilityPlantAcquisitionAdjustment
Acquisition Adjustments of $686,328,435 consists of $656,318,593 for Montana Operations and $30,009,842 for South Dakota Operations.
(b) Concept: AmortizationOfOtherUtilityPlantUtilityPlantInService
Amortization of Other South Dakota Electric Plant was $0 and $(61,194) for 2021 and 2020, respectively.
Amortization of Other Montana Electric Plant was $22,153,646 and $21,935,205 for 2021 and 2020, respectively
(c) Concept: AmortizationOfPlantAcquisitionAdjustment
Amortization of Plant Acquisition Adjustments of $156,966,986 consist of $149,464,525 for Montana Operations and $7,502,461 for South Dakota Operations.
(d) Concept: UtilityPlantInServiceClassified
This column represents regulated propane
(e) Concept: UtilityPlantInServicePropertyUnderCapitalLeases
This column represents an electric default supply capacity and energy sales agreement classified as a capital lease.
(f) Concept: UtilityPlantInServicePropertyUnderCapitalLeases
This column represents our right of use (operating lease) assets.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
NUCLEAR FUEL MATERIALS (Account 120.1 through 120.6 and 157)
  1. Report below the costs incurred for nuclear fuel materials in process of fabrication, on hand, in reactor, and in cooling; owned by the respondent.
  2. If the nuclear fuel stock is obtained under leasing arrangements, attach a statement showing the amount of nuclear fuel leased, the quantity used and quantity on hand, and the costs incurred under such leasing arrangements.
Line No.
Description of item
(a)
Balance Beginning of Year
(b)
Changes during Year Additions
(c)
Changes during Year Amortization
(d)
Changes during Year Other Reductions (Explain in a footnote)
(e)
Balance End of Year
(f)
1
Nuclear Fuel in process of Refinement, Conv, Enrichment & Fab (120.1)
2
Fabrication
3
Nuclear Materials
4
Allowance for Funds Used during Construction
5
(Other Overhead Construction Costs, provide details in footnote)
6
SUBTOTAL (Total 2 thru 5)
7
Nuclear Fuel Materials and Assemblies
8
In Stock (120.2)
9
In Reactor (120.3)
10
SUBTOTAL (Total 8 & 9)
11
Spent Nuclear Fuel (120.4)
12
Nuclear Fuel Under Capital Leases (120.6)
13
(Less) Accum Prov for Amortization of Nuclear Fuel Assem (120.5)
14
TOTAL Nuclear Fuel Stock (Total 6, 10, 11, 12, less 13)
15
Estimated Net Salvage Value of Nuclear Materials in Line 9
16
Estimated Net Salvage Value of Nuclear Materials in Line 11
17
Est Net Salvage Value of Nuclear Materials in Chemical Processing
18
Nuclear Materials held for Sale (157)
19
Uranium
20
Plutonium
21
Other (Provide details in footnote)
22
TOTAL Nuclear Materials held for Sale (Total 19, 20, and 21)


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ELECTRIC PLANT IN SERVICE (Account 101, 102, 103 and 106)
  1. Report below the original cost of electric plant in service according to the prescribed accounts.
  2. In addition to Account 101, Electric Plant in Service (Classified), this page and the next include Account 102, Electric Plant Purchased or Sold; Account 103, Experimental Electric Plant Unclassified; and Account 106, Completed Construction Not Classified-Electric.
  3. Include in column (c) or (d), as appropriate, corrections of additions and retirements for the current or preceding year.
  4. For revisions to the amount of initial asset retirement costs capitalized, included by primary plant account, increases in column (c) additions and reductions in column (e) adjustments.
  5. Enclose in parentheses credit adjustments of plant accounts to indicate the negative effect of such accounts.
  6. Classify Account 106 according to prescribed accounts, on an estimated basis if necessary, and include the entries in column (c). Also to be included in column (c) are entries for reversals of tentative distributions of the prior year reported in column (b). Likewise, if the respondent has a significant amount of plant retirements which have not been classified to primary accounts at the end of the year, include in column (d) a tentative distribution of such retirements, on an estimated basis, with appropriate contra entry to the account for accumulated depreciation provision. Include also in column (d) distributions of these tentative classifications in columns (c) and (d), including the reversals of the prior years tentative account distributions of these amounts. Careful observance of the above instructions and the texts of Accounts 101 and 106 will avoid serious omissions of the reported amount of respondent’s plant actually in service at end of year.
  7. Show in column (f) reclassifications or transfers within utility plant accounts. Include also in column (f) the additions or reductions of primary account classifications arising from distribution of amounts initially recorded in Account 102, include in column (e) the amounts with respect to accumulated provision for depreciation, acquisition adjustments, etc., and show in column (f) only the offset to the debits or credits distributed in column (f) to primary account classifications.
  8. For Account 399, state the nature and use of plant included in this account and if substantial in amount submit a supplementary statement showing subaccount classification of such plant conforming to the requirement of these pages.
  9. For each amount comprising the reported balance and changes in Account 102, state the property purchased or sold, name of vendor or purchase, and date of transaction. If proposed journal entries have been filed with the Commission as required by the Uniform System of Accounts, give also date.
Line No.
Account
(a)
Balance Beginning of Year
(b)
Additions
(c)
Retirements
(d)
Adjustments
(e)
Transfers
(f)
Balance at End of Year
(g)
1
1. INTANGIBLE PLANT
2
(301) Organization
(a)
19,995
19,995
3
(302) Franchise and Consents
(b)
18,713,879
574,679
19,288,558
4
(303) Miscellaneous Intangible Plant
2,282,033
5,740,924
703,158
44,833
7,274,966
5
TOTAL Intangible Plant (Enter Total of lines 2, 3, and 4)
21,015,907
6,315,603
703,158
44,833
26,583,519
6
2. PRODUCTION PLANT
7
A. Steam Production Plant
8
(310) Land and Land Rights
812,637
812,637
9
(311) Structures and Improvements
55,738,699
253,527
302,171
55,183,001
10
(312) Boiler Plant Equipment
228,753,979
8,226,681
939,895
236,040,765
11
(313) Engines and Engine-Driven Generators
12
(314) Turbogenerator Units
41,776,202
5,819,556
44,879
47,550,879
13
(315) Accessory Electric Equipment
14,783,415
588,694
52,688
15,319,421
14
(316) Misc. Power Plant Equipment
25,812,853
147,733
32,283
25,928,303
15
(317) Asset Retirement Costs for Steam Production
22,442,834
20,836
22,463,670
16
TOTAL Steam Production Plant (Enter Total of lines 8 thru 15)
390,120,619
14,549,973
1,371,916
403,298,676
17
B. Nuclear Production Plant
18
(320) Land and Land Rights
19
(321) Structures and Improvements
20
(322) Reactor Plant Equipment
21
(323) Turbogenerator Units
22
(324) Accessory Electric Equipment
23
(325) Misc. Power Plant Equipment
24
(326) Asset Retirement Costs for Nuclear Production
25
TOTAL Nuclear Production Plant (Enter Total of lines 18 thru 24)
26
C. Hydraulic Production Plant
27
(330) Land and Land Rights
28
(331) Structures and Improvements
5,884,456
16,442
5,900,898
29
(332) Reservoirs, Dams, and Waterways
124,894,234
582,005
52,531
125,423,708
30
(333) Water Wheels, Turbines, and Generators
177,509,945
546,614
148,998
177,907,561
31
(334) Accessory Electric Equipment
140,295,773
13,405,876
2,321,951
151,379,698
32
(335) Misc. Power Plant Equipment
86,002,570
4,612,895
1,865,404
88,750,061
33
(336) Roads, Railroads, and Bridges
20,357,320
63,097
1,200
20,419,217
34
(337) Asset Retirement Costs for Hydraulic Production
2,493,836
2,493,836
35
TOTAL Hydraulic Production Plant (Enter Total of lines 27 thru 34)
557,438,134
19,226,929
4,390,084
572,274,979
36
D. Other Production Plant
37
(340) Land and Land Rights
2,088,260
1,813,168
440
3,901,868
38
(341) Structures and Improvements
86,223,412
4,280
86,227,692
39
(342) Fuel Holders, Products, and Accessories
26,498,697
27,506
532
26,525,671
40
(343) Prime Movers
145,336,001
1,860,132
147,196,133
41
(344) Generators
143,520,064
143,520,064
42
(345) Accessory Electric Equipment
26,869,190
254,392
6,831
27,116,751
43
(346) Misc. Power Plant Equipment
46,217,088
4,467,108
50,684,196
44
(347) Asset Retirement Costs for Other Production
5,038,356
5,038,356
44.1
(348) Energy Storage Equipment - Production
45
TOTAL Other Prod. Plant (Enter Total of lines 37 thru 44)
481,791,068
8,426,586
7,363
440
490,210,731
46
TOTAL Prod. Plant (Enter Total of lines 16, 25, 35, and 45)
1,429,349,821
42,203,488
5,769,363
440
1,465,784,386
47
3. Transmission Plant
48
(350) Land and Land Rights
41,089,611
737,995
131,802
41,959,408
48.1
(351) Energy Storage Equipment - Transmission
49
(352) Structures and Improvements
45,692,217
4,008,983
21,935
1,202,422
50,881,687
50
(353) Station Equipment
376,675,553
35,271,152
2,528,950
1,792,353
411,210,108
51
(354) Towers and Fixtures
28,717,133
946,345
76,454
730,752
30,317,776
52
(355) Poles and Fixtures
444,956,999
42,881,198
2,838,332
465,195
484,534,670
53
(356) Overhead Conductors and Devices
201,548,686
6,140,779
775,771
206,913,694
54
(357) Underground Conduit
774,968
3,712
778,680
55
(358) Underground Conductors and Devices
7,140,760
509,295
6,631,465
56
(359) Roads and Trails
2,519,641
6
2,519,647
57
(359.1) Asset Retirement Costs for Transmission Plant
58
TOTAL Transmission Plant (Enter Total of lines 48 thru 57)
1,149,115,568
89,480,875
6,241,442
3,392,134
1,235,747,135
59
4. Distribution Plant
60
(360) Land and Land Rights
15,239,783
1,957
507
125,590
15,111,729
61
(361) Structures and Improvements
38,177,137
585,474
12,817
1,149,432
37,600,362
62
(362) Station Equipment
297,372,948
6,872,584
3,572,678
2,572,594
298,100,260
63
(363) Energy Storage Equipment – Distribution
64
(364) Poles, Towers, and Fixtures
374,265,804
24,307,825
2,164,656
465,194
396,874,167
65
(365) Overhead Conductors and Devices
156,113,102
6,713,379
2,373,273
3,500
160,449,708
66
(366) Underground Conduit
153,197,203
13,107,727
9,076
166,295,854
67
(367) Underground Conductors and Devices
293,588,312
16,736,102
1,030,220
309,294,194
68
(368) Line Transformers
276,686,048
12,732,656
709,670
288,709,034
69
(369) Services
172,105,795
11,737,063
300,063
183,542,795
70
(370) Meters
69,689,711
13,309,630
4,274,237
78,725,104
71
(371) Installations on Customer Premises
112,821
19,911
38,242
94,490
72
(372) Leased Property on Customer Premises
73
(373) Street Lighting and Signal Systems
77,254,125
9,401,393
709,307
85,946,211
74
(374) Asset Retirement Costs for Distribution Plant
75
TOTAL Distribution Plant (Enter Total of lines 60 thru 74)
1,923,802,789
115,521,787
15,194,746
3,385,922
2,020,743,908
76
5. REGIONAL TRANSMISSION AND MARKET OPERATION PLANT
77
(380) Land and Land Rights
78
(381) Structures and Improvements
79
(382) Computer Hardware
80
(383) Computer Software
81
(384) Communication Equipment
82
(385) Miscellaneous Regional Transmission and Market Operation Plant
83
(386) Asset Retirement Costs for Regional Transmission and Market Oper
84
TOTAL Transmission and Market Operation Plant (Total lines 77 thru 83)
85
6. General Plant
86
(389) Land and Land Rights
796,461
796,461
87
(390) Structures and Improvements
12,645,074
113,990
169,598
12,589,466
88
(391) Office Furniture and Equipment
1,614,763
189,903
206,716
1,597,950
89
(392) Transportation Equipment
76,078,414
5,659,811
2,212,028
79,526,197
90
(393) Stores Equipment
984,380
9,185
37,800
955,765
91
(394) Tools, Shop and Garage Equipment
11,976,905
729,845
339,668
12,367,082
92
(395) Laboratory Equipment
1,215,039
168,995
1,046,044
93
(396) Power Operated Equipment
6,721,148
158,826
105,937
6,774,037
94
(397) Communication Equipment
46,703,608
7,284,046
954,951
53,032,703
95
(398) Miscellaneous Equipment
2,111,267
645
2,110,622
96
SUBTOTAL (Enter Total of lines 86 thru 95)
160,847,059
14,145,606
4,196,338
170,796,327
97
(399) Other Tangible Property
98
(399.1) Asset Retirement Costs for General Plant
99
TOTAL General Plant (Enter Total of lines 96, 97, and 98)
160,847,059
14,145,606
4,196,338
170,796,327
100
TOTAL (Accounts 101 and 106)
4,684,131,144
267,667,359
32,105,047
38,181
4,919,655,275
101
(102) Electric Plant Purchased (See Instr. 8)
102
(Less) (102) Electric Plant Sold (See Instr. 8)
103
(103) Experimental Plant Unclassified
2,928,663
1,164,122
4,092,785
104
TOTAL Electric Plant in Service (Enter Total of lines 100 thru 103)
4,687,059,807
268,831,481
32,105,047
38,181
4,923,748,060


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: Organization
Montana operations

Line Account Beginning of
Year
Additions Retirements Adjustments Transfers End of Year
No. (a) (b) (c) (d) (e) (f) (g)
1 1. INTANGIBLE PLANT
2 (301) Organization 19,995  —  —  —  —  19,995 
3 (302) Franchises and Consents 18,713,879  574,679  —  —  —  19,288,558 
4 (303) Miscellaneous Intangible Plant 2,237,200  5,732,620  703,158  —  —  7,266,662 
5 TOTAL Intangible Plant (Enter Total of lines 2, 3, and4) 20,971,074  6,307,299  703,158  —  —  26,575,215 
6 2. PRODUCTION PLANT
7 A. Steam Production Plant
8 (310) Land and Land Rights 446,126  —  —  —  —  446,126 
9 (311) Structures and Improvements 28,121,086  95,315  200,212  —  —  28,016,189 
10 (312) Boiler Plant Equipment 30,807,063  6,776,486  487,414  —  —  37,096,135 
11 (313) Engines and Engine-Driven Generators —  —  —  —  —  — 
12 (314) Turbogenerator Units 15,514,316  5,744,889  —  —  —  21,259,205 
13 (315) Accessory Electric Equipment 1,737,254  481,871  46,007  —  —  2,173,118 
14 (316) Misc. Power Plant Equipment 22,906,466  45,917  —  —  —  22,952,383 
15 (317) Asset Retirement Costs for Steam 19,779,123  20,836  —  —  —  19,799,959 
16 TOTAL Steam Production Plant (Enter Total of lines 8 thru 14) 119,311,434  13,165,314  733,633  —  —  131,743,115 
17 B. Nuclear Production Plant
18 (320) Land and Land Rights —  —  —  —  —  — 
19 (321) Structures and Improvements —  —  —  —  —  — 
20 (322) Reactor Plant Equipment —  —  —  —  —  — 
21 (323) Turbogenerator Units —  —  —  —  —  — 
22 (324) Accessory Electric Equipment —  —  —  —  —  — 
23 (325) Misc. Power Plant Equipment —  —  —  —  —  — 
24 TOTAL Nuclear Production Plant (Enter Total of lines 17 thru 22) —  —  —  —  —  — 
25 C. Hydraulic Production Plant
26 (330) Land and Land Rights 5,884,456  16,442  —  —  —  5,900,898 
27 (331) Structures and Improvements 124,894,234  582,005  52,531  —  —  125,423,708 
28 (332) Reservoirs, Dams, and Waterways 177,509,945  546,614  148,998  —  —  177,907,561 
29 (333) Water Wheels, Turbines, and Generators 140,295,773  13,405,876  2,321,951  —  —  151,379,698 
30 (334) Accessory Electric Equipment 86,002,570  4,612,895  1,865,404  —  —  88,750,061 
31 (335) Misc. Power Plant Equipment 20,357,320  63,097  1,200  —  —  20,419,217 
32 (336) Roads, Railroads, and Bridges 2,493,836  —  —  —  —  2,493,836 
33
TOTAL Hydraulic Production Plant (Enter Total of lines 25 thru 31)
557,438,134  19,226,929  4,390,084  —  —  572,274,979 
34 D. Other Production Plant
35 (340) Land and Land Rights 2,005,777  1,813,168  —  —  440  3,819,385 
36 (341) Structures and Improvements 59,449,471  —  —  —  —  59,449,471 
37 (342) Fuel Holders, Products, and
Accessories
21,230,045  —  —  —  —  21,230,045 
38 (343) Prime Movers 102,331,432  1,858,195  —  —  —  104,189,627 
39 (344) Generators 55,657,436  —  —  —  —  55,657,436 
40 (345) Accessory Electric Equipment 18,956,267  254,392  6,831  —  —  19,203,828 
41 (346) Misc. Power Plant Equipment 26,569,665  1,564,654  —  —  —  28,134,319 
42
(347) Asset Retirement Costs for Other
Production
3,686,815  —  —  —  3,686,815 
43
TOTAL Other Production Plant (Enter Total of lines 34 thru 40)
289,886,908  5,490,409  6,831  —  440  295,370,926 
44
TOTAL Production Plant (Enter Total of lines 15, 23, 32, and 41)
966,636,476  37,882,652  5,130,548  —  440  999,389,020 
45 3. TRANSMISSION PLANT
46 (350) Land and Land Rights 39,367,412  737,996  —  —  131,802  40,237,210 
47 (352) Structures and Improvements 34,444,659  3,063,752  21,935  —  1,202,422  38,688,898 
48 (353) Station Equipment 282,383,309  28,010,917  1,512,083  —  1,792,353  310,674,496 
49 (354) Towers and Fixtures 28,717,133  946,345  76,454  —  730,752  30,317,776 
50 (355) Poles and Fixtures 391,293,220  39,037,108  2,331,812  —  (465,195) 427,533,321 
51 (356) Overhead Conductors and Devices 170,006,561  4,926,326  316,981  —  —  174,615,906 
52 (357) Underground Conduit 137,878  —  —  —  —  137,878 
53 (358) Underground Conductors and Devices 2,756,211  (820,862) —  —  —  1,935,349 
54 (359) Roads and Trails 2,519,641  —  —  —  2,519,647 
55
TOTAL Transmission Plant (Enter Total of lines 44 thru 52)
951,626,024  75,901,588  4,259,265  —  3,392,134  1,026,660,481 
56 4. DISTRIBUTION PLANT
57 (360) Land and Land Rights 14,391,697  (1,956) —  —  (125,590) 14,264,151 
58 (361) Structures and Improvements 36,821,223  585,454  12,817  —  (1,149,432) 36,244,428 
59 (362) Station Equipment 258,869,101  (253,254) 2,643,503  —  (2,576,094) 253,396,250 
60 (363) Storage Battery Equipment —  —  —  —  —  — 
61 (364) Poles, Towers, and Fixtures 321,071,362  21,326,676  1,162,142  —  465,194  341,701,090 
62 (365) Overhead Conductors and Devices 134,620,448  5,012,200  125,146  —  —  139,507,502 
63 (366) Underground Conduit 143,133,474  12,834,003  757  —  —  155,966,720 
64 (367) Underground Conductors and Devices 236,712,043  13,531,573  411,113  —  —  249,832,503 
65 (368) Line Transformers 236,075,809  11,185,953  709,670  —  —  246,552,092 
66 (369) Services 151,528,832  10,849,799  114,393  —  —  162,264,238 
67 (370) Meters 56,172,450  12,749,219  3,810,991  —  —  65,110,678 
68 (371) Installations on Customer Premises —  —  —  —  —  — 
69 (372) Leased Property on Customer Premises —  —  —  —  —  — 
70 (373&388) Street Lighting and Signal Systems 68,248,931  9,147,594  698,495  —  —  76,698,030 
71
(374) Asset Retirement Costs for Distribution Plant
—  —  —  —  —  — 
72
TOTAL Distribution Plant (Enter Total of lines 55 thru 68)
1,657,645,370  96,967,261  9,689,027  —  (3,385,922) 1,741,537,682 
73 5. GENERAL PLANT
74 (389) Land and Land Rights 689,633  —  —  —  —  689,633 
75 (390) Structures and Improvements 10,697,093  113,990  7,000  —  —  10,804,083 
76 (391) Office Furniture and Equipment 1,607,693  189,903  206,716  —  —  1,590,880 
77 (392) Transportation Equipment 59,971,775  4,377,160  1,466,951  —  —  62,881,984 
78 (393) Stores Equipment 984,380  9,185  37,800  —  —  955,765 
79 (394) Tools, Shop and Garage Equipment 9,875,770  640,826  287,070  —  —  10,229,526 
80 (395) Laboratory Equipment 1,215,039  —  168,995  —  —  1,046,044 
81 (396) Power Operated Equipment 5,899,876  103,872  105,937  —  —  5,897,811 
82 (397) Communication Equipment 43,653,456  7,143,563  937,881  —  —  49,859,138 
83 (398) Miscellaneous Equipment 2,111,267  —  645  —  —  2,110,622 
84 SUBTOTAL (Enter Total of lines 71 thru 80) 136,705,982  12,578,499  3,218,995  —  —  146,065,486 
85 (399) Other Tangible Property —  —  —  —  —  — 
86
TOTAL General Plant (Enter Total of lines 81 and 82)
136,705,982  12,578,499  3,218,995  —  —  146,065,486 
87 TOTAL (Accounts 101 and 106) 3,733,584,926  229,637,299  23,000,993  —  6,652  3,940,227,884 
88 (102) Electric Plant Purchased (See Instr. 8) —  —  — 
89 (Less) (102) Electric Plant Sold (See Instr. 8) —  —  — 
90 (103) Experimental Plant Unclassified 2,928,663  1,164,122  4,092,785 
91 TOTAL Electric Plant in Service(Enter Total of lines 84 thru 87) 3,736,513,589  230,801,421  23,000,993  —  6,652  3,944,320,669 
(b) Concept: FranchisesAndConsents
South Dakota Operations

Line Account Beginning of
Year
Additions Retirement
Adjustments Transfers End of Year Plant Line
No. (a) (b) (c) (d) (e) (f) (g) Acct No.
1 1. INTANGIBLE PLANT 1
2 (301) Organization —  —  —  (301) 2
3 (302) Franchises and Consents —  —  —  (302) 3
4 (303) Miscellaneous Intangible Plant 44,833  8,304  —  —  (44,833) 8,304  (303) 4
5 TOTAL Intangible Plant (Enter Total of lines 2, 3, and4) 44,833  8,304  —  —  (44,833) 8,304  5
6 2. PRODUCTION PLANT 6
7 A. Steam Production Plant 7
8 (310) Land and Land Rights 366,511  —  —  —  —  366,511  (310) 8
9 (311) Structures and Improvements 27,617,613  (348,843) 101,959  —  —  27,166,811  (311) 9
10 (312) Boiler Plant Equipment 197,946,916  1,450,195  452,481  —  —  198,944,630  (312) 10
11 (313) Engines and Engine-Driven Generators —  —  —  —  —  —  (313) 11
12 (314) Turbogenerator Units 26,261,886  74,667  44,879  —  —  26,291,674  (314) 12
13 (315) Accessory Electric Equipment 13,046,161  106,823  6,681  —  —  13,146,303  (315) 13
14 (316) Misc. Power Plant Equipment 2,906,387  101,816  32,283  —  —  2,975,920  (316) 14
15 (317) Asset Retirement Costs for Steam 2,663,711  —  —  —  —  2,663,711 
16 TOTAL Steam Production Plant (Enter Total of lines 8 thru 14) 270,809,185  1,384,658  638,283  —  —  271,555,560  15
17 B. Nuclear Production Plant 16
18 (320) Land and Land Rights —  —  —  —  —  —  (320) 17
19 (321) Structures and Improvements —  —  —  —  —  —  (321) 18
20 (322) Reactor Plant Equipment —  —  —  —  —  —  (322) 19
21 (323) Turbogenerator Units —  —  —  —  —  —  (323) 20
22 (324) Accessory Electric Equipment —  —  —  —  —  —  (324) 21
23 (325) Misc. Power Plant Equipment —  —  —  —  —  —  (325) 22
24 TOTAL Nuclear Production Plant (Enter Total of lines 17 thru 22) —  —  —  —  —  —  23
25 C. Hydraulic Production Plant 24
26 (330) Land and Land Rights —  —  —  —  (330) 25
27 (331) Structures and Improvements —  —  —  —  —  (331) 26
28 (332) Reservoirs, Dams, and Waterways —  —  —  —  (332) 27
29 (333) Water Wheels, Turbines, and Generators —  —  —  —  (333) 28
30 (334) Accessory Electric Equipment —  —  —  —  (334) 29
31 (335) Misc. Power Plant Equipment —  —  —  —  (335) 30
32 (336) Roads, Railroads, and Bridges —  —  —  —  (336) 31
33
TOTAL Hydraulic Production Plant (Enter Total of lines 25 thru 31)
—  —  —  —  —  —  32
34 D. Other Production Plant 33
35 (340) Land and Land Rights 82,483  —  —  —  —  82,483  (340) 34
36 (341) Structures and Improvements 26,773,941  4,280  —  —  —  26,778,221  (341) 35
37 (342) Fuel Holders, Products, and
Accessories
5,268,652  27,506  532  —  —  5,295,626  (342) 36
38 (343) Prime Movers 43,004,569  1,937  —  —  —  43,006,506  (343) 37
39 (344) Generators 87,862,628  —  —  —  —  87,862,628  (344) 38
40 (345) Accessory Electric Equipment 7,912,923  —  —  —  —  7,912,923  (345) 39
41 (346) Misc. Power Plant Equipment 19,647,423  2,902,454  —  —  —  22,549,877  (346) 40
42
(347) Asset Retirement Costs for Other Production
1,351,541  —  —  —  —  1,351,541 
43
TOTAL Other Production Plant (Enter Total of lines 34 thru 40)
191,904,160  2,936,177  532  —  —  194,839,805  41
44
TOTAL Production Plant (Enter Total of lines 15, 23, 32, and 41)
462,713,345  4,320,835  638,815  —  —  466,395,365  42
45 3. TRANSMISSION PLANT 43
46 (350) Land and Land Rights 1,722,199  —  —  —  —  1,722,199  (350) 44
47 (352) Structures and Improvements 11,247,558  945,230  —  —  —  12,192,788  (352) 45
48 (353) Station Equipment 94,292,244  7,260,235  1,016,867  —  —  100,535,612  (353) 46
49 (354) Towers and Fixtures —  —  —  —  —  —  (354) 47
50 (355) Poles and Fixtures 53,663,779  3,844,090  506,520  —  —  57,001,349  (355) 48
51 (356) Overhead Conductors and Devices 31,542,125  1,214,453  458,790  —  —  32,297,788  (356) 49
52 (357) Underground Conduit 637,090  3,712  —  —  —  640,802  (357) 50
53 (358) Underground Conductors and Devices 4,384,549  311,567  —  —  —  4,696,116  (358) 51
54 (359) Roads and Trails —  —  —  —  —  (359) 52
55
TOTAL Transmission Plant (Enter Total of lines 44 thru 52)
197,489,544  13,579,287  1,982,177  —  —  209,086,654  53
56 4. DISTRIBUTION PLANT 54
57 (360) Land and Land Rights 848,086  —  507  —  —  847,579  (360) 55
58 (361) Structures and Improvements 1,355,914  21  —  —  —  1,355,935  (361) 56
59 (362) Station Equipment 38,503,847  7,125,839  929,175  —  3,500  44,704,011  (362) 57
60 (363) Storage Battery Equipment —  —  —  —  —  —  (363) 58
61 (364) Poles, Towers, and Fixtures 53,194,442  2,981,149  1,002,514  —  —  55,173,077  (364) 59
62 (365) Overhead Conductors and Devices 21,492,654  1,701,179  2,248,127  —  (3,500) 20,942,207  (365) 60
63 (366) Underground Conduit 10,063,729  273,724  8,319  —  —  10,329,133  (366) 61
64 (367) Underground Conductors and Devices 56,876,269  3,204,529  619,107  —  —  59,461,691  (367) 62
65 (368) Line Transformers 40,610,239  1,546,703  —  —  —  42,156,942  (368) 63
66 (369) Services 20,576,963  887,264  185,670  —  —  21,278,557  (369) 64
67 (370) Meters 13,517,261  560,411  463,246  —  —  13,614,426  (370) 65
68 (371) Installations on Customer Premises 112,821  19,911  38,242  —  —  94,489  (371) 66
69 (372) Leased Property on Customer Premises —  —  —  —  —  —  (372) 67
70 (373&388) Street Lighting and Signal Systems 9,005,194  253,799  10,812  —  —  9,248,181  (373) 68
71
(374) Asset Retirement Costs for Distribution Plant
—  —  —  —  —  —  (374) 69
72
TOTAL Distribution Plant (Enter Total of lines 55 thru 68)
266,157,419  18,554,529  5,505,719  —  —  279,206,228  70
73 5. GENERAL PLANT 71
74 (389) Land and Land Rights 106,828  —  —  —  —  106,828  (389) 72
75 (390) Structures and Improvements 1,947,981  —  162,598  —  —  1,785,383  (390) 73
76 (391) Office Furniture and Equipment 7,070  —  —  —  —  7,070  (391) 74
77 (392) Transportation Equipment 16,106,639  1,282,651  745,077  —  —  16,644,213  (392) 75
78 (393) Stores Equipment —  —  —  —  —  —  (393) 76
79 (394) Tools, Shop and Garage Equipment 2,101,135  89,019  52,598  —  —  2,137,556  (394) 77
80 (395) Laboratory Equipment —  —  —  —  —  —  (395) 78
81 (396) Power Operated Equipment 821,272  54,954  —  —  —  876,226  (396) 79
82 (397) Communication Equipment 3,050,152  140,483  17,070  —  —  3,173,564  (397) 80
83 (398) Miscellaneous Equipment —  —  —  —  —  —  (398) 81
84 SUBTOTAL (Enter Total of lines 71 thru 80) 24,141,077  1,567,107  977,343  —  —  24,730,840  82
85 (399) Other Tangible Property —  —  —  —  —  —  (399) 83
86
TOTAL General Plant (Enter Total of lines 81 and 82)
24,141,077  1,567,107  977,343  —  —  24,730,840  84
87 TOTAL (Accounts 101 and 106) 950,546,218  38,030,062  9,104,054  —  (44,833) 979,427,391  85
88 (102) Electric Plant Purchased (See Instr. 8) —  —  —  (102) 86
89 (Less) (102) Electric Plant Sold (See Instr. 8) —  —  —  —  (102) 87
90 (103) Experimental Plant Unclassified —  —  —  (103) 88
91 TOTAL Electric Plant in Service(Enter Total of lines 84 thru 87) 950,546,218  38,030,062  9,104,054  —  (44,833) 979,427,391  89

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ELECTRIC PLANT LEASED TO OTHERS (Account 104)
Line No.
LesseeName
Name of Lessee
(a)
IndicationOfAssociatedCompany
* (Designation of Associated Company)
(b)
LeaseDescription
Description of Property Leased
(c)
CommissionAuthorization
Commission Authorization
(d)
ExpirationDateOfLease
Expiration Date of Lease
(e)
ElectricPlantLeasedToOthers
Balance at End of Year
(f)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
TOTAL


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ELECTRIC PLANT HELD FOR FUTURE USE (Account 105)
  1. Report separately each property held for future use at end of the year having an original cost of $250,000 or more. Group other items of property held for future use.
  2. For property having an original cost of $250,000 or more previously used in utility operations, now held for future use, give in column (a), in addition to other required information, the date that utility use of such property was discontinued, and the date the original cost was transferred to Account 105.
Line No.
ElectricPlantHeldForFutureUseDescription
Description and Location of Property
(a)
ElectricPlantPropertyClassifiedAsHeldForFutureUseOriginalDate
Date Originally Included in This Account
(b)
ElectricPlantPropertyClassifiedAsHeldForFutureUseExpectedUseInServiceDate
Date Expected to be used in Utility Service
(c)
ElectricPlantHeldForFutureUse
Balance at End of Year
(d)
1 Land and Rights:
2
(a)
Montana Operations:
3
Townsend Transmission Sub site
01/01/2011
12/31/2022
1,763,378
4
Billings Hawthorn Park Sub site
01/01/2001
03/31/2022
739,910
5
Missoula Miller Creek Sub site
01/01/2001
12/31/2022
622,270
6
Billings Metra Sub Site
07/01/2019
12/31/2024
595,346
7
Belgrade West Sub site
06/01/2013
03/31/2022
425,694
8
Minor Projects (Less than $250,000 - 18 items)
1,316,521
21 Other Property:
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47 TOTAL
5,463,119


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: ElectricPlantHeldForFutureUseDescription
This schedule represents Montana Operations only.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
CONSTRUCTION WORK IN PROGRESS - - ELECTRIC (Account 107)
  1. Report below descriptions and balances at end of year of projects in process of construction (107).
  2. Show items relating to "research, development, and demonstration" projects last, under a caption Research, Development, and Demonstrating (see Account 107 of the Uniform System of Accounts).
  3. Minor projects (5% of the Balance End of the Year for Account 107 or $1,000,000, whichever is less) may be grouped.
Line No.
ConstructionWorkInProgressProjectDescription
Description of Project
(a)
ConstructionWorkInProgress
Construction work in progress - Electric (Account 107)
(b)
1
MONTANA
2
Maroney Radial Gate Upgrade
13,057,967
3
AMI Metering & Infrastructure
11,608,019
4
Billings Capacity Planning
11,027,852
5
BASE Distribution Mgmt System
6,890,695
6
Black Eagle U1 Turbine Upgrade
4,640,001
7
Lone to Meadow Reconductor
4,637,792
8
Madison Unit 4 Turbine Upgrade
4,536,457
9
Madison Unit 3 Turbine Upgrade
4,252,112
10
Holter U3 Turbine Upgrade
4,003,880
11
LAUREL CITY 100
3,505,708
12
South Butte 161-100s
2,899,907
13
RIMROCK SUB REBUILD
2,808,651
14
Hauser Unit 5 Turbine Upgrade
2,676,037
15
Street Light Program
2,603,655
16
Holter Unit 3 Generator Rewind
2,481,574
17
Missoula City Rebuild
1,885,711
18
Yellowtail to Billings 230kV
1,762,544
19
Environmental Management System
1,285,775
20
SOURDOUGH BANK
1,187,641
21
500KV SBSU RAS Upgrade/Replacement
1,110,112
22
E. Gallatin transformer upgrade
1,098,605
23
Line Creek to Red Lodge
1,061,626
24
Cochrane Intake Screen Upgrade
1,052,567
25
Minor Projects (Less than $1,000,000 - 293 items)
35,206,341
26
Huron Generating Station
77,767,877
27
Minor Projects (Less than $1,000,000 - 149 items)
6,383,507
43
211,432,612


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ACCUMULATED PROVISION FOR DEPRECIATION OF ELECTRIC UTILITY PLANT (Account 108)
  1. Explain in a footnote any important adjustments during year.
  2. Explain in a footnote any difference between the amount for book cost of plant retired, Line 12, column (c), and that reported for electric plant in service, page 204, column (d), excluding retirements of non-depreciable property.
  3. The provisions of Account 108 in the Uniform System of Accounts require that retirements of depreciable plant be recorded when such plant is removed from service. If the respondent has a significant amount of plant retired at year end which has not been recorded and/or classified to the various reserve functional classifications, make preliminary closing entries to tentatively functionalize the book cost of the plant retired. In addition, include all costs included in retirement work in progress at year end in the appropriate functional classifications.
  4. Show separately interest credits under a sinking fund or similar method of depreciation accounting.
Line No.
Item
(a)
Total (c + d + e)
(b)
Electric Plant in Service
(c)
Electric Plant Held for Future Use
(d)
Electric Plant Leased To Others
(e)
Section A. Balances and Changes During Year
1
AccumulatedProvisionForDepreciationOfElectricUtilityPlant
Balance Beginning of Year
(a)
1,781,407,694
1,781,407,694
2
Depreciation Provisions for Year, Charged to
3
DepreciationExpenseExcludingAdjustments
(403) Depreciation Expense
123,680,224
123,680,224
4
DepreciationExpenseForAssetRetirementCosts
(403.1) Depreciation Expense for Asset Retirement Costs
5
ExpensesOfElectricPlantLeasedToOthers
(413) Exp. of Elec. Plt. Leas. to Others
6
TransportationExpensesClearing
Transportation Expenses-Clearing
7
OtherClearingAccounts
Other Clearing Accounts
8
OtherAccounts
Other Accounts (Specify, details in footnote):
9.1
Other Accounts (Specify, details in footnote):
10
DepreciationProvision
TOTAL Deprec. Prov for Year (Enter Total of lines 3 thru 9)
123,680,224
123,680,224
11
Net Charges for Plant Retired:
12
BookCostOfRetiredPlant
Book Cost of Plant Retired
31,401,888
31,401,888
13
CostOfRemovalOfPlant
Cost of Removal
17,712,900
17,712,900
14
SalvageValueOfRetiredPlant
Salvage (Credit)
1,614,210
1,614,210
15
NetChargesForRetiredPlant
TOTAL Net Chrgs. for Plant Ret. (Enter Total of lines 12 thru 14)
47,500,578
47,500,578
16
OtherAdjustmentsToAccumulatedDepreciation
Other Debit or Cr. Items (Describe, details in footnote):
17.1
Other Debit or Cr. Items (Describe, details in footnote):
4,119
4,119
18
BookCostOfAssetRetirementCosts
Book Cost or Asset Retirement Costs Retired
19
AccumulatedProvisionForDepreciationOfElectricUtilityPlant
Balance End of Year (Enter Totals of lines 1, 10, 15, 16, and 18)
1,857,591,459
1,857,591,459
Section B. Balances at End of Year According to Functional Classification
20
AccumulatedDepreciationSteamProduction
Steam Production
143,925,968
143,925,968
21
AccumulatedDepreciationNuclearProduction
Nuclear Production
22
AccumulatedDepreciationHydraulicProductionConventional
Hydraulic Production-Conventional
142,909,696
142,909,696
23
AccumulatedDepreciationHydraulicProductionPumpedStorage
Hydraulic Production-Pumped Storage
24
AccumulatedDepreciationOtherProduction
Other Production
138,538,546
138,538,546
25
AccumulatedDepreciationTransmission
Transmission
462,695,095
462,695,095
26
AccumulatedDepreciationDistribution
Distribution
876,364,764
876,364,764
27
AccumulatedDepreciationRegionalTransmissionAndMarketOperation
Regional Transmission and Market Operation
28
AccumulatedDepreciationGeneral
General
93,157,390
93,157,390
29
AccumulatedProvisionForDepreciationOfElectricUtilityPlant
TOTAL (Enter Total of lines 20 thru 28)
1,857,591,459
1,857,591,459


FOOTNOTE DATA

(a) Concept: AccumulatedProvisionForDepreciationOfElectricUtilityPlant
Montana Operations
Section A. Balances and Changes During Year 2021 MONTANA DATA ONLY
Line
No.
Item Total (c+d+e) Electric Plant in
Service
(a) (b) (c)
1 Balance Beginning of Year 1,457,710,873  1,457,710,873 
2 Depreciation Provisions for Year, Charged to
3 (403) Depreciation Expense 98,518,420  98,518,420 
4 (403.1) Depreciation Expense for Asset Retirement Costs
5 (413) Exp. of Elec. Plt. Leas. to Others
6 Transportation Expenses-Clearing
7 Other Clearing Accounts
8 Other Accounts (Specify, details in footnote):
9
10 TOTAL Deprec. Prov for Year (Enter Total of lines 3 thru 9) 98,518,420  98,518,420 
11 Net Charges for Plant Retired:
12 Book Cost of Plant Retired 22,297,834  22,297,834 
13 Cost of Removal 14,911,788  14,911,788 
14 Salvage (Credit) 934,372  934,372 
15 TOTAL Net Chrgs. for Plant Ret. (Enter Total of lines 12 thru 14) 36,275,250  36,275,250 
16 Other Debit or Cr. Items (Describe, details in footnote): —  — 
17 Transfers 4,119  4,119 
18 Book Cost or Asset Retirement Costs Retired
19 Balance End of Year (Enter Totals of lines 1, 10, 15, 16, and 18) 1,519,958,162  1,457,710,873 
Section B. Balances at End of Year According to Functional Classification
20 Steam Production 28,741,795  28,741,795 
21 Nuclear Production — 
22 Hydraulic Production-Conventional 142,909,696  142,909,696 
23 Hydraulic Production-Pumped Storage — 
24 Other Production 90,795,521  90,795,521 
25 Transmission 388,743,372  388,743,372 
26 Distribution 784,667,994  784,667,994 
27 General 84,099,784  84,099,784 
28 TOTAL (Enter Total of lines 20 thru 27) 1,519,958,162  1,519,958,162 
South Dakota Operations
Section A. Balances and Changes During Year 2021 SOUTH DAKOTA DATA ONLY
Line
No.
Item Total (c+d+e) Electric Plant in
Service
(a) (b) (c)
1 Balance Beginning of Year 323,696,821  323,696,821 
2 Depreciation Provisions for Year, Charged to
3 (403) Depreciation Expense 25,161,804  25,161,804 
4 (403.1) Depreciation Expense for Asset Retirement Costs
5 (413) Exp. of Elec. Plt. Leas. to Others
6 Transportation Expenses-Clearing
7 Other Clearing Accounts
8 Other Accounts (Specify, details in footnote):
9
10 TOTAL Deprec. Prov for Year (Enter Total of lines 3 thru 9) 25,161,804  25,161,804 
11 Net Charges for Plant Retired:
12 Book Cost of Plant Retired 9,104,054  9,104,054 
13 Cost of Removal 2,801,112  2,801,112 
14 Salvage (Credit) 679,838  679,838 
15 TOTAL Net Chrgs. for Plant Ret. (Enter Total of lines 12 thru 14) 11,225,328  11,225,328 
16 Other Debit or Cr. Items (Describe, details in footnote): —  — 
17
18 Book Cost or Asset Retirement Costs Retired —  — 
19 Balance End of Year (Enter Totals of lines 1, 10, 15, 16, and 18) 337,633,297  337,633,297 
Section B. Balances at End of Year According to Functional Classification
20 Steam Production 115,184,173  115,184,173 
21 Nuclear Production —  — 
22 Hydraulic Production-Conventional —  — 
23 Hydraulic Production-Pumped Storage —  — 
24 Other Production 47,743,025  47,743,025 
25 Transmission 73,951,723  73,951,723 
26 Distribution 91,696,770  91,696,770 
27 General 9,057,606  9,057,606 
28 TOTAL (Enter Total of lines 20 thru 27) 337,633,297  337,633,297 
Section A. Balances and Changes During Year 2020 SOUTH DAKOTA DATA ONLY
Line
No.
Item Total (c+d+e) Electric Plant in
Service
(a) (b) (c)
1 Balance Beginning of Year 310,470,714  310,470,714 
2 Depreciation Provisions for Year, Charged to
3 (403) Depreciation Expense 27,430,056  27,430,056 
4 (403.1) Depreciation Expense for Asset Retirement Costs
5 (413) Exp. of Elec. Plt. Leas. to Others
6 Transportation Expenses-Clearing
7 Other Clearing Accounts
8 Other Accounts (Specify, details in footnote):
9
10 TOTAL Deprec. Prov for Year (Enter Total of lines 3 thru 9) 27,430,056  27,430,056 
11 Net Charges for Plant Retired:
12 Book Cost of Plant Retired 13,896,975  13,896,975 
13 Cost of Removal 3,208,390  3,208,390 
14 Salvage (Credit) 2,937,043  2,937,043 
15 TOTAL Net Chrgs. for Plant Ret. (Enter Total of lines 12 thru 14) 14,168,322  14,168,322 
16 Other Debit or Cr. Items (Describe, details in footnote): -35,627  -35,627 
17
18 Book Cost or Asset Retirement Costs Retired —  — 
19 Balance End of Year (Enter Totals of lines 1, 10, 15, 16, and 18) 323,696,821  323,732,448 
Section B. Balances at End of Year According to Functional Classification
20 Steam Production 112,587,519  112,587,519 
21 Nuclear Production —  — 
22 Hydraulic Production-Conventional —  — 
23 Hydraulic Production-Pumped Storage —  — 
24 Other Production 41,247,421  41,247,421 
25 Transmission 70,419,116  70,417,116 
26 Distribution 91,354,811  91,354,811 
27 General 8,087,954  8,087,954 
28 TOTAL (Enter Total of lines 20 thru 27) 323,696,821  323,694,821 

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
INVESTMENTS IN SUBSIDIARY COMPANIES (Account 123.1)
  1. Report below investments in Account 123.1, Investments in Subsidiary Companies.
  2. Provide a subheading for each company and list thereunder the information called for below. Sub-TOTAL by company and give a TOTAL in columns (e), (f), (g) and (h). (a) Investment in Securities - List and describe each security owned. For bonds give also principal amount, date of issue, maturity, and interest rate. (b) Investment Advances - Report separately the amounts of loans or investment advances which are subject to repayment, but which are not subject to current settlement. With respect to each advance show whether the advance is a note or open account. List each note giving date of issuance, maturity date, and specifying whether note is a renewal.
  3. Report separately the equity in undistributed subsidiary earnings since acquisition. The TOTAL in column (e) should equal the amount entered for Account 418.1.
  4. For any securities, notes, or accounts that were pledged designate such securities, notes, or accounts in a footnote, and state the name of pledgee and purpose of the pledge.
  5. If Commission approval was required for any advance made or security acquired, designate such fact in a footnote and give name of Commission, date of authorization, and case or docket number.
  6. Report column (f) interest and dividend revenues from investments, including such revenues from securities disposed of during the year.
  7. In column (h) report for each investment disposed of during the year, the gain or loss represented by the difference between cost of the investment (or the other amount at which carried in the books of account if different from cost) and the selling price thereof, not including interest adjustment includible in column (f).
  8. Report on Line 42, column (a) the TOTAL cost of Account 123.1.
Line No.
DescriptionOfInvestmentsInSubsidiaryCompanies
Description of Investment
(a)
DateOfAcquisitionInvestmentsInSubsidiaryCompanies
Date Acquired
(b)
DateOfMaturityInvestmentsInSubsidiaryCompanies
Date of Maturity
(c)
InvestmentInSubsidiaryCompanies
Amount of Investment at Beginning of Year
(d)
EquityInEarningsOfSubsidiaryCompanies
Equity in Subsidiary Earnings of Year
(e)
InterestAndDividendRevenueFromInvestments
Revenues for Year
(f)
InvestmentInSubsidiaryCompanies
Amount of Investment at End of Year
(g)
InvestmentGainLossOnDisplosal
Gain or Loss from Investment Disposed of
(h)
1
NorthWestern Services, LLC
2
NorthWestern Services, LLC - Capital Stock
3
NorthWestern Services, LLC - Paid in Capital
1,803,694
1,803,694
4
NorthWestern Services, LLC - Equity in Undistributed Earnings
213,858
46,490
260,348
5
Risk Partners Assurance, Ltd.
6
Risk Partners Assurance, Ltd. - Capital Stock
1,520,000
1,520,000
7
Risk Partners Assurance, Ltd. - Equity in Undistributed Earnings
272,228
57,632
329,860
8
Canadian Montana Pipeline Corporation
02/15/2002
9
Canadian Montana Pipeline Corporation - Translation Adjustment
1,747,426
1,691,139
10
Canadian Montana Pipeline Corporation - Paid in Capital
1,388,429
1,388,429
11
Canadian Montana Pipeline Corporation - Equity in Undistributed Earnings
1,483,498
303,913
1,787,411
12
Havre Pipeline Company
12/01/2013
13
Havre Pipeline Company - Paid in Capital
13,301,138
13,346,105
14
Havre Pipeline Company - Equity in Undistributed Earnings
81,513
1,134,532
1,216,045
15
NorthWestern Energy Solutions
06/01/2018
16
NorthWestern Energy Solutions - Capital Stock
2,676,874
4,182,095
17
NorthWestern Energy Solutions - Equity in Undistributed Earnings
48,233
7,548
55,781
42
Total Cost of Account 123.1 $
760,967
Total
23,732,943
849,309
24,377,535


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
MATERIALS AND SUPPLIES
  1. For Account 154, report the amount of plant materials and operating supplies under the primary functional classifications as indicated in column (a); estimates of amounts by function are acceptable. In column (d), designate the department or departments which use the class of material.
  2. Give an explanation of important inventory adjustments during the year (in a footnote) showing general classes of material and supplies and the various accounts (operating expenses, clearing accounts, plant, etc.) affected debited or credited. Show separately debit or credits to stores expense clearing, if applicable.
Line No.
Account
(a)
Balance Beginning of Year
(b)
Balance End of Year
(c)
Department or Departments which Use Material
(d)
1
Fuel Stock (Account 151)
6,561,463
7,509,623
Electric & Gas
2
Fuel Stock Expenses Undistributed (Account 152)
3
Residuals and Extracted Products (Account 153)
4
Plant Materials and Operating Supplies (Account 154)
5
Assigned to - Construction (Estimated)
41,117,314
51,295,115
Electric, Gas, & C
6
7
Production Plant (Estimated)
533,642
517,603
Electric & Gas
8
Transmission Plant (Estimated)
541,556
458,202
Electric, Gas, & C
9
Distribution Plant (Estimated)
1,499,307
1,267,805
Electric, Gas, & C
10
Regional Transmission and Market Operation Plant (Estimated)
11
Assigned to - Other (provide details in footnote)
12
TOTAL Account 154 (Enter Total of lines 5 thru 11)
43,691,819
53,538,725
13
Merchandise (Account 155)
14
Other Materials and Supplies (Account 156)
15
Nuclear Materials Held for Sale (Account 157) (Not applic to Gas Util)
16
Stores Expense Undistributed (Account 163)
17
18
19
20
TOTAL Materials and Supplies
50,253,282
(a)(b)
61,048,348


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: MaterialsAndOperatingSupplies
Montana Operations
Line
No.
Account

(a)
Gas


(b)
Electric
Transmission

(c )
Other Electric


(d)
Total


(e)
1 Fuel Stock (Account 151) 449,295  —  1,409,604  1,858,899 
2 Fuel Stock Expense Undistributed (Account 152) — 
3 Residuals and Extracted Products (Account 153)
4 Plant Materials and Operating Supplies (Account 154)
5 Assigned to - Construction (Estimated) 5,187,893  5,487,530  26,230,944  36,906,367 
6 Assigned to - Operations and Maintenance
7 Production Plant (Estimated) 1,180  —  282,744  283,924 
8 Transmission Plant (Estimated) 86,284  235,262  —  321,546 
9 Distribution Plant (Estimated) 134,952  —  841,834  976,786 
10 Regional Transmission and Market Operation Plant (Estimated)
11 Assigned to - Other
12 TOTAL Account 154 (Enter Total of lines 5 thru 10) 5,410,309  5,722,792  27,355,522  38,488,623 
13 Merchandise (Account 155)
14 Other Materials and Supplies (Account 156)
15 Nuclear Materials Held for Sale (Account 157)
16 Store Expense Undistributed (Account 163)
17
18
19
20 TOTAL Materials and Supplies (Per Balance Sheet) 5,859,604  5,722,792  28,765,126  40,347,522 
(b) Concept: MaterialsAndOperatingSupplies
Montana Operations
Line
No.
Account

(a)
Balance
Beginning of
Year
(b)
Balance
End of Year
(c )
Estimate of
Portion
Attributable to
Construction
Balance
End of Year
w/ Assigned
to
Construction
(c )
Department or
Departments which
Use Material
(d)
1 Fuel Stock (Account 151) 1,576,044  1,858,899  1,858,899  Electric & Gas
2 Fuel Stock Expense Undistributed (Account 152)
3 Residuals and Extracted Products (Account 153)
4 Plant Materials and Operating Supplies (Account 154)
5 Assigned to - Construction (Estimated) —  —  36,906,367  36,906,367  Electric, Gas, & Common
6 Assigned to - Operatons and Maintenance
7 Production Plant (Estimated) 5,808,465  6,906,484  (6,622,561) 283,924  Electric & Gas
8 Transmission Plant (Estimated) 6,714,035  7,821,658  (7,500,112) 321,546  Electric, Gas, & Common
9 Distribution Plant (Estimated) 19,581,736  23,760,481  (22,783,694) 976,786  Electric, Gas, & Common
10 Regional Transmission and Market Operation Plant (Estimated)
11 Assigned to - Other —  —  — 
12 TOTAL Account 154 (Enter Total of lines 5 thru 10) 32,104,236  38,488,623  —  38,488,623 
13 Merchandise (Account 155)
14 Other Materials and Supplies (Account 156)
15 Nuclear Materials Held for Sale (Account 157)
16 Store Expense Undistributed (Account 163) —  — 
17
18
19
20 TOTAL Materials and Supplies (Per Balance Sheet) 33,680,280  40,347,522  —  40,347,522 
South Dakota Operations
Line
No.
Account

(a)
Balance
Beginning of
Year
(b)
Balance
End of Year
(c )
Estimate of
Portion
Attributable to
Construction
Balance
End of Year w/ Assigned to
Construction

(c )
Department or
Departments which
Use Material
(d)
1 Fuel Stock (Account 151) 4,985,419  5,650,724  5,650,724  Electric & Gas
2 Fuel Stock Expense Undistributed (Account 152)
3 Residuals and Extracted Products (Account 153)
4 Plant Materials and Operating Supplies (Account 154)
5 Assigned to - Construction (Estimated) —  —  14,388,750  14,388,749  Electric & Gas
6 Assigned to - Operations and Maintenance
7 Production Plant (Estimated) 3,852,519  5,317,724  (5,084,045) 233,679  Electric & Gas
8 Transmission Plant (Estimated) 2,504,702  3,109,821  (2,973,164) 136,656  Electric & Gas
9 Distribution Plant (Estimated) 5,230,362  6,622,557  (6,331,541) 291,018  Electric & Gas
10 Regional Transmission and Market Operation Plant (Estimated)
11 Assigned to - Other —  —  —  Common
12 TOTAL Account 154 (Enter Total of lines 5 thru 10) 11,587,583  15,050,102  —  15,050,102 
13 Merchandise (Account 155)
14 Other Materials and Supplies (Account 156) Electric & Gas
15 Nuclear Materials Held for Sale (Account 157)
16 Store Expense Undistributed (Account 163) Electric & Gas
17
18
19
20 TOTAL Materials and Supplies (Per Balance Sheet) 16,573,002  20,700,826  —  20,700,826 

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Allowances (Accounts 158.1 and 158.2)
  1. Report below the particulars (details) called for concerning allowances.
  2. Report all acquisitions of allowances at cost.
  3. Report allowances in accordance with a weighted average cost allocation method and other accounting as prescribed by General Instruction No. 21 in the Uniform System of Accounts.
  4. Report the allowances transactions by the period they are first eligible for use: the current year’s allowances in columns (b)-(c), allowances for the three succeeding years in columns (d)-(i), starting with the following year, and allowances for the remaining succeeding years in columns (j)-(k).
  5. Report on Line 4 the Environmental Protection Agency (EPA) issued allowances. Report withheld portions Lines 36-40.
  6. Report on Line 5 allowances returned by the EPA. Report on Line 39 the EPA’s sales of the withheld allowances. Report on Lines 43-46 the net sales proceeds and gains/losses resulting from the EPA’s sale or auction of the withheld allowances.
  7. Report on Lines 8-14 the names of vendors/transferors of allowances acquired and identify associated companies (See "associated company" under "Definitions" in the Uniform System of Accounts).
  8. Report on Lines 22 - 27 the name of purchasers/ transferees of allowances disposed of and identify associated companies.
  9. Report the net costs and benefits of hedging transactions on a separate line under purchases/transfers and sales/transfers.
  10. Report on Lines 32-35 and 43-46 the net sales proceeds and gains or losses from allowance sales.
Current Year Year One Year Two Year Three Future Years Totals
Line No.
SO2 Allowances Inventory (Account 158.1)
(a)
No.
(b)
Amt.
(c)
No.
(d)
Amt.
(e)
No.
(f)
Amt.
(g)
No.
(h)
Amt.
(i)
No.
(j)
Amt.
(k)
No.
(l)
Amt.
(m)
1
Balance-Beginning of Year
4,106
4,106
4,106
4,106
46,221
62,645
2
3
Acquired During Year:
4
Issued (Less Withheld Allow)
5
Returned by EPA
6
7
8
Purchases/Transfers:
9
10
11
12
13
14
15
Total
16
17
Relinquished During Year:
18
Charges to Account 509
19
Other:
20
Allowances Used
20.1
Allowances Used
21
Cost of Sales/Transfers:
22
23
24
25
26
27
28
Total
29
Balance-End of Year
4,106
4,106
4,106
4,106
49,450
65,874
30
31
Sales:
32
Net Sales Proceeds(Assoc. Co.)
33
Net Sales Proceeds (Other)
34
Gains
35
Losses
Allowances Withheld (Acct 158.2)
36
Balance-Beginning of Year
37
Add: Withheld by EPA
38
Deduct: Returned by EPA
39
Cost of Sales
40
Balance-End of Year
41
42
Sales
43
Net Sales Proceeds (Assoc. Co.)
44
Net Sales Proceeds (Other)
45
Gains
46
Losses


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Allowances (Accounts 158.1 and 158.2)
  1. Report below the particulars (details) called for concerning allowances.
  2. Report all acquisitions of allowances at cost.
  3. Report allowances in accordance with a weighted average cost allocation method and other accounting as prescribed by General Instruction No. 21 in the Uniform System of Accounts.
  4. Report the allowances transactions by the period they are first eligible for use: the current year’s allowances in columns (b)-(c), allowances for the three succeeding years in columns (d)-(i), starting with the following year, and allowances for the remaining succeeding years in columns (j)-(k).
  5. Report on Line 4 the Environmental Protection Agency (EPA) issued allowances. Report withheld portions Lines 36-40.
  6. Report on Line 5 allowances returned by the EPA. Report on Line 39 the EPA’s sales of the withheld allowances. Report on Lines 43-46 the net sales proceeds and gains/losses resulting from the EPA’s sale or auction of the withheld allowances.
  7. Report on Lines 8-14 the names of vendors/transferors of allowances acquired and identify associated companies (See "associated company" under "Definitions" in the Uniform System of Accounts).
  8. Report on Lines 22 - 27 the name of purchasers/ transferees of allowances disposed of and identify associated companies.
  9. Report the net costs and benefits of hedging transactions on a separate line under purchases/transfers and sales/transfers.
  10. Report on Lines 32-35 and 43-46 the net sales proceeds and gains or losses from allowance sales.
Current Year Year One Year Two Year Three Future Years Totals
Line No.
NOx Allowances Inventory (Account 158.1)
(a)
No.
(b)
Amt.
(c)
No.
(d)
Amt.
(e)
No.
(f)
Amt.
(g)
No.
(h)
Amt.
(i)
No.
(j)
Amt.
(k)
No.
(l)
Amt.
(m)
Allowances Withheld (Acct 158.2)
36
Balance-Beginning of Year
37
Add: Withheld by EPA
38
Deduct: Returned by EPA
39
Cost of Sales
40
Balance-End of Year
41
42
Sales
43
Net Sales Proceeds (Assoc. Co.)
44
Net Sales Proceeds (Other)
45
Gains
46
Losses


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
EXTRAORDINARY PROPERTY LOSSES (Account 182.1)
WRITTEN OFF DURING YEAR
Line No.
DescriptionOfExtraordinaryPropertyLoss
Description of Extraordinary Loss [Include in the description the date of Commission Authorization to use Acc 182.1 and period of amortization (mo, yr to mo, yr).]
(a)
ExtraordinaryPropertyLossesNotYetRecognized
Total Amount of Loss
(b)
ExtraordinaryPropertyLossesRecognized
Losses Recognized During Year
(c)
ExtraordinaryPropertyLossesWrittenOffAccountCharged
Account Charged
(d)
ExtraordinaryPropertyLossesWrittenOff
Amount
(e)
ExtraordinaryPropertyLosses
Balance at End of Year
(f)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
20 TOTAL


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
UNRECOVERED PLANT AND REGULATORY STUDY COSTS (182.2)
WRITTEN OFF DURING YEAR
Line No.
DescriptionOfUnrecoveredPlantAndRegulatoryStudyCosts
Description of Unrecovered Plant and Regulatory Study Costs [Include in the description of costs, the date of COmmission Authorization to use Acc 182.2 and period of amortization (mo, yr to mo, yr)]
(a)
UnrecoveredPlantAndRegulatoryStudyCostsNotYetRecognized
Total Amount of Charges
(b)
UnrecoveredPlantAndRegulatoryStudyCostsRecognized
Costs Recognized During Year
(c)
UnrecoveredPlantAndRegulatoryStudyCostsWrittenOffAccountCharged
Account Charged
(d)
UnrecoveredPlantAndRegulatoryStudyCostsWrittenOff
Amount
(e)
UnrecoveredPlantAndRegulatoryStudyCosts
Balance at End of Year
(f)
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
TOTAL


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Transmission Service and Generation Interconnection Study Costs
  1. Report the particulars (details) called for concerning the costs incurred and the reimbursements received for performing transmission service and generator interconnection studies.
  2. List each study separately.
  3. In column (a) provide the name of the study.
  4. In column (b) report the cost incurred to perform the study at the end of period.
  5. In column (c) report the account charged with the cost of the study.
  6. In column (d) report the amounts received for reimbursement of the study costs at end of period.
  7. In column (e) report the account credited with the reimbursement received for performing the study.
Line No.
DescriptionOfStudyPerformed
Description
(a)
StudyCostsIncurred
Costs Incurred During Period
(b)
StudyCostsAccountCharged
Account Charged
(c)
StudyCostsReimbursements
Reimbursements Received During the Period
(d)
StudyCostsAccountReimbursed
Account Credited With Reimbursement
(e)
1
Transmission Studies
2
FAC Studies
41,439
229,789
3
SIS Studies
130,066
230,327
4
Line Interconnection Studies
32,205
53,090
20
Total
203,710
513,206
21
Generation Studies
22
FAC Studies
287,673
1,843,179
23
SIS Studies
251,787
1,250,652
24
FEA Studies
307,554
361,375
25
Optional Studies
78,695
176,530
39
Total
925,709
3,631,736
40 Grand Total
1,129,419
4,144,942


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
OTHER REGULATORY ASSETS (Account 182.3)
  1. Report below the particulars (details) called for concerning other regulatory assets, including rate order docket number, if applicable.
  2. Minor items (5% of the Balance in Account 182.3 at end of period, or amounts less than $100,000 which ever is less), may be grouped by classes.
  3. For Regulatory Assets being amortized, show period of amortization.
CREDITS
Line No.
DescriptionAndPurposeOfOtherRegulatoryAssets
Description and Purpose of Other Regulatory Assets
(a)
OtherRegulatoryAssets
Balance at Beginning of Current Quarter/Year
(b)
IncreaseDecreaseInOtherRegulatoryAssets
Debits
(c)
OtherRegulatoryAssetsWrittenOffAccountCharged
Written off During Quarter/Year Account Charged
(d)
OtherRegulatoryAssetsWrittenOffRecovered
Written off During the Period Amount
(e)
OtherRegulatoryAssets
Balance at end of Current Quarter/Year
(f)
1
Flow-through Income Taxes (Montana)
367,980,339
37,946,519
405,926,858
2
Excess Deferred Income Taxes (Montana)
60,004,697
6,275,252
(a)
53,729,445
3
Basin Creek Capital Lease (Montana)
6,381,745
657,506
5,724,239
4
BPA Residential Exchange Program (Montana) - Docket 2018.8.49 Order 7630; Annual Amortization
1,159,827
7,325,012
7,220,059
1,264,780
5
Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization
12,795,991
5,096,063
16,223,738
1,668,316
6
FAS 106 (Montana) - Docket 93.6.24 and Docket 2009.9.129
5,062,932
586,811
4,476,121
7
FAS 112 (Montana) - Docket 93.6.24 and Docket 2009.9.129
5,532,753
139,725
5,393,028
8
CTC QF Over/Under Collections (Montana) - Docket 97.7.90 and Docket 2001.1.5; Annual Amortization
818,383
976,577
1,794,960
9
Compensated Absences (Montana) - Docket 97.11.219
11,920,625
1,037,027
1,178,848
11,778,804
10
Pension Plan (Montana)
132,955,624
13,626,764
53,550,676
93,031,712
11
Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637
538,376
23,242
561,618
12
Montana Public Service Commission (Montana) - Docket 2017.9.78 - Order 7568
4,569,603
874,989
1,160,629
4,283,963
13
Natural Gas Transmission Verification Program (Montana) - Docket D2016.11.88
1,726,630
575,543
1,151,087
14
Study of the Costs & Benefits of Customer Generators (Montana)
113,155
5,064
52,225
65,994
15
Asset Retirement Obligation (Montana)
17,081,951
1,948,692
6,413,926
12,616,717
16
Flow-through Income Taxes (South Dakota)
52,945,057
5,791,792
58,736,849
17
Excess Deferred Income Taxes (South Dakota)
7,251,165
167,880
(b)
7,083,285
18
Pension Plan (South Dakota)
5,611,370
307,140
5,304,230
19
Manufactured Gas Plants (South Dakota) - Docket NG 11-003
11,126,638
451,326
316,229
11,261,735
20
Field Inventory (South Dakota) - Docket EL 14-106
442,023
89,916
352,107
21
Asset Retirement Obligation (South Dakota)
6,138,384
166,050
5,566,538
737,896
22
Current Ad Valorem True-Up (South Dakota) - Docket GE 98-001
111,181
111,181
23
COVID Deferral (South Dakota)
227,622
227,622
24
Nebraska 2021 Natural Gas Cold Weather Event - Docket NG-111/PI-237
25,523,755
25,523,755
44
TOTAL
712,384,890
100,904,053
128,140,159
685,148,784


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: OtherRegulatoryAssets
Line
No.
Description (a) (b) (c) (d)
MONTANA:
12/31/2020
Protected Unprotected
TCJA Excess ADIT Account Reduced 190 190 Subtotal
Reg Asset Acccount Impacted 182.3 182.3 182.3
1 Electric:
2 Regulatory Assets / Liabilities (20,354) (20,354)
3 Unbilled Revenue 962,125  962,125 
4 Compensation Accruals 1,051,940  1,051,940 
5 Reserves & Accruals 251,740  251,740 
6 Intangible amortization —  — 
7 Pension / Postretirement Benefits 6,898,831  6,898,831 
8 Environmental Liability 370,257  370,257 
9 Interest Rate Hedge —  — 
10 Customer Advances 3,261,847  3,261,847 
11 Excess Tax Depreciation / Other Property — 
12 Net Operating Loss 27,858,813  —  27,858,813 
13 Total Electric 27,858,813  12,776,386  40,635,199 
14 Gas:
15 Regulatory Assets / Liabilities (25,641) (25,641)
16 Unbilled Revenue 534,514  534,514 
17 Compensation Accruals 584,411  584,411 
18 Reserves & Accruals 116,195  116,195 
19 Intangible amortization —  — 
20 Pension / Postretirement Benefits 3,834,145  3,834,145 
21 Environmental Liability 205,698  205,698 
22 Interest Rate Hedge —  — 
23 Customer Advances 1,264,062  1,264,062 
24 Excess Tax Depreciation / Other Property — 
25 Net Operating Loss (3,623,068) —  (3,623,068)
26 Total Gas (3,623,068) 6,513,384  2,890,316 
27 Other (Specify) —  678,445  678,445 
28 Subtotal 24,235,745  19,968,215  44,203,960 
29 Gross-up 8,663,085  7,137,652  15,800,737 
30 Total 32,898,830  27,105,867  60,004,697 
31
32 Other (Specify)
33 QF Obligations —  —  — 
34 NOL Carryforward —  —  — 
35 AMT Credit Carryforward —  —  — 
36 Production Tax Credit —  —  — 
37 Regulatory Assets / Liabilities —  —  — 
38 Other, net —  678,445  678,445 
39 Total —  678,445  678,445 
40
41
42 12/31/2021
43 Protected Unprotected
44 TCJA Excess ADIT Account Reduced 190 190 Subtotal
45 Reg Asset Acccount Impacted 182.3 182.3 182.3
46 Electric:
47 Regulatory Assets / Liabilities (8,341) (8,341)
48 Unbilled Revenue 687,232  687,232 
49 Compensation Accruals 751,386  751,386 
50 Reserves & Accruals 179,940  179,940 
51 Intangible amortization —  — 
52 Pension / Postretirement Benefits 4,927,736  4,927,736 
53 Environmental Liability 264,469  264,469 
54 Interest Rate Hedge —  — 
55 Customer Advances 2,329,891  2,329,891 
56 Excess Tax Depreciation / Other Property — 
57 Net Operating Loss 26,940,081  —  26,940,081 
58 Total Electric 26,940,081  9,132,313  36,072,394 
59 Gas:
60 Regulatory Assets / Liabilities (25,641) (25,641)
61 Unbilled Revenue 534,514  534,514 
62 Compensation Accruals 584,411  584,411 
63 Reserves & Accruals 116,195  116,195 
64 Intangible amortization —  — 
65 Pension / Postretirement Benefits 3,834,145  3,834,145 
66 Environmental Liability 205,698  205,698 
67 Interest Rate Hedge —  — 
68 Customer Advances 1,264,062  1,264,062 
69 Excess Tax Depreciation / Other Property — 
70 Net Operating Loss (3,503,486) —  (3,503,486)
71 Total Gas (3,503,486) 6,513,384  3,009,898 
72 Other (Specify) —  498,848  498,848 
73 Subtotal 23,436,595  16,144,545  39,581,140 
74 Gross-up 8,377,427  5,770,878  14,148,305 
75 Total 31,814,022  21,915,423  53,729,445 
76
77 Other (Specify)
78 QF Obligations —  —  — 
79 NOL Carryforward —  —  — 
80 AMT Credit Carryforward —  —  — 
81 Production Tax Credit —  —  — 
82 Regulatory Assets / Liabilities —  —  — 
83 Other, net —  498,848  498,848 
84 Total —  498,848  498,848 
85
86
87 SOUTH DAKOTA:
88 12/31/2020
89 Protected Unprotected
90 TCJA Excess ADIT Account Reduced 190 190 Subtotal
91 Reg Asset Acccount Impacted 182.3 182.3 182.3
92 Electric:
93 Regulatory Assets / Liabilities —  — 
94 Unbilled Revenue —  — 
95 Compensation Accruals —  — 
96 Reserves & Accruals —  — 
97 Intangible amortization —  — 
98 Pension / Postretirement Benefits —  — 
99 Environmental Liability —  — 
100 Interest Rate Hedge —  — 
101 Customer Advances —  — 
102 Excess Tax Depreciation / Other Property — 
103 Net Operating Loss 4,139,964  —  4,139,964 
104 Total Electric 4,139,964  —  4,139,964 
105 Gas:
106 Regulatory Assets / Liabilities —  — 
107 Unbilled Revenue 237,268  237,268 
108 Compensation Accruals 895,742  895,742 
109 Reserves & Accruals 66,862  66,862 
110 Intangible amortization —  — 
111 Pension / Postretirement Benefits (67,853) (67,853)
112 Environmental Liability 491,773  491,773 
113 Interest Rate Hedge —  — 
114 Customer Advances —  — 
115 Excess Tax Depreciation / Other Property — 
116 Net Operating Loss (165,266) —  (165,266)
117 Total Gas (165,266) 1,623,792  1,458,526 
118 Other (Specify) —  129,930  129,930 
119 Subtotal 3,974,698  1,753,722  5,728,420 
120 Gross-up 1,056,566  466,179  1,522,745 
121 Total 5,031,264  2,219,901  7,251,165 
122
123 Other (Specify)
124 QF Obligations —  —  — 
125 NOL Carryforward —  —  — 
126 AMT Credit Carryforward —  —  — 
127 Production Tax Credit —  —  — 
128 Regulatory Assets / Liabilities —  —  — 
129 Other, net —  129,930  129,930 
130 Total —  129,930  129,930 
131
132
133 12/31/2021
134 Protected Unprotected
135 TCJA Excess ADIT Account Reduced 190 190 Subtotal
136 Reg Asset Acccount Impacted 182.3 182.3 182.3
137 Electric:
138 Regulatory Assets / Liabilities —  — 
139 Unbilled Revenue —  — 
140 Compensation Accruals —  — 
141 Reserves & Accruals —  — 
142 Intangible amortization —  — 
143 Pension / Postretirement Benefits —  — 
144 Environmental Liability —  — 
145 Interest Rate Hedge —  — 
146 Customer Advances —  — 
147 Excess Tax Depreciation / Other Property — 
148 Net Operating Loss 4,001,825  —  4,001,825 
149 Total Electric 4,001,825  —  4,001,825 
150 Gas:
151 Regulatory Assets / Liabilities —  — 
152 Unbilled Revenue 237,268  237,268 
153 Compensation Accruals 895,742  895,742 
154 Reserves & Accruals 66,862  66,862 
155 Intangible amortization —  — 
156 Pension / Postretirement Benefits (67,853) (67,853)
157 Environmental Liability 491,773  491,773 
158 Interest Rate Hedge —  — 
159 Customer Advances —  — 
160 Excess Tax Depreciation / Other Property — 
161 Net Operating Loss (159,752) —  (159,752)
162 Total Gas (159,752) 1,623,792  1,464,040 
163 Other (Specify) —  129,930  129,930 
164 Subtotal 3,842,073  1,753,722  5,595,795 
165 Gross-up 1,021,311  466,179  1,487,490 
166 Total 4,863,384  2,219,901  7,083,285 
167
168 Other (Specify)
169 QF Obligations —  —  — 
170 NOL Carryforward —  —  — 
171 AMT Credit Carryforward —  —  — 
172 Production Tax Credit —  —  — 
173 Regulatory Assets / Liabilities —  —  — 
174 Other, net —  129,930  129,930 
175 Total —  129,930  129,930 
(b) Concept: OtherRegulatoryAssets
Refer to footnote at column (f) line 2 for details.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
MISCELLANEOUS DEFFERED DEBITS (Account 186)
  1. Report below the particulars (details) called for concerning miscellaneous deferred debits.
  2. For any deferred debit being amortized, show period of amortization in column (a)
  3. Minor item (1% of the Balance at End of Year for Account 186 or amounts less than $100,000, whichever is less) may be grouped by classes.
CREDITS
Line No.
Description of Miscellaneous Deferred Debits
(a)
Balance at Beginning of Year
(b)
Debits
(c)
Credits Account Charged
(d)
Credits Amount
(e)
Balance at End of Year
(f)
1
Montana Operations:
2
Energy Stored in Out of State Utilities (Montana)
986
17,918
16,761
2,143
3
500 kV Operations - Partner's Share (Montana)
167,198
3,688,996
4,005,425
149,231
4
PPLM Share of WET Tax (Montana)
2,021
24,914
25,960
975
5
Transmission Line Rights (Montana)
318,191
90,909
227,282
6
South Dakota Operations:
7
Deferred Fuel for Electric Generation (South Dakota)
53,219
4,767,573
4,596,520
224,272
8
Pension Requirement (South Dakota)
7,001,303
1,587,306
291,549
8,297,060
47
Miscellaneous Work in Progress
48
Deferred Regulatroy Comm. Expenses (See pages 350 - 351)
49
TOTAL
7,542,918
8,602,501


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ACCUMULATED DEFERRED INCOME TAXES (Account 190)
  1. Report the information called for below concerning the respondent’s accounting for deferred income taxes.
  2. At Other (Specify), include deferrals relating to other income and deductions.
Line No.
DescriptionOfAccumulatedDeferredIncomeTax
Description and Location
(a)
AccumulatedDeferredIncomeTaxes
Balance at Beginning of Year
(b)
AccumulatedDeferredIncomeTaxes
Balance at End of Year
(c)
1
Electric
2
Compensation Accruals
7,488,978
6,881,461
3
4
Pension/Postretirement Benefits
23,108,993
15,636,841
5
Reserves and Accruals
6,056,707
5,251,728
6
Unbilled Revenue
10,054,963
7,253,941
7
Regulatory Asset/Liability
(a)
30,677
61,733
8
7
Other
(b)
26,279,964
23,120,514
8
TOTAL Electric (Enter Total of lines 2 thru 7)
73,020,282
58,206,218
9
Gas
10
11
Regulatory Asset/Liability
135,111
115,910
12
13
Pension/Postretirement Benefits
8,756,835
5,797,891
14
Unbilled Revenue
4,373,885
3,449,825
15
Reserves and Accruals
680,130
640,552
16
Compensation Accruals
4,259,348
3,730,902
15
Other
(c)
35,134,297
7,012,661
16
TOTAL Gas (Enter Total of lines 10 thru 15)
16,928,988
20,747,741
16.0
Other (Specify)
(d)
114,743,245
81,960,145
17
Other (Specify)
18
TOTAL (Acct 190) (Total of lines 8, 16 and 17)
170,834,539
160,914,104
Notes
Electric


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: AccumulatedDeferredIncomeTaxes
Accumulated Deferred Income Taxes
(Account 190)
MONTANA OPERATIONS SOUTH DAKOTA OPERATIONS
Line
No.
Description and Location (a) Balance at
Beg of Year
Balance at
End of Year
Balance at
Beg of Year
Balance at
End of Year
(b) (c) (b) (c)
Electric:
1 Regulatory Assets/Liabilities 30,677  61,733  —  — 
2 Unbilled Revenue 8,539,992  5,199,060  1,514,971  2,054,881 
3 Compensation Accruals 3,087,502  3,434,770  4,401,477  3,446,692 
4 Reserves & Accruals 5,679,654  4,865,834  377,053  385,893 
5 Pension / Postretirement Benefits 23,862,740  16,564,125  (753,747) (927,284)
6 Environmental Liability 1,610,590  1,519,396  2,242,121  2,119,316 
7 Interest Rate Hedge 3,851,806  3,690,192  —  — 
8 Customer Advances 13,336,520  16,323,844  —  — 
9 NOL Carryforward 5,468,683  —  450,700  — 
10 Total Electric 65,468,164  51,658,954  8,232,575  7,079,498 
11 Gas:
12 Regulatory Liabilities (2,712) 9,204  137,823  106,706 
13 Unbilled Revenue 3,321,108  2,021,857  1,052,777  1,427,968 
14 Compensation Accruals 1,200,695  1,335,744  3,058,653  2,395,159 
15 Reserves & Accruals 418,110  372,389  262,020  268,163 
16 Pension / Postretirement Benefits 9,280,625  6,442,275  (523,790) (644,384)
17 Environmental Liability 627,856  592,392  1,558,084  1,472,745 
18 Customer Advances 3,828,695  4,947,524 
19 NOL Carryforward (39,014,868) —  (2,134,065) — 
20 Total Gas (20,340,491) 15,721,385  3,411,502  5,026,357 
21 Other (Specify) (5,348,354) 540,792  724,740  963,409 
22 Total (Acct 190) (Total of lines 10,
20, and 21)
39,779,319  67,921,131  12,368,817  13,069,264 
Account 190 Other (Specify)
QF Obligations —  —  —  — 
NOL Carryforward (7,112,106) —  —  — 
Other, net 1,763,752  540,792  724,740  963,409 
Total (5,348,354) 540,792  724,740  963,409 
(b) Concept: AccumulatedDeferredIncomeTaxes
Electric Other: Balance at
Beg of Year
Balance at End
of Year
(a) (b) (c)
Environmental Liability 3,852,711  3,638,713 
Interest Rate Hedge 3,171,351  3,157,957 
Customer Advances 13,336,520  16,323,844 
NOL Carryforward 5,919,382  — 
26,279,964  23,120,514 
(c) Concept: AccumulatedDeferredIncomeTaxes
Gas Other: Balance at
Beg of Year
Balance at End
of Year
(a) (b) (c)
Environmental Liability 2,185,940  2,065,137 
Customer Advances 3,828,695  4,947,524 
NOL Carryforward (41,148,932) — 
(35,134,297) 7,012,661 
(d) Concept: AccumulatedDeferredIncomeTaxes
Description and Location Balance at
Beg of Year
Balance at
End of Year
Line 17 Detail
Reserves & Accruals —  — 
NOL Carryforward 43,697,562  — 
AMT Credit Carryforward —  — 
Production Tax Credit 63,542,446  75,091,906 
Other, net 7,503,237  6,868,239 
Total 114,743,245  81,960,145 

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
CAPITAL STOCKS (Account 201 and 204)
  1. Report below the particulars (details) called for concerning common and preferred stock at end of year, distinguishing separate series of any general class. Show separate totals for common and preferred stock. If information to meet the stock exchange reporting requirement outlined in column (a) is available from the SEC 10-K Report Form filing, a specific reference to report form (i.e., year and company title) may be reported in column (a) provided the fiscal years for both the 10-K report and this report are compatible.
  2. Entries in column (b) should represent the number of shares authorized by the articles of incorporation as amended to end of year.
  3. Give details concerning shares of any class and series of stock authorized to be issued by a regulatory commission which have not yet been issued.
  4. The identification of each class of preferred stock should show the dividend rate and whether the dividends are cumulative or noncumulative.
  5. State in a footnote if any capital stock that has been nominally issued is nominally outstanding at end of year.
  6. Give particulars (details) in column (a) of any nominally issued capital stock, reacquired stock, or stock in sinking and other funds which is pledged, stating name of pledgee and purpose of pledge.
Line No.
Class and Series of Stock and Name of Stock Series
(a)
Number of Shares Authorized by Charter
(b)
Par or Stated Value per Share
(c)
Call Price at End of Year
(d)
Outstanding per Bal. Sheet (Total amount outstanding without reduction for amounts held by respondent) Shares
(e)
Outstanding per Bal. Sheet (Total amount outstanding without reduction for amounts held by respondent) Amount
(f)
Held by Respondent As Reacquired Stock (Acct 217) Shares
(g)
Held by Respondent As Reacquired Stock (Acct 217) Cost
(h)
Held by Respondent In Sinking and Other Funds Shares
(i)
Held by Respondent In Sinking and Other Funds Amount
(j)
1
Common Stock (Account 201)
2
Common Stock (NASDQ)
200,000,000
0.01
57,606,252
576,063
3,545,644
98,248,245.00
9
Total
200,000,000
57,606,252
576,063
10
Preferred Stock (Account 204)
11
Preferred Stock - None issued
50,000,000
0.01
14
Total
50,000,000
1
Capital Stock (Accounts 201 and 204) - Data Conversion
2
3
4
5
Total


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

2021-12-31
Year/Period of Report

End of:
2021
/
Q4
Other Paid-in Capital
1. Report below the balance at the end of the year and the information specified below for the respective other paid-in capital accounts. Provide a subheading for each account and show a total for the account, as well as a total of all accounts for reconciliation with the balance sheet, page 112. Explain changes made in any account during the year and give the accounting entries effecting such change.
  1. Donations Received from Stockholders (Account 208) - State amount and briefly explain the origin and purpose of each donation.
  2. Reduction in Par or Stated Value of Capital Stock (Account 209) - State amount and briefly explain the capital changes that gave rise to amounts reported under this caption including identification with the class and series of stock to which related.
  3. Gain or Resale or Cancellation of Reacquired Capital Stock (Account 210) - Report balance at beginning of year, credits, debits, and balance at end of year with a designation of the nature of each credit and debit identified by the class and series of stock to which related.
  4. Miscellaneous Paid-In Capital (Account 211) - Classify amounts included in this account according to captions that, together with brief explanations, disclose the general nature of the transactions that gave rise to the reported amounts.
Line No.
Item
(a)
Amount
(b)
1
DonationsReceivedFromStockholdersAbstract
Donations Received from Stockholders (Account 208)
2
DonationsReceivedFromStockholders
Beginning Balance Amount
3.1
IncreasesDecreasesFromSalesOfDonationsReceivedFromStockholders
Increases (Decreases) from Sales of Donations Received from Stockholders
4
DonationsReceivedFromStockholders
Ending Balance Amount
5
ReductionInParOrStatedValueOfCapitalStockAbstract
Reduction in Par or Stated Value of Capital Stock (Account 209)
6
ReductionInParOrStatedValueOfCapitalStock
Beginning Balance Amount
7.1
IncreasesDecreasesDueToReductionsInParOrStatedValueOfCapitalStock
Increases (Decreases) Due to Reductions in Par or Stated Value of Capital Stock
8
ReductionInParOrStatedValueOfCapitalStock
Ending Balance Amount
9
GainOrResaleOrCancellationOfReacquiredCapitalStockAbstract
Gain or Resale or Cancellation of Reacquired Capital Stock (Account 210)
10
GainOnResaleOrCancellationOfReacquiredCapitalStock
Beginning Balance Amount
11.1
IncreasesDecreasesFromGainOrResaleOrCancellationOfReacquiredCapitalStock
Increases (Decreases) from Gain or Resale or Cancellation of Reacquired Capital Stock
12
GainOnResaleOrCancellationOfReacquiredCapitalStock
Ending Balance Amount
13
MiscellaneousPaidInCapitalAbstract
Miscellaneous Paid-In Capital (Account 211)
14
MiscellaneousPaidInCapital
Beginning Balance Amount
1,513,785,478
15.1
IncreasesDecreasesDueToMiscellaneousPaidInCapital
Increases (Decreases) Due to Miscellaneous Paid-In Capital
202,441,517
16
MiscellaneousPaidInCapital
Ending Balance Amount
1,716,226,995
17
OtherPaidInCapitalAbstract
Historical Data - Other Paid in Capital
18
OtherPaidInCapitalDetail
Beginning Balance Amount
19.1
IncreasesDecreasesInOtherPaidInCapital
Increases (Decreases) in Other Paid-In Capital
20
OtherPaidInCapitalDetail
Ending Balance Amount
40
OtherPaidInCapital
Total
1,716,226,995


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
CAPITAL STOCK EXPENSE (Account 214)
  1. Report the balance at end of the year of discount on capital stock for each class and series of capital stock.
  2. If any change occurred during the year in the balance in respect to any class or series of stock, attach a statement giving particulars (details) of the change. State the reason for any charge-off of capital stock expense and specify the account charged.
Line No.
NameOfClassAndSeriesOfStock
Class and Series of Stock
(a)
CapitalStockExpense
Balance at End of Year
(b)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
TOTAL


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
LONG-TERM DEBT (Account 221, 222, 223 and 224)
  1. Report by Balance Sheet Account the details concerning long-term debt included in Accounts 221, Bonds, 222, Reacquired Bonds, 223, Advances from Associated Companies, and 224, Other Long-Term Debt.
  2. For bonds assumed by the respondent, include in column (a) the name of the issuing company as well as a description of the bonds, and in column (b) include the related account number.
  3. For Advances from Associated Companies, report separately advances on notes and advances on open accounts. Designate demand notes as such. Include in column (a) names of associated companies from which advances were received, and in column (b) include the related account number.
  4. For receivers' certificates, show in column (a) the name of the court and date of court order under which such certificates were issued, and in column (b) include the related account number.
  5. In a supplemental statement, give explanatory details for Accounts 223 and 224 of net changes during the year. With respect to long-term advances, show for each company: (a)principal advanced during year (b) interest added to principal amount, and (c) principal repaid during year. Give Commission authorization numbers and dates.
  6. If the respondent has pledged any of its long-term debt securities, give particulars (details) in a footnote, including name of the pledgee and purpose of the pledge.
  7. If the respondent has any long-term securities that have been nominally issued and are nominally outstanding at end of year, describe such securities in a footnote.
  8. If interest expense was incurred during the year on any obligations retired or reacquired before end of year, include such interest expense in column (m). Explain in a footnote any difference between the total of column (m) and the total Account 427, Interest on Long-Term Debt and Account 430, Interest on Debt to Associated Companies.
  9. Give details concerning any long-term debt authorized by a regulatory commission but not yet issued.
Line No.
ClassAndSeriesOfObligationCouponRateDescription
Class and Series of Obligation, Coupon Rate (For new issue, give commission Authorization numbers and dates)
(a)
RelatedAccountNumber
Related Account Number
(b)
Principal Amount of Debt Issued
(c)
LongTermDebtIssuanceExpensePremiumOrDiscount
Total Expense, Premium or Discount
(d)
LongTermDebtIssuanceExpenses
Total Expense
(e)
LongTermDebtPremium
Total Premium
(f)
LongTermDebtDiscount
Total Discount
(g)
NominalDateOfIssue
Nominal Date of Issue
(h)
DateOfMaturity
Date of Maturity
(i)
AmortizationPeriodStartDate
AMORTIZATION PERIOD Date From
(j)
AmortizationPeriodEndDate
AMORTIZATION PERIOD Date To
(k)
Outstanding (Total amount outstanding without reduction for amounts held by respondent)
(l)
Interest for Year Amount
(m)
1
Bonds (Account 221)
2
First Mortgage Bonds 5.71% (Montana)
(a)
55,000,000
549,881
10/15/2009
10/15/2039
10/15/2009
10/15/2039
55,000,000
3,140,500
3
First Mortgage Bonds 5.010% (Montana)
161,000,000
909,702
4,730,180
05/27/2010
05/01/2025
05/27/2010
05/01/2025
161,000,000
8,066,100
4
First Mortgage Bonds 4.15% (Montana)
60,000,000
376,671
08/10/2012
08/10/2042
08/10/2012
08/10/2042
60,000,000
2,490,000
5
First Mortgage Bonds 4.30% (Montana)
40,000,000
251,114
08/10/2012
08/10/2052
08/10/2012
08/10/2052
40,000,000
1,720,000
6
First Mortgage Bonds 4.85% (Montana)
15,000,000
70,047
12/19/2013
12/19/2043
12/19/2013
12/19/2043
15,000,000
727,500
7
First Mortgage Bonds 3.99% (Montana)
35,000,000
163,444
12/19/2013
12/19/2028
12/19/2013
12/19/2028
35,000,000
1,396,500
8
First Mortgage Bonds 4.176% (Montana)
450,000,000
4,927,101
11/14/2014
11/15/2044
11/14/2014
11/15/2044
450,000,000
18,792,000
9
First Mortgage Bonds 3.11% (Montana)
75,000,000
4,137,235
06/23/2015
07/01/2025
07/01/2015
07/01/2025
75,000,000
2,332,500
10
First Mortgage Bonds 4.11% (Montana)
125,000,000
6,895,391
06/23/2015
07/01/2045
07/01/2015
07/01/2045
125,000,000
5,137,500
11
First Mortgage Bonds 4.03% (Montana)
250,000,000
17,138,156
11/06/2017
11/06/2047
11/06/2017
11/06/2047
250,000,000
10,075,000
12
First Mortgage Bonds 3.98% (Montana) A
50,000,000
322,669
06/26/2019
06/26/2049
06/26/2019
06/26/2049
50,000,000
1,990,000
13
First Mortgage Bonds 3.98% (Montana) B
100,000,000
645,339
09/17/2019
09/17/2049
09/17/2019
09/17/2049
100,000,000
3,980,000
14
First Mortgage Bonds 3.21% (Montana)
100,000,000
422,199
05/15/2020
05/15/2030
05/15/2020
05/15/2030
100,000,000
3,210,000
15
First Mortgage Bonds 1.00% (Montana)
100,000,000
557,601
03/26/2021
03/26/2024
03/26/2021
03/26/2024
100,000,000
763,699
16
Pollution Control Revenue Bonds - 2.00% Series, City of Forsyth (Montana)
144,660,000
1,590,316
08/11/2016
08/01/2023
08/01/2016
08/01/2023
144,660,000
2,893,200
17
First Mortgage Bonds 5.01% (South Dakota)
64,000,000
412,254
1,880,320
05/27/2010
05/01/2025
05/27/2010
05/01/2025
64,000,000
3,206,400
18
First Mortgage Bonds 4.15% (South Dakota)
30,000,000
184,030
08/10/2012
08/10/2042
08/10/2012
08/10/2042
30,000,000
1,245,000
19
First Mortgage Bonds 4.30% (South Dakota)
20,000,000
122,686
08/10/2012
08/10/2052
08/10/2012
08/10/2052
20,000,000
860,000
20
First Mortgage Bonds 4.85% (South Dakota)
50,000,000
278,988
12/19/2013
12/19/2043
12/19/2013
12/19/2043
50,000,000
2,425,000
21
First Mortgage Bonds 4.22% (South Dakota)
30,000,000
207,702
12/19/2014
12/19/2044
12/19/2014
12/19/2044
30,000,000
1,266,000
22
First Mortgage Bonds 4.26% (South Dakota)
70,000,000
314,529
09/29/2015
09/29/2040
09/29/2015
09/29/2040
70,000,000
2,982,000
23
First Mortgage Bonds 2.80% (South Dakota)
60,000,000
377,548
4,928,484
06/15/2016
06/15/2026
06/15/2016
06/15/2026
60,000,000
1,680,000
24
First Mortgage Bonds 2.66% (South Dakota)
45,000,000
250,872
09/30/2016
09/30/2026
09/30/2016
09/30/2026
45,000,000
1,197,000
25
First Mortgage Bonds 3.21% (South Dakota)
50,000,000
352,905
05/15/2020
05/15/2030
05/15/2020
05/15/2030
50,000,000
1,605,000
26
Subtotal
2,179,660,000
41,458,380
11,538,984
2,179,660,000
83,180,899
27
Reacquired Bonds (Account 222)
28
29
30
31
Subtotal
32
Advances from Associated Companies (Account 223)
33
34
35
36
Subtotal
37
Other Long Term Debt (Account 224)
38
New Market Tax Credit Note Payable 1.146 %
26,976,900
1,000,148
07/01/2014
07/01/2046
07/01/2014
07/01/2046
39
Senior Unsecured Revolving Line of Credit ($425m)
425,000,000
09/02/2020
09/02/2023
09/02/2020
09/02/2023
373,000,000
3,841,641
40
Senior Unsecured Revolving Line of Credit ($25m)
25,000,000
03/27/2018
03/27/2022
03/27/2018
03/27/2022
3,032
41
Capital Leases (miscellaneous)
366
42
Interest Rate Hedge Amortizations
613,744
43
Community Development
72,139
44
Subtotal
476,976,900
1,000,148
373,000,000
4,530,922
33 TOTAL
2,656,636,900
2,552,660,000
87,711,821


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: BondsPrincipalAmountIssued
As issuances are redeemed, the related expense and premium or discount, as applicable, is charged to Loss on Reacquired Debt.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
RECONCILIATION OF REPORTED NET INCOME WITH TAXABLE INCOME FOR FEDERAL INCOME TAXES
  1. Report the reconciliation of reported net income for the year with taxable income used in computing Federal income tax accruals and show computation of such tax accruals. Include in the reconciliation, as far as practicable, the same detail as furnished on Schedule M-1 of the tax return for the year. Submit a reconciliation even though there is no taxable income for the year. Indicate clearly the nature of each reconciling amount.
  2. If the utility is a member of a group which files a consolidated Federal tax return, reconcile reported net income with taxable net income as if a separate return were to be field, indicating, however, intercompany amounts to be eliminated in such a consolidated return. State names of group member, tax assigned to each group member, and basis of allocation, assignment, or sharing of the consolidated tax among the group members.
  3. A substitute page, designed to meet a particular need of a company, may be used as Long as the data is consistent and meets the requirements of the above instructions. For electronic reporting purposes complete Line 27 and provide the substitute Page in the context of a footnote.
Line No.
Particulars (Details)
(a)
Amount
(b)
1
Net Income for the Year (Page 117)
186,839,752
2
Reconciling Items for the Year
3
4
Taxable Income Not Reported on Books
5
Equity Earnings of Subsidiaries
849,309
9
Deductions Recorded on Books Not Deducted for Return
10
Meals and Entertainment
73,740
11
Non-Deductible Dues/Lobbying Expense/Penalties/Professional Fees
1,645,115
12
Life Insurance/Reserves and Other Misc. Charges
9,412
13
Federal Income Taxes/State Tax Adjustment
379,587
14
Income Recorded on Books Not Included in Return
15
16
17
18
19
Deductions on Return Not Charged Against Book Income
20
Net Tax Greater Than Book Depreciation
57,729,732
21
Amortization of Intangibles
159,118
22
Plant Flow Through Items
112,960,908
23
Reserves & Accruals
98,322,612
24
Deferred Book Revenue & Gains
29,290,307
25
Contributions & Advances for Construction
17,596,377
26
NOL Carryforward/Other Miscellaneous
79,430,886
27
Federal Tax Net Income
2,780,633
28
Show Computation of Tax:
29
Federal Tax Expense/(Benefit) @ 21%
583,933


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
TAXES ACCRUED, PREPAID AND CHARGES DURING YEAR
  1. Give particulars (details) of the combined prepaid and accrued tax accounts and show the total taxes charged to operations and other accounts during the year. Do not include gasoline and other sales taxes which have been charged to the accounts to which the taxed material was charged. If the actual, or estimated amounts of such taxes are known, show the amounts in a footnote and designate whether estimated or actual amounts.
  2. Include on this page, taxes paid during the year and charged direct to final accounts, (not charged to prepaid or accrued taxes.) Enter the amounts in both columns (g) and (h). The balancing of this page is not affected by the inclusion of these taxes.
  3. Include in column (g) taxes charged during the year, taxes charged to operations and other accounts through (a) accruals credited to taxes accrued, (b)amounts credited to proportions of prepaid taxes chargeable to current year, and (c) taxes paid and charged direct to operations or accounts other than accrued and prepaid tax accounts.
  4. List the aggregate of each kind of tax in such manner that the total tax for each State and subdivision can readily be ascertained.
  5. If any tax (exclude Federal and State income taxes) covers more than one year, show the required information separately for each tax year, identifying the year in column (d).
  6. Enter all adjustments of the accrued and prepaid tax accounts in column (i) and explain each adjustment in a foot- note. Designate debit adjustments by parentheses.
  7. Do not include on this page entries with respect to deferred income taxes or taxes collected through payroll deductions or otherwise pending transmittal of such taxes to the taxing authority.
  8. Report in columns (l) through (o) how the taxes were distributed. Report in column (o) only the amounts charged to Accounts 408.1 and 409.1 pertaining to electric operations. Report in column (l) the amounts charged to Accounts 408.1 and 409.1 pertaining to other utility departments and amounts charged to Accounts 408.2 and 409.2. Also shown in column (o) the taxes charged to utility plant or other balance sheet accounts.
  9. For any tax apportioned to more than one utility department or account, state in a footnote the basis (necessity) of apportioning such tax.
BALANCE AT BEGINNING OF YEAR BALANCE AT END OF YEAR DISTRIBUTION OF TAXES CHARGED
Line No.
DescriptionOfTaxesAccruedPrepaidAndCharged
Kind of Tax (See Instruction 5)
(a)
TypeOfTax
Type of Tax
(b)
TaxJurisdiction
State
(c)
TaxYear
Tax Year
(d)
TaxesAccrued
Taxes Accrued (Account 236)
(e)
PrepaidTaxes
Prepaid Taxes (Include in Account 165)
(f)
TaxesCharged
Taxes Charged During Year
(g)
TaxesPaid
Taxes Paid During Year
(h)
TaxAdjustments
Adjustments
(i)
TaxesAccrued
Taxes Accrued (Account 236)
(j)
PrepaidTaxes
Prepaid Taxes (Included in Account 165)
(k)
TaxesAccruedPrepaidAndCharged
Electric (Account 408.1, 409.1)
(l)
IncomeTaxesExtraordinaryItems
Extraordinary Items (Account 409.3)
(m)
AdjustmentsToRetainedEarnings
Adjustment to Ret. Earnings (Account 439)
(n)
TaxesIncurredOther
Other
(o)
1
FICA and Medicare
Federal Tax
Montana
2021
0
0
9,344,784
9,344,791
7
4,809,427
4,535,357
2
FICA and Medicare
Federal Tax
South Dakota
2021
0
0
2,125,030
2,125,030
0
815,651
1,309,379
3
Subtotal Federal Tax
0
0
11,469,814
11,469,821
0
7
0
5,625,078
0
0
5,844,736
4
State Income Tax
State Tax
Montana
2021
6,545,035
0
5,782,210
2,500,000
10,932,885
20,760,130
3,660,430
2,121,780
5
State Income Tax
State Tax
South Dakota/Nebraska
2021
6,569,042
0
3,522,322
0
12,553,277
22,644,641
3,522,322
6
Subtotal State Tax
24,007
0
2,259,888
2,500,000
1,620,392
1,884,511
0
3,660,430
0
0
1,400,542
7
City License Tax
Local Tax
Montana
2021
0
0
2,007
2,007
0
1,680
327
8
Subtotal Local Tax
0
0
2,007
2,007
0
0
0
1,680
0
0
327
9
Hydro Invasive Species Tax
Other Taxes
Montana
2020
230,409
0
230,409
0
10
Hydro Invasive Species Tax
Other Taxes
Montana
2021
0
0
817,319
639,068
178,251
817,319
11
Heavy Highway Tax
Other Taxes
Montana
2021
0
0
27,150
27,150
0
14,596
12,554
12
Heavy Highway Tax
Other Taxes
South Dakota
2021
0
0
4,006
4,006
0
2,364
1,642
13
Personal Property - Auto
Other Taxes
Montana
2021
0
0
318,685
318,685
0
209,169
109,516
14
Personal Property - Auto
Other Taxes
South Dakota
2021
0
0
168,367
168,367
0
93,474
74,893
15
WET Tax
Other Taxes
Montana
2020
419,354
0
419,354
0
16
WET Tax
Other Taxes
Montana
2021
0
0
1,684,603
1,258,510
426,093
1,372,494
312,109
17
EELT Tax
Other Taxes
Montana
2020
185,283
0
185,283
0
18
EELT Tax
Other Taxes
Montana
2021
0
0
802,263
600,004
202,259
802,263
19
Consumer Counsel
Other Taxes
Montana
2020
107,220
0
107,220
0
20
Consumer Counsel
Other Taxes
Montana
2021
0
0
506,658
348,277
158,381
383,542
123,116
21
Montana Public Service Commission
Other Taxes
Montana
2020
774,374
0
774,374
0
22
Montana Public Service Commission
Other Taxes
Montana
2021
0
0
3,019,479
2,515,039
504,440
1,484,780
1,534,699
23
Gross Receipts Tax
Other Taxes
South Dakota
2020
328,572
0
328,572
0
24
Gross Receipts Tax
Other Taxes
South Dakota
2021
0
0
344,403
344,403
265,901
78,502
25
Coal Conversion Tax
Other Taxes
North Dakota
2021
0
0
128,428
128,428
0
128,428
26
Subtotal Other Tax
2,045,212
0
7,821,361
8,052,746
0
1,813,827
0
5,574,330
0
0
2,247,031
27
Property Tax
Property Tax
Montana
2020
82,835,340
0
5
82,835,345
0
5
28
Property Tax
Property Tax
Montana
2021
0
0
158,633,601
79,366,961
79,266,640
124,421,568
34,212,033
29
Property Tax - Crow Tribe
Property Tax
Montana
2020
209,784
0
209,784
30
Property Tax - Crow Tribe
Property Tax
Montana
2021
0
0
209,784
209,784
84,948
124,836
31
Property Tax - Blackfoot
Property Tax
Montana
2021
0
0
356,455
356,455
0
356,455
32
Property Tax
Property Tax
South Dakota
2020
5,301,229
0
48,510
5,349,739
0
27,651
20,859
33
Property Tax
Property Tax
South Dakota
2021
0
0
5,487,115
5,487,115
4,829,900
657,215
34
Property Tax
Property Tax
Nebraska
2020
676,891
0
1,660
678,551
0
1,660
35
Property Tax
Property Tax
Nebraska
2021
0
0
667,431
667,431
667,431
36
Property Tax
Property Tax
North Dakota
2020
16,931
0
799
17,730
0
799
37
Property Tax
Property Tax
North Dakota
2021
0
0
16,591
16,591
16,591
38
Property Tax
Property Tax
Iowa
2020
96,336
0
12
96,324
0
12
39
Property Tax
Property Tax
Iowa
2021
0
0
78,732
40,017
38,715
78,732
40
Subtotal Property Tax
89,136,511
0
165,500,671
168,741,122
0
85,896,060
0
129,460,182
0
0
36,040,489
41
0
0
0
42
Subtotal Real Estate Tax
0
0
0
0
0
0
0
0
0
0
0
43
Federal Unemplyment Tax
Unemployment Tax
Montana
2020
990
0
990
0
44
Federal Unemplyment Tax
Unemployment Tax
Montana
2021
0
0
59,827
57,994
1,833
31,314
28,513
45
Federal Unemplyment Tax
Unemployment Tax
South Dakota
2020
216
0
398
182
0
398
46
Federal Unemplyment Tax
Unemployment Tax
South Dakota
2021
0
0
13,950
14,073
123
7,062
6,888
47
State Unemployment Tax
Unemployment Tax
Montana
2020
10,705
0
10,705
0
48
State Unemployment Tax
Unemployment Tax
Montana
2021
0
0
288,465
277,827
10,638
262,873
25,592
49
State Unemployment Tax
Unemployment Tax
South Dakota
2020
107
107
0
50
State Unemployment Tax
Unemployment Tax
South Dakota
2021
0
0
13,671
13,436
235
3,531
10,140
51
Subtotal Unemployment Tax
11,586
0
376,311
375,314
0
12,583
0
304,780
0
0
71,531
52
Use Tax
Sales And Use Tax
Wyoming
2021
0
0
3,153
3,153
0
3,153
53
Use Tax
Sales And Use Tax
South Dakota
2020
83,053
0
83,053
0
54
Use Tax
Sales And Use Tax
South Dakota
2021
0
0
821,895
756,007
65,888
821,895
55
Subtotal Sales And Use Tax
83,053
0
818,742
835,907
0
65,888
0
0
0
0
818,742
56
Federal Income Tax
Income Tax
Montana
2021
6,745,667
0
11,571,838
150,000
31,717,591
36,393,762
5,499,699
6,072,139
57
Federal Income Tax
Income Tax
South Dakota/Nebraska
2021
21,763
0
11,271,314
80,000
31,479,139
42,808,690
7,700,008
3,571,306
58
Subtotal Income Tax
6,723,904
0
300,524
230,000
238,452
6,414,928
0
2,200,309
0
0
2,500,833
59
Subtotal Excise Tax
0
0
0
0
0
0
0
0
0
0
0
60
Subtotal Fuel Tax
0
0
0
0
0
0
0
0
0
0
0
61
Subtotal Federal Insurance Tax
0
0
0
0
0
0
0
0
0
0
0
62
Delaware Franchise Tax
Franchise Tax
Montana
2021
0
0
205,218
205,218
0
150,054
55,164
63
Delaware Franchise Tax
Franchise Tax
South Dakota
2021
0
0
27,530
27,530
0
27,510
20
64
Subtotal Franchise Tax
0
0
232,748
232,748
0
0
0
177,564
0
0
55,184
65
TOTAL
0
0
0
66
Subtotal Miscellaneous Other Tax
0
0
0
0
0
0
0
0
0
0
0
67
Subtotal Other Federal Tax
0
0
0
0
0
0
0
0
0
0
0
68
Subtotal Other State Tax
0
0
0
0
0
0
0
0
0
0
0
69
Subtotal Other Property Tax
0
0
0
0
0
0
0
0
0
0
0
70
Subtotal Other Use Tax
0
0
0
0
0
0
0
0
0
0
0
71
Subtotal Other Advalorem Tax
0
0
0
0
0
0
0
0
0
0
0
72
Subtotal Other License And Fees Tax
0
0
0
0
0
0
0
0
0
0
0
73
Subtotal Payroll Tax
0
0
0
0
0
0
0
0
0
0
0
74
Subtotal Advalorem Tax
0
0
0
0
0
0
0
0
0
0
0
75
Subtotal Other Allocated Tax
0
0
0
0
0
0
0
0
0
0
0
76
Subtotal Severance Tax
0
0
0
0
0
0
0
0
0
0
0
77
Subtotal Penalty Tax
0
0
0
0
0
0
0
0
0
0
0
78
Subtotal Other Taxes And Fees
0
0
0
0
0
0
0
0
0
0
0
40
TOTAL
84,528,451
0
188,782,066
192,439,665
1,381,940
(a)
79,488,912
0
(b)(c)
142,603,735
0
0
46,178,331


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: TaxesAccrued
Montana Operations unfunded reserves for Taxes Accrued (236) are $79,266,640 and $82,835,340 for 2021 and 2020, respectively.
(b) Concept: TaxesAccruedPrepaidAndCharged
Montana Electric - taxes accrued, exclusive of federal and state income taxes
Taxes Charged During
the Year 2021
(b) (c)
Payroll Tax - FICA 3,882,533 
Payroll Tax - Medicare 926,895 
Payroll Tax - FUTA 31,314 
Highway Vehicle Use Tax - MT 14,596 
Payroll Tax - SUTA - MT 262,873 
Real & Personal Property - Transmission 32,571,532 
Real & Personal Property - Production 26,096,216 
Real & Personal Property - Distribution 66,047,939 
City License Tax - MT 1,680 
WET - Montana 1,372,494 
EELT - Montana 802,262 
Invasive Species Tax - MT 817,319 
Cons Council Tax - MT 383,542 
MPSC - Montana 1,484,780 
Delaware Franchise 150,054 
134,846,029 
(c) Concept: TaxesAccruedPrepaidAndCharged
South Dakota Electric - taxes accrued, exclusive of federal and state income taxes
Taxes Charged During the
Year 2021
(b) (c)
Property - South Dakota $ 4,857,551 
Property - North Dakota 17,390 
Property - Iowa 78,720 
Highway Vehicle Use Tax - SD 2,365 
Coal Conversion Facility - N Dakota 128,429 
Gross Revenue - South Dakota 265,901 
Delaware Franchise 27,510 
Vehicle - South Dakota 93,474 
Payroll Tax - FICA 644,988 
Payroll Tax - Medicare 170,663 
Payroll Tax - FUTA 7,061 
Payroll Tax - SUTA - SD 6,531 
$ 6,300,583 

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ACCUMULATED DEFERRED INVESTMENT TAX CREDITS (Account 255)

Report below information applicable to Account 255. Where appropriate, segregate the balances and transactions by utility and nonutility operations. Explain by footnote any correction adjustments to the account balance shown in column (g). Include in column (i) the average period over which the tax credits are amortized.

Deferred for Year Allocations to Current Year's Income
Line No.
Account Subdivisions
(a)
Balance at Beginning of Year
(b)
Account No.
(c)
Amount
(d)
Account No.
(e)
Amount
(f)
Adjustments
(g)
Balance at End of Year
(h)
Average Period of Allocation to Income
(i)
ADJUSTMENT EXPLANATION
(j)
1
Electric Utility
2
3%
3
4%
4
7%
5
10%
315
276
39
33 Years
8
TOTAL Electric (Enter Total of lines 2 thru 7)
315
276
39
9
Other (List separately and show 3%, 4%, 7%, 10% and TOTAL)
10
`
11
Other - 30
278,359
(a)
239,570
517,929
5 years
12
OTHER TOTAL
278,359
239,570
517,929
13
Account 255 balance
278,674
239,294
517,968
47 OTHER TOTAL
48 GRAND TOTAL
278,674
517,968


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: AccumulatedDeferredInvestmentTaxCreditsAllocationToIncomeAmount
The other 30% amount disclosed on Page 266 is comprised of the following amounts:
129,483  Amortization
(369,053) New Credits
(239,570) Allocation to Current Year's Income

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
OTHER DEFERRED CREDITS (Account 253)
  1. Report below the particulars (details) called for concerning other deferred credits.
  2. For any deferred credit being amortized, show the period of amortization.
  3. Minor items (5% of the Balance End of Year for Account 253 or amounts less than $100,000, whichever is greater) may be grouped by classes.
DEBITS
Line No.
Description and Other Deferred Credits
(a)
Balance at Beginning of Year
(b)
Contra Account
(c)
Amount
(d)
Credits
(e)
Balance at End of Year
(f)
1
Montana Operations:
2
Pension Plan Requirement (Montana)
128,324,413
66,594,004
26,670,092
88,400,501
3
Projects & Studies Prepaid by Customers (Montana)
15,931,698
2,227,416
15,439,905
29,144,187
4
Other Minor Items (9) - some are amortized over various periods  (Montana)
8,946,282
5,242,813
5,020,156
8,723,625
5
South Dakota Operations:
6
Family Protector Plan Future Payments (South Dakota)
821,469
219,983
601,486
7
Projects & Studies Prepaid by Customer (South Dakota)
83,728
97,734
124,845
110,839
8
Deferred Directors' Compensation (South Dakota)
27,034,509
19,542,862
10,742,747
18,234,394
9
Other Minor Items (4) - some are amortized over various periods (South Dakota)
2,064,894
1,397,516
1,937,124
2,604,502
10
Corporate:
11
Minor Item (Corporate)
1,549,717
485,589
2,035,306
12
Permanent Uncertain Tax Positions (Corporate)
14,888,449
18,506,009
26,888,350
23,270,790
47
TOTAL
199,645,159
113,828,337
87,308,808
173,125,630


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report


End of:
2021
/
Q4
ACCUMULATED DEFERRED INCOME TAXES - ACCELERATED AMORTIZATION PROPERTY (Account 281)
  1. Report the information called for below concerning the respondent’s accounting for deferred income taxes rating to amortizable property.
  2. For other (Specify),include deferrals relating to other income and deductions.
  3. Use footnotes as required.
CHANGES DURING YEAR ADJUSTMENTS
Debits Credits
Line No.
Account
(a)
Balance at Beginning of Year
(b)
Amounts Debited to Account 410.1
(c)
Amounts Credited to Account 411.1
(d)
Amounts Debited to Account 410.2
(e)
Amounts Credited to Account 411.2
(f)
Account Credited
(g)
Amount
(h)
Account Debited
(i)
Amount
(j)
Balance at End of Year
(k)
1
Accelerated Amortization (Account 281)
2
Electric
3
Defense Facilities
4
Pollution Control Facilities
5
Other
5.1
Other (provide details in footnote):
8
TOTAL Electric (Enter Total of lines 3 thru 7)
9
Gas
10
Defense Facilities
11
Pollution Control Facilities
12
Other
12.1
Other (provide details in footnote):
15
TOTAL Gas (Enter Total of lines 10 thru 14)
16
Other
16.1
Other
16.2
Other
17
TOTAL (Acct 281) (Total of 8, 15 and 16)
18
Classification of TOTAL
19
Federal Income Tax
20
State Income Tax
21
Local Income Tax


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ACCUMULATED DEFERRED INCOME TAXES - OTHER PROPERTY (Account 282)
  1. Report the information called for below concerning the respondent’s accounting for deferred income taxes rating to property not subject to accelerated amortization.
  2. For other (Specify),include deferrals relating to other income and deductions.
  3. Use footnotes as required.
CHANGES DURING YEAR ADJUSTMENTS
Debits Credits
Line No.
Account
(a)
Balance at Beginning of Year
(b)
Amounts Debited to Account 410.1
(c)
Amounts Credited to Account 411.1
(d)
Amounts Debited to Account 410.2
(e)
Amounts Credited to Account 411.2
(f)
Account Credited
(g)
Amount
(h)
Account Debited
(i)
Amount
(j)
Balance at End of Year
(k)
1 Account 282
2
Electric
(a)
364,970,203
16,006,411
380,976,614
3
Gas
69,247,928
90,321
1,661,312
67,676,937
4
Other (Specify)
17,320,467
12,070
17,308,397
5
Total (Total of lines 2 thru 4)
416,897,664
16,108,802
1,661,312
431,345,154
6
7
8
9
TOTAL Account 282 (Total of Lines 5 thru 8)
416,897,664
16,108,802
1,661,312
431,345,154
10
Classification of TOTAL
11
Federal Income Tax
416,897,664
16,108,802
1,661,312
431,345,154
12
State Income Tax
13
Local Income Tax


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: AccumulatedDeferredIncomeTaxesOtherProperty
Line No Account Balance at Beg
of Year
Amounts
Debited to
Account 410.1
Amounts
Credited to
Account 411.1
Balance at End
of Year
(a) (b) (c) (d) (k)
MONTANA
1 Account 282
2 Electric 304,314,093  14,348,401  —  318,662,494 
3 Gas 60,833,048  —  (1,661,312) 59,171,736 
4 Other (17,320,467) 12,071  —  (17,308,396)
5 Total 347,826,674  14,360,472  (1,661,312) 360,525,834 
6
7
8
9 Total 347,826,674  14,360,472  (1,661,312) 360,525,834 
10 Classification Total
11 Federal Income Tax 347,826,674  14,360,472  (1,661,312) 360,525,834 
12 State Income Tax
13 Local Income Tax
SOUTH DAKOTA
1 Account 282
2 Electric 60,656,109  1,658,010  —  62,314,119 
3 Gas 8,414,880  90,321  —  8,505,201 
4 Other —  —  —  — 
5 Total 69,070,989  1,748,331  —  70,819,320 
6
7
8
9 Total 69,070,989  1,748,331  —  70,819,320 
10 Classification Total
11 Federal Income Tax 69,070,989  1,748,331  —  70,819,320 
12 State Income Tax
13 Local Income Tax

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ACCUMULATED DEFERRED INCOME TAXES - OTHER (Account 283)
  1. Report the information called for below concerning the respondent's accounting for deferred income taxes relating to amounts recorded in Account 283.
  2. For other (Specify),include deferrals relating to other income and deductions.
  3. Provide in the space below explanations for Page 276. Include amounts relating to insignificant items listed under Other.
  4. Use footnotes as required.
CHANGES DURING YEAR ADJUSTMENTS
Debits Credits
Line No.
Account
(a)
Balance at Beginning of Year
(b)
Amounts Debited to Account 410.1
(c)
Amounts Credited to Account 411.1
(d)
Amounts Debited to Account 410.2
(e)
Amounts Credited to Account 411.2
(f)
Account Credited
(g)
Amount
(h)
Account Debited
(i)
Amount
(j)
Balance at End of Year
(k)
1 Account 283
2
Electric
3
Regulatory Assets
(a)
35,989,472
3,235,753
2,097,683
37,127,542
4
Excess Tax Depreciation
65,778,763
9,435,241
75,214,004
9 TOTAL Electric (Total of lines 3 thru 8)
101,768,235
3,235,753
2,097,683
9,435,241
112,341,546
10
Gas
11
Regulatory Assets
17,180,821
1,972,165
2,902,848
16,250,138
12
Excess Tax Depreciation
15,159,716
2,128,341
17,288,057
17 TOTAL Gas (Total of lines 11 thru 16)
32,340,537
1,972,165
2,902,848
2,128,341
33,538,195
18 TOTAL Other
91,647,257
41,900
91,689,157
19 TOTAL (Acct 283) (Enter Total of lines 9, 17 and 18)
225,756,029
5,207,918
5,000,531
11,605,482
237,568,898
20
Classification of TOTAL
21
Federal Income Tax
201,858,921
5,207,918
4,443,505
10,474,076
213,097,410
22
State Income Tax
23,897,108
557,026
1,131,405
24,471,487
23
Local Income Tax
NOTES


FOOTNOTE DATA

(a) Concept: AccumulatedDeferredIncomeTaxesOther
MONTANA
Line No Account
(a)
Balance at Beg of Year
(b)
Amounts Debited to
Acct 410.1
(c)
Accounts Credited to Acct 411.1
(d)
Amounts Debited to Acct 410.2 (e) Amounts Credit to Acct 411.2 (f) Balance at
End of Year
(k)
1 Account 283
2 Electric:
4 Regulatory Assets 35,601,802  —  2,097,683  —  —  33,504,119 
10 Excess Tax Depreciation 59,666,451  —  —  8,238,609  —  67,905,060 
14 Total Electric 95,268,253  —  2,097,683  8,238,609  —  101,409,179 
16 Gas:
18 Regulatory Assets 13,919,912  —  2,902,848  —  —  11,017,064 
24 Excess Tax Depreciation 13,693,884  —  —  1,876,347  —  15,570,231 
27 Total Gas 27,613,796  —  2,902,848  1,876,347  —  26,587,295 
29 Other, Net 91,647,257  —  —  41,901  —  91,689,158 
31 Total (Acct 283) (Lines
9,17 & 18)
214,529,306  —  5,000,531  10,156,857  —  219,685,632 
33 Classification of Total
34 Federal Income Tax 190,632,198  —  4,443,506  9,025,451  —  195,214,143 
35 State Income Tax 23,897,108  —  557,025  1,131,405  —  24,471,488 
36 Local Income Tax
37 214,529,306  —  5,000,531  10,156,856  —  219,685,631 
SOUTH DAKOTA
1 Account 283
2 Electric:
4 Regulatory Assets 387,670  3,235,754  —  —  —  3,623,424 
10 Excess Tax Depreciation 6,112,312  —  —  1,196,632  —  7,308,944 
14 Total Electric 6,499,982  3,235,754  —  1,196,632  —  10,932,368 
16 Gas:
18 Regulatory Assets 3,260,909  1,972,164  —  —  —  5,233,073 
24 Excess Tax Depreciation 1,465,832  —  —  251,993  —  1,717,825 
27 Total Gas 4,726,741  1,972,164  —  251,993  —  6,950,898 
— 
29 Other, Net —  —  —  —  —  — 
31 Total (Acct 283) (Lines
9,17 & 18)
11,226,723  5,207,918  —  1,448,625  —  17,883,266 
33 Classification of Total
34 Federal Income Tax 11,226,723  5,207,918  —  1,448,625  —  17,883,266 
35 State Income Tax
36 Local Income Tax
37 11,226,723  5,207,918  —  1,448,625  —  17,883,266 

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
OTHER REGULATORY LIABILITIES (Account 254)
  1. Report below the particulars (details) called for concerning other regulatory liabilities, including rate order docket number, if applicable.
  2. Minor items (5% of the Balance in Account 254 at end of period, or amounts less than $100,000 which ever is less), may be grouped by classes.
  3. For Regulatory Liabilities being amortized, show period of amortization.
DEBITS
Line No.
Description and Purpose of Other Regulatory Liabilities
(a)
Balance at Beginning of Current Quarter/Year
(b)
Account Credited
(c)
Amount
(d)
Credits
(e)
Balance at End of Current Quarter/Year
(f)
1
Excess Deferred Income Taxes (Montana)
142,969,218
7,023,736
1,082,252
(a)
137,027,734
2
Deferred Gas Storage Sales (Montana) - Docket D2001.1.1; Amortization 2001 - 2039
7,886,977
420,516
7,466,461
3
Montana Public Service Commission Consumer Counsel Taxes (Montana) - Dockets 2017.9.78 and 2018.10.67
1,582,694
85,058
196,430
1,694,066
4
CTC QF Over/Under Collections (Montana) - Docket 97.9.90 and Docket 2001.1.15; Annual Amortization
593,865
623,242
29,377
5
Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization
571,311
571,311
6
Natural Gas Regulatory Deferrals (Montana)
225,967
495,011
269,044
7
Excess Deferred Income Taxes (South Dakota)
22,309,868
1,290,337
(b)
21,019,531
8
Current Ad Valorem True-Up (South Dakota) - Docket GE98-001
200,002
466,537
752,663
486,128
9
Aberdeen Manufactured Gas Plant (South Dakota) - Docket NG 11-003
656,301
488,768
340,590
508,123
10
Tax Cut Jobs Act Deferral (South Dakota) - Docket NG-0095 and GE17-003
155,000
155,000
11
Unbilled Revenues (South Dakota)
12,072,371
77,943,095
82,300,718
16,429,994
41 TOTAL
187,832,431
88,537,879
86,362,217
185,656,769


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: OtherRegulatoryLiabilities
Line No. Description (a) (b) (c) (d) (e) (f) (g)
MONTANA:
12/31/2020
Protected Unprotected Normalizing EDIT
TCJA Excess ADIT Account
Reduced
282 283 Subtotal Total 182.3 282 FERC Unamortized
Reg Asset Acccount Impacted 254 254 254 and 254 254 Total
1 Electric:
2 Regulatory Assets / Liabilities 2,549,287  2,549,287  2,528,933  —  2,528,933 
3 Unbilled Revenue —  —  962,125  —  962,125 
4 Compensation Accruals —  —  1,051,940  —  1,051,940 
5 Reserves & Accruals —  —  251,740  —  251,740 
6 Intangible amortization (11,135,481) (11,135,481) (11,135,481) —  (11,135,481)
7 Pension / Postretirement Benefits —  —  6,898,831  —  6,898,831 
8 Environmental Liability —  —  370,257  —  370,257 
9 Interest Rate Hedge —  —  —  —  — 
10 Customer Advances —  —  3,261,847  —  3,261,847 
11 Excess tax Depreciation / Other
Property
(73,688,573) —  (73,688,573) (73,688,573) (34,386,185) (108,074,758)
12 Net Operating Loss —  27,858,813  —  27,858,813 
13 Total Electric (73,688,573) (8,586,194) (82,274,767) (41,639,568) (34,386,185) (76,025,753)
14 Gas:
15 Regulatory Assets / Liabilities (2,112,982) (2,112,982) (2,138,623) —  (2,138,623)
16 Unbilled Revenue —  —  534,514  —  534,514 
17 Compensation Accruals —  —  584,411  —  584,411 
18 Reserves & Accruals —  —  116,195  —  116,195 
19 Intangible amortization (3,105,059) (3,105,059) (3,105,059) —  (3,105,059)
20 Pension / Postretirement Benefits —  —  3,834,145  —  3,834,145 
21 Environmental Liability —  —  205,698  —  205,698 
22 Interest Rate Hedge —  —  —  —  — 
23 Customer Advances —  —  1,264,062  —  1,264,062 
24 Excess tax Depreciation / Other
Property
(17,829,041) —  (17,829,041) (17,829,041) (9,909,934) (27,738,975)
25 Net Operating Loss —  (3,623,068) —  (3,623,068)
26 Total Gas (17,829,041) (5,218,041) (23,047,082) (20,156,766) (9,909,934) (30,066,700)
27 Other (Specify) —  —  —  678,445  258,806  937,251 
28 Subtotal (91,517,614) (13,804,235) (105,321,849) (61,117,889) (44,037,313) (105,155,202)
29 Gross-up (32,713,036) (4,934,333) (37,647,369) (21,846,632) (15,741,169) (37,587,801)
30 Total (124,230,650) (18,738,568) (142,969,218) (82,964,521) (59,778,482) (142,743,003)
31
32 Other (Specify)
33 QF Obligations —  —  —  —  —  — 
34 NOL Carryforward —  —  —  —  —  — 
35 AMT Credit Carryforward —  —  —  —  —  — 
36 Production Tax Credit —  —  —  —  —  — 
37 Regulatory Assets / Liabilities —  —  —  —  —  — 
38 Other, net —  —  —  678,445  258,806  937,251 
39 Total —  —  —  678,445  258,806  937,251 
40
41
42 12/31/2021
43 Protected Unprotected Normalizing EDIT
44 TCJA Excess ADIT Account
Reduced
282 283 Subtotal Total 182.3 282 FERC Unamortized
45 Reg Asset Acccount Impacted 254 254 254 and 254 254 Total
46 Electric:
47 Regulatory Assets / Liabilities 1,814,724  1,814,724  1,806,383  —  1,806,383 
48 Unbilled Revenue —  —  687,232  —  687,232 
49 Compensation Accruals —  —  751,386  —  751,386 
50 Reserves & Accruals —  —  179,940  —  179,940 
51 Intangible amortization (7,953,915) (7,953,915) (7,953,915) —  (7,953,915)
52 Pension / Postretirement Benefits —  —  4,927,736  —  4,927,736 
53 Environmental Liability —  —  264,469  —  264,469 
54 Interest Rate Hedge —  —  —  —  — 
55 Customer Advances —  —  2,329,891  —  2,329,891 
56 Excess tax Depreciation / Other
Property
(72,248,710) —  (72,248,710) (72,248,710) (24,561,561) (96,810,271)
57 Net Operating Loss —  26,940,081  —  26,940,081 
58 Total Electric (72,248,710) (6,139,191) (78,387,901) (42,315,507) (24,561,561) (66,877,068)
59 Gas:
60 Regulatory Assets / Liabilities (2,112,982) (2,112,982) (2,138,623) —  (2,138,623)
61 Unbilled Revenue —  —  534,514  —  534,514 
62 Compensation Accruals —  —  584,411  —  584,411 
63 Reserves & Accruals —  —  116,195  —  116,195 
64 Intangible amortization (3,105,059) (3,105,059) (3,105,059) —  (3,105,059)
65 Pension / Postretirement Benefits —  —  3,834,145  —  3,834,145 
66 Environmental Liability —  —  205,698  —  205,698 
67 Interest Rate Hedge —  —  —  —  — 
68 Customer Advances —  —  1,264,062  —  1,264,062 
69 Excess tax Depreciation / Other
Property
(17,338,964) —  (17,338,964) (17,338,964) (7,078,524) (24,417,488)
70 Net Operating Loss —  (3,503,486) —  (3,503,486)
71 Total Gas (17,338,964) (5,218,041) (22,557,005) (19,547,107) (7,078,524) (26,625,631)
72 Other (Specify) —  —  —  498,848  211,270  710,118 
73 Subtotal (89,587,674) (11,357,232) (100,944,906) (61,363,766) (31,428,815) (92,792,581)
74 Gross-up (32,023,178) (4,059,650) (36,082,828) (21,934,522) (11,234,252) (33,168,774)
75 Total (121,610,852) (15,416,882) (137,027,734) (83,298,288) (42,663,067) (125,961,355)
76
77 Other (Specify)
78 QF Obligations —  —  —  —  —  — 
79 NOL Carryforward —  —  —  —  —  — 
80 AMT Credit Carryforward —  —  —  —  —  — 
81 Production Tax Credit —  —  —  —  —  — 
82 Regulatory Assets / Liabilities —  —  —  —  —  — 
83 Other, net —  —  —  498,848  211,270  710,118 
84 Total —  —  —  498,848  211,270  710,118 
85
86
87 SOUTH DAKOTA:
88 12/31/2020
89 Protected Unprotected Normalizing EDIT
90 TCJA Excess ADIT Account
Reduced
282 283 Subtotal Total 182.3 282 FERC Unamortized
91 Reg Asset Acccount Impacted 254 254 254 and 254 254 Total
92 Electric:
93 Regulatory Assets / Liabilities —  —  —  —  — 
94 Unbilled Revenue —  —  —  —  — 
95 Compensation Accruals —  —  —  —  — 
96 Reserves & Accruals —  —  —  —  — 
97 Intangible amortization —  —  —  —  — 
98 Pension / Postretirement Benefits —  —  —  —  — 
99 Environmental Liability —  —  —  —  — 
100 Interest Rate Hedge —  —  —  —  — 
101 Customer Advances —  —  —  —  — 
102 Excess tax Depreciation / Other
Property
(15,857,295) —  (15,857,295) (15,857,295) (13,931,180) (29,788,475)
103 Net Operating Loss —  4,139,964  —  4,139,964 
104 Total Electric (15,857,295) —  (15,857,295) (11,717,331) (13,931,180) (25,648,511)
105 Gas:
106 Regulatory Assets / Liabilities (238,951) (238,951) (238,951) —  (238,951)
107 Unbilled Revenue —  —  237,268  —  237,268 
108 Compensation Accruals —  —  895,742  —  895,742 
109 Reserves & Accruals —  —  66,862  —  66,862 
110 Intangible amortization —  —  —  —  — 
111 Pension / Postretirement Benefits —  —  (67,853) —  (67,853)
112 Environmental Liability —  —  491,773  —  491,773 
113 Interest Rate Hedge —  —  —  —  — 
114 Customer Advances —  —  —  —  — 
115 Excess tax Depreciation / Other
Property
(1,530,269) —  (1,530,269) (1,530,269) (2,249,633) (3,779,902)
116 Net Operating Loss —  (165,266) —  (165,266)
117 Total Gas (1,530,269) (238,951) (1,769,220) (310,694) (2,249,633) (2,560,327)
118 Other (Specify) —  1,719  1,719  131,649  —  131,649 
119 Subtotal (17,387,564) (237,232) (17,624,796) (11,896,376) (16,180,813) (28,077,189)
120 Gross-up (4,622,011) (63,062) (4,685,072) (3,162,327) (4,301,229) (7,463,557)
121 Total (22,009,575) (300,294) (22,309,868) (15,058,703) (20,482,042) (35,540,746)
122
123 Other (Specify)
124 QF Obligations —  —  —  —  —  — 
125 NOL Carryforward —  —  —  —  —  — 
126 AMT Credit Carryforward —  —  —  —  —  — 
127 Production Tax Credit —  —  —  —  —  — 
128 Regulatory Assets / Liabilities —  —  —  —  —  — 
129 Other, net —  1,719  1,719  131,649  —  131,649 
130 Total —  1,719  1,719  131,649  —  131,649 
131
132
133 12/31/2021
134 Protected Unprotected Normalizing EDIT
135 TCJA Excess ADIT Account
Reduced
282 283 Subtotal Total 182.3 282 FERC Unamortized
136 Reg Asset Acccount Impacted 254 254 254 and 254 254 Total
137 Electric:
138 Regulatory Assets / Liabilities —  —  —  —  — 
139 Unbilled Revenue —  —  —  —  — 
140 Compensation Accruals —  —  —  —  — 
141 Reserves & Accruals —  —  —  —  — 
142 Intangible amortization —  —  —  —  — 
143 Pension / Postretirement Benefits —  —  —  —  — 
144 Environmental Liability —  —  —  —  — 
145 Interest Rate Hedge —  —  —  —  — 
146 Customer Advances —  —  —  —  — 
147 Excess tax Depreciation / Other
Property
(14,997,688) —  (14,997,688) (14,997,688) (13,466,337) (28,464,025)
148 Net Operating Loss —  4,001,825  —  4,001,825 
149 Total Electric (14,997,688) —  (14,997,688) (10,995,863) (13,466,337) (24,462,200)
150 Gas:
151 Regulatory Assets / Liabilities (238,951) (238,951) (238,951) —  (238,951)
152 Unbilled Revenue —  —  237,268  —  237,268 
153 Compensation Accruals —  —  895,742  —  895,742 
154 Reserves & Accruals —  —  66,862  —  66,862 
155 Intangible amortization —  —  —  —  — 
156 Pension / Postretirement Benefits —  —  (67,853) —  (67,853)
157 Environmental Liability —  —  491,773  —  491,773 
158 Interest Rate Hedge —  —  —  —  — 
159 Customer Advances —  —  —  —  — 
160 Excess tax Depreciation / Other Property (1,370,509) —  (1,370,509) (1,370,509) (2,174,569) (3,545,078)
161 Net Operating Loss —  (159,752) —  (159,752)
162 Total Gas (1,370,509) (238,951) (1,609,460) (145,420) (2,174,569) (2,319,989)
163 Other (Specify) —  1,719  1,719  131,649  —  131,649 
164 Subtotal (16,368,197) (237,232) (16,605,429) (11,009,634) (15,640,906) (26,650,540)
165 Gross-up (4,351,040) (63,062) (4,414,102) (2,926,612) (4,157,709) (7,084,321)
166 Total (20,719,237) (300,294) (21,019,531) (13,936,246) (19,798,615) (33,734,861)
167
168 Other (Specify)
169 QF Obligations —  —  —  —  —  — 
170 NOL Carryforward —  —  —  —  —  — 
171 AMT Credit Carryforward —  —  —  —  —  — 
172 Production Tax Credit —  —  —  —  —  — 
173 Regulatory Assets / Liabilities —  —  —  —  —  — 
174 Other, net —  1,719  1,719  131,649  —  131,649 
175 Total —  1,719  1,719  131,649  —  131,649 
(b) Concept: OtherRegulatoryLiabilities
Refer to footnote at column (f) line 1 for details.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Electric Operating Revenues
  1. The following instructions generally apply to the annual version of these pages. Do not report quarterly data in columns (c), (e), (f), and (g). Unbilled revenues and MWH related to unbilled revenues need not be reported separately as required in the annual version of these pages.
  2. Report below operating revenues for each prescribed account, and manufactured gas revenues in total.
  3. Report number of customers, columns (f) and (g), on the basis of meters, in addition to the number of flat rate accounts; except that where separate meter readings are added for billing purposes, one customer should be counted for each group of meters added. The average number of customers means the average of twelve figures at the close of each month.
  4. If increases or decreases from previous period (columns (c),(e), and (g)), are not derived from previously reported figures, explain any inconsistencies in a footnote.
  5. Disclose amounts of $250,000 or greater in a footnote for accounts 451, 456, and 457.2.
  6. Commercial and industrial Sales, Account 442, may be classified according to the basis of classification (Small or Commercial, and Large or Industrial) regularly used by the respondent if such basis of classification is not generally greater than 1000 Kw of demand. (See Account 442 of the Uniform System of Accounts. Explain basis of classification in a footnote.)
  7. See page 108, Important Changes During Period, for important new territory added and important rate increase or decreases.
  8. For Lines 2,4,5,and 6, see Page 304 for amounts relating to unbilled revenue by accounts.
  9. Include unmetered sales. Provide details of such Sales in a footnote.
Line No.
Title of Account
(a)
Operating Revenues Year to Date Quarterly/Annual
(b)
Operating Revenues Previous year (no Quarterly)
(c)
MEGAWATT HOURS SOLD Year to Date Quarterly/Annual
(d)
MEGAWATT HOURS SOLD Amount Previous year (no Quarterly)
(e)
AVG.NO. CUSTOMERS PER MONTH Current Year (no Quarterly)
(f)
AVG.NO. CUSTOMERS PER MONTH Previous Year (no Quarterly)
(g)
1
SalesOfElectricityHeadingAbstract
Sales of Electricity
2
ResidentialSalesAbstract
(440) Residential Sales
396,667,149
387,088,318
3,299,444
3,218,873
362,727
358,036
3
CommercialAndIndustrialSalesAbstract
(442) Commercial and Industrial Sales
4
CommercialSalesAbstract
Small (or Comm.) (See Instr. 4)
437,220,984
419,924,255
3,795,835
3,651,805
86,266
84,744
5
IndustrialSalesAbstract
Large (or Ind.) (See Instr. 4)
69,905,103
69,018,788
721,224
703,978
141
141
6
PublicStreetAndHighwayLightingAbstract
(444) Public Street and Highway Lighting
16,574,818
17,465,862
46,169
58,879
3,788
3,854
7
OtherSalesToPublicAuthoritiesAbstract
(445) Other Sales to Public Authorities
797,869
860,164
6,652
7,132
272
275
8
SalesToRailroadsAndRailwaysAbstract
(446) Sales to Railroads and Railways
9
InterdepartmentalSalesAbstract
(448) Interdepartmental Sales
858,550
880,015
7,525
7,634
342
344
10
SalesToUltimateConsumersAbstract
TOTAL Sales to Ultimate Consumers
922,024,473
895,237,402
7,876,849
7,648,301
453,536
447,394
11
SalesForResaleAbstract
(447) Sales for Resale
31,170,156
16,720,587
957,499
947,437
12
SalesOfElectricityAbstract
TOTAL Sales of Electricity
953,194,629
911,957,989
8,834,348
8,595,738
453,536
447,394
13
ProvisionForRateRefundsAbstract
(Less) (449.1) Provision for Rate Refunds
5,161,502
173,275
14
RevenuesNetOfProvisionForRefundsAbstract
TOTAL Revenues Before Prov. for Refunds
958,356,131
912,131,264
8,834,348
8,595,738
453,536
447,394
15
OtherOperatingRevenuesAbstract
Other Operating Revenues
16
ForfeitedDiscounts
(450) Forfeited Discounts
435,650
195,114
17
MiscellaneousServiceRevenues
(451) Miscellaneous Service Revenues
221,410
215,690
18
SalesOfWaterAndWaterPower
(453) Sales of Water and Water Power
19
RentFromElectricProperty
(454) Rent from Electric Property
(a)
4,001,542
4,049,966
20
InterdepartmentalRents
(455) Interdepartmental Rents
21
OtherElectricRevenue
(456) Other Electric Revenues
(b)
14,003,869
9,635,284
22
RevenuesFromTransmissionOfElectricityOfOthers
(456.1) Revenues from Transmission of Electricity of Others
81,029,963
71,769,716
23
RegionalTransmissionServiceRevenues
(457.1) Regional Control Service Revenues
24
MiscellaneousRevenue
(457.2) Miscellaneous Revenues
25
OtherMiscellaneousOperatingRevenues
Other Miscellaneous Operating Revenues
25.1
OtherMiscellaneousOperatingRevenues
(Less) (449.1) Provision for Rate Refunds
4,711,241
19,135,847
26
OtherOperatingRevenues
TOTAL Other Operating Revenues
104,403,675
66,729,923
27
ElectricOperatingRevenues
TOTAL Electric Operating Revenues
(c)
1,062,759,806
978,861,187
Line12, column (b) includes $
45,888,315
of unbilled revenues.
Line12, column (d) includes
414,435
MWH relating to unbilled revenues


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: RentFromElectricProperty
Rent from South Dakota electric property was $177,688 and $163,197 for 2021 and 2020, respectively.
Rent from Montana electric property was $3,823,854 and $3,886,769 for 2021 and 2020, respectively.
(b) Concept: OtherElectricRevenue
YTD Dec Montana Operations
Total Electric Revenue 2021 2020 2021 2020
Rate Revenue 922,024,473  895,237,402  751,527,178  724,731,404 
Sales for Resale & Coops 31,170,156  16,720,587  31,170,156  16,720,586 
Provision for Rate Refund - MPSC 5,161,502  173,275  5,161,502  328,275 
Provision for Rate Refund - FERC 4,711,241  (19,135,847) 4,711,241  (19,135,847)
Forfeited Discounts 435,650  195,114  —  — 
Service Revenue 221,410  215,690  —  — 
Rent 4,001,542  4,049,966  3,823,854  3,886,769 
Transmission (456.1) 80,695,683  71,535,336  73,964,512  64,981,146 
SPP Sch 7-8 Form Rate 334,280  234,380  —  — 
Other 14,003,869  9,635,284  13,621,747  9,248,658 
1,062,759,806   978,861,187   883,980,190   800,760,991  
YTD Dec Montana Operations
Other Electric Revenue (456) 2021 2020 2021 2020
Ancillary Services:
Scheduling, System Control and Dispatch $ 1,837,058  $ 1,273,330  $ 1,837,059  $ 1,273,330 
Regulation and Frequency Response 1,161,969  2,697,585  1,161,970  2,697,585 
Energy Imbalance 6,293,506  3,258,149  6,293,506  3,258,149 
Other Transmission Revenue 1,502,297  (410,239) 1,502,297  (410,239)
Low Income Housing 2,281,343  2,411,024  2,281,343  2,411,024 
Steam Sales 351,230  367,009 
Sale of Materials 56,376  34,919  26,914  16,635 
Miscellaneous 520,090  3,505  518,658  2,174 
$ 14,003,869   $ 9,635,282   $ 13,621,747   $ 9,248,658  
(c) Concept: ElectricOperatingRevenues
Montana Operations
Line No. Account
(a)
Operating Revenues
Year to Date
(b)
MWH Sold
Year to Date
(d)
Current Year Ave.
No. of Customers
(f)
2 (440) Residential Sales 331,238,070  2,728,149  311,922 
4 (442) Small Commercial and Industrial 367,052,083  3,148,266  73,536 
5 (442) Large Commercial and Industrial 37,599,103  276,332  77 
6 (444) Public Street and Highway Lighting 14,779,371  34,155  3,642 
9 (448) Interdepartmental Sales 858,551  7,525  342 
10 TOTAL Sales to Ultimate Consumers 751,527,178   6,194,427   389,519  
11 (447) Sales for Resale 31,170,156 
12 Total Sales of Electricity 782,697,334  
13 (449.1) Provision for Transmission Rate Refund (5,161,502)
14 Total Revenues Net of Prov. For Refunds 787,858,836  
16 (450) Forfeited Discounts
17 (451) Miscellaneous Service Revenue
19 (454) Rent from Electric Property 3,823,854 
21 (456) Other Electric Revenues 13,621,747 
22 (456.1) Transmission of Electricity for Others 73,930,492 
25 (449.1) Provision for Transmission Rate Refund 4,711,241 
26 TOTAL Other Operating Revenues 96,087,334  
27 TOTAL Electric Operating Revenues 883,946,170  
Line 12, column (b) includes $ 45,888,315  of unbilled revenues
Line 12, column (d) includes 414,435  MWH relating to unbilled rev

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
REGIONAL TRANSMISSION SERVICE REVENUES (Account 457.1)
  1. The respondent shall report below the revenue collected for each service (i.e., control area administration, market administration, etc.) performed pursuant to a Commission approved tariff. All amounts separately billed must be detailed below.
Line No.
Description of Service
(a)
Balance at End of Quarter 1
(b)
Balance at End of Quarter 2
(c)
Balance at End of Quarter 3
(d)
Balance at End of Year
(e)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
TOTAL


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
1
SD 10 Residential
388,066
47,291,888
38,943
9,965
0.1219
2
SD 11 Resid Space Htg 1 Meter
168,765
17,082,042
10,797
15,631
0.1012
3
SD 14 Resid Space Htg 2 Meters
12,829
827,552
1,029
12,467
0.0645
4
SD 15 Residential Dual-Fuel
69
4,267
7
9,857
0.0618
5
SD 95 Reddy Guard
1,566
223,330
29
54,000
0.1426
6
MT Residential
2,532,531
308,306,319
311,922
8,119
0.1217
7
MT Unbilled Revenue
195,618
22,931,751
41 TOTAL Billed Residential Sales
3,103,826
373,735,398
362,727
8,557
0.1204
42 TOTAL Unbilled Rev. (See Instr. 6)
195,618
22,931,751
43 TOTAL
3,299,444
396,667,149
362,727
9,096
0.1202


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
1
SD 16 Inter Irrigation
2,578
262,818
70
36,829
0.1019
2
SD 17 Irrigation Power
361
46,105
15
24,067
0.1277
3
SD 21 General Service
71,627
11,115,005
8,507
8,420
0.1552
4
SD 23 Comm Water Heat
536
49,253
59
9,085
0.0919
5
SD 24 Comm Space Heat
36,712
2,458,718
584
62,863
0.0670
6
SD 25 Comm Heating
38,600
3,805,784
801
48,190
0.0986
7
SD 33 Industrial Power
159,772
21,067,071
2,079
76,850
0.1319
8
SD 34 Industrial Power
332,608
30,512,651
426
780,770
0.0917
9
SD 70 Controlled Off-Peak
1,114
124,463
3
371,333
0.1117
10
SD 73 Small Qual Facil Rider, 38 P to P
211,042
12
0.0000
11
SD 95 Reddy Guard
3,662
515,991
175
20,926
0.1409
12
MT General Service - 1
2,844,582
333,246,387
71,605
39,726
0.1172
13
MT Irrigation
111,004
13,639,400
1,930
57,515
0.1229
14
MT General Service - 1 Unbilled
192,679
20,166,296
41 TOTAL Billed Small or Commercial
3,603,156
417,054,688
86,266
41,768
0.1157
42 TOTAL Unbilled Rev. Small or Commercial (See Instr. 6)
192,679
20,166,296
43 TOTAL Small or Commercial
3,795,835
437,220,984
86,266
44,002
0.1152


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
1
SD 34 Large Industrial
444,892
32,306,000
64
6,951,438
0.0726
2
MT General Service - 2
250,194
34,808,835
77
3,249,273
0.1391
3
MT General Service - 2 Unbilled
26,138
2,790,268
41 TOTAL Billed Large (or Ind.) Sales
695,086
67,114,835
141
4,929,688
0.0966
42 TOTAL Unbilled Rev. Large (or Ind.) (See Instr. 6)
26,138
2,790,268
43 TOTAL Large (or Ind.)
721,224
69,905,103
141
5,115,064
0.0969


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41 TOTAL Billed Commercial and Industrial Sales
42 TOTAL Unbilled Rev. (See Instr. 6)
43 TOTAL


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
1
SD 95 Public Lighting
12,014
1,795,447
146
82,288
0.1494
2
MT Lighting
34,155
14,779,371
3,642
9,378
0.4327
41 TOTAL Billed Public Street and Highway Lighting
46,169
16,574,818
3,788
12,188
0.3590
42 TOTAL Unbilled Rev. (See Instr. 6)
43 TOTAL
46,169
16,574,818
3,788
12,188
0.3590


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
1
SD 41 Municipal Pumping
6,652
797,869
272
24,456
0.1199
41 TOTAL Billed Other Sales to Public Authorities
6,652
797,869
272
24,456
0.1199
42 TOTAL Unbilled Rev. (See Instr. 6)
43 TOTAL
6,652
797,869
272
24,456
0.1199


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
1
Interdepartmental
7,525
858,550
342
22,003
0.1141
41 TOTAL Billed Interdepartmental Sales
7,525
858,550
342
22,003
0.1141
42 TOTAL Unbilled Rev. (See Instr. 6)
43 TOTAL
7,525
858,550
342
22,003
0.1141


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
1
Provision for Rate Refunds
5,161,502
41 TOTAL Billed Provision For Rate Refunds
5,161,502
42 TOTAL Unbilled Rev. (See Instr. 6)
43 TOTAL
5,161,502


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES OF ELECTRICITY BY RATE SCHEDULES
  1. Report below for each rate schedule in effect during the year the MWH of electricity sold, revenue, average number of customer, average Kwh per customer, and average revenue per Kwh, excluding date for Sales for Resale which is reported on Page 310.
  2. Provide a subheading and total for each prescribed operating revenue account in the sequence followed in "Electric Operating Revenues," Page 300. If the sales under any rate schedule are classified in more than one revenue account, List the rate schedule and sales data under each applicable revenue account subheading.
  3. Where the same customers are served under more than one rate schedule in the same revenue account classification (such as a general residential schedule and an off peak water heating schedule), the entries in column (d) for the special schedule should denote the duplication in number of reported customers.
  4. The average number of customers should be the number of bills rendered during the year divided by the number of billing periods during the year (12 if all billings are made monthly).
  5. For any rate schedule having a fuel adjustment clause state in a footnote the estimated additional revenue billed pursuant thereto.
  6. Report amount of unbilled revenue as of end of year for each applicable revenue account subheading.
Line No.
Number and Title of Rate Schedule
(a)
MWh Sold
(b)
Revenue
(c)
Average Number of Customers
(d)
KWh of Sales Per Customer
(e)
Revenue Per KWh Sold
(f)
41 TOTAL Billed - All Accounts
7,462,414
876,136,158
453,536
16,454
0.1174
42 TOTAL Unbilled Rev. (See Instr. 6) - All Accounts
414,435
45,888,315
43 TOTAL - All Accounts
7,876,849
922,024,473
453,536
16,454
0.1236


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SALES FOR RESALE (Account 447)
  1. Report all sales for resale (i.e., sales to purchasers other than ultimate consumers) transacted on a settlement basis other than power exchanges during the year. Do not report exchanges of electricity ( i.e., transactions involving a balancing of debits and credits for energy, capacity, etc.) and any settlements for imbalanced exchanges on this schedule. Power exchanges must be reported on the Purchased Power schedule (Page 326).
  2. Enter the name of the purchaser in column (a). Do note abbreviate or truncate the name or use acronyms. Explain in a footnote any ownership interest or affiliation the respondent has with the purchaser.
  3. In column (b), enter a Statistical Classification Code based on the original contractual terms and conditions of the service as follows:

    RQ - for requirements service. Requirements service is service which the supplier plans to provide on an ongoing basis (i.e., the supplier includes projected load for this service in its system resource planning). In addition, the reliability of requirements service must be the same as, or second only to, the supplier's service to its own ultimate consumers.

    LF - for tong-term service. "Long-term" means five years or Longer and "firm" means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions (e.g., the supplier must attempt to buy emergency energy from third parties to maintain deliveries of LF service). This category should not be used for Long-term firm service which meets the definition of RQ service. For all transactions identified as LF, provide in a footnote the termination date of the contract defined as the earliest date that either buyer or setter can unilaterally get out of the contract.

    IF - for intermediate-term firm service. The same as LF service except that "intermediate-term" means longer than one year but Less than five years.

    SF - for short-term firm service. Use this category for all firm services where the duration of each period of commitment for service is one year or less.

    LU - for Long-term service from a designated generating unit. "Long-term" means five years or Longer. The availability and reliability of service, aside from transmission constraints, must match the availability and reliability of designated unit.

    IU - for intermediate-term service from a designated generating unit. The same as LU service except that "intermediate-term" means Longer than one year but Less than five years.

    OS - for other service. use this category only for those services which cannot be placed in the above-defined categories, such as all non-firm service regardless of the Length of the contract and service from designated units of Less than one year. Describe the nature of the service in a footnote.

    AD - for Out-of-period adjustment. Use this code for any accounting adjustments or "true-ups" for service provided in prior reporting years. Provide an explanation in a footnote for each adjustment.

  4. Group requirements RQ sales together and report them starting at line number one. After listing all RQ sales, enter "Subtotal - RQ" in column (a). The remaining sales may then be listed in any order. Enter "Subtotal-Non-RQ" in column (a) after this Listing. Enter "Total'' in column (a) as the Last Line of the schedule. Report subtotals and total for columns (g) through (k).
  5. In Column (c), identify the FERC Rate Schedule or Tariff Number. On separate Lines, List all FERC rate schedules or tariffs under which service, as identified in column (b), is provided.
  6. For requirements RQ sales and any type of-service involving demand charges imposed on a monthly (or Longer) basis, enter the average monthly billing demand in column (d), the average monthly non-coincident peak (NCP) demand in column (e), and the average monthly coincident peak (CP) demand in column (f). For all other types of service, enter NA in columns (d), (e) and (f). Monthly NCP demand is the maximum metered hourly (60-minute integration) demand in a month. Monthly CP demand is the metered demand during the hour (60-minute integration) in which the supplier's system reaches its monthly peak. Demand reported in columns (e) and (f) must be in megawatts. Footnote any demand not stated on a megawatt basis and explain.
  7. Report in column (g) the megawatt hours shown on bills rendered to the purchaser.
  8. Report demand charges in column (h), energy charges in column (i), and the total of any other types of charges, including out-of-period adjustments, in column (j). Explain in a footnote all components of the amount shown in column (j). Report in column (k) the total charge shown on bills rendered to the purchaser.
  9. The data in column (g) through (k) must be subtotaled based on the RQ/Non-RQ grouping (see instruction 4), and then totaled on the Last -line of the schedule. The "Subtotal - RQ" amount in column (g) must be reported as Requirements Sales For Resale on Page 401, line 23. The "Subtotal - Non-RQ" amount in column (g) must be reported as Non-Requirements Sales For Resale on Page 401,line 24.
  10. Footnote entries as required and provide explanations following all required data.
ACTUAL DEMAND (MW) REVENUE
Line No.
Name of Company or Public Authority (Footnote Affiliations)
(a)
Statistical Classification
(b)
FERC Rate Schedule or Tariff Number
(c)
Average Monthly Billing Demand (MW)
(d)
Average Monthly NCP Demand
(e)
Average Monthly CP Demand
(f)
Megawatt Hours Sold
(g)
Demand Charges ($)
(h)
Energy Charges ($)
(i)
Other Charges ($)
(j)
Total ($) (h+i+j)
(k)
1
MONTANA
2
RESERVE SHARING SALES
3
AVISTA Corporation
0
0
0
33
1,390
1,390
4
BC HYDRO DISTRIBUTION
0
0
0
113
9,298
9,298
5
BONNEVILLE POWER ADMINISTRATION
0
0
0
30
1,295
1,295
6
GRID FORCE ENERGY MANAGEMENT, LLC
0
0
0
152
6,111
6,111
7
PACIFICORP
0
0
0
38
1,692
1,692
8
PORTLAND GENERAL ELECTRIC COMPANY
0
0
0
51
2,102
2,102
9
NATURENER GLACIER WIND
0
0
0
26
582
582
10
NATURENER WIND WATCH
0
0
0
62
1,501
1,501
11
TALEN MONTANA, LLC
0
0
0
529
14,031
14,031
12
IDAHO POWER COMPANY
0
0
0
9
479
479
13
PUGET SOUND ENERGY, INC
0
0
0
6
293
293
14
DOUGLAS COUNTY PUD
2
163
163
15
SACRAMENTO MUNICIPAL UTILITY DISTRICT
7
194
194
16
CHELAN COUNTY PUD
0
0
0
6
153
153
17
SEATTLE CITY LIGHT
0
0
0
61
6,141
6,141
18
AVANGRID
0
0
0
43
883
883
19
SUPPLY
20
Avista Corporation
46,082
1,307,801
1,307,801
21
Basin Electric Power Cooperative
2,121
207,505
207,505
22
Black Hills Power Inc
3,342
88,863
88,863
23
Bonneville Power Administration
82,188
2,080,654
2,080,654
24
Clatskanie Peoples Utility District - Electric
4,653
177,881
177,881
25
Shell Energy North America (US), L.P.
294,634
10,618,326
10,618,326
26
EDF Trading North America, LLC
18,377
302,406
302,406
27
Energy Keepers, Inc.
4,545
107,925
107,925
28
Eugene Water & Electric Board
14,303
540,298
540,298
29
Exelon Generation Company, LLC
2,120
110,790
110,790
30
Avangrid Renewables, LLC
25,665
1,251,845
1,251,845
31
Macquarie Energy LLC
78,094
1,942,778
1,942,778
32
Morgan Stanley Capital Group, Inc.
165,671
6,446,711
6,446,711
33
Pacificorp
491
19,775
19,775
34
Portland General Electric
54,827
1,575,970
1,575,970
35
Powerex Corporation
6,077
182,820
182,820
36
Puget Sound Energy
11,945
376,465
376,465
37
Rainbow Energy Marketing Corporation
14,877
358,418
358,418
38
Seattle City Light
7,090
209,270
209,270
39
Tacoma Power
9,297
300,030
300,030
40
Tenaska Power Services
79
3,555
3,555
41
The Energy Authority, Inc.
52,516
1,827,155
1,827,155
42
Tiber Montana, LLC
26,948
272,641
272,641
43
TransAlta Energy Marketing (US) Inc.
20,827
632,542
632,542
44
Western Area Power Administration
3,263
7,550
7,550
45
Evergy Kansas Central, Inc - Electric
246
6,150
6,150
46
Guzman Energy, LLC
4,821
126,006
126,006
47
Phillips 66 Company
525
15,650
15,650
48
Dynasty Power, Inc.
707
26,067
26,067
15
Subtotal - RQ
16
Subtotal-Non-RQ
957,499
31,170,156
31,170,156
17 Total
957,499
31,170,156
31,170,156


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ELECTRIC OPERATION AND MAINTENANCE EXPENSES

If the amount for previous year is not derived from previously reported figures, explain in footnote.

Line No.
Account
(a)
Amount for Current Year
(b)
Amount for Previous Year (c)
(c)
1
PowerProductionExpensesAbstract
1. POWER PRODUCTION EXPENSES
2
SteamPowerGenerationAbstract
A. Steam Power Generation
3
SteamPowerGenerationOperationAbstract
Operation
4
OperationSupervisionAndEngineeringSteamPowerGeneration
(500) Operation Supervision and Engineering
(a)
836,325
425,099
5
FuelSteamPowerGeneration
(501) Fuel
(b)
44,346,023
35,542,097
6
SteamExpensesSteamPowerGeneration
(502) Steam Expenses
3,516,005
3,346,019
7
SteamFromOtherSources
(503) Steam from Other Sources
8
SteamTransferredCredit
(Less) (504) Steam Transferred-Cr.
9
ElectricExpensesSteamPowerGeneration
(505) Electric Expenses
802,830
742,814
10
MiscellaneousSteamPowerExpenses
(506) Miscellaneous Steam Power Expenses
3,470,784
3,761,571
11
RentsSteamPowerGeneration
(507) Rents
33,465
32,719
12
Allowances
(509) Allowances
13
SteamPowerGenerationOperationsExpense
TOTAL Operation (Enter Total of Lines 4 thru 12)
53,005,432
43,850,319
14
SteamPowerGenerationMaintenanceAbstract
Maintenance
15
MaintenanceSupervisionAndEngineeringSteamPowerGeneration
(510) Maintenance Supervision and Engineering
1,255,207
1,213,181
16
MaintenanceOfStructuresSteamPowerGeneration
(511) Maintenance of Structures
1,006,898
942,670
17
MaintenanceOfBoilerPlantSteamPowerGeneration
(512) Maintenance of Boiler Plant
9,435,528
7,740,772
18
MaintenanceOfElectricPlantSteamPowerGeneration
(513) Maintenance of Electric Plant
2,285,341
1,568,974
19
MaintenanceOfMiscellaneousSteamPlant
(514) Maintenance of Miscellaneous Steam Plant
871,492
829,209
20
SteamPowerGenerationMaintenanceExpense
TOTAL Maintenance (Enter Total of Lines 15 thru 19)
14,854,466
12,294,806
21
PowerProductionExpensesSteamPower
TOTAL Power Production Expenses-Steam Power (Enter Total of Lines 13 & 20)
67,859,898
56,145,125
22
NuclearPowerGenerationAbstract
B. Nuclear Power Generation
23
NuclearPowerGenerationOperationAbstract
Operation
24
OperationSupervisionAndEngineeringNuclearPowerGeneration
(517) Operation Supervision and Engineering
25
NuclearFuelExpense
(518) Fuel
26
CoolantsAndWater
(519) Coolants and Water
27
SteamExpensesNuclearPowerGeneration
(520) Steam Expenses
28
SteamFromOtherSourcesNuclearPowerGeneration
(521) Steam from Other Sources
29
SteamTransferredCreditNuclearPowerGeneration
(Less) (522) Steam Transferred-Cr.
30
ElectricExpensesNuclearPowerGeneration
(523) Electric Expenses
31
MiscellaneousNuclearPowerExpenses
(524) Miscellaneous Nuclear Power Expenses
32
RentsNuclearPowerGeneration
(525) Rents
33
NuclearPowerGenerationOperationsExpense
TOTAL Operation (Enter Total of lines 24 thru 32)
34
NuclearPowerGenerationMaintenanceAbstract
Maintenance
35
MaintenanceSupervisionAndEngineeringNuclearPowerGeneration
(528) Maintenance Supervision and Engineering
36
MaintenanceOfStructuresNuclearPowerGeneration
(529) Maintenance of Structures
37
MaintenanceOfReactorPlantEquipmentNuclearPowerGeneration
(530) Maintenance of Reactor Plant Equipment
38
MaintenanceOfElectricPlantNuclearPowerGeneration
(531) Maintenance of Electric Plant
39
MaintenanceOfMiscellaneousNuclearPlant
(532) Maintenance of Miscellaneous Nuclear Plant
40
NuclearPowerGenerationMaintenanceExpense
TOTAL Maintenance (Enter Total of lines 35 thru 39)
41
PowerProductionExpensesNuclearPower
TOTAL Power Production Expenses-Nuclear. Power (Enter Total of lines 33 & 40)
42
HydraulicPowerGenerationAbstract
C. Hydraulic Power Generation
43
HydraulicPowerGenerationOperationAbstract
Operation
44
OperationSupervisionAndEngineeringHydraulicPowerGeneration
(535) Operation Supervision and Engineering
613,183
562,952
45
WaterForPower
(536) Water for Power
942,963
1,032,891
46
HydraulicExpenses
(537) Hydraulic Expenses
3,804,078
3,659,840
47
ElectricExpensesHydraulicPowerGeneration
(538) Electric Expenses
3,315,093
3,294,278
48
MiscellaneousHydraulicPowerGenerationExpenses
(539) Miscellaneous Hydraulic Power Generation Expenses
3,269,367
2,749,172
49
RentsHydraulicPowerGeneration
(540) Rents
788,771
786,169
50
HydraulicPowerGenerationOperationsExpense
TOTAL Operation (Enter Total of Lines 44 thru 49)
12,733,455
12,085,302
51
HydraulicPowerGenerationContinuedAbstract
C. Hydraulic Power Generation (Continued)
52
HydraulicPowerGenerationMaintenanceAbstract
Maintenance
53
MaintenanceSupervisionAndEngineeringHydraulicPowerGeneration
(541) Mainentance Supervision and Engineering
517,919
518,067
54
MaintenanceOfStructuresHydraulicPowerGeneration
(542) Maintenance of Structures
683,786
456,912
55
MaintenanceOfReservoirsDamsAndWaterways
(543) Maintenance of Reservoirs, Dams, and Waterways
758,707
803,272
56
MaintenanceOfElectricPlantHydraulicPowerGeneration
(544) Maintenance of Electric Plant
1,006,837
1,599,873
57
MaintenanceOfMiscellaneousHydraulicPlant
(545) Maintenance of Miscellaneous Hydraulic Plant
540,433
283,095
58
HydraulicPowerGenerationMaintenanceExpense
TOTAL Maintenance (Enter Total of lines 53 thru 57)
3,507,682
3,661,219
59
PowerProductionExpensesHydraulicPower
TOTAL Power Production Expenses-Hydraulic Power (Total of Lines 50 & 58)
16,241,137
15,746,521
60
OtherPowerGenerationAbstract
D. Other Power Generation
61
OtherPowerGenerationOperationAbstract
Operation
62
OperationSupervisionAndEngineeringOtherPowerGeneration
(546) Operation Supervision and Engineering
657,935
678,175
63
Fuel
(547) Fuel
23,477,997
8,401,315
64
GenerationExpenses
(548) Generation Expenses
7,456,228
6,544,867
64.1
OperationOfEnergyStorageEquipment
(548.1) Operation of Energy Storage Equipment
65
MiscellaneousOtherPowerGenerationExpenses
(549) Miscellaneous Other Power Generation Expenses
1,230,946
1,196,787
66
RentsOtherPowerGeneration
(550) Rents
67
OtherPowerGenerationOperationsExpense
TOTAL Operation (Enter Total of Lines 62 thru 67)
32,823,106
16,821,144
68
OtherPowerGenerationMaintenanceAbstract
Maintenance
69
MaintenanceSupervisionAndEngineeringOtherPowerGeneration
(551) Maintenance Supervision and Engineering
26,695
33,363
70
MaintenanceOfStructures
(552) Maintenance of Structures
64,563
20,546
71
MaintenanceOfGeneratingAndElectricPlant
(553) Maintenance of Generating and Electric Plant
2,039,101
1,730,538
71.1
MaintenanceOfEnergyStorageEquipmentOtherPowerGeneration
(553.1) Maintenance of Energy Storage Equipment
72
MaintenanceOfMiscellaneousOtherPowerGenerationPlant
(554) Maintenance of Miscellaneous Other Power Generation Plant
149,348
138,708
73
OtherPowerGenerationMaintenanceExpense
TOTAL Maintenance (Enter Total of Lines 69 thru 72)
2,279,707
1,923,155
74
PowerProductionExpensesOtherPower
TOTAL Power Production Expenses-Other Power (Enter Total of Lines 67 & 73)
35,102,813
18,744,299
75
OtherPowerSuplyExpensesAbstract
E. Other Power Supply Expenses
76
PurchasedPower
(555) Purchased Power
257,640,492
202,336,338
76.1
PowerPurchasedForStorageOperations
(555.1) Power Purchased for Storage Operations
0
77
SystemControlAndLoadDispatchingElectric
(556) System Control and Load Dispatching
280,190
297,006
78
OtherExpensesOtherPowerSupplyExpenses
(557) Other Expenses
(c)
49,075,418
18,409,788
79
OtherPowerSupplyExpense
TOTAL Other Power Supply Exp (Enter Total of Lines 76 thru 78)
208,845,264
221,043,132
80
PowerProductionExpenses
TOTAL Power Production Expenses (Total of Lines 21, 41, 59, 74 & 79)
328,049,112
311,679,077
81
TransmissionExpensesAbstract
2. TRANSMISSION EXPENSES
82
TransmissionExpensesOperationAbstract
Operation
83
OperationSupervisionAndEngineeringElectricTransmissionExpenses
(560) Operation Supervision and Engineering
2,795,081
2,599,212
85
LoadDispatchReliability
(561.1) Load Dispatch-Reliability
815,676
59,408
86
LoadDispatchMonitorAndOperateTransmissionSystem
(561.2) Load Dispatch-Monitor and Operate Transmission System
950,216
898,953
87
LoadDispatchTransmissionServiceAndScheduling
(561.3) Load Dispatch-Transmission Service and Scheduling
1,213,918
773,381
88
SchedulingSystemControlAndDispatchServices
(561.4) Scheduling, System Control and Dispatch Services
1,133,026
89
ReliabilityPlanningAndStandardsDevelopment
(561.5) Reliability, Planning and Standards Development
88,280
90
TransmissionServiceStudies
(561.6) Transmission Service Studies
85,622
91
GenerationInterconnectionStudies
(561.7) Generation Interconnection Studies
92
ReliabilityPlanningAndStandardsDevelopmentServices
(561.8) Reliability, Planning and Standards Development Services
93
StationExpensesTransmissionExpense
(562) Station Expenses
1,541,330
1,538,852
93.1
OperationOfEnergyStorageEquipmentTransmissionExpense
(562.1) Operation of Energy Storage Equipment
94
OverheadLineExpense
(563) Overhead Lines Expenses
1,482,861
1,449,752
95
UndergroundLineExpensesTransmissionExpense
(564) Underground Lines Expenses
96
TransmissionOfElectricityByOthers
(565) Transmission of Electricity by Others
27,314,195
27,300,939
97
MiscellaneousTransmissionExpenses
(566) Miscellaneous Transmission Expenses
280,251
139,794
98
RentsTransmissionElectricExpense
(567) Rents
1,051,313
894,402
99
TransmissionOperationExpense
TOTAL Operation (Enter Total of Lines 83 thru 98)
37,533,121
36,873,341
100
TransmissionMaintenanceAbstract
Maintenance
101
MaintenanceSupervisionAndEngineeringElectricTransmissionExpenses
(568) Maintenance Supervision and Engineering
589,057
561,866
102
MaintenanceOfStructuresTransmissionExpense
(569) Maintenance of Structures
28,013
39,569
103
MaintenanceOfComputerHardwareTransmission
(569.1) Maintenance of Computer Hardware
1,072,036
862,582
104
MaintenanceOfComputerSoftwareTransmission
(569.2) Maintenance of Computer Software
2,787
2,366
105
MaintenanceOfCommunicationEquipmentElectricTransmission
(569.3) Maintenance of Communication Equipment
107,053
119,406
106
MaintenanceOfMiscellaneousRegionalTransmissionPlant
(569.4) Maintenance of Miscellaneous Regional Transmission Plant
107
MaintenanceOfStationEquipmentTransmission
(570) Maintenance of Station Equipment
772,362
775,474
107.1
MaintenanceOfEnergyStorageEquipmentTransmission
(570.1) Maintenance of Energy Storage Equipment
108
MaintenanceOfOverheadLinesTransmission
(571) Maintenance of Overhead Lines
4,160,440
3,495,434
109
MaintenanceOfUndergroundLinesTransmission
(572) Maintenance of Underground Lines
201
274
110
MaintenanceOfMiscellaneousTransmissionPlant
(573) Maintenance of Miscellaneous Transmission Plant
111
TransmissionMaintenanceExpenseElectric
TOTAL Maintenance (Total of Lines 101 thru 110)
6,731,949
5,856,971
112
TransmissionExpenses
TOTAL Transmission Expenses (Total of Lines 99 and 111)
44,265,070
42,730,312
113
RegionalMarketExpensesAbstract
3. REGIONAL MARKET EXPENSES
114
RegionalMarketExpensesOperationAbstract
Operation
115
OperationSupervision
(575.1) Operation Supervision
116
DayAheadAndRealTimeMarketAdministration
(575.2) Day-Ahead and Real-Time Market Facilitation
403,856
400,969
117
TransmissionRightsMarketAdministration
(575.3) Transmission Rights Market Facilitation
118
CapacityMarketAdministration
(575.4) Capacity Market Facilitation
119
AncillaryServicesMarketAdministration
(575.5) Ancillary Services Market Facilitation
115,386
114,564
120
MarketMonitoringAndCompliance
(575.6) Market Monitoring and Compliance
57,694
57,281
121
MarketFacilitationMonitoringAndComplianceServices
(575.7) Market Facilitation, Monitoring and Compliance Services
122
RentsRegionalMarketExpenses
(575.8) Rents
123
RegionalMarketOperationExpense
Total Operation (Lines 115 thru 122)
576,936
572,814
124
RegionalMarketExpensesMaintenanceAbstract
Maintenance
125
MaintenanceOfStructuresAndImprovementsRegionalMarketExpenses
(576.1) Maintenance of Structures and Improvements
126
MaintenanceOfComputerHardware
(576.2) Maintenance of Computer Hardware
127
MaintenanceOfComputerSoftware
(576.3) Maintenance of Computer Software
128
MaintenanceOfCommunicationEquipmentRegionalMarketExpenses
(576.4) Maintenance of Communication Equipment
129
MaintenanceOfMiscellaneousMarketOperationPlant
(576.5) Maintenance of Miscellaneous Market Operation Plant
130
RegionalMarketMaintenanceExpense
Total Maintenance (Lines 125 thru 129)
131
RegionalMarketExpenses
TOTAL Regional Transmission and Market Operation Expenses (Enter Total of Lines 123 and 130)
576,936
572,814
132
DistributionExpensesAbstract
4. DISTRIBUTION EXPENSES
133
DistributionExpensesOperationAbstract
Operation
134
OperationSupervisionAndEngineeringDistributionExpense
(580) Operation Supervision and Engineering
3,368,549
3,410,735
135
LoadDispatching
(581) Load Dispatching
136
StationExpensesDistribution
(582) Station Expenses
1,612,335
1,380,160
137
OverheadLineExpenses
(583) Overhead Line Expenses
1,933,123
2,177,978
138
UndergroundLineExpenses
(584) Underground Line Expenses
2,886,644
2,767,308
138.1
OperationOfEnergyStorageEquipmentDistribution
(584.1) Operation of Energy Storage Equipment
139
StreetLightingAndSignalSystemExpenses
(585) Street Lighting and Signal System Expenses
189,357
284,393
140
MeterExpenses
(586) Meter Expenses
2,543,121
2,338,231
141
CustomerInstallationsExpenses
(587) Customer Installations Expenses
1,627,282
1,491,804
142
MiscellaneousDistributionExpenses
(588) Miscellaneous Expenses
2,946,278
2,834,600
143
RentsDistributionExpense
(589) Rents
79,059
96,152
144
DistributionOperationExpensesElectric
TOTAL Operation (Enter Total of Lines 134 thru 143)
17,185,748
16,781,361
145
DistributionExpensesMaintenanceAbstract
Maintenance
146
MaintenanceSupervisionAndEngineering
(590) Maintenance Supervision and Engineering
1,377,391
1,373,516
147
MaintenanceOfStructuresDistributionExpense
(591) Maintenance of Structures
35,634
38,824
148
MaintenanceOfStationEquipment
(592) Maintenance of Station Equipment
721,567
526,396
148.1
MaintenanceOfEnergyStorageEquipment
(592.2) Maintenance of Energy Storage Equipment
149
MaintenanceOfOverheadLines
(593) Maintenance of Overhead Lines
13,347,613
13,579,677
150
MaintenanceOfUndergroundLines
(594) Maintenance of Underground Lines
1,082,933
1,171,728
151
MaintenanceOfLineTransformers
(595) Maintenance of Line Transformers
118,023
117,524
152
MaintenanceOfStreetLightingAndSignalSystems
(596) Maintenance of Street Lighting and Signal Systems
635,363
718,085
153
MaintenanceOfMeters
(597) Maintenance of Meters
1,547,625
1,214,730
154
MaintenanceOfMiscellaneousDistributionPlant
(598) Maintenance of Miscellaneous Distribution Plant
44,445
47,119
155
DistributionMaintenanceExpenseElectric
TOTAL Maintenance (Total of Lines 146 thru 154)
18,910,594
18,787,599
156
DistributionExpenses
TOTAL Distribution Expenses (Total of Lines 144 and 155)
36,096,342
35,568,960
157
CustomerAccountsExpensesAbstract
5. CUSTOMER ACCOUNTS EXPENSES
158
CustomerAccountsExpensesOperationsAbstract
Operation
159
SupervisionCustomerAccountExpenses
(901) Supervision
160
MeterReadingExpenses
(902) Meter Reading Expenses
1,600,412
904,018
161
CustomerRecordsAndCollectionExpenses
(903) Customer Records and Collection Expenses
7,599,922
7,122,499
162
UncollectibleAccounts
(904) Uncollectible Accounts
160,180
3,858,697
163
MiscellaneousCustomerAccountsExpenses
(905) Miscellaneous Customer Accounts Expenses
87,471
45,940
164
CustomerAccountExpenses
TOTAL Customer Accounts Expenses (Enter Total of Lines 159 thru 163)
9,447,985
11,931,154
165
CustomerServiceAndInformationalExpensesAbstract
6. CUSTOMER SERVICE AND INFORMATIONAL EXPENSES
166
CustomerServiceAndInformationalExpensesOperationAbstract
Operation
167
SupervisionCustomerServiceAndInformationExpenses
(907) Supervision
168
CustomerAssistanceExpenses
(908) Customer Assistance Expenses
3,452,008
3,535,563
169
InformationalAndInstructionalAdvertisingExpenses
(909) Informational and Instructional Expenses
1,169,120
1,036,475
170
MiscellaneousCustomerServiceAndInformationalExpenses
(910) Miscellaneous Customer Service and Informational Expenses
625,631
596,808
171
CustomerServiceAndInformationExpenses
TOTAL Customer Service and Information Expenses (Total Lines 167 thru 170)
5,246,759
5,168,846
172
SalesExpenseAbstract
7. SALES EXPENSES
173
SalesExpenseOperationAbstract
Operation
174
SupervisionSalesExpense
(911) Supervision
175
DemonstratingAndSellingExpenses
(912) Demonstrating and Selling Expenses
176
AdvertisingExpenses
(913) Advertising Expenses
354,190
318,005
177
MiscellaneousSalesExpenses
(916) Miscellaneous Sales Expenses
178
SalesExpenses
TOTAL Sales Expenses (Enter Total of Lines 174 thru 177)
354,190
318,005
179
AdministrativeAndGeneralExpensesAbstract
8. ADMINISTRATIVE AND GENERAL EXPENSES
180
AdministrativeAndGeneralExpensesOperationAbstract
Operation
181
AdministrativeAndGeneralSalaries
(920) Administrative and General Salaries
32,114,942
28,292,223
182
OfficeSuppliesAndExpenses
(921) Office Supplies and Expenses
11,591,266
10,405,285
183
AdministrativeExpensesTransferredCredit
(Less) (922) Administrative Expenses Transferred-Credit
7,333,865
6,755,036
184
OutsideServicesEmployed
(923) Outside Services Employed
9,575,955
5,955,341
185
PropertyInsurance
(924) Property Insurance
3,097,423
2,805,847
186
InjuriesAndDamages
(925) Injuries and Damages
9,118,837
8,456,532
187
EmployeePensionsAndBenefits
(926) Employee Pensions and Benefits
(d)
30,464,999
22,105,555
188
FranchiseRequirements
(927) Franchise Requirements
189
RegulatoryCommissionExpenses
(928) Regulatory Commission Expenses
2,627,288
2,453,133
190
DuplicateChargesCredit
(929) (Less) Duplicate Charges-Cr.
191
GeneralAdvertisingExpenses
(930.1) General Advertising Expenses
26,062
34,854
192
MiscellaneousGeneralExpenses
(930.2) Miscellaneous General Expenses
(e)
13,568,468
14,077,117
193
RentsAdministrativeAndGeneralExpense
(931) Rents
1,489,592
1,623,252
194
AdministrativeAndGeneralOperationExpense
TOTAL Operation (Enter Total of Lines 181 thru 193)
106,340,967
89,454,103
195
AdministrativeAndGeneralExpensesMaintenanceAbstract
Maintenance
196
MaintenanceOfGeneralPlant
(935) Maintenance of General Plant
2,104,958
1,876,847
197
AdministrativeAndGeneralExpenses
TOTAL Administrative & General Expenses (Total of Lines 194 and 196)
108,445,925
91,330,950
198
OperationsAndMaintenanceExpensesElectric
TOTAL Electric Operation and Maintenance Expenses (Total of Lines 80, 112, 131, 156, 164, 171, 178, and 197)
532,482,319
499,300,118


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: OperationSupervisionAndEngineeringSteamPowerGeneration
MONTANA OPERATIONS
Line No. Account
(a)
Amount for Current Year
(b)
Amount for Previous Year
(b)
1 1. POWER PRODUCTION EXPENSES
2 A. Steam Power Generation
3 Operation
4 500 Operation supervision and engineering 29,749  33,361 
5 501 Fuel 28,328,968  19,536,379 
6 502 Steam expenses 1,782,038  1,725,039 
7 503 Steam from other sources
8 504 Less: Steam transferred-Cr
9 505 Electric expenses 197,583  138,726 
10 506 Miscellaneous steam power expenses 2,153,527  2,284,043 
11 507 Rents —  — 
12 509 Allowances
13 Total Operation 32,491,865  23,717,548 
14 Maintenance
15 510 Maintenance supervision and engineering 597,546  543,793 
16 511 Maintenance of structures 635,316  628,661 
17 512 Maintenance of boiler plant 5,872,037  5,731,181 
18 513 Maintenance of electric plant 1,408,466  1,234,088 
19 514 Maintenance of miscellaneous steam plant 399,293  420,690 
20 Total maintenance 8,912,658  8,558,413 
21 Total Power Production Expenses-Steam Power 41,404,523  32,275,961 
22 B. Nuclear Power Generation
23 Operation
24 517 Operation supervision and engineering
25 518 Fuel
26 519 Coolants and water
27 520 Steam expenses
28 521 Steam from other sources
29 522 Less: Steam transferred-Cr
30 523 Electric expenses
31 524 Miscellaneous nuclear power expenses
32 525 Rents
33 Total Operation —  — 
34 Maintenance
35 528 Maintenance supervision and engineering
36 529 Maintenance of structures
37 530 Maintenance of Reactor Plant Equipment
38 531 Maintenance of electric plant
39 532 Maintenance of miscellaneous nuclear plant
40 Total maintenance —  — 
41 Total Power Production Expenses-Nuc. Power —  — 
42 C. Hydraulic Power Generation
43 Operation
44 535 Operation supervision and engineering 613,183  562,952 
45 536 Water for power 942,963  1,032,891 
46 537 Hydraulic expenses 3,804,078  3,659,840 
47 538 Electric expenses 3,315,093  3,294,278 
48 539 Miscellaneous hydraulic power generation expenses 3,269,367  2,749,172 
49 540 Rents 788,771  786,169 
50 Total Operation 12,733,455  12,085,302 
51 C. Hydraulic Power Generation (continued)
52 Hydraulic Power Generation - Maintenance
53 541 Maintenance supervision and engineering 517,919  518,067 
54 542 Maintenance of structures 683,786  456,912 
55 543 Maintenance of reservoirs, dams and waterways 758,707  803,272 
56 544 Maintenance of electric plant 1,006,837  1,599,873 
57 545 Maintenance of miscellaneous hydraulic plant 540,433  283,095 
58 Total Maintenance 3,507,682  3,661,219 
59 Total power production expenses-hydraulic power 16,241,137  15,746,521 
60 D. Other Power Generation
61 Operation
62 546 Operation supervision and engineering 412,994  399,101 
63 547 Fuel 17,702,343  6,934,882 
64 548 Generation expenses 3,484,533  3,036,733 
65 549 Miscellaneous other power generation expenses 764,012  757,533 
66 550 Rents —  — 
67 Total Operation 22,363,882  11,128,249 
68 Maintenance
69 551 Maintenance supervision and engineering —  — 
70 552 Maintenance of structures 921  12,329 
71 553 Maintenance of generating and electric plant 1,447,583  1,148,558 
72 554 Maintenance of miscellaneous other power generating plant 139,071  107,865 
73 Total Maintenance 1,587,575  1,268,752 
74 Total power production expenses-other power 23,951,457  12,397,001 
75 E. Other Power Supply Expenses
76 555 Purchased power 225,096,748  180,422,579 
77 556 System control and load dispatching —  — 
78 557 Other expenses (37,816,439) 13,407,964 
79 Total other power supply exp 187,280,309  193,830,543 
80 Total power production expenses 268,877,426  254,250,026 
81 2. Transmission Expenses
82 Operation
83 560 Operation supervision and engineering 2,536,070  2,331,786 
84 561 Load dispatching —  — 
85 561.1 Load dispatch-reliability 815,676  898,953 
86 561.2 Load dispatch-monitor and operate transmission ssystem 785,789  676,041 
87 561.3 Load dispatch-transmission service and scheduling 1,210,918  1,130,026 
88 561.4 Scheduling, system control and dispatch services
89 561.5 Reliability, planning and standards development —  — 
90 561.6 Transmission service studies
91 561.7 Generation interconnection studies
92 561.8 Reliability, planning and standards development services
93 562 Station expenses 1,418,394  1,387,307 
94 563 Overhead line expenses 1,287,915  1,123,996 
95 564 Underground line expenses
96 565 Transmission of electricity by others 7,252,597  6,340,813 
97 566 Miscellaneous transmission expense 207,645  61,555 
98 567 Rents 1,055,995  889,746 
99 Total Operation 16,570,999  14,840,223 
100 Maintenance
101 568 Maintenance supervision and engineering 527,566  506,129 
102 569 Maintenance of structures 10,288  36,082 
103 569.1 Maintenance of computer hardware 1,072,036  862,582 
104 569.2 Maintenance of computer software 2,787  2,366 
105 569.3 Maintenance of communication equipment —  — 
106 569.4 Maintenance of miscellaneous regional transmission plant
107 570 Maintenance of station equipment 676,061  694,527 
108 571 Maintenance of overhead lines 3,957,825  3,283,286 
109 572 Maintenance of underground lines
110 573 Maintenance of miscellaneous transmission plant
111 Total Maintenance 6,246,563  5,384,972 
112 Total transmission expenses 22,817,562  20,225,195 
113 3. Regional Market Expenses
114 Operation
115 575.1 Operation supervision
116 575.2 Day-ahead and real-time market facilitation
117 575.3 Transmission rights market facilitation
118 575.4 Capacity market facilitation
119 575.5 Ancillary services market facilitation
120 575.6 Market monitoring and compliance
121 575.7 Market facilitation, monitoring and compliance services
122 575.8 Rents
123 Total Operation —  — 
124 Maintenance
125 576.1 Maintenance of structures and improvements
126 576.2 Maintenance of computer hardware
127 576.3 Maintenance of computer software
128 576.4 Maintenance of communication equipment
129 576.5 Maintenance of miscellaneous market operation plant
130 Total Maintenance —  — 
131 Total Regional Transmission and Market Op. Expns. —  — 
132 4. Distribution Expenses
133 Operation
134 580 Operations supervision and engineering 2,859,373  2,871,103 
135 581 Load dispatching
136 582 Station expenses 1,417,734  1,195,647 
137 583 Overhead line expenses 1,478,337  1,695,107 
138 584 Underground line expenses 2,142,808  2,043,936 
139 585 Street lighting and signal system expenses 124,938  229,415 
140 586 Meter expenses 2,070,041  1,900,270 
141 587 Customer installation expenses 1,396,370  1,308,772 
142 588 Miscellaneous distribution expenses 2,306,890  2,183,511 
143 589 Rents 79,059  96,152 
144 Total Operation 13,875,550  13,523,913 
145 Maintenance
146 590 Maintenance supervision and engineering 1,189,345  1,163,957 
147 591 Maintenance of structures 35,634  38,824 
148 592 Maintenance of station equipment 580,063  361,772 
149 593 Maintenance of overhead lines 11,870,107  11,900,005 
150 594 Maintenance of underground lines 941,998  947,424 
151 595 Maintenance of line transformers 111,926  91,275 
152 596 Maintenance of street lighting and signal systems 358,966  510,305 
153 597 Maintenance of meters 1,374,039  1,126,124 
154 598 Maintenance of miscellaneous distribution plant —  — 
155 Total Maintenance 16,462,078  16,139,686 
156 Total distribution expenses 30,337,628  29,663,599 
157 5. Customer Accounts Expenses
158 Operation
159 901 Supervision
160 902 Meter reading expenses 1,538,786  1,374,022 
161 903 Customer records and collection expenses 6,376,777  5,973,026 
162 904 Uncollectible accounts (205,302) 3,676,054 
163 905 Miscellaneous customer accounts expenses 35,261  (203)
164 Total customer accounts expenses 7,745,522  11,022,899 
165 Customer Service and Informational Expenses
166 Operation
167 907 Supervision
168 908 Customer assistance expenses 2,416,841  2,443,743 
169 909 Informational and instructional advertising expenses 1,053,901  919,043 
170 910 Miscellaneous customer service and informational expenses 561,511  596,808 
171 Total customer service and informational expenses 4,032,253  3,959,594 
172 7. Sales Expenses
173 Operation
174 911 Supervision
175 912 Demonstrating and selling expenses
176 913 Advertising expenses 327,676  297,533 
177 916 Miscellaneous sales expenses
178 Total sales expenses 327,676  297,533 
179 8. Administrative and General Expenses
180 Operation
181 920 Administrative and general salaries 27,967,490  24,517,551 
182 921 Office supplies and expenses 9,478,103  8,492,154 
183 922 Less: Administrative expenses transferred - credits 6,194,522  5,627,082 
184 923 Outside services employed 8,654,561  5,246,376 
185 924 Property insurance 2,361,896  2,241,024 
186 925 Injuries and damages 7,983,990  7,288,346 
187 926 Employee pensions and benefits 28,051,481  18,455,724 
188 927 Franchise requirements
189 928 Regulatory commission expenses 2,625,393  2,450,808 
190 929 Less: Duplicate charges - credit
191 930.1 General advertising expenses 9,677  23,794 
192 930.2 Miscellaneous general expenses 12,910,309  13,380,671 
193 931 Rents 1,191,702  1,290,014 
194 Total Operations 95,040,080  77,759,380 
195 Maintenance
196 935 Maintenance of general plant 1,885,403  1,753,618 
197 Total administrative and general expenses 96,925,483  79,512,998 
198 Total Elec. Op. and Maint. Expns. 431,063,550  398,931,844 
(b) Concept: FuelSteamPowerGeneration
SOUTH DAKOTA OPERATIONS
Line No. Account
(a)
Amount for Current Year
(b)
Amount for Previous Year
(b)
1 1. POWER PRODUCTION EXPENSES
2 A. Steam Power Generation
3 Operation
4 500 Operation supervision and engineering 806,576  391,738 
5 501 Fuel 16,017,055  16,005,718 
6 502 Steam expenses 1,733,967  1,620,980 
7 503 Steam from other sources
8 504 Less: Steam transferred-Cr
9 505 Electric expenses 605,247  604,088 
10 506 Miscellaneous steam power expenses 1,317,257  1,477,528 
11 507 Rents 33,465  32,719 
12 509 Allowances
13 Total Operation 20,513,567  20,132,771 
14 Maintenance
15 510 Maintenance supervision and engineering 657,661  669,388 
16 511 Maintenance of structures 371,582  314,009 
17 512 Maintenance of boiler plant 3,563,491  2,009,591 
18 513 Maintenance of electric plant 876,875  334,886 
19 514 Maintenance of miscellaneous steam plant 472,199  408,519 
20 Total maintenance 5,941,808  3,736,393 
21 Total Power Production Expenses-Steam Power 26,455,375  23,869,164 
22 B. Nuclear Power Generation
23 Operation
24 517 Operation supervision and engineering
25 518 Fuel
26 519 Coolants and water
27 520 Steam expenses
28 521 Steam from other sources
29 522 Less: Steam transferred-Cr
30 523 Electric expenses
31 524 Miscellaneous nuclear power expenses
32 525 Rents
33 Total Operation —  — 
34 Maintenance
35 528 Maintenance supervision and engineering
36 529 Maintenance of structures
37 530 Maintenance of Reactor Plant Equipment
38 531 Maintenance of electric plant
39 532 Maintenance of miscellaneous nuclear plant
40 Total maintenance —  — 
41 Total Power Production Expenses-Nuc. Power —  — 
42 C. Hydraulic Power Generation
43 Operation
44 535 Operation supervision and engineering
45 536 Water for power
46 537 Hydraulic expenses
47 538 Electric expenses
48 539 Miscellaneous hydraulic power generation expenses
49 540 Rents
50 Total Operation —  — 
51 C. Hydraulic Power Generation (continued)
52 Hydraulic Power Generation - Maintenance
53 541 Maintenance supervision and engineering
54 542 Maintenance of structures
55 543 Maintenance of reservoirs, dams and waterways
56 544 Maintenance of electric plant
57 545 Maintenance of miscellaneous hydraulic plant
58 Total Maintenance —  — 
59 Total power production expenses-hydraulic power —  — 
60 D. Other Power Generation
61 Operation
62 546 Operation supervision and engineering 244,941  279,074 
63 547 Fuel 5,775,654  1,466,433 
64 548 Generation expenses 3,971,695  3,508,134 
65 549 Miscellaneous other power generation expenses 466,934  439,254 
66 550 Rents —  — 
67 Total Operation 10,459,224  5,692,895 
68 Maintenance
69 551 Maintenance supervision and engineering 26,695  33,363 
70 552 Maintenance of structures 63,642  8,217 
71 553 Maintenance of generating and electric plant 591,518  581,980 
72 554 Maintenance of miscellaneous other power generating plant 10,277  30,843 
73 Total Maintenance 692,132  654,403 
74 Total power production expenses-other power 11,151,356  6,347,298 
75 E. Other Power Supply Expenses
76 555 Purchased power 32,543,744  21,913,759 
77 556 System control and load dispatching 280,190  297,006 
78 557 Other expenses (11,258,979) 5,001,824 
79 Total other power supply exp 21,564,955  27,212,589 
80 Total power production expenses 59,171,686  57,429,051 
81 2. Transmission Expenses
82 Operation
83 560 Operation supervision and engineering 259,011  267,426 
84 561 Load dispatching 63,158  59,408 
85 561.1 Load dispatch-reliability —  — 
86 561.2 Load dispatch-monitor and operate transmission ssystem 101,269  97,340 
87 561.3 Load dispatch-transmission service and scheduling 3,000  3,000 
88 561.4 Scheduling, system control and dispatch services
89 561.5 Reliability, planning and standards development 88,280  85,622 
90 561.6 Transmission service studies
91 561.7 Generation interconnection studies
92 561.8 Reliability, planning and standards development services
93 562 Station expenses 122,936  151,545 
94 563 Overhead line expenses 194,946  325,756 
95 564 Underground line expenses
96 565 Transmission of electricity by others 20,061,598  20,960,126 
97 566 Miscellaneous transmission expense 72,606  78,239 
98 567 Rents (4,682) 4,656 
99 Total Operation 20,962,122  22,033,118 
100 Maintenance
101 568 Maintenance supervision and engineering 61,491  55,737 
102 569 Maintenance of structures 17,725  3,487 
103 569.1 Maintenance of computer hardware —  — 
104 569.2 Maintenance of computer software —  — 
105 569.3 Maintenance of communication equipment 107,053  119,406 
106 569.4 Maintenance of miscellaneous regional transmission plant
107 570 Maintenance of station equipment 96,301  80,947 
108 571 Maintenance of overhead lines 202,615  212,148 
109 572 Maintenance of underground lines 201  274 
110 573 Maintenance of miscellaneous transmission plant
111 Total Maintenance 485,386  471,999 
112 Total transmission expenses 21,447,508  22,505,117 
113 3. Regional Market Expenses
114 Operation
115 575.1 Operation supervision
116 575.2 Day-ahead and real-time market facilitation 403,856  400,969 
117 575.3 Transmission rights market facilitation
118 575.4 Capacity market facilitation
119 575.5 Ancillary services market facilitation 115,386  114,564 
120 575.6 Market monitoring and compliance 57,694  57,281 
121 575.7 Market facilitation, monitoring and compliance services
122 575.8 Rents
123 Total Operation 576,936  571,047 
124 Maintenance
125 576.1 Maintenance of structures and improvements
126 576.2 Maintenance of computer hardware
127 576.3 Maintenance of computer software
128 576.4 Maintenance of communication equipment
129 576.5 Maintenance of miscellaneous market operation plant
130 Total Maintenance —  — 
131 Total Regional Transmission and Market Op. Expns. + 571,047 
132 4. Distribution Expenses
133 Operation
134 580 Operations supervision and engineering 509,176  539,632 
135 581 Load dispatching
136 582 Station expenses 194,601  184,513 
137 583 Overhead line expenses 454,786  482,871 
138 584 Underground line expenses 743,836  723,372 
139 585 Street lighting and signal system expenses 64,419  54,978 
140 586 Meter expenses 473,080  437,961 
141 587 Customer installation expenses 230,912  183,032 
142 588 Miscellaneous distribution expenses 639,388  651,089 
143 589 Rents —  — 
144 Total Operation 3,310,198  3,257,448 
145 Maintenance
146 590 Maintenance supervision and engineering 188,046  209,559 
147 591 Maintenance of structures
148 592 Maintenance of station equipment 141,504  164,624 
149 593 Maintenance of overhead lines 1,477,506  1,679,672 
150 594 Maintenance of underground lines 140,935  224,304 
151 595 Maintenance of line transformers 6,097  26,249 
152 596 Maintenance of street lighting and signal systems 276,397  207,780 
153 597 Maintenance of meters 173,586  88,606 
154 598 Maintenance of miscellaneous distribution plant 44,445  47,119 
155 Total Maintenance 2,448,516  2,647,913 
156 Total distribution expenses 5,758,714  5,905,361 
157 5. Customer Accounts Expenses
158 Operation
159 901 Supervision
160 902 Meter reading expenses 61,626  (470,004)
161 903 Customer records and collection expenses 1,223,145  1,149,473 
162 904 Uncollectible accounts 365,482  182,643 
163 905 Miscellaneous customer accounts expenses 52,210  46,143 
164 Total customer accounts expenses 1,702,463  908,255 
165 Customer Service and Informational Expenses
166 Operation
167 907 Supervision
168 908 Customer assistance expenses 1,035,167  1,091,820 
169 909 Informational and instructional advertising expenses 115,219  117,432 
170 910 Miscellaneous customer service and informational expenses 64,120  — 
171 Total customer service and informational expenses 1,214,506  1,209,252 
172 7. Sales Expenses
173 Operation
174 911 Supervision
175 912 Demonstrating and selling expenses
176 913 Advertising expenses 26,514  20,472 
177 916 Miscellaneous sales expenses
178 Total sales expenses 26,514  20,472 
179 8. Administrative and General Expenses
180 Operation
181 920 Administrative and general salaries 4,147,452  3,774,672 
182 921 Office supplies and expenses 2,113,163  1,913,131 
183 922 Less: Administrative expenses transferred - credits 1,139,343  1,127,954 
184 923 Outside services employed 921,394  708,965 
185 924 Property insurance 735,527  564,823 
186 925 Injuries and damages 1,134,847  1,168,186 
187 926 Employee pensions and benefits 2,413,518  3,649,831 
188 927 Franchise requirements
189 928 Regulatory commission expenses 1,895  2,325 
190 929 Less: Duplicate charges - credit
191 930.1 General advertising expenses 16,385  11,060 
192 930.2 Miscellaneous general expenses 658,159  696,446 
193 931 Rents 297,890  333,238 
194 Total Operations 11,300,887  11,694,723 
195 Maintenance
196 935 Maintenance of general plant 219,555  123,229 
197 Total administrative and general expenses 11,520,442  11,817,952 
198 Total Elec. Op. and Maint. Expns. 101,418,769  100,368,274 
(c) Concept: OtherExpensesOtherPowerSupplyExpenses
Account 557 Other Expenses Amount
Account 557 Total Expense (37,785,881)
Less: Variable Supply Costs (39,002,836)
Amount to disclose in FERC Template page WP_FCR 1,216,955  
Account 557 Fixed costs:
Wind Procurement Costs 97,543 
OATI-Default Electric Supply 268 
Schedulers-Default Electric — 
Res Acq EL-Supply Operations 791,428 
Mktg Sup EL-Supply Operation 250,111 
Gen Adm Oth Power Sup 18,617 
Eng Sup Plan-Other Power Sup 40,597 
Mktg Supply-Other Power Supp 18,391 
Subtotal 1,216,955  
(d) Concept: EmployeePensionsAndBenefits
Plan Name MT Medical
 (Regulatory)
Country US
Fiscal year ending on Dec 31, 2021
A. Net Periodic Benefit Cost
1. Service cost $ 356,316 
2. Interest cost 279,258 
3. Expected return on plan assets
(919,362)
4. Amortization of initial net obligation (asset) — 
5. Amortization of prior service cost (1,798,049)
6. Amortization of net (gain) loss 521,409 
7. Curtailment (gain)/loss recognized — 
8. Settlement (gain)/loss recognized — 
9. Special termination benefit recognized — 
10. Net periodic benefit cost $ (1,560,428)
Electric Only Total
510440 FAS 106 Expense - Service Cost 356,316 
604151 FAS 106 Expense - Non Service Costs (2,626,528)
604154 Amortization of Benefits Costs 709,784 
$ (1,560,428)
(e) Concept: MiscellaneousGeneralExpenses
Montana
Operations
South Dakota
Operations
Total 930.2
Universal System Benefits Charge 10,017,316  10,017,316 
Our Portion of Shared Ownership Gen 520,749  520,749 
Uncollectible Accounts (31,965) 52  (31,913)
10,506,100  52  10,506,152 
Board of Directors Fees 1,673,137  306,742  1,979,879 
Shareholder Expense 204,540  26,048  230,587 
Industry & Association Dues 252,987  157,210  410,197 
Business Development/Community Relations 196,100  42,488  238,588 
Economic Development 54,924  125,602  180,525 
Miscellaneous 22,522  17  22,540 
2,404,209  658,107  3,062,317 
Total Account 930.2 12,910,309   658,159   13,568,468  

Montana Operations Miscellaneous General Expenses account 930.2 includes $63,818 of Electric non-allowed Industry and Association Dues, which is removed for rate making purposes.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
PURCHASED POWER (Account 555)
  1. Report all power purchases made during the year. Also report exchanges of electricity (i.e., transactions involving a balancing of debits and credits for energy, capacity, etc.) and any settlements for imbalanced exchanges.
  2. Enter the name of the seller or other party in an exchange transaction in column (a). Do not abbreviate or truncate the name or use acronyms. Explain in a footnote any ownership interest or affiliation the respondent has with the seller.
  3. In column (b), enter a Statistical Classification Code based on the original contractual terms and conditions of the service as follows:

    RQ - for requirements service. Requirements service is service which the supplier plans to provide on an ongoing basis (i.e., the supplier includes projects load for this service in its system resource planning). In addition, the reliability of requirement service must be the same as, or second only to, the supplier's service to its own ultimate consumers.

    LF - for long-term firm service. "Long-term" means five years or longer and "firm" means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions (e.g., the supplier must attempt to buy emergency energy from third parties to maintain deliveries of LF service). This category should not be used for long-term firm service firm service which meets the definition of RQ service. For all transaction identified as LF, provide in a footnote the termination date of the contract defined as the earliest date that either buyer or seller can unilaterally get out of the contract.

    IF - for intermediate-term firm service. The same as LF service expect that "intermediate-term" means longer than one year but less than five years.

    SF - for short-term service. Use this category for all firm services, where the duration of each period of commitment for service is one year or less.

    LU - for long-term service from a designated generating unit. "Long-term" means five years or longer. The availability and reliability of service, aside from transmission constraints, must match the availability and reliability of the designated unit.

    IU - for intermediate-term service from a designated generating unit. The same as LU service expect that "intermediate-term" means longer than one year but less than five years.

    EX - For exchanges of electricity. Use this category for transactions involving a balancing of debits and credits for energy, capacity, etc. and any settlements for imbalanced exchanges.

    OS - for other service. Use this category only for those services which cannot be placed in the above-defined categories, such as all non-firm service regardless of the Length of the contract and service from designated units of Less than one year. Describe the nature of the service in a footnote for each adjustment.

    AD - for out-of-period adjustment. Use this code for any accounting adjustments or "true-ups" for service provided in prior reporting years. Provide an explanation in a footnote for each adjustment.

  4. In column (c), identify the FERC Rate Schedule Number or Tariff, or, for non-FERC jurisdictional sellers, include an appropriate designation for the contract. On separate lines, list all FERC rate schedules, tariffs or contract designations under which service, as identified in column (b), is provided.
  5. For requirements RQ purchases and any type of service involving demand charges imposed on a monnthly (or longer) basis, enter the monthly average billing demand in column (d), the average monthly non-coincident peak (NCP) demand in column (e), and the average monthly coincident peak (CP) demand in column (f). For all other types of service, enter NA in columns (d), (e) and (f). Monthly NCP demand is the maximum metered hourly (60-minute integration) demand in a month. Monthly CP demand is the metered demand during the hour (60-minute integration) in which the supplier's system reaches its monthly peak. Demand reported in columns (e) and (f) must be in megawatts. Footnote any demand not stated on a megawatt basis and explain.
  6. Report in column (g) the megawatthours shown on bills rendered to the respondent, excluding purchases for energy storage. Report in column (h) the megawatthours shown on bills rendered to the respondent for energy storage purchases. Report in columns (i) and (j) the megawatthours of power exchanges received and delivered, used as the basis for settlement. Do not report net exchange.
  7. Report demand charges in column (k), energy charges in column (l), and the total of any other types of charges, including out-of-period adjustments, in column (m). Explain in a footnote all components of the amount shown in column (m). Report in column (n) the total charge shown on bills received as settlement by the respondent. For power exchanges, report in column (n) the settlement amount for the net receipt of energy. If more energy was delivered than received, enter a negative amount. If the settlement amount (m) include credits or charges other than incremental generation expenses, or (2) excludes certain credits or charges covered by the agreement, provide an explanatory footnote.
  8. The data in columns (g) through (n) must be totaled on the last line of the schedule. The total amount in columns (g) and (h) must be reported as Purchases on Page 401, line 10. The total amount in column (i) must be reported as Exchange Received on Page 401, line 12. The total amount in column (j) must be reported as Exchange Delivered on Page 401, line 13.
  9. Footnote entries as required and provide explanations following all required data.
Actual Demand (MW) POWER EXCHANGES COST/SETTLEMENT OF POWER
Line No.
NameOfCompanyOrPublicAuthorityProvidingPurchasedPower
Name of Company or Public Authority (Footnote Affiliations)
(a)
StatisticalClassificationCode
Statistical Classification
(b)
RateScheduleTariffNumber
Ferc Rate Schedule or Tariff Number
(c)
AverageMonthlyBillingDemand
Average Monthly Billing Demand (MW)
(d)
AverageMonthlyNonCoincidentPeakDemand
Average Monthly NCP Demand
(e)
AverageMonthlyCoincidentPeakDemand
Average Monthly CP Demand
(f)
MegawattHoursPurchasedOtherThanStorage
MegaWatt Hours Purchased (Excluding for Energy Storage)
(g)
MegawattHoursPurchasedForEnergyStorage
MegaWatt Hours Purchased for Energy Storage
(h)
EnergyReceivedThroughPowerExchanges
MegaWatt Hours Received
(i)
EnergyDeliveredThroughPowerExchanges
MegaWatt Hours Delivered
(j)
DemandChargesOfPurchasedPower
Demand Charges ($)
(k)
EnergyChargesOfPurchasedPower
Energy Charges ($)
(l)
OtherChargesOfPurchasedPower
Other Charges ($)
(m)
SettlementOfPower
Total (k+l+m) of Settlement ($)
(n)
1
MONTANA PURCHASES
2
QUALIFYING FACILITIES
3
TIER II QF CONTRACTS:
4
Billings Generation Inc (TIER II QF)
458,524
46,465,506
(a)
9,705
46,455,801
5
Colstrip Energy Ltd/Montana One (TIER II QF)
322,002
26,277,112
(b)
203,793
26,073,319
6
Hydrodynamics - South Dry Creek (TIER II QF)
392
21,742
(c)
380
21,362
7
Hydrodynamics - Strawberry Creek (TIER II QF)
1,270
80,833
(d)
235
80,598
8
Pine Creek (TIER II QF)
1,206
95,716
(e)
5,732
89,984
9
Ross Creek Hydro (TIER II QF)
1,809
68,179
(f)
2,840
65,339
10
State of Montana-DNRC / Broadwater Dam (TIER II QF)
21,276
2,894,880
(g)
5,088
2,889,792
11
NON TIER II QF-1 CONTRACTS
12
71 Ranch, LP (NON TIER II QF-1)
10,974
605,569
605,569
13
Big Timber Wind, LLC (NON TIER II QF-1)
78,869
3,577,484
3,577,484
14
Boulder Hydro (NON TIER II QF-1)
1,045
51,818
51,818
15
Two Dot Wind, Broadview East, LLC (NON TIER II QF-1)
4,901
250,311
250,311
16
Cycle Horseshoe Bend Wind, LLC (NON TIER II QF-1)
2,659
122,699
122,699
17
DA Winds (NON TIER II QF-1)
10,904
604,679
604,679
18
Flint Creek Hydroelectric, LLC (NON TIER II QF-1)
10,976
771,612
771,612
19
Fairfield Wind, LLC (NON TIER II QF-1)
27,531
1,876,629
1,876,629
20
Gordon Butte Wind, LLC (NON TIER II QF-1)
36,817
2,548,124
2,548,124
21
Greenfield Wind, LLC (NON TIER II QF-1)
85,298
4,248,085
4,248,085
22
Hanover Hydro Project (NON TIER II QF-1)
313
19,359
19,359
23
Hydrodynamics - South Dry Creek (NON TIER II QF-1)
2,390
113,039
113,039
24
Lower South Fork Hydro, LLC (NON TIER II QF-1)
459
33,029
33,029
25
Musselshell Wind Project 1, LLC (NON TIER II QF-1)
24,040
1,663,789
1,663,789
26
Musselshell Wind Project 2, LLC (NON TIER II QF-1)
28,853
1,996,902
1,996,902
27
Oversight Resources, LLC (NON TIER II QF-1)
10,281
560,485
560,485
28
Pony Hydro (NON TIER II QF-1)
712
32,409
32,409
29
Stillwater Wind, LLC (NON TIER II QF-1)
260,109
9,777,637
9,777,637
30
Wisconsin Creek, LLC (NON TIER II QF-1)
529
19,684
19,684
31
South Peak Wind (NON TIER II QF-1)
293,532
6,581,433
6,581,433
32
Barney Creek (NON TIER II QF-1)
55
2,251
2,251
33
Cascade Creek (NON TIER II QF-1)
251
11,493
11,493
34
KEC Fighting Creek (NON TIER II QF-1)
3,237
199,990
199,990
35
NON TIER II SOLAR QF CONTRACTS
36
Black Eagle Solar, LLC (NON TIER II SOLAR QF)
5,676
358,876
358,876
37
Great Divide Solar LLC (NON TIER II SOLAR QF)
6,232
398,840
398,840
38
Green Meadow Solar, LLC (NON TIER II SOLAR QF)
5,860
373,391
373,391
39
Magpie Solar, LLC (NON TIER II SOLAR QF)
5,633
354,632
354,632
40
River Bend Solar, LLC (NON TIER II SOLAR QF)
3,845
242,061
242,061
41
South Mills Solar 1, LLC (NON TIER II SOLAR QF)
6,416
408,018
408,018
42
RESERVE SHARING TRANSACTIONS:
43
AVISTA CORPORATION (RESERVE SHARING)
40
979
979
44
AVANGRID RENEWABLES, LLC (RESERVE SHARING)
62
1,577
1,577
45
BONNEVILLE POWER ADMINISTRATION (RESERVE SHARING)
712
18,153
18,153
46
CHELAN COUNT PUD (RESERVE SHARING)
38
982
982
47
GRIDFORCE ENERGY MANAGEMENT (RESERVE SHARING)
56
1,581
1,581
48
DOUGLAS COUNTY PUD (RESERVE SHARING)
17
470
470
49
GRANT COUNTY PUD (RESERVE SHARING)
67
1,747
1,747
50
IDAHO POWER COMPANY (RESERVE SHARING)
2
43
43
51
NATURENER GLACIER WIND ENERGY (RESERVE SHARING)
4
100
100
52
NATURENER WIND WATCH (RESERVE SHARING)
6
142
142
53
PACIFICORP (RESERVE SHARING)
155
4,249
4,249
54
PORTLAND GENERAL ELECTRIC COMPANY (RESERVE SHARING)
135
3,344
3,344
55
PUGET SOUND ENERGY (RESERVE SHARING)
129
3,494
3,494
56
SEATTLE CITY LIGHT (RESERVE SHARING)
79
2,119
2,119
57
TACOMA POWER (RESERVE SHARING)
42
1,079
1,079
58
WESTERN AREA POWER ADMINISTATION (RESERVE SHARING)
8
239
239
59
EXCHANGES:
60
Pacificorp - Costrip Loss/Startup (EXCHANGES)
3,255
3,231
1,044
1,044
61
Talen Energy Marketing, LLC - Startup (EXCHANGES)
4,840
4,852
628
628
62
Portland General Electric - Colstrip Loss/Startup (EXCHANGES)
6,447
6,448
128
128
63
Puget Sound Energy - Colstrip Units 3&4 Startup (EXCHANGES)
8,069
8,078
584
584
64
Northwestern Energy Colstrip Unit 4 - Startup (EXCHANGES)
4,844
4,829
514
514
65
AVISTA Corporation - Colstrip Loss/Startup (EXCHANGES)
4,826
4,847
761
761
66
Western Area Power Administration - Reg Correction (EXCHANGES)
334
3,461
87,704
87,704
67
PURCHASED POWER SUPPLY:
68
Avista Corporation (PURCHASED POWER SUPPLY)
46,211
2,172,555
2,172,555
69
Basin Electric Power Cooperative (PURCHASED POWER SUPPLY)
28,367
2,721,198
2,721,198
70
Basin Creek-Electric (PURCHASED POWER SUPPLY)
119,698
6,161,300
6,161,300
71
Black Hills Power Inc (PURCHASED POWER SUPPLY)
650
23,830
23,830
72
Bonneville Power Administration (PURCHASED POWER SUPPLY)
79,889
5,129,430
5,129,430
73
Clatskanie Peoples Utility District - Electric (PURCHASED POWER SUPPLY)
1,336
68,531
68,531
74
ConocoPhillips Company (PURCHASED POWER SUPPLY)
10,697
497,748
497,748
75
Shell Energy North America (US), L.P. (PURCHASED POWER SUPPLY)
24,095
865,860
865,860
76
Exelon Generation Company, LLC (PURCHASED POWER SUPPLY)
3,518
88,481
88,481
77
EDF Trading North America, LLC (PURCHASED POWER SUPPLY)
130,323
6,875,271
6,875,271
78
Energy Keepers, Inc. (PURCHASED POWER SUPPLY)
36,028
2,332,856
2,332,856
79
Eugene Water & Electric Board (PURCHASED POWER SUPPLY)
5,102
212,139
212,139
80
Avangrid Renewables, LLC (PURCHASED POWER SUPPLY)
30,230
939,409
939,409
81
Idaho Power Company (PURCHASED POWER SUPPLY)
3,767
168,080
168,080
82
Invenergy Energy Marketing LLC-Electric (PURCHASED POWER SUPPLY)
462,499
14,867,606
14,867,606
83
Macquarie Energy LLC (PURCHASED POWER SUPPLY)
36,465
3,992,661
3,992,661
84
Morgan Stanley Capital Group, Inc. (PURCHASED POWER SUPPLY)
451,298
30,284,752
30,284,752
85
PacifiCorp (PURCHASED POWER SUPPLY)
5,050
185,306
185,306
86
Portland General Electric (PURCHASED POWER SUPPLY)
109,979
5,481,766
5,481,766
87
Powerex Corp. (PURCHASED POWER SUPPLY)
27,928
10,647,301
10,647,301
88
Talen Energy Marketing, LLC (PURCHASED POWER SUPPLY)
1,860
53,430
53,430
89
Puget Sound Energy (PURCHASED POWER SUPPLY)
42,332
1,918,185
1,918,185
90
Rainbow Energy Marketing Corporation (PURCHASED POWER SUPPLY)
22,061
1,708,053
1,708,053
91
Seattle City Light (PURCHASED POWER SUPPLY)
13,816
749,468
749,468
92
Tacoma Power (PURCHASED POWER SUPPLY)
10,817
469,093
469,093
93
The Energy Authority, Inc. (PURCHASED POWER SUPPLY)
36,811
1,915,131
1,915,131
94
Tiber Montana, LLC (PURCHASED POWER SUPPLY)
52,390
944,001
944,001
95
TransAlta Energy Marketing (US), Inc. (PURCHASED POWER SUPPLY)
18,900
789,380
789,380
96
Turnbull Hydro, LLC (PURCHASED POWER SUPPLY)
24,416
1,715,234
1,715,234
97
Western Area Power Administation (PURCHASED POWER SUPPLY)
37,302
867,441
867,441
98
Guzman Energy, LLC (PURCHASED POWER SUPPLY)
22,382
3,248,067
3,248,067
99
Dynasty Power, Inc. (PURCHASED POWER SUPPLY)
1,004
59,172
59,172
100
Heartland Generation Ltd (PURCHASED POWER SUPPLY)
41
2,622
2,622
101
California Independent System Operator - EIM Transmission (PURCHASED POWER SUPPLY)
0
3,813,226
3,813,226
102
California Independent System Operator - EIM Supply (PURCHASED POWER SUPPLY)
0
5,349,414
5,349,414
103
Estimate Energy (PURCHASED POWER SUPPLY)
0
5,045,005
5,045,005
104
SOUTH DAKOTA PURCHASES
105
WAPA (Various) (SOUTH DAKOTA PURCHASES)
0
113,950
113,950
106
Lincoln Energy Services (SOUTH DAKOTA PURCHASES)
240,000
240,000
107
Southwest Power Pool (SOUTH DAKOTA PURCHASES)
324,906
17,823,642
17,823,642
108
Titan Wind (PPA Wind #1) (SOUTH DAKOTA PURCHASES)
89,527
6,228,757
6,228,757
109
Oak Tree (PPA Wind #2) (SOUTH DAKOTA PURCHASES)
71,738
3,675,277
3,675,277
110
Aurora Wind (SOUTH DAKOTA PURCHASES)
82,314
2,221,874
2,221,874
111
Brule Wind (SOUTH DAKOTA PURCHASES)
81,619
2,199,241
2,199,241
112
Codington Clark Electric (SOUTH DAKOTA PURCHASES)
10,894
10,894
113
MidAmerican Energy (SOUTH DAKOTA PURCHASES)
30,109
30,109
114
Rounding
2
15 TOTAL
4,283,792
0
32,615
35,746
240,000
257,628,265
227,773
257,640,492


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: OtherChargesOfPurchasedPower
Annual capacity and energy adjustment.
(b) Concept: OtherChargesOfPurchasedPower
Annual capacity and energy adjustment.
(c) Concept: OtherChargesOfPurchasedPower
Annual capacity and energy adjustment.
(d) Concept: OtherChargesOfPurchasedPower
Annual capacity and energy adjustment.
(e) Concept: OtherChargesOfPurchasedPower
Annual capacity and energy adjustment.
(f) Concept: OtherChargesOfPurchasedPower
Annual capacity and energy adjustment.
(g) Concept: OtherChargesOfPurchasedPower
Annual capacity and energy adjustment.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
TRANSMISSION OF ELECTRICITY FOR OTHERS (Account 456.1) (Including transactions referred to as "wheeling")
  1. Report all transmission of electricity, i.e., wheeling, provided for other electric utilities, cooperatives, other public authorities, qualifying facilities, non-traditional utility suppliers and ultimate customers for the quarter.
  2. Use a separate line of data for each distinct type of transmission service involving the entities listed in column (a), (b) and (c).
  3. Report in column (a) the company or public authority that paid for the transmission service. Report in column (b) the company or public authority that the energy was received from and in column (c) the company or public authority that the energy was delivered to. Provide the full name of each company or public authority. Do not abbreviate or truncate name or use acronyms. Explain in a footnote any ownership interest in or affiliation the respondent has with the entities listed in columns (a), (b) or (c).
  4. In column (d) enter a Statistical Classification code based on the original contractual terms and conditions of the service as follows: FNO - Firm Network Service for Others, FNS - Firm Network Transmission Service for Self, LFP - "Long-Term Firm Point to Point Transmission Service, OLF - Other Long-Term Firm Transmission Service, SFP - Short-Term Firm Point to Point Transmission Reservation, NF - non-firm transmission service, OS - Other Transmission Service and AD - Out-of-Period Adjustments. Use this code for any accounting adjustments or "true-ups" for service provided in prior reporting periods. Provide an explanation in a footnote for each adjustment. See General Instruction for definitions of codes.
  5. In column (e), identify the FERC Rate Schedule or Tariff Number, On separate lines, list all FERC rate schedules or contract designations under which service, as identified in column (d), is provided.
  6. Report receipt and delivery locations for all single contract path, "point to point" transmission service. In column (f), report the designation for the substation, or other appropriate identification for where energy was received as specified in the contract. In column (g) report the designation for the substation, or other appropriate identification for where energy was delivered as specified in the contract.
  7. Report in column (h) the number of megawatts of billing demand that is specified in the firm transmission service contract. Demand reported in column (h) must be in megawatts. Footnote any demand not stated on a megawatts basis and explain.
  8. Report in column (i) and (j) the total megawatthours received and delivered.
  9. In column (k) through (n), report the revenue amounts as shown on bills or vouchers. In column (k), provide revenues from demand charges related to the billing demand reported in column (h). In column (I), provide revenues from energy charges related to the amount of energy transferred. In column (m), provide the total revenues from all other charges on bills or vouchers rendered, including out of period adjustments. Explain in a footnote all components of the amount shown in column (m). Report in column (n) the total charge shown on bills rendered to the entity Listed in column (a). If no monetary settlement was made, enter zero (0) in column (n). Provide a footnote explaining the nature of the non-monetary settlement, including the amount and type of energy or service rendered.
  10. The total amounts in columns (i) and (j) must be reported as Transmission Received and Transmission Delivered for annual report purposes only on Page 401, Lines 16 and 17, respectively.
  11. Footnote entries and provide explanations following all required data.
TRANSFER OF ENERGY REVENUE FROM TRANSMISSION OF ELECTRICITY FOR OTHERS
Line No.
PaymentByCompanyOrPublicAuthority
Payment By (Company of Public Authority) (Footnote Affiliation)
(a)
TransmissionEnergyReceivedFromCompanyOrPublicAuthorityName
Energy Received From (Company of Public Authority) (Footnote Affiliation)
(b)
TransmissionEnergyDeliveredToCompanyOrPublicAuthorityName
Energy Delivered To (Company of Public Authority) (Footnote Affiliation)
(c)
StatisticalClassificationCode
Statistical Classification
(d)
RateScheduleTariffNumber
Ferc Rate Schedule of Tariff Number
(e)
TransmissionPointOfReceipt
Point of Receipt (Substation or Other Designation)
(f)
TransmissionPointOfDelivery
Point of Delivery (Substation or Other Designation)
(g)
BillingDemand
Billing Demand (MW)
(h)
TransmissionOfElectricityForOthersEnergyReceived
Megawatt Hours Received
(i)
TransmissionOfElectricityForOthersEnergyDelivered
Megawatt Hours Delivered
(j)
Demand Charges ($)
(k)
Energy Charges ($)
(l)
Other Charges ($)
(m)
RevenuesFromTransmissionOfElectricityForOthers
Total Revenues ($) (k+l+m)
(n)
1
MONTANA CHOICE TRANSMISSION
2
Ash Grove Cement
Energy Keepers Inc.
Ash Grove Cement
Kerr
Clancy, MT
7
38,898
38,898
205,568
205,568
3
Aspen Air U.S., LLC
Talen Energy
Aspen Air Corporation
Colstrip
Billings, MT
11
48,919
48,919
241,880
241,880
4
Barretts Minerals, Inc.
Energy Keepers inc.
Barretts Minerals, Inc.
Kerr
Dillon, MT
6
30,912
30,912
177,805
177,805
5
Beartooth Electric Cooperative, Inc.
WAPA
Beartooth Electric Cooperative, Inc.
Fort Peck
Various in Montana
18
83,187
83,187
653,587
653,587
6
Benefis Health Systems
Energy Keepers inc.
Benefis Health Systems
Kerr
Various in Montana
7
35,294
35,294
237,767
237,767
7
Big Horn County Electric Coop. Inc.
WAPA
Big Horn County Electric Coop. Inc.
Various & Great Falls
Various in Montana
18
72,042
72,042
564,300
564,300
8
Bonneville Power Administration
BPA
Bonneville Power Administration
BPAT.NWMT
Various in Montana
185
873,611
873,611
6,519,426
6,519,426
9
Basin Electric Power Cooperative
Morgan Stanley, Talen & WAPA
Basin Electric Power Cooperative
Various in Montana
Various NWMT & WAUW
181
865,118
865,118
6,156,369
6,156,369
10
Basin Electric Power Cooperative
Basin Electric & WAPA
Basin Electric Power Cooperative
Crossover
Various NWMT & WAUW
15
76,610
76,610
554,088
554,088
11
CHS, Inc.
Morgan Stanley
CHS, Inc.
MATL.NWMT
Various in Montana
58
348,302
348,302
2,028,975
2,028,975
12
City of Great Falls
Energy Keepers Inc.
City of Great Falls
Kerr
Various in Montana
6
22,259
22,259
133,101
133,101
13
Talen Montana, LLC
Avista Energy
Colstrip Steam Electric Station
Colstrip
Nichols Pump Sub
10
29,548
29,548
172,573
172,573
14
Atlas Power, LLC
Tenaska
Atlas Power, LLC
BPAT.NWMT
Butte, MT
75
165,045
165,045
939,377
939,377
15
Phillips 66 Company
Shell Energy
Phillips 66 Company
BPAT.NWMT
Various in Montana
70
477,329
477,329
2,798,577
2,798,577
16
ExxonMobil Corporation
Talen Energy
ExxonMobil Corporation
Colstrip
Billings, MT
35
244,051
244,051
1,431,297
1,431,297
17
General Mills Operations, LLC
Talen Energy
General Mills Operations, LLC
Colstrip
Great Falls, MT
4
19,002
19,002
110,465
110,465
18
Great Falls Public Schools
Energy Keepers Inc.
Great Falls Public Schools
Kerr
Great Falls, MT
3
9,634
9,634
64,023
64,023
19
GCC Three Forks, LLC
Energy Keepers Inc.
GCC Three Forks, LLC
Kerr
Three Forks, MT
8
41,971
41,971
224,731
224,731
20
Imerys Talc America, Inc.
Energy Keepers Inc.
Imerys Talc America, Inc.
Kerr
Three Forks, MT
6
7,027
7,027
37,118
37,118
21
Magris Talc USA, Inc.
Energy Keepers Inc.
Imerys Talc America, Inc.
Kerr
Three Forks, MT
6
22,169
22,169
155,567
155,567
22
Suiza Dairy Group, LLC
Talen Energy
Suiza Dairy Group, LLC
Colstrip
Various in Montana
2
6,362
6,362
40,605
40,605
23
Calumet Refining, LLC
Talen Energy
Calumet Montana Refining Company, Inc.
Colstrip
Great Falls, MT
25
112,864
112,864
647,283
647,283
24
Montana Resources
Talen Energy & Energy Keepers, Inc.
Montana Resources
Colstrip & Kerr
Butte, MT
50
371,368
371,368
2,166,664
2,166,664
25
REC Silicon Company
Morgan Stanley
REC Silicon Company
Hardin
Butte, MT
117
551,293
551,293
2,891,075
2,891,075
26
Roseburg Forest Products Company
Talen Energy
Roseburg Forest Products Company
Colstrip
Missoula, MT
8
50,404
50,404
315,350
315,350
27
Sibanye-Stillwater
Energy Keepers Inc.
Stillwater Mining Company
Kerr
Various in Montana
46
286,308
286,308
1,601,053
1,601,053
28
Town of Philipsburg
Town of Philipsburg
Town of Philipsburg
Philipsburg Substation
Philipsburg, MT
0
657
657
4,607
4,607
29
Western Area Power Administration
WAPA
Western Area Power Administration
Crossover
Various NWMT & WAUW
4
8
8
31,830
31,830
30
Montana State University - Bozeman
WAPA
Montana State University - Bozeman
Fort Peck West
Great Falls, MT
4
15,270
15,270
96,816
96,816
31
Western Area Power Administration
WAPA
Malmstrom Air Force Base
Fort Peck West
Great Falls, MT
4
8,868
8,868
52,369
52,369
32
MONTANA POINT-TO-POINT
33
Avista Corporation
AVISTA
AVISTA
COLSTRIP
AVAT.NMWT
0
24,173
24,173
141,705
141,705
34
Avista Corporation
AVISTA
AVISTA
COLSTRIP
AVAT.NMWT
0
106,978
106,978
620,407
620,407
35
Avista Corporation
AVISTA
NWMT
AVAT.NWMT
COLSTRIP
0
208
208
1,218
1,218
36
Avista Corporation
AVISTA
NWMT
AVAT.NWMT
NWMT.SYSTEM
0
593
593
3,390
3,390
37
Avista Corporation
AVISTA
NWMT
AVAT.NWMT
NWMT.SYSTEM
0
840
840
4,550
4,550
38
Avista Corporation
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
384
384
2,143
2,143
39
Avista Corporation
NWMT
BPA
COLSTRIP
BPAT.NWMT
0
2,323
2,323
13,659
13,659
40
Avista Corporation
NWMT
NWMT
COLSTRIP
COLSTRIP
0
480
480
2,820
2,820
41
Avista Corporation
NWMT
Pacificorp
COLSTRIP
BRDY
0
680
680
3,998
3,998
42
Basin Electric Power Cooperative
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
223
223
1,244
1,244
43
Basin Electric Power Cooperative
AVISTA
WAPA
AVAT.NWMT
GREATFALLS
0
66
66
388
388
44
Basin Electric Power Cooperative
BPA
Pacificorp
BPAT.NWMT
YTP
0
1,544
1,544
9,024
9,024
45
Basin Electric Power Cooperative
BPA
WAPA
BPAT.NWMT
GREATFALLS
0
96
96
536
536
46
Basin Electric Power Cooperative
NWMT
Pacificorp
BGI
YTP
0
1,459
1,459
8,579
8,579
47
Basin Electric Power Cooperative
NWMT
Pacificorp
COLSTRIP
YTP
0
2,073
2,073
11,926
11,926
48
Basin Electric Power Cooperative
NWMT
Pacificorp
HOLTER
YTP
0
200
200
1,176
1,176
49
Basin Electric Power Cooperative
NWMT
Pacificorp
TFALLS
YTP
0
200
200
1,176
1,176
50
Basin Electric Power Cooperative
NWMT
WAPA
COLSTRIP
GREATFALLS
0
97
97
548
548
51
Basin Electric Power Cooperative
NWMT
WAPA
TFALLS
GREATFALLS
0
4
4
22
22
52
Basin Electric Power Cooperative
Pacificorp
AVISTA
BRDY
AVAT.NWMT
0
6
6
33
33
53
Basin Electric Power Cooperative
Pacificorp
BPA
BRDY
BPAT.NWMT
0
10
10
56
56
54
Basin Electric Power Cooperative
Pacificorp
NWMT
BRDY
NWMT.SYSTEM
0
45
45
251
251
55
Basin Electric Power Cooperative
Pacificorp
NWMT
YTP
NWMT.SYSTEM
0
2,280
2,280
13,340
13,340
56
Basin Electric Power Cooperative
Pacificorp
NWMT
YTP
NWMT.SYSTEM
0
1,104
1,104
6,486
6,486
57
Basin Electric Power Cooperative
Pacificorp
Pacificorp
BRDY
MLCK
0
2
2
11
11
58
Basin Electric Power Cooperative
Pacificorp
Pacificorp
COLSTRIP
GREATFALLS
0
1,132
1,132
6,317
6,317
59
Basin Electric Power Cooperative
Pacificorp
WAPA
BRDY
GREATFALLS
0
283
283
1,579
1,579
60
Basin Electric Power Cooperative
Pacificorp
WAPA
YTP
CROSSOVER
0
2,170
2,170
12,568
12,568
61
Basin Electric Power Cooperative
Pacificorp
WAPA
YTP
GREATFALLS
0
5,360
5,360
30,584
30,584
62
Basin Electric Power Cooperative
Pacificorp
WAPA
YTP
CROSSOVER
0
480
480
2,600
2,600
63
Basin Electric Power Cooperative
WAPA
NWMT
CROSSOVER
NWMT.SYSTEM
0
1,536
1,536
9,024
9,024
64
Basin Electric Power Cooperative
WAPA
Pacificorp
CROSSOVER
YTP
0
60
60
351
351
65
Basin Electric Power Cooperative
WAPA
WAPA
CROSSOVER
GREATFALLS
31
271,560
271,560
1,556,996
1,556,996
66
Basin Electric Power Cooperative
WAPA
WAPA
CROSSOVER
GREATFALLS
0
658
658
3,830
3,830
67
Basin Electric Power Cooperative
WAPA
WAPA
CROSSOVER
GREATFALLS
0
360
360
2,115
2,115
68
Black Hills Power Inc
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
1,220
1,220
6,814
6,814
69
Black Hills Power Inc
BPA
Pacificorp
BPAT.NWMT
YTP
0
109
109
632
632
70
Black Hills Power Inc
Colstrip Partners
Pacificorp
COLSTRIP
YTP
0
1,176
1,176
6,687
6,687
71
Black Hills Power Inc
Pacificorp
BPA
YTP
BPAT.NWMT
0
430
430
2,528
2,528
72
Bonneville Power Administration
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
46,624
46,624
273,566
273,566
73
Bonneville Power Administration
BPA
Pacificorp
BPAT.NWMT
YTP
0
6
6
35
35
74
Bonneville Power Administration
BPA
WAPA
BPAT.NWMT
GREATFALLS
0
3,650
3,650
21,043
21,043
75
Brookfield Energy Marketing LP
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
1
1
6
6
76
Brookfield Energy Marketing LP
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
259
259
1,523
1,523
77
Brookfield Energy Marketing LP
NWMT
Pacificorp
KERR
BRDY
0
40
40
223
223
78
Brookfield Energy Marketing LP
NWMT
WAPA
COLSTRIP
CROSSOVER
0
25
25
147
147
79
Brookfield Energy Marketing LP
Pacificorp
BPA
YTP
BPAT.NWMT
0
154
154
906
906
80
Brookfield Energy Marketing LP
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
10
10
56
56
81
Capital Power Energy Marketing, Inc.
BPA
MATL
BPAT.NWMT
MATL.NWMT
0
630
630
3,704
3,704
82
Capital Power Energy Marketing, Inc.
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
35
35
206
206
83
Capital Power Energy Marketing, Inc.
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
2,127
2,127
11,876
11,876
84
Capital Power Energy Marketing, Inc.
MATL
BPAT
MATL.NWMT
BPAT.NWMT
0
2,196
2,196
12,875
12,875
85
Capital Power Energy Marketing, Inc.
MATL
Pacificorp
MATL.NWMT
YTP
0
3,092
3,092
17,253
17,253
86
Capital Power Energy Marketing, Inc.
MATL
WAPA
MATL.NWMT
NWMT.SYSTEM
0
1,558
1,558
8,694
8,694
87
Capital Power Energy Marketing, Inc.
Pacificorp
BPAT
YTP
BPAT.NWMT
0
30
30
176
176
88
Capital Power Energy Marketing, Inc.
WAPA
BPAT
CROSSOVER
BPAT.NWMT
0
675
675
3,767
3,767
89
Capital Power Energy Marketing, Inc.
WAPA
NWMT
CROSSOVER
NWMT.SYSTEM
0
125
125
698
698
90
Capital Power Energy Marketing, Inc.
WAPA
Pacificorp
CROSSOVER
YTP
0
120
120
706
706
91
Cycle Power Partners LLC
NWMT
Pacificorp
HORSESHOE
BRDY
0
1,329
1,329
7,473
7,473
92
Cycle Power Partners LLC
NWMT
Pacificorp
HORSESHOE
JEFF
0
22,008
22,008
126,540
126,540
93
Dynasty Power Inc.
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
165
165
970
970
94
Dynasty Power Inc.
AVISTA
WAPA
AVAT.NWMT
CROSSOVER
0
318
318
1,870
1,870
95
Dynasty Power Inc.
BPA
NWMT
BPAT.NWMT
MATL.NWMT
0
405
405
2,381
2,381
96
Dynasty Power Inc.
BPA
Pacificorp
BPAT.NWMT
JEFF
0
415
415
2,440
2,440
97
Dynasty Power Inc.
BPA
Pacificorp
BPAT.NWMT
MLCK
0
31
31
182
182
98
Dynasty Power Inc.
BPA
Pacificorp
BPAT.NWMT
YTP
0
1,477
1,477
8,682
8,682
99
Dynasty Power Inc.
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
1,901
1,901
11,178
11,178
100
Dynasty Power Inc.
NWMT
BPAT
MATL.NWMT
BPAT.NWMT
0
200
200
1,176
1,176
101
Dynasty Power Inc.
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
678
678
3,987
3,987
102
Dynasty Power Inc.
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
2,829
2,829
16,622
16,622
103
Dynasty Power Inc.
Pacificorp
BPA
BRDY
BPAT.NWMT
0
155
155
911
911
104
Dynasty Power Inc.
Pacificorp
BPA
YTP
BPAT.NWMT
0
13,976
13,976
82,078
82,078
105
Dynasty Power Inc.
Pacificorp
BPA
YTP
BPAT.NWMT
0
3,552
3,552
20,868
20,868
106
Dynasty Power Inc.
Pacificorp
NWMT
BRDY
MATL.NWMT
0
522
522
3,069
3,069
107
Dynasty Power Inc.
Pacificorp
Pacificorp
YTP
BRDY
0
1,425
1,425
8,379
8,379
108
Dynasty Power Inc.
Pacificorp
Pacificorp
YTP
JEFF
0
138
138
811
811
109
Dynasty Power Inc.
Pacificorp
WAPA
YTP
CROSSOVER
0
98
98
576
576
110
Dynasty Power Inc.
WAPA
AVISTA
CROSSOVER
AVAT.NWMT
0
919
919
5,404
5,404
111
Dynasty Power Inc.
WAPA
AVISTA
CROSSOVER
AVAT.NWMT
0
1,800
1,800
10,575
10,575
112
Dynasty Power Inc.
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
887
887
5,186
5,186
113
Dynasty Power Inc.
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
1,128
1,128
6,627
6,627
114
Dynasty Power Inc.
WAPA
NWMT
CROSSOVER
NWMT.SYSTEM
0
50
50
294
294
115
Dynasty Power Inc.
WAPA
Pacificorp
CROSSOVER
YTP
0
49
49
288
288
116
EDF Trading North America, LLC
AVISTA
AVISTA
COLSTRIP
AVAT.NWMT
0
1,246
1,246
7,326
7,326
117
EDF Trading North America, LLC
AVISTA
BPA
AVAT,NWMT
BPAT.NWMT
0
9
9
53
53
118
EDF Trading North America, LLC
AVISTA
NWMT
AVAT,NWMT
COLSTRIP
0
934
934
5,492
5,492
119
EDF Trading North America, LLC
AVISTA
NWMT
AVAT,NWMT
GTFALLSNWMT
0
42
42
247
247
120
EDF Trading North America, LLC
AVISTA
NWMT
AVAT,NWMT
NWMT.SYSTEM
0
641
641
3,769
3,769
121
EDF Trading North America, LLC
AVISTA
Pacificorp
AVAT,NWMT
YTP
0
219,600
219,600
1,282,500
1,282,500
122
EDF Trading North America, LLC
BPA
NWMT
BPAT.NWMT
COLSTRIP
0
1,583
1,583
9,226
9,226
123
EDF Trading North America, LLC
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
5,040
5,040
27,300
27,300
124
EDF Trading North America, LLC
BPA
Pacificorp
BPAT.NWMT
BRDY
0
25
25
147
147
125
EDF Trading North America, LLC
BPA
Pacificorp
BPAT.NWMT
YTP
0
250
250
1,395
1,395
126
EDF Trading North America, LLC
NWMT
BPAT
COLSTRIP
BPAT.NWMT
0
15,098
15,098
88,006
88,006
127
EDF Trading North America, LLC
NWMT
AVISTA
COLSTRIP
AVAT.NWMT
0
240
240
1,399
1,399
128
EDF Trading North America, LLC
NWMT
MATL.NWMT
COLSTRIP
MATL.NWMT
0
470
470
2,764
2,764
129
EDF Trading North America, LLC
NWMT
MATL.NWMT
JUDITHGAP
MATL.NWMT
0
50
50
279
279
130
EDF Trading North America, LLC
NWMT
NWMT
COLSTRIP
COLSTRIP
0
884
884
5,031
5,031
131
EDF Trading North America, LLC
NWMT
Pacificorp
COLSTRIP
BRDY
0
35
35
195
195
132
EDF Trading North America, LLC
NWMT
Pacificorp
COLSTRIP
YTP
0
714
714
4,088
4,088
133
EDF Trading North America, LLC
NWMT
Pacificorp
COLSTRIP
YTP
0
91,800
91,800
529,000
529,000
134
EDF Trading North America, LLC
NWMT
WAPA
COLSTRIP
CROSSOVER
0
586
586
3,357
3,357
135
EDF Trading North America, LLC
Pacificcorp
MATL.NWMT
YTP
MATL.NWMT
0
200
200
1,116
1,116
136
EDF Trading North America, LLC
Pacificcorp
NWMT
BRDY
COLSTRIP
0
63
63
370
370
137
EDF Trading North America, LLC
Pacificcorp
NWMT
YTP
COLSTRIP
0
55
55
323
323
138
EDF Trading North America, LLC
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
200
200
1,116
1,116
139
Energy Keepers, Inc
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
679
679
3,789
3,789
140
Energy Keepers, Inc
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
27,744
27,744
160,464
160,464
141
Energy Keepers, Inc
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
4
4
24
24
142
Energy Keepers, Inc
BPA
Pacificorp
BPAT.NWMT
YTP
0
153,624
153,624
895,350
895,350
143
Energy Keepers, Inc
NWMT
AVA
COLSTRIP
AVAT.NWMT
0
384
384
2,256
2,256
144
Energy Keepers, Inc
NWMT
BPA
KERR
BPAT.NWMT
40
350,400
350,400
2,009,027
2,009,027
145
Energy Keepers, Inc
NWMT
BPA
COLSTRIP
BPAT.NWMT
0
332
332
1,952
1,952
146
Energy Keepers, Inc
NWMT
BPA
KERR
BPAT.NWMT
0
24
24
141
141
147
Energy Keepers, Inc
NWMT
BPA
KERR
BPAT.NWMT
12
105,120
105,120
265,655
265,655
148
Energy Keepers, Inc
NWMT
BPA
KERR
BPAT.NWMT
0
2,472
2,472
14,020
14,020
149
Energy Keepers, Inc
NWMT
Pacificorp
KERR
BRDY
25
108,625
108,625
614,467
614,467
150
Energy Keepers, Inc
NWMT
Pacificorp
COLSTRIP
BRDY
0
1,171
1,171
6,885
6,885
151
Energy Keepers, Inc
NWMT
Pacificorp
KERR
BRDY
0
120
120
706
706
152
Energy Keepers, Inc
NWMT
Pacificorp
KERR
YTP
0
1,610
1,610
8,984
8,984
153
Energy Keepers, Inc
NWMT
Pacificorp
KERR
BRDY
0
8,280
8,280
48,588
48,588
154
Energy Keepers, Inc
NWMT
Pacificorp
KERR
YTP
0
3,600
3,600
19,500
19,500
155
Energy Keepers, Inc
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
1,860
1,860
10,183
10,183
156
Energy Keepers, Inc
Pacificorp
BPA
YTP
BPAT.NWMT
0
1,020
1,020
5,692
5,692
157
Energy Keepers, Inc
Pacificorp
BPA
YTP
BPAT.NWMT
0
24,829
24,829
145,156
145,156
158
Guzman Energy, LLC
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
2,005
2,005
11,715
11,715
159
Guzman Energy, LLC
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
178,272
178,272
1,028,390
1,028,390
160
Guzman Energy, LLC
BPA
Pacificorp
BPAT.NWMT
BRDY
0
25
25
147
147
161
Guzman Energy, LLC
BPA
Pacificorp
BPAT.NWMT
YTP
0
2,010
2,010
11,582
11,582
162
Guzman Energy, LLC
BPA
Pacificorp
BPAT.NWMT
YTP
0
1,800
1,800
10,025
10,025
163
Guzman Energy, LLC
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
2
2
11
11
164
Guzman Energy, LLC
NWMT
AVISTA
KERR
AVAT.NWMT
0
84
84
494
494
165
Guzman Energy, LLC
Pacificorp
AVISTA
BRDY
AVAT.NWMT
0
330
330
1,841
1,841
166
Guzman Energy, LLC
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
2,159
2,159
12,548
12,548
167
Guzman Energy, LLC
Pacificorp
AVISTA
BRDY
AVAT.NWMT
0
5,950
5,950
35,214
35,214
168
Guzman Energy, LLC
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
37,359
37,359
219,252
219,252
169
Guzman Energy, LLC
Pacificorp
BPA
YTP
BPAT.NWMT
0
9,202
9,202
53,015
53,015
170
Guzman Energy, LLC
Pacificorp
BPA
YTP
BPAT.NWMT
0
30,070
30,070
177,439
177,439
171
Guzman Energy, LLC
Pacificorp
Pacificorp
YTP
BRDY
0
747
747
4,302
4,302
172
Guzman Energy, LLC
Pacificorp
Pacificorp
YTP
JEFF
0
186
186
1,094
1,094
173
Guzman Energy, LLC
Pacificorp
WAPA
YTP
CROSSOVER
0
12
12
71
71
174
Guzman Energy, LLC
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
1
1
6
6
175
Guzman Energy, LLC
WAPA
Pacificorp
CROSSOVER
BRDY
0
75
75
441
441
176
Guzman Energy, LLC
WAPA
Pacificorp
CROSSOVER
YTP
0
150
150
882
882
177
Idaho Power Company
AVISTA
Pacificorp
AVAT.NWMT
JEFF
0
750
750
4,406
4,406
178
Idaho Power Company
AVISTA
Pacificorp
AVAT.NWMT
BRDY
0
10,318
10,318
60,624
60,624
179
Idaho Power Company
NWMT
Idaho
KERR
TNDY
0
312
312
1,833
1,833
180
Idaho Power Company
Pacificorp
Idaho
JEFF
PTSN
0
10
10
181
Idaho Power Company
Pacificorp
Idaho
JEFF
TNDY
0
793
793
4,602
4,602
182
Idaho Power Company
Pacificorp
Idaho
JEFF
PTSN
0
240
240
1,410
1,410
183
Idaho Power Company
Pacificorp
Idaho
JEFF
TNDY
0
10,300
10,300
59,670
59,670
184
Idaho Power Company
Pacificorp
NWMT
JEFF
MLCK
0
11
11
65
65
185
Macquarie Energy LLC
AVISTA
MATL
AVAT.NWMT
MATL.NWMT
0
50
50
279
279
186
Macquarie Energy LLC
AVISTA
Pacificorp
AVAT.NWMT
JEFF
0
246
246
1,446
1,446
187
Macquarie Energy LLC
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
419
419
2,338
2,338
188
Macquarie Energy LLC
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
8,640
8,640
46,800
46,800
189
Macquarie Energy LLC
AVISTA
WAPA
AVAT.NWMT
CROSSOVER
0
120
120
670
670
190
Macquarie Energy LLC
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
74,400
74,400
427,500
427,500
191
Macquarie Energy LLC
BPA
Pacificorp
BPAT.NWMT
JEFF
0
3,333
3,333
19,598
19,598
192
Macquarie Energy LLC
BPA
Pacificorp
BPAT.NWMT
MLCK
0
12
12
67
67
193
Macquarie Energy LLC
BPA
Pacificorp
BPAT.NWMT
YTP
0
678
678
3,783
3,783
194
Macquarie Energy LLC
BPA
Pacificorp
BPAT.NWMT
JEFF
0
265,416
265,416
1,528,480
1,528,480
195
Macquarie Energy LLC
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
3,476
3,476
19,896
19,896
196
Macquarie Energy LLC
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
2,424
2,424
13,130
13,130
197
Macquarie Energy LLC
NWMT
AVISTA
MATL.NWMT
AVAT.NWMT
0
219
219
1,288
1,288
198
Macquarie Energy LLC
NWMT
AVISTA
MATL.NWMT
AVAT.NWMT
0
1,680
1,680
9,870
9,870
199
Macquarie Energy LLC
NWMT
BPA
BGI
BPAT.NWMT
0
972
972
5,439
5,439
200
Macquarie Energy LLC
NWMT
BPA
CANYONFERRY
BPAT.NWMT
0
2,076
2,076
11,561
11,561
201
Macquarie Energy LLC
NWMT
BPA
COLSTRIP
BPAT.NWMT
0
400
400
2,352
2,352
202
Macquarie Energy LLC
NWMT
BPA
HOLTER
BPAT.NWMT
0
120
120
670
670
203
Macquarie Energy LLC
NWMT
BPA
JUDITHGAP
BPAT.NWMT
0
400
400
2,352
2,352
204
Macquarie Energy LLC
NWMT
BPA
MATL.NWMT
BPAT.NWMT
0
728
728
4,281
4,281
205
Macquarie Energy LLC
NWMT
BPA
MT1
BPAT.NWMT
0
744
744
4,152
4,152
206
Macquarie Energy LLC
NWMT
BPA
TFALLS
BPAT.NWMT
0
1,747
1,747
10,119
10,119
207
Macquarie Energy LLC
NWMT
BPA
CANYONFERRY
BPAT.NWMT
0
11,232
11,232
60,840
60,840
208
Macquarie Energy LLC
NWMT
BPA
COLSTRIP
BPAT.NWMT
0
576
576
3,384
3,384
209
Macquarie Energy LLC
NWMT
BPA
MATL.NWMT
BPAT.NWMT
0
11,760
11,760
69,090
69,090
210
Macquarie Energy LLC
NWMT
BPA
MT1
BPAT.NWMT
0
600
600
3,250
3,250
211
Macquarie Energy LLC
NWMT
BPA
TFALLS
BPAT.NWMT
0
1,272
1,272
7,440
7,440
212
Macquarie Energy LLC
NWMT
MATL
MATL.NWMT
CROSSOVER
0
56
56
312
312
213
Macquarie Energy LLC
NWMT
Pacificorp
BGI
BRDY
0
609
609
3,525
3,525
214
Macquarie Energy LLC
NWMT
Pacificorp
BGI
JEFF
0
1,871
1,871
10,807
10,807
215
Macquarie Energy LLC
NWMT
Pacificorp
BGI
YTP
0
449
449
2,505
2,505
216
Macquarie Energy LLC
NWMT
Pacificorp
CANYONFERRY
BRDY
0
314
314
1,752
1,752
217
Macquarie Energy LLC
NWMT
Pacificorp
CANYONFERRY
JEFF
0
616
616
3,437
3,437
218
Macquarie Energy LLC
NWMT
Pacificorp
CANYONFERRY
YTP
0
256
256
1,428
1,428
219
Macquarie Energy LLC
NWMT
Pacificorp
COLSTRIP
BRDY
0
8
8
47
47
220
Macquarie Energy LLC
NWMT
Pacificorp
COLSTRIP
JEFF
0
3,337
3,337
19,612
19,612
221
Macquarie Energy LLC
NWMT
Pacificorp
HOLTER
JEFF
0
160
160
893
893
222
Macquarie Energy LLC
NWMT
Pacificorp
JUDITHGAP
JEFF
0
360
360
2,117
2,117
223
Macquarie Energy LLC
NWMT
Pacificorp
MATL.NWMT
JEFF
0
560
560
3,293
3,293
224
Macquarie Energy LLC
NWMT
Pacificorp
MATL.NWMT
YTP
0
200
200
1,176
1,176
225
Macquarie Energy LLC
NWMT
Pacificorp
STILLWIND
JEFF
0
280
280
1,646
1,646
226
Macquarie Energy LLC
NWMT
Pacificorp
TFALLS
BRDY
0
56
56
329
329
227
Macquarie Energy LLC
NWMT
Pacificorp
TFALLS
JEFF
0
1,509
1,509
8,470
8,470
228
Macquarie Energy LLC
NWMT
Pacificorp
BGI
JEFF
0
288
288
1,560
1,560
229
Macquarie Energy LLC
NWMT
Pacificorp
CANYONFERRY
BRDY
0
312
312
1,690
1,690
230
Macquarie Energy LLC
NWMT
Pacificorp
CANYONFERRY
JEFF
0
1,776
1,776
9,620
9,620
231
Macquarie Energy LLC
NWMT
Pacificorp
COLSTRIP
JEFF
0
96
96
564
564
232
Macquarie Energy LLC
NWMT
Pacificorp
TFALLS
JEFF
0
3,096
3,096
16,770
16,770
233
Macquarie Energy LLC
NWMT
WAPA
CANYONFERRY
CROSSOVER
0
1,472
1,472
8,214
8,214
234
Macquarie Energy LLC
NWMT
WAPA
COLSTRIP
CROSSOVER
0
2,400
2,400
14,100
14,100
235
Macquarie Energy LLC
NWMT
WAPA
COLSTRIP
CROSSOVER
0
1,800
1,800
10,575
10,575
236
Macquarie Energy LLC
Pacifcorp
NWMT
YTP
MATL.NWMT
0
25
25
147
147
237
Macquarie Energy LLC
Pacifcorp
Pacificorp
YTP
JEFF
0
930
930
5,467
5,467
238
Macquarie Energy LLC
Pacifcorp
WAPA
YTP
CROSSOVER
0
688
688
4,045
4,045
239
Macquarie Energy LLC
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
637
637
3,746
3,746
240
Macquarie Energy LLC
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
768
768
4,512
4,512
241
Macquarie Energy LLC
Pacificorp
BPA
YTP
BPAT.NWMT
0
4,581
4,581
26,917
26,917
242
Macquarie Energy LLC
Pacificorp
BPA
YTP
BPAT.NWMT
0
1,296
1,296
7,460
7,460
243
Macquarie Energy LLC
Pacificorp
Pacificorp
YTP
BRDY
0
66
66
368
368
244
Macquarie Energy LLC
Pacificorp
WAPA
BRDY
CROSSOVER
0
1,368
1,368
8,037
8,037
245
Macquarie Energy LLC
WAPA
AVISTA
CROSSOVER
AVAT.NWMT
0
150
150
882
882
246
Macquarie Energy LLC
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
7,390
7,390
43,131
43,131
247
Macquarie Energy LLC
WAPA
MATL
CROSSOVER
MATL.NWMT
0
5
5
28
28
248
Macquarie Energy LLC
WAPA
NWMT
CROSSOVER
COLSTRIP
0
250
250
1,470
1,470
249
Macquarie Energy LLC
WAPA
Pacificorp
CROSSOVER
YTP
0
839
839
4,933
4,933
250
MAG Energy Solutions
BPAT
WAPA
BPAT.NWM T
CROSSOVER
0
2,104
2,104
11,740
11,740
251
MAG Energy Solutions
NWMT
MATL
MATL.NWMT
BPAT.NWMT
0
294
294
1,729
1,729
252
MAG Energy Solutions
NWMT
Pacificorp
MATL.NWMT
JEFF
0
154
154
906
906
253
MAG Energy Solutions
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
243
243
1,429
1,429
254
MAG Energy Solutions
Pacificorp
MATL
JEFF
MATL.NWMT
0
51
51
293
293
255
MAG Energy Solutions
Pacificorp
Pacificorp
YTP
JEFF
0
54
54
318
318
256
MAG Energy Solutions
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
75
75
441
441
257
MAG Energy Solutions
WAPA
MATL
CROSSOVER
MATL.NWMT
0
30
30
176
176
258
MAG Energy Solutions
WAPA
Pacificorp
CROSSOVER
BRDY
0
804
804
4,520
4,520
259
MAG Energy Solutions
WAPA
Pacificorp
CROSSOVER
JEFF
0
429
429
2,523
2,523
260
MAG Energy Solutions
WAPA
Pacificorp
CROSSOVER
YTP
0
369
369
2,170
2,170
261
Mercuria Energy America, LLC
AVISTA
BPA
AVAT.NWMT
BPAT.NWMT
0
480
480
2,820
2,820
262
Mercuria Energy America, LLC
AVISTA
Pacificorp
AVAT.NWMT
BRDY
0
102,480
102,480
598,500
598,500
263
Mercuria Energy America, LLC
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
341
341
2,005
2,005
264
Mercuria Energy America, LLC
NWMT
NWMT
KERR
GTFALLSNWMT
0
72
72
423
423
265
Mercuria Energy America, LLC
NWMT
NWMT
KERR
NWMT.SYSTEM
0
72
72
423
423
266
Mercuria Energy America, LLC
NWMT
Pacificorp
KERR
YTP
0
72
72
423
423
267
Mercuria Energy America, LLC
NWMT
Pacificorp
KERR
YTP
0
648
648
3,807
3,807
268
Mercuria Energy America, LLC
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
3,864
3,864
22,678
22,678
269
Mercuria Energy America, LLC
Pacificorp
BPA
YTP
BPAT.NWMT
0
1,384
1,384
7,987
7,987
270
Mercuria Energy America, LLC
Pacificorp
BPA
YTP
BPAT.NWMT
0
18,600
18,600
108,571
108,571
271
Mercuria Energy America, LLC
Pacificorp
MATL.NWMT
YTP
MATL.NWMT
0
113
113
631
631
272
Mercuria Energy America, LLC
Pacificorp
NWMT
YTP
NWMT.SYSTEM
0
1
1
6
6
273
Mercuria Energy America, LLC
Pacificorp
NWMT
YTP
NWMT.SYSTEM
0
1,560
1,560
9,165
9,165
274
Mercuria Energy America, LLC
Pacificorp
Pacificorp
BRDY
YTP
0
720
720
4,230
4,230
275
Mercuria Energy America, LLC
Pacificorp
Pacificorp
YTP
BRDY
0
36,742
36,742
214,542
214,542
276
Mercuria Energy America, LLC
Pacificorp
WAPA
BRDY
CROSSOVER
0
1,288
1,288
7,011
7,011
277
Mercuria Energy America, LLC
Pacificorp
WAPA
YTP
CROSSOVER
0
42
42
247
247
278
Mercuria Energy America, LLC
Pacificorp
WAPA
BRDY
CROSSOVER
0
1,416
1,416
7,670
7,670
279
Mercuria Energy America, LLC
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
610
610
3,491
3,491
280
Mercuria Energy America, LLC
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
2,016
2,016
11,382
11,382
281
Mercuria Energy America, LLC
WAPA
MATL.NWMT
CROSSOVER
MATL.NWMT
0
257
257
1,434
1,434
282
Mercuria Energy America, LLC
WAPA
Pacificorp
CROSSOVER
BRDY
0
601
601
3,112
3,112
283
Mercuria Energy America, LLC
WAPA
Pacificorp
CROSSOVER
YTP
0
45,882
45,882
268,205
268,205
284
Mercuria Energy America, LLC
WAPA
Pacificorp
CROSSOVER
YTP
0
696
696
4,089
4,089
285
Morgan Stanley Capital  Group
AVISTA
Glacier Wind
AVAT.NWMT
GLWND1
0
49
49
275
275
286
Morgan Stanley Capital  Group
AVISTA
Glacier Wind
AVAT.NWMT
GLWND2
0
6
6
35
35
287
Morgan Stanley Capital  Group
AVISTA
MATL
AVAT.NWMT
MATL.NWMT
0
7,391
7,391
42,972
42,972
288
Morgan Stanley Capital  Group
AVISTA
MATL
AVAT.NWMT
MATL.NWMT
0
196,389
196,389
1,139,025
1,139,025
289
Morgan Stanley Capital  Group
AVISTA
Pacificorp
AVAT.NWMT
JEFF
0
16
16
94
94
290
Morgan Stanley Capital  Group
AVISTA
WAPA
AVAT.NWMT
CROSSOVER
0
12
12
67
67
291
Morgan Stanley Capital  Group
BPA
Glacier Wind
BPAT.NWMT
GLWND1
0
1,800
1,800
10,228
10,228
292
Morgan Stanley Capital  Group
BPA
Glacier Wind
BPAT.NWMT
GLWND2
0
265
265
1,558
1,558
293
Morgan Stanley Capital  Group
BPA
MATL
BPAT.NWMT
MATL.NWMT
0
136,555
136,555
781,775
781,775
294
Morgan Stanley Capital  Group
BPA
MATL
BPAT.NWMT
MATL.NWMT
0
925,225
925,225
5,269,034
5,269,034
295
Morgan Stanley Capital  Group
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
472
472
2,667
2,667
296
Morgan Stanley Capital  Group
BPA
Pacificorp
BPAT.NWMT
BRDY
0
206
206
1,172
1,172
297
Morgan Stanley Capital  Group
BPA
Pacificorp
BPAT.NWMT
JEFF
0
2,583
2,583
15,035
15,035
298
Morgan Stanley Capital  Group
BPA
Pacificorp
BPAT.NWMT
YTP
0
257
257
1,466
1,466
299
Morgan Stanley Capital  Group
BPA
Pacificorp
BPAT.NWMT
BRDY
0
27,433
27,433
177,190
177,190
300
Morgan Stanley Capital  Group
BPA
Pacificorp
BPAT.NWMT
JEFF
0
20,733
20,733
116,474
116,474
301
Morgan Stanley Capital  Group
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
1,965
1,965
11,493
11,493
302
Morgan Stanley Capital  Group
BPA
WAPA
BPAT.NWMT
GREATFALLS
0
26
26
153
153
303
Morgan Stanley Capital  Group
CNTP
BPA
HARDIN
BPAT.NWMT
0
1,396
1,396
8,129
8,129
304
Morgan Stanley Capital  Group
CNTP
BPA
HARDIN
BPAT.NWMT
0
1,272
1,272
6,890
6,890
305
Morgan Stanley Capital  Group
CNTP
Glacier Wind
HARDIN
GLWND1
0
55
55
322
322
306
Morgan Stanley Capital  Group
CNTP
MATL
HARDIN
MATL.NWMT
0
3,587
3,587
20,382
20,382
307
Morgan Stanley Capital  Group
CNTP
MATL
HARDIN
MATL.NWMT
0
14,463
14,463
80,820
80,820
308
Morgan Stanley Capital  Group
CNTP
NWMT
HARDIN
NWMT.SYSTEM
0
160
160
914
914
309
Morgan Stanley Capital  Group
Colstrip Partners
BPA
COLSTRIP
BPAT.NWMT
0
1,423
1,423
8,352
8,352
310
Morgan Stanley Capital  Group
Colstrip Partners
BPA
COLSTRIP
BPAT.NWMT
0
240
240
1,410
1,410
311
Morgan Stanley Capital  Group
Colstrip Partners
MATL
SOUTHPEAK
MATL.NWMT
0
50
50
279
279
312
Morgan Stanley Capital  Group
GLACIER WIND
AVISTA
GLWND1
AVAT.NWMT
0
4,201
4,201
24,399
24,399
313
Morgan Stanley Capital  Group
GLACIER WIND
AVISTA
GLWND2
AVAT.NWMT
0
2,251
2,251
13,160
13,160
314
Morgan Stanley Capital  Group
GLACIER WIND
AVISTA
GLWND1
AVAT.NWMT
0
11,647
11,647
58,050
58,050
315
Morgan Stanley Capital  Group
GLACIER WIND
AVISTA
GLWND2
AVAT.NWMT
0
6,425
6,425
35,698
35,698
316
Morgan Stanley Capital  Group
GLACIER WIND
BPA
GLWND1
BPAT.NWMT
0
55,434
55,434
321,235
321,235
317
Morgan Stanley Capital  Group
GLACIER WIND
BPA
GLWND2
BPAT.NWMT
0
25,593
25,593
148,319
148,319
318
Morgan Stanley Capital  Group
GLACIER WIND
BPA
GLWND1
BPAT.NWMT
0
130,453
130,453
739,342
739,342
319
Morgan Stanley Capital  Group
GLACIER WIND
BPA
GLWND2
BPAT.NWMT
0
79,039
79,039
449,476
449,476
320
Morgan Stanley Capital  Group
GLACIER WIND
Glacier Wind
GLWND1
GLWND2
0
4
4
23
23
321
Morgan Stanley Capital  Group
GLACIER WIND
MATL
GLWND1
MATL.NWMT
0
22,951
22,951
131,860
131,860
322
Morgan Stanley Capital  Group
GLACIER WIND
MATL
GLWND2
MATL.NWMT
0
6,776
6,776
38,916
38,916
323
Morgan Stanley Capital  Group
GLACIER WIND
NWMT
GLWND1
NWMT.SYSTEM
0
40
40
232
232
324
Morgan Stanley Capital  Group
GLACIER WIND
NWMT
GLWND2
NWMT.SYSTEM
0
17,516
17,516
100,419
100,419
325
Morgan Stanley Capital  Group
GLACIER WIND
NWMT
GLWND2
GREATFALLS
0
192
192
1,128
1,128
326
Morgan Stanley Capital  Group
GLACIER WIND
NWMT
GLWND2
NWMT.SYSTEM
0
38,187
38,187
218,683
218,683
327
Morgan Stanley Capital  Group
GLACIER WIND
Pacificorp
GLWND1
BRDY
0
6,782
6,782
39,584
39,584
328
Morgan Stanley Capital  Group
GLACIER WIND
Pacificorp
GLWND1
JEFF
0
6,061
6,061
34,661
34,661
329
Morgan Stanley Capital  Group
GLACIER WIND
Pacificorp
GLWND2
BRDY
0
4,724
4,724
26,835
26,835
330
Morgan Stanley Capital  Group
GLACIER WIND
Pacificorp
GLWND2
JEFF
0
2,181
2,181
12,526
12,526
331
Morgan Stanley Capital  Group
GLACIER WIND
Pacificorp
GLWND1
BRDY
0
7,200
7,200
40,683
40,683
332
Morgan Stanley Capital  Group
GLACIER WIND
Pacificorp
GLWND1
JEFF
0
21,840
21,840
127,900
127,900
333
Morgan Stanley Capital  Group
GLACIER WIND
Pacificorp
GLWND2
BRDY
0
9,840
9,840
54,884
54,884
334
Morgan Stanley Capital  Group
GLACIER WIND
Pacificorp
GLWND2
JEFF
0
960
960
3,748
3,748
335
Morgan Stanley Capital  Group
GLACIER WIND
WAPA
GLWND1
CROSSOVER
0
295
295
1,682
1,682
336
Morgan Stanley Capital  Group
GLACIER WIND
WAPA
GLWND2
CROSSOVER
0
1
1
6
6
337
Morgan Stanley Capital  Group
GLACIER WIND
WAPA
GLWND2
CROSSOVER
0
120
120
650
650
338
Morgan Stanley Capital  Group
MATL
AVISTA
MATL.NWMT
AVAT.NWMT
0
7,309
7,309
42,447
42,447
339
Morgan Stanley Capital  Group
MATL
AVISTA
MATL.NWMT
AVAT.NWMT
0
64,884
64,884
367,361
367,361
340
Morgan Stanley Capital  Group
MATL
BPA
MATL.NWMT
BPAT.NWMT
0
91,085
91,085
524,038
524,038
341
Morgan Stanley Capital  Group
MATL
BPA
MATL.NWMT
BPAT.NWMT
0
250,456
250,456
1,428,055
1,428,055
342
Morgan Stanley Capital  Group
MATL
Glacier Wind
MATL.NWMT
GLWND1
0
1,307
1,307
7,460
7,460
343
Morgan Stanley Capital  Group
MATL
Glacier Wind
MATL.NWMT
GLWND2
0
38
38
223
223
344
Morgan Stanley Capital  Group
MATL
NWMT
MATL.NWMT
NWMT.SYSTEM
0
19
19
106
106
345
Morgan Stanley Capital  Group
MATL
Pacificorp
MATL.NWMT
BRDY
0
6,915
6,915
38,927
38,927
346
Morgan Stanley Capital  Group
MATL
Pacificorp
MATL.NWMT
JEFF
0
15,549
15,549
89,515
89,515
347
Morgan Stanley Capital  Group
MATL
Pacificorp
MATL.NWMT
BRDY
0
21,600
21,600
119,171
119,171
348
Morgan Stanley Capital  Group
MATL
Pacificorp
MATL.NWMT
JEFF
0
12,624
12,624
69,810
69,810
349
Morgan Stanley Capital  Group
MATL
WAPA
MATL.NWMT
CROSSOVER
0
2,111
2,111
12,410
12,410
350
Morgan Stanley Capital  Group
MATL
WAPA
MATL.NWMT
CROSSOVER
0
2,640
2,640
14,300
14,300
351
Morgan Stanley Capital  Group
NWMT
BPA
KERR
BPAT.NWMT
0
640
640
3,655
3,655
352
Morgan Stanley Capital  Group
NWMT
BPA
KERR
BPAT.NWMT
0
480
480
2,600
2,600
353
Morgan Stanley Capital  Group
NWMT
MATL
COLSTRIP
MATL.NWMT
0
5,305
5,305
31,023
31,023
354
Morgan Stanley Capital  Group
NWMT
MATL
JUDITHGAP
MATL.NWMT
0
50
50
279
279
355
Morgan Stanley Capital  Group
NWMT
MATL
KERR
MATL.NWMT
0
1,622
1,622
9,537
9,537
356
Morgan Stanley Capital  Group
NWMT
MATL
NWMTIMBALANC
MATL.NWMT
0
1
1
6
6
357
Morgan Stanley Capital  Group
NWMT
MATL
COLSTRIP
MATL.NWMT
0
33,989
33,989
198,336
198,336
358
Morgan Stanley Capital  Group
NWMT
MATL
KERR
MATL.NWMT
0
57,453
57,453
332,888
332,888
359
Morgan Stanley Capital  Group
NWMT
NWMT
COLSTRIP
NWMT.SYSTEM
0
45
45
265
265
360
Morgan Stanley Capital  Group
NWMT
NWMT
KERR
NWMT.SYSTEM
0
69
69
406
406
361
Morgan Stanley Capital  Group
NWMT
Pacificorp
HARDIN
BRDY
0
2,736
2,736
14,820
14,820
362
Morgan Stanley Capital  Group
Pacificorp
BPA
BRDY
BPAT.NWMT
0
78
78
443
443
363
Morgan Stanley Capital  Group
Pacificorp
BPA
YTP
NWMT.SYSTEM
0
892
892
5,245
5,245
364
Morgan Stanley Capital  Group
Pacificorp
MATL
BRDY
MATL.NWMT
0
1,996
1,996
11,266
11,266
365
Morgan Stanley Capital  Group
Pacificorp
MATL
JEFF
MATL.NWMT
0
56
56
323
323
366
Morgan Stanley Capital  Group
Pacificorp
MATL
YTP
MATL.NWMT
0
25
25
144
144
367
Morgan Stanley Capital  Group
Pacificorp
MATL
BRDY
MATL.NWMT
0
912
912
5,358
5,358
368
Morgan Stanley Capital  Group
Pacificorp
MATL
YTP
MATL.NWMT
0
28,410
28,410
164,205
164,205
369
Morgan Stanley Capital  Group
PPLM
AVISTA
KERR
AVAT.NWMT
0
808
808
4,509
4,509
370
Morgan Stanley Capital  Group
WAPA
AVISTA
GREATFALLS
AVAT.NWMT
0
790
790
4,558
4,558
371
Morgan Stanley Capital  Group
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
1,600
1,600
9,387
9,387
372
Morgan Stanley Capital  Group
WAPA
BPA
GREATFALLS
BPAT.NWMT
0
19,649
19,649
113,264
113,264
373
Morgan Stanley Capital  Group
WAPA
MATL
CROSSOVER
MATL.NWMT
0
2,416
2,416
14,169
14,169
374
Morgan Stanley Capital  Group
WAPA
MATL
GREATFALLS
MATL.NWMT
0
17,431
17,431
100,213
100,213
375
Morgan Stanley Capital  Group
WAPA
NWMT
GREATFALLS
NWMT.SYSTEM
0
7
7
41
41
376
Morgan Stanley Capital  Group
WAPA
Pacificorp
CROSSOVER
JEFF
0
50
50
279
279
377
Morgan Stanley Capital  Group
WAPA
Pacificorp
GREATFALLS
BRDY
0
1,214
1,214
6,990
6,990
378
Morgan Stanley Capital  Group
WAPA
Pacificorp
GREATFALLS
JEFF
0
2,747
2,747
15,682
15,682
379
Morgan Stanley Capital  Group
WAPA
Pacificorp
GREATFALLS
YTP
0
345
345
2,029
2,029
380
Morgan Stanley Capital  Group
WAPA
WAPA
GREATFALLS
CROSSOVER
0
350
350
2,006
2,006
381
Naturener Power Watch, LLC
GLACIER WIND
Glacier Wind
GLWND1
GLWND2
0
3,720
3,720
21,375
21,375
382
Naturener Power Watch, LLC
GLACIER WIND
Glacier Wind
GLWND1
GLWND2
0
40,050
40,050
229,751
229,751
383
PacifiCorp
BPA
NWMT
BPAT.NWMT
COLSTRIP
0
332
332
1,869
1,869
384
PacifiCorp
BPA
Pacificorp
BPAT.NWMT
YTP
0
479
479
2,817
2,817
385
PacifiCorp
BPA
Pacificorp
BPAT.NWMT
YTP
0
207,336
207,336
1,205,487
1,205,487
386
PacifiCorp
Colstrip Partners
Pacificorp
COLSTRIP
YTP
0
9,408
9,408
55,216
55,216
387
PacifiCorp
NWMT
NWMT
COLSTRIP
NWMT.SYSTEM
0
34
34
200
200
388
PacifiCorp
NWMT
NWMT
COLSTRIP
NWMT.SYSTEM
0
672
672
3,944
3,944
389
PacifiCorp
Pacificorp
BPA
YTP
BPAT.NWMT
0
9,786
9,786
55,497
55,497
390
PacifiCorp
Pacificorp
BPA
YTP
BPAT.NWMT
0
17,026
17,026
93,340
93,340
391
PacifiCorp
Pacificorp
NWMT
MLCK
JEFF
0
63
63
370
370
392
PacifiCorp
Pacificorp
NWMT
YTP
COLSTRIP
0
28
28
160
160
393
PacifiCorp
Pacificorp
NWMT
YTP
NWMT.SYSTEM
0
78
78
438
438
394
Phillips 66 Company
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
477
477
2,767
2,767
395
Phillips 66 Company
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
16
16
94
94
396
Portland General Electric Company
AVISTA
AVISTA
COLSTRIP
AVAT.NWMT
0
9,248
9,248
54,116
54,116
397
Portland General Electric Company
AVISTA
NWMT
AVAT.NWMT
COLSTRIP
0
21
21
123
123
398
Portland General Electric Company
AVISTA
NWMT
AVAT.NWMT
NWMT.SYSTEM
0
1,760
1,760
9,878
9,878
399
Portland General Electric Company
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
8
8
47
47
400
Portland General Electric Company
BPA
NWMT
BPAT.NWMT
COLSTRIP
0
1,271
1,271
7,283
7,283
401
Portland General Electric Company
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
950
950
5,421
5,421
402
Portland General Electric Company
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
167
167
932
932
403
Portland General Electric Company
BPA
Pacificorp
BPAT.NWMT
YTP
0
54
54
318
318
404
Portland General Electric Company
BPA
Pacificorp
BPAT.NWMT
YTP
0
1,680
1,680
9,100
9,100
405
Portland General Electric Company
Colstrip Partners
AVISTA
COLSTRIP
AVAT.NWMT
0
2,233
2,233
13,130
13,130
406
Portland General Electric Company
Colstrip Partners
BPA
COLSTRIP
BPAT.NWMT
0
79,567
79,567
467,566
467,566
407
Portland General Electric Company
Colstrip Partners
NWMT
COLSTRIP
TOWNSEND
0
40
40
235
235
408
Portland General Electric Company
Colstrip Partners
Pacificorp
COLSTRIP
BRDY
0
1,130
1,130
6,644
6,644
409
Portland General Electric Company
Colstrip Partners
Pacificorp
COLSTRIP
YTP
0
8,976
8,976
51,667
51,667
410
Portland General Electric Company
NWMT
Pacificorp
COLSTRIP
BRDY
0
2,375
2,375
13,965
13,965
411
Portland General Electric Company
Pacificorp
BPA
YTP
BPAT.NWMT
0
524
524
3,081
3,081
412
Powerex  Corporation
AVISTA
BPA
AVAT.NWMT
BPAT.NWMT
0
56
56
329
329
413
Powerex  Corporation
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
2,571
2,571
14,923
14,923
414
Powerex  Corporation
AVISTA
WAPA
AVAT.NWMT
CROSSOVER
0
751
751
4,282
4,282
415
Powerex  Corporation
BPA
AVISTA
BPAT.NWMT
AVAT.NWMT
0
1
1
6
6
416
Powerex  Corporation
BPA
Pacificorp
BPAT.NWMT
BRDY
0
821
821
4,589
4,589
417
Powerex  Corporation
BPA
Pacificorp
BPAT.NWMT
JEFF
0
166
166
976
976
418
Powerex  Corporation
BPA
Pacificorp
BPAT.NWMT
YTP
0
14,797
14,797
85,810
85,810
419
Powerex  Corporation
BPA
Pacificorp
BPAT.NWMT
BRDY
0
460,776
460,776
2,640,885
2,640,885
420
Powerex  Corporation
BPA
Pacificorp
BPAT.NWMT
JEFF
0
1,824
1,824
9,880
9,880
421
Powerex  Corporation
BPA
Pacificorp
BPAT.NWMT
YTP
0
7,488
7,488
42,001
42,001
422
Powerex  Corporation
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
10,440
10,440
59,964
59,964
423
Powerex  Corporation
MATL
BPA
MATL.NWMT
BPAT.NWMT
0
2,555
2,555
14,563
14,563
424
Powerex  Corporation
MATL
Pacificorp
MATL.NWMT
BRDY
30
22,320
22,320
121,825
121,825
425
Powerex  Corporation
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
456
456
2,653
2,653
426
Powerex  Corporation
Pacificorp
BPA
BRDY
BPAT.NWMT
0
260
260
1,451
1,451
427
Powerex  Corporation
Pacificorp
BPA
YTP
BPAT.NWMT
0
15,224
15,224
88,197
88,197
428
Powerex  Corporation
Pacificorp
Pacificorp
BRDY
YTP
0
50
50
294
294
429
Powerex  Corporation
Pacificorp
Pacificorp
JEFF
YTP
0
30
30
167
167
430
Powerex  Corporation
Pacificorp
Pacificorp
YTP
BRDY
0
113
113
634
634
431
Powerex  Corporation
Pacificorp
Pacificorp
YTP
JEFF
0
543
543
3,193
3,193
432
Powerex  Corporation
Pacificorp
WAPA
JEFF
CROSSOVER
0
165
165
921
921
433
Powerex  Corporation
Pacificorp
WAPA
YTP
CROSSOVER
0
156
156
886
886
434
Powerex  Corporation
WAPA
AVISTA
CROSSOVER
AVAT.NWMT
0
33
33
194
194
435
Powerex  Corporation
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
31,289
31,289
180,858
180,858
436
Powerex  Corporation
WAPA
Pacificorp
CROSSOVER
BRDY
0
163
163
958
958
437
Powerex  Corporation
WAPA
Pacificorp
CROSSOVER
YTP
0
68
68
379
379
438
Public Service Co. of Colorado MISO
BPA
NWMT
NWMT
NWMT.SYSTEM
0
31
31
173
173
439
Puget Sound Energy Marketing
BPA
NWMT
BPAT.NWMT
COLSTRIP
0
2,120
2,120
11,916
11,916
440
Puget Sound Energy Marketing
Colstrip Partners
BPA
COLSTRIP
BPAT.NWMT
0
2,390
2,390
13,957
13,957
441
Puget Sound Energy Marketing
Colstrip Partners
BPA
COLSTRIP
BPAT.NWMT
0
25,560
25,560
150,020
150,020
442
Rainbow Energy Marketing Corp
AVAT
WAPA
AVAT.NWMT
CROSSOVER
0
849
849
4,815
4,815
443
Rainbow Energy Marketing Corp
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
97
97
541
541
444
Rainbow Energy Marketing Corp
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
2,400
2,400
14,100
14,100
445
Rainbow Energy Marketing Corp
BPA
Pacificorp
BPAT.NWMT
BRDY
0
128
128
753
753
446
Rainbow Energy Marketing Corp
BPA
Pacificorp
BPAT.NWMT
JEFF
0
19
19
112
112
447
Rainbow Energy Marketing Corp
BPA
Pacificorp
BPAT.NWMT
YTP
0
2,776
2,776
16,323
16,323
448
Rainbow Energy Marketing Corp
BPA
Pacificorp
BPAT.NWMT
YTP
0
2,160
2,160
12,690
12,690
449
Rainbow Energy Marketing Corp
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
902
902
5,095
5,095
450
Rainbow Energy Marketing Corp
Colstrip Partners
Pacificorp
COLSTRIP
YTP
0
1,617
1,617
9,501
9,501
451
Rainbow Energy Marketing Corp
Colstrip Partners
Pacificorp
COLSTRIP
YTP
0
600
600
3,250
3,250
452
Rainbow Energy Marketing Corp
Colstrip Partners
WAPA
COLSTRIP
CROSSOVER
0
703
703
3,953
3,953
453
Rainbow Energy Marketing Corp
NWMT
Pacificorp
DAVEGATES
YTP
0
3
3
17
17
454
Rainbow Energy Marketing Corp
Pacificorp
BPA
YTP
BPAT
0
301
301
1,770
1,770
455
Rainbow Energy Marketing Corp
Pacificorp
NWMT
YTP
NWMT.SYSTEM
0
7
7
39
39
456
Rainbow Energy Marketing Corp
Pacificorp
NWMT
BRDY
NWMT.SYSTEM
0
600
600
3,525
3,525
457
Rainbow Energy Marketing Corp
Pacificorp
WAPA
BRDY
CROSSOVER
0
1,318
1,318
7,354
7,354
458
Rainbow Energy Marketing Corp
Pacificorp
WAPA
YTP
CROSSOVER
0
4,244
4,244
24,825
24,825
459
Rainbow Energy Marketing Corp
Pacificorp
WAPA
BRDY
CROSSOVER
0
1,416
1,416
7,670
7,670
460
Rainbow Energy Marketing Corp
WAPA
AVISTA
CROSSOVER
AVAT.NWMT
0
250
250
1,395
1,395
461
Rainbow Energy Marketing Corp
WAPA
AVISTA
CROSSOVER
AVAT.NWMT
0
600
600
3,525
3,525
462
Rainbow Energy Marketing Corp
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
820
820
4,818
4,818
463
Rainbow Energy Marketing Corp
WAPA
NWMT
CROSSOVER
NWMT.SYSTEM
0
1,320
1,320
7,755
7,755
464
Rainbow Energy Marketing Corp
WAPA
Pacificorp
CROSSOVER
JEFF
0
116
116
682
682
465
Rainbow Energy Marketing Corp
WAPA
Pacificorp
CROSSOVER
YTP
0
128
128
745
745
466
Shell Energy North America
AVISTA
BPA
AVAT.NWMT
NWMT.SYSTEM
0
18
18
100
100
467
Shell Energy North America
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
285
285
1,676
1,676
468
Shell Energy North America
AVISTA
WAPA
AVAT.NWMT
CROSSOVER
0
402
402
2,364
2,364
469
Shell Energy North America
BPA
Pacificorp
BPAT.NWMT
BRDY
0
1,104
1,104
6,297
6,297
470
Shell Energy North America
BPA
Pacificorp
BPAT.NWMT
JEFF
0
19
19
112
112
471
Shell Energy North America
BPA
Pacificorp
BPAT.NWMT
YTP
0
3,526
3,526
20,703
20,703
472
Shell Energy North America
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
31,076
31,076
181,033
181,033
473
Shell Energy North America
NWMT
BPA
CROOKEDFALLS
BPAT.NWMT
0
180
180
1,058
1,058
474
Shell Energy North America
NWMT
BPA
NWMTIMBALANC
BPAT.NWMT
0
90
90
502
502
475
Shell Energy North America
Pacificorp
AVISTA
BRDY
AVAT.NWMT
0
18,550
18,550
109,164
109,164
476
Shell Energy North America
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
1,849
1,849
10,868
10,868
477
Shell Energy North America
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
223,175
223,175
1,301,175
1,301,175
478
Shell Energy North America
Pacificorp
BPA
BRDY
BPAT.NWMT
0
134
134
748
748
479
Shell Energy North America
Pacificorp
BPA
YTP
BPAT.NWMT
0
57,043
57,043
334,080
334,080
480
Shell Energy North America
Pacificorp
BPA
YTP
BPAT.NWMT
0
43,411
43,411
254,100
254,100
481
Shell Energy North America
Pacificorp
Pacificorp
YTP
BRDY
0
60
60
353
353
482
Shell Energy North America
Pacificorp
WAPA
BRDY
CROSSOVER
0
572
572
3,191
3,191
483
Shell Energy North America
WAPA
AVISTA
CROSSOVER
AVAT.NWMT
0
734
734
4,316
4,316
484
Shell Energy North America
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
72,536
72,536
416,264
416,264
485
Shell Energy North America
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
3,360
3,360
18,200
18,200
486
Shell Energy North America
WAPA
NWMT
CROSSOVER
GTFALLSNWMT
0
14
14
78
78
487
Shell Energy North America
WAPA
NWMT
CROSSOVER
NWMT.SYSTEM
0
43
43
240
240
488
Shell Energy North America
WAPA
Pacificorp
CROSSOVER
BRDY
0
2,608
2,608
14,647
14,647
489
Shell Energy North America
WAPA
Pacificorp
CROSSOVER
JEFF
0
383
383
2,252
2,252
490
Shell Energy North America
WAPA
Pacificorp
CROSSOVER
YTP
0
160
160
917
917
491
Talen Energy Marketing, LLC
NWMT
BPAT
GTFALLSNWMT
BPAT.NWMT
25
219,000
219,000
1,255,642
1,255,642
492
Tec Energy Inc
Pacificorp
MATL
BRDY
MATL.NWMT
0
70
70
391
391
493
Tec Energy Inc
Pacificorp
Pacificorp
YTP
BRDY
0
70
70
412
412
494
Tec Energy Inc
WAPA
Pacificorp
CROSSOVER
BRDY
0
480
480
2,820
2,820
495
Tenaska
BPA
Pacificorp
BPAT.NWMT
BRDY
0
96
96
520
520
496
Tenaska
Coltrip Partners
BPA
COLSTRIP
BPAT.NWMT
0
192
192
1,040
1,040
497
Tenaska
NWMT
Pacificorp
COLSTRIP
BRDY
0
1,362
1,362
7,471
7,471
498
Tenaska
NWMT
Pacificorp
COLSTRIP
YTP
0
44
44
246
246
499
Tenaska
NWMT
Pacificorp
COLSTRIP
BRDY
0
192
192
1,040
1,040
500
The Energy Authority
AVA
PPW
AVAT.NWMT
YTP
0
53
53
297
297
501
The Energy Authority
BPA
NWMT
BPAT.NWMT
MATL.NWMT
0
120
120
706
706
502
The Energy Authority
BPA
NWMT
BPAT.NWMT
NWMT.SYSTEM
0
42
42
247
247
503
The Energy Authority
BPA
Pacificorp
BPAT.NWMT
BRDY
0
1,228
1,228
7,137
7,137
504
The Energy Authority
BPA
Pacificorp
BPAT.NWMT
JEFF
0
281
281
1,652
1,652
505
The Energy Authority
BPA
Pacificorp
BPAT.NWMT
YTP
0
2,120
2,120
12,304
12,304
506
The Energy Authority
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
2,767
2,767
16,270
16,270
507
The Energy Authority
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
1,200
1,200
6,500
6,500
508
The Energy Authority
MATL
BPA
MATL.NWMT
BPAT.NWMT
0
1
1
6
6
509
The Energy Authority
NWMT
BPA
NWMTIMBALANC
BPAT.NWMT
0
47
47
276
276
510
The Energy Authority
NWMT
Pacificorp
NWMTIMBALANC
BPAT.NWMT
0
88
88
517
517
511
The Energy Authority
Pacificorp
AVA
YTP
AVAT.NWMT
0
2,780
2,780
16,343
16,343
512
The Energy Authority
Pacificorp
AVA
YTP
AVAT.NWMT
0
5,688
5,688
33,417
33,417
513
The Energy Authority
Pacificorp
BPAT
BRDY
BPAT.NWMT
0
538
538
3,050
3,050
514
The Energy Authority
Pacificorp
BPAT
YTP
BPAT.NWMT
0
16,879
16,879
98,450
98,450
515
The Energy Authority
Pacificorp
NWMT
YTP
NWMT.SYSTEM
0
720
720
4,230
4,230
516
The Energy Authority
Pacificorp
NWMT
YTP
NWMT.SYSTEM
0
960
960
5,640
5,640
517
The Energy Authority
Pacificorp
Pacificorp
YTP
BRDY
0
4,157
4,157
23,145
23,145
518
The Energy Authority
Pacificorp
Pacificorp
YTP
JEFF
0
692
692
4,069
4,069
519
The Energy Authority
Pacificorp
Pacificorp
YTP
BRDY
0
480
480
2,600
2,600
520
The Energy Authority
Pacificorp
WAPA
BRDY
CROSSOVER
0
67
67
394
394
521
The Energy Authority
Pacificorp
WAPA
YTP
CROSSOVER
0
71
71
417
417
522
The Energy Authority
WAPA
AVA
CROSSOVER
AVAT.NWMT
0
889
889
5,205
5,205
523
The Energy Authority
WAPA
AVA
CROSSOVER
AVAT.NWMT
0
720
720
4,230
4,230
524
The Energy Authority
WAPA
BPAT
CROSSOVER
BPAT.NWMT
0
5,363
5,363
31,313
31,313
525
The Energy Authority
WAPA
BPAT
CROSSOVER
BPAT.NWMT
0
1,800
1,800
10,300
10,300
526
The Energy Authority
WAPA
Pacificorp
CROSSOVER
BRDY
0
1,127
1,127
6,347
6,347
527
The Energy Authority
WAPA
Pacificorp
CROSSOVER
JEFF
0
208
208
1,161
1,161
528
The Energy Authority
WAPA
Pacificorp
CROSSOVER
YTP
0
30
30
176
176
529
The Energy Authority
WAPA
Pacificorp
CROSSOVER
BRDY
0
120
120
650
650
530
TransAlta Energy Marketing
AVISTA
NWMT
AVAT.NWMT
NWMT.SYSTEM
0
163
163
958
958
531
TransAlta Energy Marketing
AVISTA
Pacificorp
AVAT.NWMT
YTP
0
339
339
1,993
1,993
532
TransAlta Energy Marketing
BPA
Pacificorp
BPAT.NWMT
BRDY
0
44,710
44,710
259,595
259,595
533
TransAlta Energy Marketing
BPA
Pacificorp
BPAT.NWMT
YTP
0
2,205
2,205
12,964
12,964
534
TransAlta Energy Marketing
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
12,433
12,433
71,532
71,532
535
TransAlta Energy Marketing
BPA
WAPA
BPAT.NWMT
CROSSOVER
0
2,040
2,040
11,050
11,050
536
TransAlta Energy Marketing
Colstrip Partners
WAPA
COLSTRIP
CROSSOVER
0
24
24
130
130
537
TransAlta Energy Marketing
MATL
BPA
MATL.NWMT
BPAT.NWMT
0
3,913
3,913
21,986
21,986
538
TransAlta Energy Marketing
MATL
Pacificorp
MATL.NWMT
BRDY
0
900
900
5,022
5,022
539
TransAlta Energy Marketing
MATL
WAPA
MATL.NWMT
CROSSOVER
0
5,195
5,195
28,988
28,988
540
TransAlta Energy Marketing
NWMT
BPA
NWMTIMBALANC
BPAT.NWMT
0
100
100
588
588
541
TransAlta Energy Marketing
Pacificorp
AVISTA
YTP
AVAT.NWMT
0
150
150
837
837
542
TransAlta Energy Marketing
Pacificorp
BPA
YTP
BPAT.NWMT
0
11,920
11,920
67,908
67,908
543
TransAlta Energy Marketing
Pacificorp
BPA
YTP
BPAT.NWMT
0
1,200
1,200
6,500
6,500
544
TransAlta Energy Marketing
Pacificorp
Pacificorp
YTP
BRDY
0
170
170
949
949
545
TransAlta Energy Marketing
Pacificorp
WAPA
BRDY
CROSSOVER
0
40
40
235
235
546
TransAlta Energy Marketing
Pacificorp
WAPA
YTP
CROSSOVER
0
152
152
848
848
547
TransAlta Energy Marketing
Pacificorp
WAPA
YTP
CROSSOVER
0
24
24
130
130
548
TransAlta Energy Marketing
WAPA
AVISTA
CROSSOVER
AVAT.NWMT
0
922
922
5,194
5,194
549
TransAlta Energy Marketing
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
44,690
44,690
258,083
258,083
550
TransAlta Energy Marketing
WAPA
BPA
CROSSOVER
BPAT.NWMT
0
3,575
3,575
19,500
19,500
551
TransAlta Energy Marketing
WAPA
Pacificorp
CROSSOVER
BRDY
0
805
805
4,550
4,550
552
TransAlta Energy Marketing
WAPA
Pacificorp
CROSSOVER
YTP
0
350
350
1,953
1,953
553
Uniper Global Commodities North America LLC
Pacificorp
BPA
YTP
BPAT.NWMT
0
150
150
882
882
554
Western Area Power Admin
Pacificorp
WAPA
YTP
CROSSOVER
0
513
513
2,863
2,863
555
Western Area Power Admin
Pacificorp
WAPA
YTP
GREATFALLS
0
477
477
2,662
2,662
556
Western Area Power Admin
WAPA
NWMT
CROSSOVER
NWMT.SYSTEM
0
3,782
3,782
21,549
21,549
557
Western Area Power Admin
WAPA
NWMT
GREATFALLS
NWMT.SYSTEM
0
17,508
17,508
100,450
100,450
558
Western Area Power Admin
WAPA
Pacificorp
CROSSOVER
YTP
0
1,920
1,920
11,280
11,280
559
Western Area Power Admin
WAPA
WAPA
CANYONFERRY
CROSSOVER
0
151,352
151,352
875,920
875,920
560
Western Area Power Admin
WAPA
WAPA
CANYONFERRY
GREATFALLS
0
32,777
32,777
190,918
190,918
561
Western Area Power Admin
WAPA
WAPA
CROSSOVER
GREATFALLS
0
215
215
1,200
1,200
562
Western Area Power Admin
WAPA
WAPA
GREATFALLS
CROSSOVER
0
237
237
1,322
1,322
563
Western Area Power Admin
WAPA
WAPA
CROSSOVER
GREATFALLS
0
118,005
118,005
675,825
675,825
564
Western Area Power Admin
WAPA
WAPA
GREATFALLS
CROSSOVER
0
160,220
160,220
923,300
923,300
565
SOUTH DAKOTA
566
BRYANT, CITY OF
WAPA
BRYANT
HURON 115 KV BUS
BRYANT 25 KV
0
4,222
4,222
30,692
30,692
567
GROTON, CITY OF
WAPA
GROTON
HURON 115 KV BUS
GROTON 69 KV
0
16,755
16,755
1,026
1,026
568
LANGFORD, CITY OF
WAPA
LANGFORD
HURON 115 KV BUS
LANGFORD 12.5 KV
0
3,133
3,133
23,058
23,058
569
Southwest Power Pool (SPP)
SPP
Various
Various
Various
0
0
241,296
(a)
241,296
570
Southwest Power Pool (SPP)
SPP
Various
Various
Various
91,249
(b)
91,249
571
Southwest Power Pool (SPP)
SPP
Various
Various
Various
0
0
6,678,128
(c)
6,678,128
572
Rounding
1
1
1
4
1
4
35 TOTAL
1,152
12,419,664
12,419,664
37,132,633
36,886,656
7,010,674
81,029,963


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: RevenuesFromTransmissionOfElectricityForOthers
Firm and Non-Firm Point to Point Transmission Service.
(b) Concept: RevenuesFromTransmissionOfElectricityForOthers
Non-Firm Point to Point Transmission Service.
(c) Concept: RevenuesFromTransmissionOfElectricityForOthers
Network integration transmission service.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
TRANSMISSION OF ELECTRICITY BY ISO/RTOs
  1. Report in Column (a) the Transmission Owner receiving revenue for the transmission of electricity by the ISO/RTO.
  2. Use a separate line of data for each distinct type of transmission service involving the entities listed in Column (a).
  3. In Column (b) enter a Statistical Classification code based on the original contractual terms and conditions of the service as follows: FNO – Firm Network Service for Others, FNS – Firm Network Transmission Service for Self, LFP – Long-Term Firm Point-to-Point Transmission Service, OLF – Other Long-Term Firm Transmission Service, SFP – Short-Term Firm Point-to-Point Transmission Reservation, NF – Non-Firm Transmission Service, OS – Other Transmission Service and AD- Out-of-Period Adjustments. Use this code for any accounting adjustments or “true-ups” for service provided in prior reporting periods. Provide an explanation in a footnote for each adjustment. See General Instruction for definitions of codes.
  4. In column (c) identify the FERC Rate Schedule or tariff Number, on separate lines, list all FERC rate schedules or contract designations under which service, as identified in column (b) was provided.
  5. In column (d) report the revenue amounts as shown on bills or vouchers.
  6. Report in column (e) the total revenues distributed to the entity listed in column (a).
Line No.
Payment Received by (Transmission Owner Name)
(a)
Statistical Classification
(b)
FERC Rate Schedule or Tariff Number
(c)
Total Revenue by Rate Schedule or Tariff
(d)
Total Revenue
(e)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
40
TOTAL


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
TRANSMISSION OF ELECTRICITY BY OTHERS (Account 565)
  1. Report all transmission, i.e. wheeling or electricity provided by other electric utilities, cooperatives, municipalities, other public authorities, qualifying facilities, and others for the quarter.
  2. In column (a) report each company or public authority that provided transmission service. Provide the full name of the company, abbreviate if necessary, but do not truncate name or use acronyms. Explain in a footnote any ownership interest in or affiliation with the transmission service provider. Use additional columns as necessary to report all companies or public authorities that provided transmission service for the quarter reported.
  3. In column (b) enter a Statistical Classification code based on the original contractual terms and conditions of the service as follows:
    FNS - Firm Network Transmission Service for Self, LFP - Long-Term Firm Point-to-Point Transmission Reservations. OLF - Other Long-Term Firm Transmission Service, SFP - Short-Term Firm Point-to- Point Transmission Reservations, NF - Non-Firm Transmission Service, and OS - Other Transmission Service. See General Instructions for definitions of statistical classifications.
  4. Report in column (c) and (d) the total megawatt hours received and delivered by the provider of the transmission service.
  5. Report in column (e), (f) and (g) expenses as shown on bills or vouchers rendered to the respondent. In column (e) report the demand charges and in column (f) energy charges related to the amount of energy transferred. On column (g) report the total of all other charges on bills or vouchers rendered to the respondent, including any out of period adjustments. Explain in a footnote all components of the amount shown in column (g). Report in column (h) the total charge shown on bills rendered to the respondent. If no monetary settlement was made, enter zero in column (h). Provide a footnote explaining the nature of the non-monetary settlement, including the amount and type of energy or service rendered.
  6. Enter ""TOTAL"" in column (a) as the last line.
  7. Footnote entries and provide explanations following all required data.
TRANSFER OF ENERGY EXPENSES FOR TRANSMISSION OF ELECTRICITY BY OTHERS
Line No.
NameOfCompanyOrPublicAuthorityTransmissionOfElectricityByOthers
Name of Company or Public Authority (Footnote Affiliations)
(a)
StatisticalClassificationCode
Statistical Classification
(b)
TransmissionOfElectricityByOthersEnergyReceived
MegaWatt Hours Received
(c)
TransmissionOfElectricityByOthersEnergyDelivered
MegaWatt Hours Delivered
(d)
DemandChargesTransmissionOfElectricityByOthers
Demand Charges ($)
(e)
EnergyChargesTransmissionOfElectricityByOthers
Energy Charges ($)
(f)
OtherChargesTransmissionOfElectricityByOthers
Other Charges ($)
(g)
ChargesForTransmissionOfElectricityByOthers
Total Cost of Transmission ($)
(h)
1
MONTANA
2
Vigilante Elec. Coop
27,377
27,377
48,183
48,183
3
Bonneville Power Admin
(a)
3,655,032
3,655,032
4
Sun River Elect Coop
3,713
3,713
20,424
20,424
5
Southwester Power Pool (MT)
111,081
111,081
2,189,583
2,189,583
6
Glacier Electric Coop
1,529
1,529
4,832
4,832
7
Supply:
8
Avista
9,622
9,622
67,145
67,145
9
Bonneville Power Admin
447,611
447,611
1,253,059
1,253,059
10
Idaho Power Company
45
45
288
288
11
Seattle City Light
7,779
7,779
14,052
14,052
12
SOUTH DAKOTA
13
East River
847
847
14
West Central Elect COOP
14,492
14,492
15
Southwest Power Pool (SD)
20,046,259
20,046,259
TOTAL
608,757
608,757
22,324,619
1,334,544
3,655,032
27,314,195


FOOTNOTE DATA

(a) Concept: OtherChargesTransmissionOfElectricityByOthers
Monthly system usage fee.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
MISCELLANEOUS GENERAL EXPENSES (Account 930.2) (ELECTRIC)
Line No.
Description
(a)
Amount
(b)
1
IndustryAssociationDues
Industry Association Dues
410,197
2
NuclearPowerResearchExpenses
Nuclear Power Research Expenses
3
OtherExperimentalAndGeneralResearchExpenses
Other Experimental and General Research Expenses
4
PublicationAndDistributionExpensesForSecuritiesToStockholders
Pub and Dist Info to Stkhldrs...expn servicing outstanding Securities
230,587
5
OtherMiscellaneousGeneralExpenses
Oth Expn greater than or equal to 5,000 show purpose, recipient, amount. Group if less than $5,000
6
Universal Systems Benefit Charge
10,017,316
7
Board of Directors
1,979,879
8
Uncollectible Accounts
31,913
9
Our Portion of Shared Generation
520,749
10
Community Relations
238,588
11
Economic Development
180,525
12
Miscellaneous
22,540
46
MiscellaneousGeneralExpenses
TOTAL
(a)
13,568,468


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: MiscellaneousGeneralExpenses
Montana
Operations
South Dakota
Operations
Total 930.2
Universal System Benefits Charge 10,017,316  10,017,316 
Our Portion of Shared Ownership Gen 520,749  520,749 
Uncollectible Accounts (31,965) 52  (31,913)
10,506,100  52  10,506,152 
Board of Directors Fees 1,673,137  306,742  1,979,879 
Shareholder Expense 204,540  26,048  230,587 
Industry & Association Dues 252,987  157,210  410,197 
Business Development/Community Relations 196,100  42,488  238,588 
Economic Development 54,924  125,602  180,525 
Miscellaneous 22,522  17  22,540 
2,404,209  658,107  3,062,317 
Total Account 930.2 12,910,309   658,159   13,568,468  

Montana Operations Miscellaneous General Expenses account 930.2 includes $63,818 of Electric non-allowed Industry and Association Dues, which is removed for rate making purposes.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Depreciation and Amortization of Electric Plant (Account 403, 404, 405)
  1. Report in section A for the year the amounts for: (b) Depreciation Expense (Account 403); (c) Depreciation Expense for Asset Retirement Costs (Account 403.1); (d) Amortization of Limited-Term Electric Plant (Account 404); and (e) Amortization of Other Electric Plant (Account 405).
  2. Report in Section B the rates used to compute amortization charges for electric plant (Accounts 404 and 405). State the basis used to compute charges and whether any changes have been made in the basis or rates used from the preceding report year.
  3. Report all available information called for in Section C every fifth year beginning with report year 1971, reporting annually only changes to columns (c) through (g) from the complete report of the preceding year.
    Unless composite depreciation accounting for total depreciable plant is followed, list numerically in column (a) each plant subaccount, account or functional classification, as appropriate, to which a rate is applied. Identify at the bottom of Section C the type of plant included in any sub-account used.
    In column (b) report all depreciable plant balances to which rates are applied showing subtotals by functional Classifications and showing composite total. Indicate at the bottom of section C the manner in which column balances are obtained. If average balances, state the method of averaging used.
    For columns (c), (d), and (e) report available information for each plant subaccount, account or functional classification listed in column (a). If plant mortality studies are prepared to assist in estimating average service Lives, show in column (f) the type of mortality curve selected as most appropriate for the account and in column (g), if available, the weighted average remaining life of surviving plant. If composite depreciation accounting is used, report available information called for in columns (b) through (g) on this basis.
  4. If provisions for depreciation were made during the year in addition to depreciation provided by application of reported rates, state at the bottom of section C the amounts and nature of the provisions and the plant items to which related.
A. Summary of Depreciation and Amortization Charges
Line No.
FunctionalClassificationAxis
Functional Classification
(a)
DepreciationExpenseExcludingAmortizationOfAcquisitionAdjustments
Depreciation Expense (Account 403)
(b)
DepreciationExpenseForAssetRetirementCostsExcludingAmortizationgOfAcquisitionAdjustments
Depreciation Expense for Asset Retirement Costs (Account 403.1)
(c)
AmortizationOfLimitedTermPlantOrProperty
Amortization of Limited Term Electric Plant (Account 404)
(d)
AmortizationOfOtherElectricPlant
Amortization of Other Electric Plant (Acc 405)
(e)
DepreciationAndAmortization
Total
(f)
1
Intangible Plant
459,875
459,875
2
Steam Production Plant
6,997,409
6,997,409
3
Nuclear Production Plant
4
Hydraulic Production Plant-Conventional
9,846,046
9,846,046
5
Hydraulic Production Plant-Pumped Storage
6
Other Production Plant
17,335,138
5,606
17,340,744
7
Transmission Plant
25,720,688
491,753
26,212,441
8
Distribution Plant
56,848,499
25,402
56,823,097
9
Regional Transmission and Market Operation
10
General Plant
10,090,236
10,090,236
11
Common Plant-Electric
5,312,582
5,595,115
10,907,697
12
TOTAL
(a)
132,150,598
(b)
6,526,947
138,677,545
B. Basis for Amortization Charges
The basis used to compute the charges is the ending plant balance. The basis is different from the preceding year due to net plant additions throughout the year. There has been no update to the authorized rates in the current year. The rates used to compute amortization charges for 'Intangible Plant - Electric' (Account 404) are as follows: 302 Intangible Plant: Franchises and Consents 2.00%; 303 Intangible Plant: Five Year Software 20%; 303 Intangible Plant: BPA Rattlesnake Line 3.34%; 340.2 Intangible Plant: Other Production Land Rights 3.34%; 340.2 Intangible Plant: Spion Kop Land Rights 4.00%; 350.2 Intangible Plant: Transmission Land Rights 1.51%; 360.2 Intangible Plant: Distribution Land Rights (0.59%); 4303.5 Intangible Plant: Five Year Common Software 20%; and 4303.1 Intangible Plant: Ten Year Common Software 10%. For FERC reporting purposes, common amortization expense is allocated to electric and gas amortization as cmmon amortization expense is not reported on the FERC forms. The rate used to allocate the common amortization expense to electric is 72.00%.
C. Factors Used in Estimating Depreciation Charges
Line No.
AccountNumberFactorsUsedInEstimatingDepreciationCharges
Account No.
(a)
DepreciablePlantBase
Depreciable Plant Base (in Thousands)
(b)
UtilityPlantEstimatedAverageServiceLife
Estimated Avg. Service Life
(c)
UtilityPlantNetSalvageValuePercentage
Net Salvage (Percent)
(d)
UtilityPlantAppliedDepreciationRate
Applied Depr. Rates (Percent)
(e)
MortalityCurveType
Mortality Curve Type
(f)
UtilityPlantWeightedAverageRemainingLife
Average Remaining Life
(g)
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: DepreciationExpenseExcludingAmortizationOfAcquisitionAdjustments
Montana Operations

A. Summary of Depreciation and Amortization Charges

Line No. Functional Classification
(a)
Depreciation
Expense
(Account 403)
(b)
Depreciation
Expense for Asset
Retirement Costs (Account 403.1)
(c)
Amortization of
Limited Term
Electric Plant (Account 404)
(d)
Amortization of
Other Electric
Plant (Acc 405)
(e)
Total
1 Intangible Plant 453,897 453,897
2 Steam Production Plant 3,157,581 3,157,581
3 Nuclear Production Plant
4 Hydraulic Production Plant‐Conventional 9,846,046 9,846,046
5
Hydraulic Production Plant‐Pumped Storage
6 Other Production Plant 10,834,943 5,606 10,840,549
7 Transmission Plant 19,527,203 491,753 20,018,956
8 Distribution Plant 46,627,884 (25,402) 46,602,482
9 General Plant 8,524,715 8,524,715
10 Common Plant-Electric 3,098,478 4,403,622 7,502,100
11 TOTAL 101,616,849 5,329,476 106,946,326


South Dakota Operations

Line No. Functional Classification
(a)
Depreciation
Expense
(Account 403)
(b)
Depreciation
Expense for Asset
Retirement Costs (Account 403.1)
(c)
Amortization of
Limited Term
Electric Plant (Account 404)
(d)
Amortization of
Other Electric
Plant (Acc 405)
(e)
Total
1 Intangible Plant 5,978 5,978
2 Steam Production Plant 3,839,828 3,839,828
3 Nuclear Production Plant
4 Hydraulic Production Plant‐Conventional
5
Hydraulic Production Plant‐Pumped Storage
6 Other Production Plant 6,500,195 6,500,195
7 Transmission Plant 6,193,485 6,193,485
8 Distribution Plant 10,220,615 10,220,615
9 General Plant 1,565,521 1,565,521
10 Common Plant-Electric 2,214,104 1,191,493 3,405,597
11 TOTAL 29,637,249 1,197,471 31,731,219
(b) Concept: AmortizationOfLimitedTermPlantOrProperty
B. Basis for Amortization Charges

The following represents transmission and distribution land rights and computer software amortization applicable to or allocated to the electric department. These costs are amortized over the expected life of the transmission or distribution plant or computer software.

Plant
Amount
Costs Being Amortized Amortization Period (Years) Annual Amortization Allocated to Electric
302 $ 19,288,558  50 $ 300,746  300,746 
303 6,406,682  5 130,129  130,129 
303 868,284  30 29,001  29,001 
340.2 89,998  25, 30 5,606  5,606 
350.2 33,304,418  58 491,753  491,753 
360.2 4,303,968  60 (25,412) (25,412)
4303 40,720,303  5, 10 7,517,899  5,595,124 
104,982,211  8,449,722  6,526,947 


The above schedule represents a full year amortization calculation. Further, per our last Montana rate case, our Montana plant assets do not begin amortization until the year subsequent to being placed into service. Our South Dakota plant assets do not begin amortization until the quarter subsequent to being placed into service.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
REGULATORY COMMISSION EXPENSES
  1. Report particulars (details) of regulatory commission expenses incurred during the current year (or incurred in previous years, if being amortized) relating to format cases before a regulatory body, or cases in which such a body was a party.
  2. Report in columns (b) and (c), only the current year's expenses that are not deferred and the current year's amortization of amounts deferred in previous years.
  3. Show in column (k) any expenses incurred in prior years which are being amortized. List in column (a) the period of amortization.
  4. List in columns (f), (g), and (h), expenses incurred during the year which were charged currently to income, plant, or other accounts.
  5. Minor items (less than $25,000) may be grouped.
EXPENSES INCURRED DURING YEAR AMORTIZED DURING YEAR
CURRENTLY CHARGED TO
Line No.
RegulatoryCommissionDescription
Description (Furnish name of regulatory commission or body the docket or case number and a description of the case)
(a)
RegulatoryExpensesAssessedByRegulatoryCommission
Assessed by Regulatory Commission
(b)
RegulatoryExpensesOfUtility
Expenses of Utility
(c)
RegulatoryCommissionExpensesAmount
Total Expenses for Current Year
(d)
OtherRegulatoryAssetsRegulatoryCommissionExpenses
Deferred in Account 182.3 at Beginning of Year
(e)
NameOfDepartmentRegulatoryCommissionExpensesCharged
Department
(f)
AccountNumberRegulatoryCommissionExpensesCharged
Account No.
(g)
RegulatoryComissionExpensesIncurredAndCharged
Amount
(h)
RegulatoryCommissionExpensesDeferredToOtherRegulatoryAssets
Deferred to Account 182.3
(i)
DeferredRegulatoryCommissionExpensesAmortizedInContraAccount
Contra Account
(j)
DeferredRegulatoryCommissionExpensesAmortized
Amount
(k)
OtherRegulatoryAssetsRegulatoryCommissionExpenses
Deferred in Account 182.3 End of Year
(l)
1
Annual Charges Under the Omnibus
2
Reconciliation Act of 1986
3
FERC Order No. 472
827,077
(a)
827,077
Electric
827,077
5
Montana PSC Electric & Gas Rate Filings
148,270
148,270
Electric
147,110
6
Gas
1,160
8
Montana FERC Rate Case
3,494
3,494
Electric
3,494
10
FERC Administrative Charges Allocated to
11
Generating Stations Under Project License
1,649,607
1,649,607
Electric
1,649,607
46
TOTAL
2,476,684
151,764
2,628,448
2,628,448


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: RegulatoryCommissionExpensesAmount
Montana electric regulatory commission expenses totaled $2,625,393 for 2021. This includes $828,677 in expenses that are transmission specific.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
RESEARCH, DEVELOPMENT, AND DEMONSTRATION ACTIVITIES
  1. Describe and show below costs incurred and accounts charged during the year for technological research, development, and demonstration (R, D and D) project initiated, continued or concluded during the year. Report also support given to others during the year for jointly-sponsored projects.(Identify recipient regardless of affiliation.) For any R, D and D work carried with others, show separately the respondent's cost for the year and cost chargeable to others (See definition of research, development, and demonstration in Uniform System of Accounts).
  2. Indicate in column (a) the applicable classification, as shown below:
    Classifications:
    1. Electric R, D and D Performed Internally:
      1. Generation
        1. hydroelectric
          1. Recreation fish and wildlife
          2. Other hydroelectric
        2. Fossil-fuel steam
        3. Internal combustion or gas turbine
        4. Nuclear
        5. Unconventional generation
        6. Siting and heat rejection
      2. Transmission
        1. Overhead
        2. Underground
      3. Distribution
      4. Regional Transmission and Market Operation
      5. Environment (other than equipment)
      6. Other (Classify and include items in excess of $50,000.)
      7. Total Cost Incurred
    2. Electric, R, D and D Performed Externally:
      1. Research Support to the electrical Research Council or the Electric Power Research Institute
      2. Research Support to Edison Electric Institute
      3. Research Support to Nuclear Power Groups
      4. Research Support to Others (Classify)
      5. Total Cost Incurred
  3. Include in column (c) all R, D and D items performed internally and in column (d) those items performed outside the company costing $50,000 or more, briefly describing the specific area of R, D and D (such as safety, corrosion control, pollution, automation, measurement, insulation, type of appliance, etc.). Group items under $50,000 by classifications and indicate the number of items grouped. Under Other, (A (6) and B (4)) classify items by type of R, D and D activity.
  4. Show in column (e) the account number charged with expenses during the year or the account to which amounts were capitalized during the year, listing Account 107, Construction Work in Progress, first. Show in column (f) the amounts related to the account charged in column (e).
  5. Show in column (g) the total unamortized accumulating of costs of projects. This total must equal the balance in Account 188, Research, Development, and Demonstration Expenditures, Outstanding at the end of the year.
  6. If costs have not been segregated for R, D and D activities or projects, submit estimates for columns (c), (d), and (f) with such amounts identified by ""Est.""
  7. Report separately research and related testing facilities operated by the respondent.
AMOUNTS CHARGED IN CURRENT YEAR
Line No.
ResearchDevelopmentAndDemonstrationClassification
Classification
(a)
ResearchDevelopmentAndDemonstrationDescription
Description
(b)
ResearchDevelopmentAndDemonstrationCostsIncurredInternally
Costs Incurred Internally Current Year
(c)
ResearchDevelopmentAndDemonstrationCostsIncurredExternally
Costs Incurred Externally Current Year
(d)
AccountNumberForResearchDevelopmentAndDemonstrationCosts
Amounts Charged In Current Year: Account
(e)
ResearchDevelopmentAndDemonstrationCosts
Amounts Charged In Current Year: Amount
(f)
ResearchDevelopmentAndDemonstrationExpenditures
Unamortized Accumulation
(g)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
DISTRIBUTION OF SALARIES AND WAGES

Report below the distribution of total salaries and wages for the year. Segregate amounts originally charged to clearing accounts to Utility Departments, Construction, Plant Removals, and Other Accounts, and enter such amounts in the appropriate lines and columns provided. In determining this segregation of salaries and wages originally charged to clearing accounts, a method of approximation giving substantially correct results may be used.

Line No.
Classification
(a)
Direct Payroll Distribution
(b)
Allocation of Payroll Charged for Clearing Accounts
(c)
Total
(d)
1
SalariesAndWagesElectricAbstract
Electric
2
SalariesAndWagesElectricOperationAbstract
Operation
3
SalariesAndWagesElectricOperationProduction
Production
7,933,419
4
SalariesAndWagesElectricOperationTransmission
Transmission
6,641,913
5
SalariesAndWagesElectricOperationRegionalMarket
Regional Market
81,227
6
SalariesAndWagesElectricOperationDistribution
Distribution
12,806,642
7
SalariesAndWagesElectricOperationCustomerAccounts
Customer Accounts
4,312,376
8
SalariesAndWagesElectricOperationCustomerServiceAndInformational
Customer Service and Informational
3,954,373
9
SalariesAndWagesElectricOperationSales
Sales
10
SalariesAndWagesElectricOperationAdministrativeAndGeneral
Administrative and General
27,810,536
11
SalariesAndWagesElectricOperation
TOTAL Operation (Enter Total of lines 3 thru 10)
63,540,486
12
SalariesAndWagesElectricMaintenanceAbstract
Maintenance
13
SalariesAndWagesElectricMaintenanceProduction
Production
2,011,894
14
SalariesAndWagesElectricMaintenanceTransmission
Transmission
1,904,389
15
SalariesAndWagesElectricMaintenanceRegionalMarket
Regional Market
16
SalariesAndWagesElectricMaintenanceDistribution
Distribution
8,965,447
17
SalariesAndWagesElectricMaintenanceAdministrativeAndGeneral
Administrative and General
3,860,431
18
SalariesAndWagesElectricMaintenance
TOTAL Maintenance (Total of lines 13 thru 17)
16,742,161
19
SalariesAndWagesElectricOperationAndMaintenanceAbstract
Total Operation and Maintenance
20
SalariesAndWagesElectricProduction
Production (Enter Total of lines 3 and 13)
9,945,313
21
SalariesAndWagesElectricTransmission
Transmission (Enter Total of lines 4 and 14)
8,546,302
22
SalariesAndWagesElectricRegionalMarket
Regional Market (Enter Total of Lines 5 and 15)
81,227
23
SalariesAndWagesElectricDistribution
Distribution (Enter Total of lines 6 and 16)
21,772,089
24
SalariesAndWagesElectricCustomerAccounts
Customer Accounts (Transcribe from line 7)
4,312,376
25
SalariesAndWagesElectricCustomerServiceAndInformational
Customer Service and Informational (Transcribe from line 8)
3,954,373
26
SalariesAndWagesElectricSales
Sales (Transcribe from line 9)
27
SalariesAndWagesElectricAdministrativeAndGeneral
Administrative and General (Enter Total of lines 10 and 17)
31,670,967
28
SalariesAndWagesElectricOperationAndMaintenance
TOTAL Oper. and Maint. (Total of lines 20 thru 27)
80,282,647
80,282,647
29
SalariesAndWagesGasAbstract
Gas
30
SalariesAndWagesGasOperationAbstract
Operation
31
SalariesAndWagesGasOperationProductionManufacturedGas
Production - Manufactured Gas
32
SalariesAndWagesGasOperationProductionNaturalGas
Production-Nat. Gas (Including Expl. And Dev.)
1,671,749
33
SalariesAndWagesGasOperationOtherGasSupply
Other Gas Supply
70,282
34
SalariesAndWagesGasOperationStorageLiquifiedNaturalGasTerminalingAndProcessing
Storage, LNG Terminaling and Processing
434,503
35
SalariesAndWagesGasOperationTransmission
Transmission
4,579,139
36
SalariesAndWagesGasOperationDistribution
Distribution
8,453,744
37
SalariesAndWagesGasCustomerAccounts
Customer Accounts
1,803,810
59
SalariesAndWagesGasCustomerServiceAndInformational
Customer Service and Informational
1,517,626
60
SalariesAndWagesGasSales
Sales
40
SalariesAndWagesGasOperationAdministrativeAndGeneral
Administrative and General
11,416,439
41
SalariesAndWagesGasOperation
TOTAL Operation (Enter Total of lines 31 thru 40)
29,947,292
42
SalariesAndWagesGasMaintenanceAbstract
Maintenance
43
SalariesAndWagesGasMaintenanceProductionManufacturedGas
Production - Manufactured Gas
44
SalariesAndWagesGasMaintenanceProductionNaturalGas
Production-Natural Gas (Including Exploration and Development)
169,177
45
SalariesAndWagesGasMaintenanceOtherGasSupply
Other Gas Supply
46
SalariesAndWagesGasMaintenanceStorageLngTerminalingAndProcessing
Storage, LNG Terminaling and Processing
176,045
47
SalariesAndWagesGasMaintenanceTransmission
Transmission
945,827
48
SalariesAndWagesGasMaintenanceDistribution
Distribution
3,025,476
49
SalariesAndWagesGasMaintenanceAdministrativeAndGeneral
Administrative and General
1,465,656
50
SalariesAndWagesGasMaintenance
TOTAL Maint. (Enter Total of lines 43 thru 49)
5,782,181
51
SalariesAndWagesGasOperationAndMaintenanceAbstract
Total Operation and Maintenance
52
SalariesAndWagesGasProductionManufacturedGas
Production-Manufactured Gas (Enter Total of lines 31 and 43)
53
SalariesAndWagesGasProductionNaturalGas
Production-Natural Gas (Including Expl. and Dev.) (Total lines 32,
1,840,926
54
SalariesAndWagesGasOtherGasSupply
Other Gas Supply (Enter Total of lines 33 and 45)
70,282
55
SalariesAndWagesGasStorageLngTerminalingAndProcessing
Storage, LNG Terminaling and Processing (Total of lines 31 thru
610,548
56
SalariesAndWagesGasTransmission
Transmission (Lines 35 and 47)
5,524,966
57
SalariesAndWagesGasDistribution
Distribution (Lines 36 and 48)
11,479,220
37
SalariesAndWagesGasCustomerAccounts
Customer Accounts (Line 37)
1,803,810
38
SalariesAndWagesGasCustomerServiceAndInformational
Customer Service and Informational (Line 38)
1,517,626
60
SalariesAndWagesGasSales
Sales (Line 39)
61
SalariesAndWagesGasAdministrativeAndGeneral
Administrative and General (Lines 40 and 49)
12,882,095
62
SalariesAndWagesGasOperationAndMaintenance
TOTAL Operation and Maint. (Total of lines 52 thru 61)
35,729,473
35,729,472
63
SalariesAndWagesOtherUtilityDepartmentsAbstract
Other Utility Departments
64
SalariesAndWagesOtherUtilityDepartmentsOperationAndMaintenance
Operation and Maintenance
56,666
56,666
65
SalariesAndWagesOperationsAndMaintenance
TOTAL All Utility Dept. (Total of lines 28, 62, and 64)
116,068,786
116,068,786
66
SalariesAndWagesUtilityPlantAbstract
Utility Plant
67
SalariesAndWagesUtilityPlantConstructionAbstract
Construction (By Utility Departments)
68
SalariesAndWagesUtilityPlantConstructionElectricPlant
Electric Plant
30,247,669
30,247,669
69
SalariesAndWagesUtilityPlantConstructionGasPlant
Gas Plant
11,033,298
11,033,298
70
SalariesAndWagesUtilityPlantConstructionOther
Other (provide details in footnote):
71
SalariesAndWagesUtilityPlantConstruction
TOTAL Construction (Total of lines 68 thru 70)
41,280,967
41,280,967
72
SalariesAndWagesPlantRemovalAbstract
Plant Removal (By Utility Departments)
73
SalariesAndWagesPlantRemovalElectricPlant
Electric Plant
74
SalariesAndWagesPlantRemovalGasPlant
Gas Plant
75
SalariesAndWagesPlantRemovalOther
Other (provide details in footnote):
76
SalariesAndWagesPlantRemoval
TOTAL Plant Removal (Total of lines 73 thru 75)
77
SalariesAndWagesOtherAccountsAbstract
Other Accounts (Specify, provide details in footnote):
78
SalariesAndWagesOtherAccountsDescription
1,068,856
1,068,856
79
SalariesAndWagesOtherAccountsDescription
499,597
499,597
80
SalariesAndWagesOtherAccountsDescription
81
SalariesAndWagesOtherAccountsDescription
82
SalariesAndWagesOtherAccountsDescription
83
SalariesAndWagesOtherAccountsDescription
84
SalariesAndWagesOtherAccountsDescription
85
SalariesAndWagesOtherAccountsDescription
86
SalariesAndWagesOtherAccountsDescription
87
SalariesAndWagesOtherAccountsDescription
88
SalariesAndWagesOtherAccountsDescription
89
SalariesAndWagesOtherAccountsDescription
90
SalariesAndWagesOtherAccountsDescription
91
SalariesAndWagesOtherAccountsDescription
92
SalariesAndWagesOtherAccountsDescription
93
SalariesAndWagesOtherAccountsDescription
94
SalariesAndWagesOtherAccountsDescription
95
SalariesAndWagesOtherAccounts
TOTAL Other Accounts
1,568,453
1,568,453
96
SalariesAndWagesGeneralExpense
TOTAL SALARIES AND WAGES
158,918,206
(a)(b)
158,918,206


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: SalariesAndWagesGeneralExpense
South Dakota Operations
DISTRIBUTION OF SALARIES AND WAGES
LINE NO. CLASSIFICATION DIRECT PAYROLL DISTRIBUTION ALLOCATION OF PAYROLL CHARGED FOR CLEARING ACCOUNTS TOTAL
(a) (b) (c) (d)
1 ELECTRIC
2 OPERATION
3 PRODUCTION 551,362 
4 TRANSMISSION 491,417 
5 REGIONAL MARKET 81,227 
6 DISTRIBUTION 2,671,022 
7 CUSTOMER ACCOUNTS 366,497 
8 CUSTOMER SERVICE & INFORMATION 1,095,380 
9 SALES
10 ADMINISTRATIVE & GENERAL 4,125,765 
11 TOTAL OPERATION 9,382,670 
12 MAINTENANCE
13 PRODUCTION 302,234 
14 TRANSMISSION 233,939 
15 REGIONAL MARKET
16 DISTRIBUTION 1,218,727 
17 ADMINISTRATIVE & GENERAL 254,581 
18 TOTAL MAINTENANCE 2,009,482 
19 TOTAL OPERATION & MAINTENANCE
20 PRODUCTION 853,596 
21 TRANSMISSION 725,356 
22 REGIONAL MARKET 81,227 
23 DISTRIBUTION 3,889,750 
24 CUSTOMER ACCOUNTS 366,497 
25 CUSTOMER SERVICE & INFORMATION 1,095,380 
26 SALES
27 ADMINISTRATIVE & GENERAL 4,380,346 
28 TOTAL OPERATION & MAINTENANCE 11,392,152  11,392,152 
29 GAS
30 OPERATION
31 PRODUCTION - MANUFACTURED GAS
32 PRODUCTION - NAT. GAS
33 OTHER GAS SUPPLY
34 STORAGE, LNG TERMINAL PROCESSING
35 TRANSMISSION 29,010 
36 DISTRIBUTION 3,726,834 
37 CUSTOMER ACCOUNTS 386,242 
38 CUSTOMER SERVICE & INFORMATION 700,138 
39 SALES
40 ADMINISTRATIVE & GENERAL 2,895,852 
41 TOTAL OPERATION 7,738,077 
42 MAINTENANCE
43 PRODUCTION - MANUFACTURED GAS
44 PRODUCTION - NATURAL GAS
45 OTHER GAS SUPPLY
46 STORAGE, LNG TERMINAL PROCESSING
47 TRANSMISSION 2,979 
48 DISTRIBUTION 969,593 
49 ADMINISTRATIVE & GENERAL 175,291 
50 TOTAL MAINTENANCE 1,147,864 
GAS (CONTINUED)
51 TOTAL OPERATION & MAINTENANCE
52 PRODUCTION - MANUFACTURED GAS
53 PRODUCTION - NATURAL GAS
54 OTHER GAS SUPPLY
55 STORAGE, LNG TERMINAL PROCESSING
56 TRANSMISSION 31,989 
57 DISTRIBUTION 4,696,427 
58 CUSTOMER ACCOUNTS 386,242 
59 CUSTOMER SERVICE & INFORMATION 700,138 
60 SALES
61 ADMINISTRATIVE & GENERAL 3,071,143 
62 TOTAL OPERATION & MAINTENANCE 8,885,941  8,885,941 
63 OTHER UTILITY DEPARTMENTS
64 OPERATION & MAINTENANCE
65 TOTAL ALL UTILITY DEPARTMENTS 20,278,092  20,278,092 
66 UTILITY PLANT
67 CONSTRUCTION (BY UTILITY DEPARTMENT)
68 ELECTRIC PLANT 5,254,314  5,254,314 
69 GAS PLANT 2,251,849  2,251,849 
70 OTHER
71 TOTAL CONSTRUCTION 7,506,163  7,506,163 
72 PLANT REMOVAL
73 ELECTRIC PLANT
74 GAS PLANT
75 OTHER
76 TOTAL PLANT REMOVAL
77 OTHER ACCOUNTS (SPECIFY):
78 A/R ASSOCIATED COMPANIES (ACCT 146) 8,114,394  8,114,394 
79 A/R MISCELLANEOUS (ACCT 143)
80 SEVERANCE PAYMENTS (ACCT 182)
81 EXPENSES OF NON-UTILITY OP (ACCT 417) 22,672 
82 OTHER
83
98 TOTAL OTHER ACCOUNTS 8,137,066  8,137,066 
99 TOTAL SALARIES AND WAGES 35,921,322  35,921,322 
(b) Concept: SalariesAndWagesGeneralExpense
Montana Operations
DISTRIBUTION OF SALARIES AND WAGES
LINE NO. CLASSIFICATION
DIRECT PAYROLL
 
DISTRIBUTION
ALLOCATION OF
PAYROLL CHARGED FOR
 
CLEARING ACCOUNTS
TOTAL
(a) (b) (c) (d)
1 ELECTRIC
2 OPERATION
3 PRODUCTION 7,382,057 
4 TRANSMISSION 6,150,495 
5 REGIONAL MARKET
6 DISTRIBUTION 10,135,620 
7 CUSTOMER ACCOUNTS 3,945,879 
8 CUSTOMER SERVICE & INFORMATION 2,858,993 
9 SALES
10 ADMINISTRATIVE & GENERAL 23,684,771 
11 TOTAL OPERATION 54,157,815 
12 MAINTENANCE
13 PRODUCTION 1,709,660 
14 TRANSMISSION 1,670,450 
15 REGIONAL MARKET
16 DISTRIBUTION 7,746,720 
17 ADMINISTRATIVE & GENERAL 3,605,850 
18 TOTAL MAINTENANCE 14,732,681 
19 TOTAL OPERATION & MAINTENANCE
20 PRODUCTION 9,091,717 
21 TRANSMISSION 7,820,945 
22 REGIONAL MARKET
23 DISTRIBUTION 17,882,341 
24 CUSTOMER ACCOUNTS 3,945,879 
25 CUSTOMER SERVICE & INFORMATION 2,858,993 
26 SALES
27 ADMINISTRATIVE & GENERAL 27,290,621 
28 TOTAL OPERATION & MAINTENANCE 68,890,496  0 68,890,496 
29 GAS
30 OPERATION
31 PRODUCTION - MANUFACTURED GAS
32 PRODUCTION - NAT. GAS 1,671,749 
33 OTHER GAS SUPPLY 70,282 
34 STORAGE, LNG TERMINAL PROCESSING 434,503 
35 TRANSMISSION 4,550,129 
36 DISTRIBUTION 4,726,910 
37 CUSTOMER ACCOUNTS 1,417,568 
38 CUSTOMER SERVICE & INFORMATION 817,487 
39 SALES
40 ADMINISTRATIVE & GENERAL 8,520,586 
41 TOTAL OPERATION 22,209,215 
42 MAINTENANCE
43 PRODUCTION - MANUFACTURED GAS
44 PRODUCTION - NATURAL GAS 169,177 
45 OTHER GAS SUPPLY
46 STORAGE, LNG TERMINAL PROCESSING 176,045 
47 TRANSMISSION 942,848 
48 DISTRIBUTION 2,055,883 
49 ADMINISTRATIVE & GENERAL 1,290,365 
50 TOTAL MAINTENANCE 4,634,317 
GAS (CONTINUED)
51 TOTAL OPERATION & MAINTENANCE
52 PRODUCTION - MANUFACTURED GAS
53 PRODUCTION - NATURAL GAS 1,840,925 
54 OTHER GAS SUPPLY 70,282 
55 STORAGE, LNG TERMINAL PROCESSING 610,547 
56 TRANSMISSION 5,492,977 
57 DISTRIBUTION 6,782,793 
58 CUSTOMER ACCOUNTS 1,417,568 
59 CUSTOMER SERVICE & INFORMATION 817,487 
60 SALES
61 ADMINISTRATIVE & GENERAL 9,810,951 
62 TOTAL OPERATION & MAINTENANCE 26,843,532  0 26,843,532 
63 OTHER UTILITY DEPARTMENTS
64 OPERATION & MAINTENANCE 56,666  0 56,666 
65 TOTAL ALL UTILITY DEPARTMENTS 95,790,694  0 95,790,694 
66 UTILITY PLANT
67 CONSTRUCTION (BY UTILITY DEPARTMENT)
68 ELECTRIC PLANT 24,993,355  0 24,993,355 
69 GAS PLANT 8,781,449  0 8,781,449 
70 OTHER 0
71 TOTAL CONSTRUCTION 33,774,805  0 33,774,805 
72 PLANT REMOVAL
73 ELECTRIC PLANT 0
74 GAS PLANT
75 OTHER
76 TOTAL PLANT REMOVAL 0
77 OTHER ACCOUNTS (SPECIFY):
78 A/R ASSOCIATED COMPANIES (ACCT 146) 6,715,570  6,715,570 
79 A/R MISCELLANEOUS (ACCT 143)
80 SEVERANCE PAYMENTS (ACCT 182)
81 EXPENSES OF NON-UTILITY OP (ACCT 417) 476,925  476,925 
82 OTHER
83
98 TOTAL OTHER ACCOUNTS 7,192,495  0 7,192,495 
99 TOTAL SALARIES AND WAGES 136,757,994  0 136,757,994 

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
COMMON UTILITY PLANT AND EXPENSES
  1. Describe the property carried in the utility's accounts as common utility plant and show the book cost of such plant at end of year classified by accounts as provided by Electric Plant Instruction 13, Common Utility Plant, of the Uniform System of Accounts. Also show the allocation of such plant costs to the respective departments using the common utility plant and explain the basis of allocation used, giving the allocation factors.
  2. Furnish the accumulated provisions for depreciation and amortization at end of year, showing the amounts and classifications of such accumulated provisions, and amounts allocated to utility departments using the common utility plant to which such accumulated provisions relate, including explanation of basis of allocation and factors used.
  3. Give for the year the expenses of operation, maintenance, rents, depreciation, and amortization for common utility plant classified by accounts as provided by the Uniform System of Accounts. Show the allocation of such expenses to the departments using the common utility plant to which such expenses are related. Explain the basis of allocation used and give the factors of allocation.
  4. Give date of approval by the Commission for use of the common utility plant classification and reference to the order of the Commission or other authorization.
NORTHWESTERN ENERGY - CONSOLIDATED COMMON UTILITY PLANT
Item # 1
Common Utility Plant at December 31, 2021
PLANT
ACCOUNT
DescriptionTotalElectricNatural Gas
C303Misc. Intangible Plant 40,720,302 30,554,894 10,165,408 
C389Land & Land Rights5,839,314 4,234,921 1,604,393 
C390Structures & Improvements 112,689,752 84,720,575 27,969,177 
C391Office Furniture & Equipment 22,216,893 17,227,024 4,989,869 
C392Transportation Equipment 10,188,144 7,819,527 2,368,617 
C393Stores Equipment35,559 30,225 5,334 
C394Tools/Shop/Garage Equipment 163,020 138,567 24,453 
C395Laboratory Equipment
C396Power Operated Equipment 2,106,402 1,790,442 315,960 
C397Communication Equipment 37,892,752 21,939,146 15,953,606 
C398Miscellaneous825,170 597,610 227,560 
Subtotal232,677,308 169,052,931 63,624,377 
Construction Work in Progress32,301,118 
Total264,978,426 
NORTHWESTERN ENERGY - MONTANA COMMON UTILITY PLANT
Item # 1
Common Utility Plant at December 31, 2021
PLANT
ACCOUNT
DescriptionTotalElectricNatural Gas
C303Misc. Intangible Plant 31,210,483 22,471,548 8,738,935 
C389Land & Land Rights4,622,974 3,201,032 1,421,942 
C390Structures & Improvements 74,821,925 52,532,922 22,289,003 
C391Office Furniture & Equipment 12,610,914 9,061,942 3,548,972 
C392Transportation Equipment 6,464,579 4,654,497 1,810,082 
C393Stores Equipment
C394Tools/Shop/Garage Equipment
C395Laboratory Equipment
C396Power Operated Equipment
C397Communication Equipment 33,300,752 18,035,946 15,264,806 
C398Miscellaneous799,354 575,666 223,688 
Subtotal163,830,981 110,533,553 53,297,428 
Construction Work in Progress27,246,593 
NORTHWESTERN ENERGY - SOUTH DAKOTA COMMON UTILITY PLANT
Item # 1
Common Utility Plant at December 31, 2021
PLANT
ACCOUNT
DescriptionTotalElectricNatural Gas
C303Misc. Intangible Plant 9,509,820 8,083,347 1,426,473 
C389Land & Land Rights1,216,340 1,033,889 182,451 
C390Structures & Improvements 37,867,827 32,187,653 5,680,174 
C391Office Furniture & Equipment 9,605,979 8,165,082 1,440,897 
C392Transportation Equipment 3,723,565 3,165,030 558,535 
C393Stores Equipment35,559 30,225 5,334 
C394Tools/Shop/Garage Equipment 163,020 138,567 24,453 
C395Laboratory Equipment
C396Power Operated Equipment 2,106,402 1,790,442 315,960 
C397Communication Equipment 4,591,999 3,903,199 688,800 
C398Miscellaneous25,815 21,943 3,872 
Subtotal68,846,326 58,519,377 10,326,949 
Construction Work in Progress5,054,525 4,296,346 758,179 
Total73,900,851 
NORTHWESTERN ENERGY - CONSOLIDATED COMMON UTILITY ACCUMULATED DEPRECIATION
Item # 2
Common Utility Accumulated Depreciation Reserve At December 31, 2021
PLANT
ACCOUNT
DescriptionTotalElectricNatural Gas
C303Misc. Intangible Plant (20,746,657)(15,615,415)(5,131,242)
C389Land & Land Rights164,360 116,444 47,916 
C390Structures & Improvements (18,501,050)(14,260,413)(4,240,637)
C391Office Furniture & Equipment (5,735,500)(4,307,243)(1,428,257)
C392Transportation Equipment (1,973,450)(1,662,231)(311,219)
C393Stores Equipment(5,334)(4,534)(800)
C394Tools/Shop/Garage Equipment (61,721)(52,463)(9,258)
C395Laboratory Equipment
C396Power Operated Equipment (876,584)(745,096)(131,488)
C397Communication Equipment (20,256,653)(11,749,688)(8,506,965)
C398Miscellaneous(34,285)(13,817)(20,468)
Total(68,026,874)(48,294,456)(19,732,418)
NORTHWESTERN ENERGY - MONTANA COMMON UTILITY ACCUMULATED DEPRECIATION
Item # 2
Common Utility Accumulated Depreciation Reserve At December 31, 2021
PLANT
ACCOUNT
DescriptionTotalElectricNatural Gas
C303Misc. Intangible Plant 15,532,643 11,183,503 4,349,140 
C389Land & Land Rights(164,360)(116,444)(47,916)
C390Structures & Improvements 9,104,371 6,273,236 2,831,135 
C391Office Furniture & Equipment 4,306,830 3,092,873 1,213,957 
C392Transportation Equipment 116,932 84,191 32,741 
C393Stores Equipment
C394Tools/Shop/Garage Equipment
C395Laboratory Equipment
C396Power Operated Equipment
C397Communication Equipment 17,099,941 9,066,482 8,033,459 
C398Miscellaneous117,890 84,881 33,009 
Total46,114,247 29,668,722 16,445,525 
NORTHWESTERN ENERGY - SOUTH DAKOTA COMMON UTILITY ACCUMULATED DEPRECIATION
Item # 2
Common Utility Accumulated Depreciation Reserve At December 31, 2021
PLANT
ACCOUNT
DescriptionTotalElectricNatural Gas
C303Misc. Intangible Plant 5,214,013 4,431,911 782,102 
C389Land & Land Rights
C390Structures & Improvements 9,396,679 7,987,177 1,409,502 
C391Office Furniture & Equipment 1,428,671 1,214,370 214,301 
C392Transportation Equipment 1,856,518 1,578,040 278,478 
C393Stores Equipment5,334 4,534 800 
C394Tools/Shop/Garage Equipment 61,721 52,463 9,258 
C395Laboratory Equipment
C396Power Operated Equipment 876,584 745,096 131,488 
C397Communication Equipment 3,156,713 2,683,206 473,507 
C398Miscellaneous(83,604)(71,063)(12,541)
Total21,912,629 18,625,734 3,286,895 
NORTHWESTERN ENERGY - COMMON UTILITY PLANT EXPENSES FOR THE YEARS ENDING DECEMBER 31, 2021
Item #3
Common ExpensesGeneral
Building
Real Estate
& Personal
Property Tax
Depreciation
&
Amortization
Total
Electric:
Depreciation5,312,582 5,312,582 
Amortization5,595,115 5,595,115 
Taxes Other than Income6,976,471 6,976,471 
Administrative & General1,876,846 1,876,846 
Subtotal1,876,846 6,976,471 10,907,697 19,761,014 
Natural Gas8,350,703 
Total Common Expense28,111,717 
(1)General building expense is allocated to departmental expense accounts based on estimated facility utilization.
(2)Real Estate & Personal Property Taxes are allocated to departmental expense accounts based on the estimated facility utilization.
(3)Depreciation & Amortization expense is allocated to utility departmental expense accounts based on the estimated individual facility utilization applicable to the depreciable common plant.



ITEM #4

FERC staff recommendation dated January 19, 1967 gave approval for the use of the common plant classification.
NORTHWESTERN ENERGY - MONTANA UTILITY PLANT EXPENSES FOR THE YEARS ENDING DECEMBER 31, 2021
Item #3
Common ExpensesGeneral
Building
Real Estate
& Personal
Property Tax
Depreciation
&
Amortization
Total
Electric:
Depreciation3,098,478 3,098,478 
Amortization4,403,622 4,403,622 
Taxes Other than Income6,976,471 6,976,471 
Administrative & General1,753,617 1,753,617 
Subtotal1,753,617 6,976,471 7,502,100 16,232,188 
Natural Gas6,902,335 
Total Common Expense23,134,523 



(1)General building expense is allocated to departmental expense accounts based on estimated facility utilization.
(2)Real Estate & Personal Property Taxes are allocated to departmental expense accounts based on the estimated facility utilization.
(3)Depreciation & Amortization expense is allocated to utility departmental expense accounts based on the estimated individual facility utilization applicable to the depreciable common plant.



ITEM #4

FERC staff recommendation dated January 19, 1967 gave approval for the use of the common plant classification.
NORTHWESTERN ENERGY - MONTANA UTILITY PLANT EXPENSES FOR THE YEARS ENDING DECEMBER 31, 2021
Item #3
Common ExpensesGeneral
Building
Real Estate
& Personal
Property Tax
Depreciation
&
Amortization
Total
Electric:
Depreciation2,214,104 2,214,104 
Amortization1,191,493 1,191,493 
Taxes Other than Income
Administrative & General123,229 123,229 
Subtotal123,229 3,405,597 3,528,826 
Natural Gas600,988 
Total Common Expense4,129,814 



(1)General building expense is allocated to departmental expense accounts based on estimated facility utilization.
(2)Real Estate & Personal Property Taxes are allocated to departmental expense accounts based on the estimated facility utilization.
(3)Depreciation & Amortization expense is allocated to utility departmental expense accounts based on the estimated individual facility utilization applicable to the depreciable common plant.



ITEM #4

FERC staff recommendation dated January 19, 1967 gave approval for the use of the common plant classification.


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
AMOUNTS INCLUDED IN ISO/RTO SETTLEMENT STATEMENTS
  1. The respondent shall report below the details called for concerning amounts it recorded in Account 555, Purchase Power, and Account 447, Sales for Resale, for items shown on ISO/RTO Settlement Statements. Transactions should be separately netted for each ISO/RTO administered energy market for purposes of determining whether an entity is a net seller or purchaser in a given hour. Net megawatt hours are to be used as the basis for determining whether a net purchase or sale has occurred. In each monthly reporting period, the hourly sale and purchase net amounts are to be aggregated and separately reported in Account 447, Sales for Resale, or Account 555, Purchased Power, respectively.
Line No.
Description of Item(s)
(a)
Balance at End of Quarter 1
(b)
Balance at End of Quarter 2
(c)
Balance at End of Quarter 3
(d)
Balance at End of Year
(e)
1 Energy
2 Net Purchases (Account 555)
161,804,268
20,662,038
37,820,834
35,419,325
2.1 Net Purchases (Account 555.1)
3 Net Sales (Account 447)
152,844,256
20,129,835
35,700,300
29,208,432
4 Transmission Rights
5 Ancillary Services
28,694
27,390
29,259
30,043
6 Other Items (list separately)
7
Day Ahead & Real Time Admin
100,429
95,864
102,410
105,153
8
Market Monitoring & Compliance
14,347
13,695
14,630
15,022
46 TOTAL
314,791,994
40,928,822
73,667,433
64,777,975


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
PURCHASES AND SALES OF ANCILLARY SERVICES
Report the amounts for each type of ancillary service shown in column (a) for the year as specified in Order No. 888 and defined in the respondents Open Access Transmission Tariff.
In columns for usage, report usage-related billing determinant and the unit of measure.
  1. On Line 1 columns (b), (c), (d), and (e) report the amount of ancillary services purchased and sold during the year.
  2. On Line 2 columns (b), (c), (d), and (e) report the amount of reactive supply and voltage control services purchased and sold during the year.
  3. On Line 3 columns (b), (c), (d), and (e) report the amount of regulation and frequency response services purchased and sold during the year.
  4. On Line 4 columns (b), (c), (d), and (e) report the amount of energy imbalance services purchased and sold during the year.
  5. On Lines 5 and 6, columns (b), (c), (d), and (e) report the amount of operating reserve spinning and supplement services purchased and sold during the period.
  6. On Line 7 columns (b), (c), (d), and (e) report the total amount of all other types ancillary services purchased or sold during the year. Include in a footnote and specify the amount for each type of other ancillary service provided.
Amount Purchased for the Year Amount Sold for the Year
Usage - Related Billing Determinant Usage - Related Billing Determinant
Line No.
Type of Ancillary Service
(a)
Number of Units
(b)
Unit of Measure
(c)
Dollar
(d)
Number of Units
(e)
Unit of Measure
(f)
Dollars
(g)
1
Scheduling, System Control and Dispatch
(a)
12,395,553
MWh
1,837,059
2
Reactive Supply and Voltage
3
Regulation and Frequency Response
(b)
5,971,016
MWh
1,161,970
4
Energy Imbalance
15,952,564,581
kWh
4,325,963
5
Operating Reserve - Spinning
220
MWh
1,358,201
6
Operating Reserve - Supplement
220
MWh
1,279,124
7
Other
273,098
MWh
7,982,144
8
Total (Lines 1 thru 7)
(c)
15,952,564,581
4,325,963
18,640,107
13,618,497


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: AncillaryServicesSoldNumberOfUnits
Transmission Customers are billed under the formula rate as approved in FERC docket ER19-1756-000. For more information on the NorthWestern Energy OATT see OASIS at https://oasis.oati.com/NWMT.
Number of
Units
(e)
Unit of
Measure
(f)
Dollars
(g)
Scheduling, System Control and Dispatch Network 4,914,330 MWh 741,318
Scheduling, System Control and Dispatch Point-to-Point 7,481,223 MWh 1,095,741
12,395,553 1,837,059
(b) Concept: AncillaryServicesSoldNumberOfUnits
Transmission Customers are billed under the formula rate as approved in FERC docket ER19-1756. For more information on the NorthWestern Energy OATT see OASIS at https://oasis.oati.com/NWMT.

Number of
Units
(e)
Unit of
Measure
(f)
Dollars
(g)
Regulation and Frequency Responses Load Network Cust Schedule 3 Load 4,914,330 MWh 887,365
Regulation and Frequency Responses Non Ver Network Cust Schedule 3 Non Ver 2,525 MW 163,580
Regulation and Frequency Response Point to Point Cust Schedule 3a Ver 23,337 MWh 14,070
Regulation and Frequency Response Point to Point Cust Schedule 3a Non Ver 1,030,824 MWh 96,955
5,971,016 1,161,970
(c) Concept: AncillaryServicesPurchasedNumberOfUnits
This schedule represents Montana Operations only.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
MONTHLY TRANSMISSION SYSTEM PEAK LOAD
  1. Report the monthly peak load on the respondent's transmission system. If the respondent has two or more power systems which are not physically integrated, furnish the required information for each non-integrated system.
  2. Report on Column (b) by month the transmission system's peak load.
  3. Report on Columns (c ) and (d) the specified information for each monthly transmission - system peak load reported on Column (b).
  4. Report on Columns (e) through (j) by month the system' monthly maximum megawatt load by statistical classifications. See General Instruction for the definition of each statistical classification.
Line No.
Month
(a)
Monthly Peak MW - Total
(b)
Day of Monthly Peak
(c)
Hour of Monthly Peak
(d)
Firm Network Service for Self
(e)
Firm Network Service for Others
(f)
Long-Term Firm Point-to-point Reservations
(g)
Other Long-Term Firm Service
(h)
Short-Term Firm Point-to-point Reservation
(i)
Other Service
(j)
NAME OF SYSTEM: Montana Operations
1
January
1,685
27
9
991
647
158
12
3,075
2
February
1,908
11
20
1,190
714
128
12
5,277
3
March
1,564
1
8
895
624
128
12
3,666
4
Total for Quarter 1
3,076
1,985
414
36
12,018
5
April
1,615
1
9
823
598
128
12
2,356
6
May
1,612
17
19
855
599
128
12
1,288
7
June
2,113
30
18
1,222
670
128
12
4,603
8
Total for Quarter 2
2,900
1,867
384
36
8,247
9
July
2,000
27
18
1,247
655
103
12
2,690
10
August
1,862
16
17
1,124
607
103
12
2,163
11
September
1,588
7
18
979
570
103
12
3,326
12
Total for Quarter 3
3,350
1,832
309
36
8,179
13
October
1,487
12
9
874
579
103
12
2,959
14
November
1,583
11
18
1,008
599
103
12
5,183
15
December
1,899
27
18
1,130
703
103
12
4,085
16
Total for Quarter 4
3,012
1,881
309
36
12,227
17
Total
12,338
7,565
1,416
144
40,671
0
NAME OF SYSTEM: South Dakota Operations
1
January
2
February
3
March
4
Total for Quarter 1
5
April
6
May
7
June
8
Total for Quarter 2
9
July
10
August
11
September
12
Total for Quarter 3
13
October
14
November
15
December
16
Total for Quarter 4
17
Total


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Monthly ISO/RTO Transmission System Peak Load
  1. Report the monthly peak load on the respondent's transmission system. If the Respondent has two or more power systems which are not physically integrated, furnish the required information for each non-integrated system.
  2. Report on Column (b) by month the transmission system's peak load.
  3. Report on Column (c) and (d) the specified information for each monthly transmission - system peak load reported on Column (b).
  4. Report on Columns (e) through (i) by month the system’s transmission usage by classification. Amounts reported as Through and Out Service in Column (g) are to be excluded from those amounts reported in Columns (e) and (f).
  5. Amounts reported in Column (j) for Total Usage is the sum of Columns (h) and (i).
Line No.
Month
(a)
Monthly Peak MW - Total
(b)
Day of Monthly Peak
(c)
Hour of Monthly Peak
(d)
Import into ISO/RTO
(e)
Exports from ISO/RTO
(f)
Through and Out Service
(g)
Network Service Usage
(h)
Point-to-Point Service Usage
(i)
Total Usage
(j)
NAME OF SYSTEM: South Dakota Operations
1
January
283
28
8
296
13
2
February
314
12
9
329
15
3
March
249
1
9
261
12
4
Total for Quarter 1
886
40
5
April
230
14
10
241
11
6
May
242
24
16
252
10
7
June
328
10
17
343
15
8
Total for Quarter 2
836
36
9
July
322
28
15
337
15
10
August
333
18
17
348
15
11
September
282
28
17
294
12
12
Total for Quarter 3
979
42
13
October
232
6
17
242
10
14
November
255
12
10
266
11
15
December
241
28
19
254
13
16
Total for Quarter 4
762
34
17
Total Year to Date/Year
3,463
152


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

2021-12-31
Year/Period of Report

End of:
2021
/
Q4
ELECTRIC ENERGY ACCOUNT

Report below the information called for concerning the disposition of electric energy generated, purchased, exchanged and wheeled during the year.

Line No. Item
(a)
MegaWatt Hours
(b)
Line No. Item
(a)
MegaWatt Hours
(b)
1
SOURCES OF ENERGY
21
DISPOSITION OF ENERGY
2
Generation (Excluding Station Use):
22
Sales to Ultimate Consumers (Including Interdepartmental Sales)
7,876,849
3
Steam
2,806,876
23
Requirements Sales for Resale (See instruction 4, page 311.)
4
Nuclear
24
Non-Requirements Sales for Resale (See instruction 4, page 311.)
957,499
5
Hydro-Conventional
2,094,750
25
Energy Furnished Without Charge
6
Hydro-Pumped Storage
26
Energy Used by the Company (Electric Dept Only, Excluding Station Use)
7,550
7
Other
764,409
27
Total Energy Losses
1,104,798
8
Less Energy for Pumping
27.1
Total Energy Stored
9
Net Generation (Enter Total of lines 3 through 8)
5,666,035
28
TOTAL (Enter Total of Lines 22 Through 27.1) MUST EQUAL LINE 20 UNDER SOURCES
9,946,696
10
Purchases (other than for Energy Storage)
4,283,792
10.1
Purchases for Energy Storage
0
11
Power Exchanges:
12
Received
32,615
13
Delivered
35,746
14
Net Exchanges (Line 12 minus line 13)
3,131
15
Transmission For Other (Wheeling)
16
Received
12,419,664
17
Delivered
12,419,664
18
Net Transmission for Other (Line 16 minus line 17)
0
19
Transmission By Others Losses
20
TOTAL (Enter Total of Lines 9, 10, 10.1, 14, 18 and 19)
9,946,696


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
MONTHLY PEAKS AND OUTPUT
  1. Report the monthly peak load and energy output. If the respondent has two or more power which are not physically integrated, furnish the required information for each non- integrated system.
  2. Report in column (b) by month the system’s output in Megawatt hours for each month.
  3. Report in column (c) by month the non-requirements sales for resale. Include in the monthly amounts any energy losses associated with the sales.
  4. Report in column (d) by month the system’s monthly maximum megawatt load (60 minute integration) associated with the system.
  5. Report in column (e) and (f) the specified information for each monthly peak load reported in column (d).
Line No.
MonthAxis
Month
(a)
EnergyActivity
Total Monthly Energy
(b)
NonRequiredSalesForResaleEnergy
Monthly Non-Requirement Sales for Resale & Associated Losses
(c)
MonthlyPeakLoad
Monthly Peak - Megawatts
(d)
DayOfMonthlyPeak
Monthly Peak - Day of Month
(e)
HourOfMonthlyPeak
Monthly Peak - Hour
(f)
NAME OF SYSTEM: Montana Operations
29
January
797,073
115,155
1,855
27
9
30
February
670,944
105,816
2,048
11
20
31
March
778,997
67,617
1,704
1
8
32
April
572,911
94,270
1,615
1
9
33
May
644,571
43,740
1,612
17
19
34
June
609,256
83,332
2,113
30
18
35
July
644,758
52,598
2,115
27
18
36
August
749,218
44,287
1,977
16
17
37
September
661,707
66,747
1,703
7
18
38
October
655,052
79,874
1,602
12
9
39
November
727,420
70,986
1,698
11
18
40
December
672,008
133,076
2,014
27
18
41
Total
8,183,915
957,499
NAME OF SYSTEM: South Dakota Operations
29
January
146,642
0
283
28
8
30
February
133,467
0
314
12
9
31
March
212,548
0
249
1
9
32
April
122,532
0
230
14
10
33
May
104,918
0
242
24
16
34
June
106,425
0
328
10
17
35
July
142,059
0
322
28
15
36
August
187,888
0
333
18
17
37
September
172,898
0
282
28
17
38
October
159,768
0
232
6
17
39
November
140,998
0
255
12
10
40
December
132,638
0
241
28
19
41
Total
1,762,781
0


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Steam Electric Generating Plant Statistics

1. Report data for plant in Service only.
2. Large plants are steam plants with installed capacity (name plate rating) of 25,000 Kw or more. Report in this page gas-turbine and internal combustion plants of 10,000 Kw or more, and nuclear plants.
3. Indicate by a footnote any plant leased or operated as a joint facility.
4. If net peak demand for 60 minutes is not available, give data which is available, specifying period.
5. If any employees attend more than one plant, report on line 11 the approximate average number of employees assignable to each plant.
6. If gas is used and purchased on a therm basis report the Btu content or the gas and the quantity of fuel burned converted to Mct.
7. Quantities of fuel burned (Line 38) and average cost per unit of fuel burned (Line 41) must be consistent with charges to expense accounts 501 and 547 (Line 42) as show on Line 20.
8. If more than one fuel is burned in a plant furnish only the composite heat rate for all fuels burned.
9. Items under Cost of Plant are based on USofA accounts. Production expenses do not include Purchased Power, System Control and Load Dispatching, and Other Expenses Classified as Other Power Supply Expenses.
10. For IC and GT plants, report Operating Expenses, Account Nos. 547 and 549 on Line 25 "Electric Expenses," and Maintenance Account Nos. 553 and 554 on Line 32, "Maintenance of Electric Plant." Indicate plants designed for peak load service. Designate automatically operated plants.
11. For a plant equipped with combinations of fossil fuel steam, nuclear steam, hydro, internal combustion or gas-turbine equipment, report each as a separate plant. However, if a gas-turbine unit functions in a combined cycle operation with a conventional steam unit, include the gas-turbine with the steam plant.
12. If a nuclear power generating plant, briefly explain by footnote (a) accounting method for cost of power generated including any excess costs attributed to research and development; (b) types of cost units used for the various components of fuel cost; and (c) any other informative data concerning plant type fuel used, fuel enrichment type and quantity for the report period and other physical and operating characteristics of plant.

Line No.
Item
(a)
Plant Name:
Aberdeen #1
Plant Name:
Aberdeen #2
Plant Name:
Beethoven Wind
Plant Name:
Big Stone
Plant Name:
Colstrip 4
Plant Name:
Coyote
Plant Name:
DGGS
Plant Name:
Huron CT #1
Plant Name:
Huron GT #2
Plant Name:
Neal
Plant Name:
Spion Kop
Plant Name:
Two Dot
Plant Name:
Yankton
1
PlantKind
Kind of Plant (Internal Comb, Gas Turb, Nuclear)
(a)
Combustion Turbine
Combustion Turbine
Wind Turbin
(b)
Steam
(c)
Steam
(d)
Steam
(e)
Gas Turbine
(f)
Combustion Turbine
(g)
Combustion Turbine
(h)
Steam
Wind Turbine
Wind Turbine
(i)
Internal Combustion
2
PlantConstructionType
Type of Constr (Conventional, Outdoor, Boiler, etc)
Conventional
Conventional
Wind Turbine
Conventional
Boiler
Conventional
Conventional
Conventional
Conventional
Conventional
Wind Turbine
Wind Turbine
Conventional
3
YearPlantOriginallyConstructed
Year Originally Constructed
1978
2013
2015
1975
1984
1981
2010
1961
1991
1979
2012
2014
1974
4
YearLastUnitOfPlantInstalled
Year Last Unit was Installed
1978
2013
2015
1975
1986
1981
2010
1961
1992
1979
2012
2014
1990
5
InstalledCapacityOfPlant
Total Installed Cap (Max Gen Name Plate Ratings-MW)
28.80
82.20
80.00
122.85
241.50
45.58
(j)
203.25
15.00
42.93
55.56
40.00
11.28
13.53
6
NetPeakDemandOnPlant
Net Peak Demand on Plant - MW (60 minutes)
28
60
80
112
222
43
150
15
43
55
40
11
13
7
PlantHoursConnectedToLoad
Plant Hours Connected to Load
207
1,715
8,744
5,616
7,320
7,557
8,750
0
0
3,372
8,760
8,760
90
8
NetContinuousPlantCapability
Net Continuous Plant Capability (Megawatts)
0
0
79
0
0
0
150
0
0
0
40
11.28
0
9
NetContinuousPlantCapabilityNotLimitedByCondenserWater
When Not Limited by Condenser Water
(k)
28
60
0
111
222
43
150
(l)
15
(m)
49
55
0
0
13
10
NetContinuousPlantCapabilityLimitedByCondenserWater
When Limited by Condenser Water
(n)
21
52
0
110
43
150
(p)
11
(q)
43
55
0
0
13
11
PlantAverageNumberOfEmployees
Average Number of Employees
0
2
4
75
78
11
1
0
85
0
12
NetGenerationExcludingPlantUse
Net Generation, Exclusive of Plant Use - kWh
4,383,000
47,879,000
284,629,000
396,180,000
2,031,531,000
249,802,000
271,438,000
129,363,000
120,348,000
34,312,000
(u)
144,000
13
CostOfLandAndLandRightsSteamProduction
Cost of Plant: Land and Land Rights
1,314
36,647
162,629
446,126
203,882
1,893,984
13,682
111,793
8,119,540
9,631
14
CostOfStructuresAndImprovementsSteamProduction
Structures and Improvements
24,756
10,366,862
14,557,823
9,811,742
28,016,189
10,009,693
22,122,874
1,207,604
140,514
7,345,375
29,187,825
348,247
15
CostOfEquipmentSteamProduction
Equipment Costs
3,775,985
37,968,585
100,038,361
144,400,247
83,480,841
41,438,765
160,006,690
1,928,823
59,389
55,519,515
53,900,546
11,440,693
7,790,041
16
AssetRetirementCostsSteamProduction
Asset Retirement Costs
1,351,541
467,318
19,799,959
1,893,989
302,405
2,913,993
772,822
17
CostOfPlant
Total cost (total 13 thru 20)
3,802,055
48,372,094
115,947,725
154,841,936
131,743,115
53,546,329
184,023,549
3,150,110
199,903
63,167,295
86,114,157
20,333,055
8,147,919
18
CostPerKilowattOfInstalledCapacity
Cost per KW of Installed Capacity (line 17/5) Including
132.016
588.468
1,449.347
1,260.410
545.520
1,174.780
905.400
210.007
4.656
1,136.920
2,152.850
1,802.580
602.211
19
OperationSupervisionAndEngineeringExpense
Production Expenses: Oper, Supv, & Engr
125,724
1,006,112
2,778,249
266,744
29,749
202,126
362,725
13,281
337,706
25,908
24,361
14,192
20
FuelSteamPowerGeneration
Fuel
1,000,825
4,695,714
7,886,578
28,328,968
5,631,804
12,924,640
2,498,672
21,762
21
CoolantsAndWater
Coolants and Water (Nuclear Plants Only)
22
SteamExpensesSteamPowerGeneration
Steam Expenses
886,948
1,782,038
399,678
447,341
23
SteamFromOtherSources
Steam From Other Sources
24
SteamTransferredCredit
Steam Transferred (Cr)
25
ElectricExpensesSteamPowerGeneration
Electric Expenses
2,812
22,504
685,181
386,098
197,583
211,531
1,468,198
297
7,617
2,170,229
564,090
317
26
MiscellaneousSteamPowerExpenses
Misc Steam (or Nuclear) Power Expenses
667,799
2,153,527
242,176
407,282
27
RentsSteamPowerGeneration
Rents
4,694
28,771
28
Allowances
Allowances
29
MaintenanceSupervisionAndEngineeringSteamPowerGeneration
Maintenance Supervision and Engineering
2,062
15,187
186,697
597,546
94,175
159
376,789
2,806
30
MaintenanceOfStructuresSteamPowerGeneration
Maintenance of Structures
63,642
207,851
635,316
82,227
81,504
921
31
MaintenanceOfBoilerPlantSteamPowerGeneration
Maintenance of Boiler (or reactor) Plant
2,546,436
5,872,038
631,339
385,717
32
MaintenanceOfElectricPlantSteamPowerGeneration
Maintenance of Electric Plant
45,701
336,518
716,883
1,408,466
85,398
1,452,700
3,514
74,595
28,351
5,195
62,181
33
MaintenanceOfMiscellaneousSteamPlant
Maintenance of Misc Steam (or Nuclear) Plant
10,279
170,575
399,293
130,997
170,627
34
PowerProductionExpensesSteamPower
Total Production Expenses
1,177,124
6,076,035
3,537,350
13,922,609
41,404,523
7,716,145
16,208,263
17,250
0
4,816,620
2,225,408
593,646
101,259
35
ExpensesPerNetKilowattHour
Expenses per Net kWh
0.2686
0.1269
0.0124
0.0351
0.0204
0.0309
0.0597
0.0000
0.0000
0.0372
0.0185
0.0173
0.7032
35
FuelKindAxis
Plant Name
Aberdeen #1
Aberdeen #2
Big Stone
Big Stone
Big Stone
Colstrip 4
Colstrip 4
Coyote
Coyote
Coyote
DGGS
DGGS
Huron CT #1
Huron GT #2
Neal
Neal
Yankton
36
FuelKind
Fuel Kind
Oil
Gas
Coal
Oil
Other
Coal
Oil
Coal
Oil
Other
Gas
Oil
Gas
Gas
Coal
Oil
Oil
37
FuelUnit
Fuel Unit
Barrel
MMBTU
Tons
Barrel
Tons
Tons
Barrel
Tons
Barrel
Tons
MMBTU
Barrel
MMBTU
MMBTU
Tons
Barrels
Barrel
38
QuantityOfFuelBurned
Quantity (Units) of Fuel Burned
10,840
501,161
262,405
1,293
483,695
935,161
2,118
203,897
1,287
1,257
3,226,352
192
21
74,251
2,499
236
39
FuelBurnedAverageHeatContent
Avg Heat Cont - Fuel Burned (btu/indicate if nuclear)
138,000
1,000
4,795
140,000
0
8,619
140,000
6,963
140,000
0
1,000
140,000
1,000
1,000
8,593
139,000
138,000
40
AverageCostOfFuelPerUnitAsDelivered
Avg Cost of Fuel/unit, as Delvd f.o.b. during year
92.331
9.370
29.627
31.019
201.876
30.096
86.902
26.353
73.119
130.736
1.610
136.680
30.755
86.057
88.368
41
AverageCostOfFuelPerUnitBurned
Average Cost of Fuel per Unit Burned
92.331
9.370
29.627
31.019
201.876
30.096
86.902
26.353
73.119
130.736
1.610
136.680
30.755
86.057
88.368
42
AverageCostOfFuelBurnedPerMillionBritishThermalUnit
Average Cost of Fuel Burned per Million BTU
15.930
9.370
3.090
5.275
1.746
14.779
1.893
12.435
1.608
23.245
1.790
14.741
15.246
43
AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average Cost of Fuel Burned per kWh Net Gen
(v)
0.228
(w)
0.098
(x)
0.020
(y)
0.014
(z)
0.023
(aa)
0.019
(ab)
0.019
(ac)
0.151
44
AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per kWh Net Generation
(ad)
14,333.959
(ae)
10.467
(af)
6,370.684
(ag)
7,941.454
(ah)
11,396.349
(ai)
11,890.297
(aj)
9,976.812
(ak)
9,493.250


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: PlantKind
Designed for peak load service.
(b) Concept: PlantKind
Big Stone - Respondent's share is 23.4%. Generation expenses and revenue are shared on ownership basis. This page represents the respondent's share of plant costs, production expenses and other data.
(c) Concept: PlantKind
We own 30% of Colstrip Unit 4 and have a reciprical sharing agreement with the 30% owner of Colstrip Unit 3 in which we share equally in the ownership benefits and liabilities of each. This page is representative of that agreement.
(d) Concept: PlantKind
Coyote - Respondent's share is 10%. Generation expenses and revenue are shared on ownership basis. This page represents the respondent's share of plant costs, production expenses and other data.
(e) Concept: PlantKind
Designed for regulation service.
(f) Concept: PlantKind
Designed for peak load service.
(g) Concept: PlantKind
Designed for peak load service. This plant was retired in 2019.
(h) Concept: PlantKind
Neal #4 - Respondent's share is 8.681%. Generation expenses and revenue are shared on ownership basis. This page represents the respondent's share of plant costs, production expenses and other data.
(i) Concept: PlantKind
Designed for peak load service.
(j) Concept: InstalledCapacityOfPlant
Total Installed Capacity (Maximum Generation Name Plate Ratings-MW) is 203.25 MW as reported, however because of limitations on the combustion turbines, the maximum installed capacity is 150 MW.
(k) Concept: NetContinuousPlantCapabilityNotLimitedByCondenserWater
Site 40 F., Base
(l) Concept: NetContinuousPlantCapabilityNotLimitedByCondenserWater
Site 40 F., Base
(m) Concept: NetContinuousPlantCapabilityNotLimitedByCondenserWater
Site 40 F., Base
(n) Concept: NetContinuousPlantCapabilityLimitedByCondenserWater
Site 80 F., Base
(o) Concept: NetContinuousPlantCapabilityLimitedByCondenserWater
When Limited by Condensor Water with "No Limitation."
(p) Concept: NetContinuousPlantCapabilityLimitedByCondenserWater
Site 80 F., Base W/EC
(q) Concept: NetContinuousPlantCapabilityLimitedByCondenserWater
Site 40 F., Base
(r) Concept: PlantAverageNumberOfEmployees
All plant employees are employed by the plant operator, Talen Montana, LLC.
(s) Concept: PlantAverageNumberOfEmployees
All employees are contracted through General Electric as plant operator
(t) Concept: PlantAverageNumberOfEmployees
All employees are contracted through General Electric as plant operator
(u) Concept: NetGenerationExcludingPlantUse
Station power use exceeded generation.
(v) Concept: AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average cost of all fuels burned per net KWh generated.
(w) Concept: AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average cost of all fuels burned per net KWh generated.
(x) Concept: AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average cost of all fuels burned per net KWh generated.
(y) Concept: AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average cost of all fuels burned per net KWh generated.
(z) Concept: AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average cost of all fuels burned per net KWh generated.
(aa) Concept: AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average cost of all fuels burned per net KWh generated.
(ab) Concept: AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average cost of all fuels burned per net KWh generated.
(ac) Concept: AverageCostOfFuelBurnedPerKilowattHourNetGeneration
Average cost of all fuels burned per net KWh generated.
(ad) Concept: AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per net KWh generated for all fuels.
(ae) Concept: AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per net KWh generated for all fuels.
(af) Concept: AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per net KWh generated for all fuels.
(ag) Concept: AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per net KWh generated for all fuels.
(ah) Concept: AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per net KWh generated for all fuels.
(ai) Concept: AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per net KWh generated for all fuels.
(aj) Concept: AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per net KWh generated for all fuels.
(ak) Concept: AverageBritishThermalUnitPerKilowattHourNetGeneration
Average BTU per net KWh generated for all fuels.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Hydroelectric Generating Plant Statistics
  1. Large plants are hydro plants of 10,000 Kw or more of installed capacity (name plate ratings).
  2. If any plant is leased, operated under a license from the Federal Energy Regulatory Commission, or operated as a joint facility, indicate such facts in a footnote. If licensed project, give project number.
  3. If net peak demand for 60 minutes is not available, give that which is available specifying period.
  4. If a group of employees attends more than one generating plant, report on line 11 the approximate average number of employees assignable to each plant.
  5. The items under Cost of Plant represent accounts or combinations of accounts prescribed by the Uniform System of Accounts. Production Expenses do not include Purchased Power, System control and Load Dispatching, and Other Expenses classified as "Other Power Supply Expenses."
  6. Report as a separate plant any plant equipped with combinations of steam, hydro, internal combustion engine, or gas turbine equipment.
Line No.
Item
(a)
FERC Licensed Project No.
0
Plant Name:
Common Hydro Plant
FERC Licensed Project No.
1869
Plant Name:
Thompson Falls
FERC Licensed Project No.
2188
Plant Name:
Black Eagle
FERC Licensed Project No.
2188
Plant Name:
Cochrane
FERC Licensed Project No.
2188
Plant Name:
Hauser
FERC Licensed Project No.
2188
Plant Name:
Holter
FERC Licensed Project No.
2188
Plant Name:
Madison
FERC Licensed Project No.
2188
Plant Name:
Morony
FERC Licensed Project No.
2188
Plant Name:
Rainbow
FERC Licensed Project No.
2188
Plant Name:
Ryan
FERC Licensed Project No.
2301
Plant Name:
Mystic Lake
1
PlantKind
Kind of Plant (Run-of-River or Storage)
Storage
Run-of-River
Run-of-River
Run-of-River
Run-of-River
Run-of-River
Run-of-River
Run-of-River
Run-of-River
Storage
2
PlantConstructionType
Plant Construction type (Conventional or Outdoor)
Conventional
Conventional
Semi-Outdoor
Conventional
Conventional
Conventional
Semi-Outdoor
Conventional
Conventional
Conventional
3
YearPlantOriginallyConstructed
Year Originally Constructed
1915
1927
1958
1907
1918
1903
1930
1915
1915
1925
4
YearLastUnitOfPlantInstalled
Year Last Unit was Installed
1995
1927
1958
2021
1918
2021
1930
2014
2020
2007
5
InstalledCapacityOfPlant
Total installed cap (Gen name plate Rating in MW)
92.37
21.80
59.90
18.74
53.60
12.68
46.50
58.95
55.20
11.25
6
NetPeakDemandOnPlant
Net Peak Demand on Plant-Megawatts (60 minutes)
94
20.94
62.00
18.30
48.00
6.34
49
64
71.50
12
7
PlantHoursConnectedToLoad
Plant Hours Connect to Load
8,760
8,760
8,760
8,760
8,760
8,760
8,760
8,760
8,760
8,760
8
NetPlantCapabilityAbstract
Net Plant Capability (in megawatts)
9
NetPlantCapabilityUnderMostFavorableOperatingConditions
(a) Under Most Favorable Oper Conditions
94
21
62
18
48
7
49
64
72
12
10
NetPlantCapabilityUnderMostAdverseOperatingConditions
(b) Under the Most Adverse Oper Conditions
41
2
11
10
19
3
10
18
23
1
11
PlantAverageNumberOfEmployees
Average Number of Employees
5
5
5
3
3
4
4
5
4
3
12
NetGenerationExcludingPlantUse
Net Generation, Exclusive of Plant Use - kWh
470,876,000
100,002,000
222,000,000
115,892,000
201,007,000
1,185,000
231,680,000
310,711,000
387,793,000
53,604,000
13
CostOfPlantAbstract
Cost of Plant
14
CostOfLandAndLandRightsHydroelectricProduction
Land and Land Rights
1,850,025
391,699
63,376
242,224
220,552
827,064
183,300
640,095
1,196,421
66,216
15
CostOfStructuresAndImprovementsHydroelectricProduction
Structures and Improvements
9,850,645
28,783,295
685,915
1,194,639
1,135,213
1,559,035
1,241,738
681,339
76,108,748
2,443,878
1,680,151
16
CostOfReservoirsDamsAndWaterwaysHydroelectricProduction
Reservoirs, Dams, and Waterways
10,532,515
23,682,743
4,135,533
6,126,510
9,973,740
10,246,459
16,896,916
3,818,495
23,823,081
9,214,588
11,333,661
17
EquipmentCostsHydroelectricProduction
Equipment Costs
17,679,645
39,315,941
11,256,021
18,662,775
20,925,147
9,929,625
15,416,135
31,489,720
43,801,064
41,240,811
10,562,527
18
CostOfRoadsRailroadsAndBridgesHydroelectricProduction
Roads, Railroads, and Bridges
102,408
131,446
93,874
39,494
5,550
628,052
3,930
3,792
30,735
1,453,511
19
AssetRetirementCostsHydroelectricProduction
Asset Retirement Costs
20
CostOfPlant
Total cost (total 13 thru 20)
38,062,806
93,734,411
16,600,614
26,141,174
32,315,818
21,961,221
35,009,905
36,176,785
144,376,780
54,126,433
25,096,067
21
CostPerKilowattOfInstalledCapacity
Cost per KW of Installed Capacity (line 20 / 5)
1,014,771.1536
761,496.0537
436,413.5868
1,724,429.9867
409,724.2772
2,761,033.4850
777,995.3667
2,449,139.6036
980,551.3255
2,230,761.4667
22
ProductionExpensesAbstract
Production Expenses
23
OperationSupervisionAndEngineeringExpense
Operation Supervision and Engineering
518,661
351
43,315
50,856
24
WaterForPower
Water for Power
333,192
49,403
88,235
44,628
112,742
8,568
112,742
76,732
76,732
39,990
25
HydraulicExpenses
Hydraulic Expenses
3,581,002
17,370
35,176
4,456
13,609
13,842
23,499
58,501
43,376
12,223
26
ElectricExpensesHydraulicPowerGeneration
Electric Expenses
546,119
392,199
269,274
132,543
339,295
319,741
306,568
153,801
289,124
251,393
315,034
27
MiscellaneousHydraulicPowerGenerationExpenses
Misc Hydraulic Power Generation Expenses
2,264,194
30,089
102,253
36,856
54,899
53,380
62,003
14,570
507,396
114,437
16,130
28
RentsHydraulicPowerGeneration
Rents
1,890
39,845
45,018
22,002
17,478
29
MaintenanceSupervisionAndEngineeringHydraulicPowerGeneration
Maintenance Supervision and Engineering
517,919
30
MaintenanceOfStructuresHydraulicPowerGeneration
Maintenance of Structures
177,494
27,083
35,264
57,096
58,047
51,438
25,074
18,221
3,270
60,784
132,983
31
MaintenanceOfReservoirsDamsAndWaterways
Maintenance of Reservoirs, Dams, and Waterways
35,049
105,461
21,583
52,467
62,500
23,208
158,401
364
56,384
175,910
83,377
32
MaintenanceOfElectricPlantHydraulicPowerGeneration
Maintenance of Electric Plant
135,038
167,399
95,002
54,617
75,229
72,403
22,802
30,612
95,506
229,331
28,898
33
MaintenanceOfMiscellaneousHydraulicPlant
Maintenance of Misc Hydraulic Plant
219,855
37,556
39,872
28,737
23,384
45,485
855
7,305
22,133
98,962
15,089
34
PowerProductionExpensesHydraulicPower
Total Production Expenses (total 23 thru 33)
7,925,233
1,112,240
648,179
455,008
711,435
737,257
629,772
380,929
1,109,047
1,101,781
661,201
35
ExpensesPerNetKilowattHour
Expenses per net kWh
0.0024
0.0065
0.0020
0.0061
0.0037
0.5315
0.0016
0.0036
0.0028
0.0123


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
Pumped Storage Generating Plant Statistics
  1. Large plants and pumped storage plants of 10,000 Kw or more of installed capacity (name plate ratings).
  2. If any plant is leased, operating under a license from the Federal Energy Regulatory Commission, or operated as a joint facility, indicate such facts in a footnote. Give project number.
  3. If net peak demand for 60 minutes is not available, give that which is available, specifying period.
  4. If a group of employees attends more than one generating plant, report on Line 8 the approximate average number of employees assignable to each plant.
  5. The items under Cost of Plant represent accounts or combinations of accounts prescribed by the Uniform System of Accounts. Production Expenses do not include Purchased Power System Control and Load Dispatching, and Other Expenses classified as "Other Power Supply Expenses."
  6. Pumping energy (Line 10) is that energy measured as input to the plant for pumping purposes.
  7. Include on Line 36 the cost of energy used in pumping into the storage reservoir. When this item cannot be accurately computed leave Lines 36, 37 and 38 blank and describe at the bottom of the schedule the company's principal sources of pumping power, the estimated amounts of energy from each station or other source that individually provides more than 10 percent of the total energy used for pumping, and production expenses per net MWH as reported herein for each source described. Group together stations and other resources which individually provide less than 10 percent of total pumping energy. If contracts are made with others to purchase power for pumping, give the supplier contract number, and date of contract.
Line No.
Item
(a)
FERC Licensed Project No.
0
Plant Name:
0
1
PlantConstructionType
Type of Plant Construction (Conventional or Outdoor)
2
YearPlantOriginallyConstructed
Year Originally Constructed
3
YearLastUnitOfPlantInstalled
Year Last Unit was Installed
4
InstalledCapacityOfPlant
Total installed cap (Gen name plate Rating in MW)
5
NetPeakDemandOnPlant
Net Peak Demaind on Plant-Megawatts (60 minutes)
0
6
PlantHoursConnectedToLoad
Plant Hours Connect to Load While Generating
0
7
NetContinuousPlantCapability
Net Plant Capability (in megawatts)
0
8
PlantAverageNumberOfEmployees
Average Number of Employees
9
NetGenerationExcludingPlantUse
Generation, Exclusive of Plant Use - kWh
0
10
EnergyUsedForPumping
Energy Used for Pumping
11
NetOutputForLoad
Net Output for Load (line 9 - line 10) - Kwh
0
12
CostOfPlantAbstract
Cost of Plant
13
CostOfLandAndLandRightsPumpedStoragePlant
Land and Land Rights
14
CostOfStructuresAndImprovementsPumpedStoragePlant
Structures and Improvements
0
15
CostOfReservoirsDamsAndWaterwaysPumpedStoragePlant
Reservoirs, Dams, and Waterways
0
16
CostOfWaterWheelsTurbinesAndGeneratorsPumpedStoragePlant
Water Wheels, Turbines, and Generators
0
17
CostOfAccessoryElectricEquipmentPumpedStoragePlant
Accessory Electric Equipment
0
18
CostOfMiscellaneousPowerPlantEquipmentPumpedStoragePlant
Miscellaneous Powerplant Equipment
0
19
CostOfRoadsRailroadsAndBridgesPumpedStoragePlant
Roads, Railroads, and Bridges
0
20
AssetRetirementCostsPumpedStoragePlant
Asset Retirement Costs
0
21
CostOfPlant
Total cost (total 13 thru 20)
22
CostPerKilowattOfInstalledCapacity
Cost per KW of installed cap (line 21 / 4)
23
ProductionExpensesAbstract
Production Expenses
24
OperationSupervisionAndEngineeringExpense
Operation Supervision and Engineering
0
25
WaterForPower
Water for Power
0
26
PumpedStorageExpenses
Pumped Storage Expenses
0
27
ElectricExpensesPumpedStoragePlant
Electric Expenses
0
28
MiscellaneousPumpedStoragePowerGenerationExpenses
Misc Pumped Storage Power generation Expenses
0
29
RentsPumpedStoragePlant
Rents
0
30
MaintenanceSupervisionAndEngineeringPumpedStoragePlant
Maintenance Supervision and Engineering
0
31
MaintenanceOfStructuresPumpedStoragePlant
Maintenance of Structures
0
32
MaintenanceOfReservoirsDamsAndWaterwaysPumpedStoragePlant
Maintenance of Reservoirs, Dams, and Waterways
0
33
MaintenanceOfElectricPlantPumpedStoragePlant
Maintenance of Electric Plant
0
34
MaintenanceOfMiscellaneousPumpedStoragePlant
Maintenance of Misc Pumped Storage Plant
0
35
PowerProductionExpenseBeforePumpingExpenses
Production Exp Before Pumping Exp (24 thru 34)
36
PumpingExpenses
Pumping Expenses
37
PowerProductionExpensesPumpedStoragePlant
Total Production Exp (total 35 and 36)
38
ExpensesPerNetKilowattHour
Expenses per kWh (line 37 / 9)
39
ExpensesPerNetKilowattHourGenerationAndPumping
Expenses per KWh of Generation and Pumping (line 37/(line 9 + line 10))
0


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
GENERATING PLANT STATISTICS (Small Plants)
  1. Small generating plants are steam plants of, less than 25,000 Kw; internal combustion and gas turbine-plants, conventional hydro plants and pumped storage plants of less than 10,000 Kw installed capacity (name plate rating).
  2. Designate any plant leased from others, operated under a license from the Federal Energy Regulatory Commission, or operated as a joint facility, and give a concise statement of the facts in a footnote. If licensed project, give project number in footnote.
  3. List plants appropriately under subheadings for steam, hydro, nuclear, internal combustion and gas turbine plants. For nuclear, see instruction 11, Page 402.
  4. If net peak demand for 60 minutes is not available, give the which is available, specifying period.
  5. If any plant is equipped with combinations of steam, hydro internal combustion or gas turbine equipment, report each as a separate plant. However, if the exhaust heat from the gas turbine is utilized in a steam turbine regenerative feed water cycle, or for preheated combustion air in a boiler, report as one plant.
Production Expenses
Line No.
PlantName
Name of Plant
(a)
YearPlantOriginallyConstructed
Year Orig. Const.
(b)
InstalledCapacityOfPlant
Installed Capacity Name Plate Rating (MW)
(c)
NetPeakDemandOnPlant
Net Peak Demand MW (60 min)
(d)
NetGenerationExcludingPlantUse
Net Generation Excluding Plant Use
(e)
CostOfPlant
Cost of Plant
(f)
PlantCostPerMw
Plant Cost (Incl Asset Retire. Costs) Per MW
(g)
OperatingExpensesExcludingFuel
Operation Exc'l. Fuel
(h)
FuelProductionExpenses
Fuel Production Expenses
(i)
MaintenanceProductionExpenses
Maintenance Production Expenses
(j)
FuelKind
Kind of Fuel
(k)
FuelCostPerMmbtus
Fuel Costs (in cents (per Million Btu)
(l)
GenerationType
Generation Type
(m)
1
Internal Combustion
2
Clark
1970
2.75
2.7
65,000
955,824
347,572
6,965
10,537
19,560
Oil
1,669.00
Internal Combustion
3
Faulkton
1969
2.75
2.5
81,000
1,682,420
611,789
8,313
15,385
6,462
Oil
1,588.00
Internal Combustion
4
Highmore
1948
4.79
4.7
50,385
10,530
Oil
Internal Combustion
5
Redfield
1962
4.08
4.0
554,692
135,954
Oil/Gas
Internal Combustion
6
Mobile B
1991
1.75
1.8
58,000
563,424
321,956
3,593
8,793
7,251
Oil
1,515.00
Internal Combustion
7
Mobile C
2008
2.50
2.0
2,000
1,064,946
425,978
4,394
252
14,851
Oil
1,850.00
Internal Combustion
8
Mobile 1
2020
1.00
1.0
13,000
1,293,539
1,293,539
1,202
3,202
8,414
Oil
2,020.00
Internal Combustion
9
Mobile 2
2020
1.00
1.0
12,000
1,293,539
1,293,539
2,014
2,894
16,832
Oil
1,983.00
Internal Combustion
10
Mobile 3
2020
1.00
1.0
8,000
1,293,539
1,293,539
12
2,488
9,618
Oil
2,103.00
Internal Combustion
11
Mobile 4
2020
1.00
1.0
12,000
1,293,539
1,293,539
3,105
2,732
17,455
Oil
1,983.00
Internal Combustion
12
Mobile 5
2020
1.00
1.0
8,000
1,293,539
1,293,539
1,254
2,502
9,121
Oil
2,233.00
Internal Combustion
13
Mobile 6
2020
1.00
1.0
11,000
1,293,539
1,293,539
2,036
2,645
14,920
Oil
1,990.00
Internal Combustion
14
Mobile 7
2020
1.00
1.0
11,000
1,293,539
1,293,539
2,013
2,512
15,002
Oil
1,979.00
Internal Combustion
15
Mobile 8
2020
1.00
1.0
15,000
1,293,539
1,293,539
3,410
10,599
Oil
2,017.00
Internal Combustion
16
Total South Dakota
15,220,000
34,901
57,352
150,084
17
Yellowstone Park
18
Lake
1967
2.80
335,351
451,240
161,157
15,755
111,704
34,370
Oil
Internal Combustion
19
Old Faithful
1979
2.00
369,106
657,680
328,840
17,342
122,947
37,830
Oil
Internal Combustion
20
Roosevelt (Tower Falls)
1986
1.00
71,127
71,127
Oil
Internal Combustion
21
Grant Village
1993
3.35
275,217
1,906,510
569,108
12,931
91,674
28,208
Oil
Internal Combustion
22
Total Yellowstone Park
3,086,557
46,028
326,325
100,408
23
Other
24
Hebgen
(a)
1915
48,672,966
676,723
92,331
Hydro
25
Grand Total
(b)
66,979,524
757,652
383,677
342,824


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: YearPlantOriginallyConstructed
FERC licensed project number 2188.
(b) Concept: CostOfPlant
Net Generation: Montana South Dakota Total
Page 402-403 2,457,629  1,112,380  3,570,009 
Page 410-411 980  296  1,276 
Hydro Page 406-407 2,094,750  —  2,094,750 
Ties to Page 401, line 9 4,553,359  1,112,676  5,666,035 
Production Expenses: Montana South Dakota Total
Total Per Form 1 Page 402, line 34 60,431,841  37,364,394  97,796,235 
Total Per Form 1 Page 410, line 26 1,241,815  242,338  1,484,153 
Total Per Form 1 Page 406-407, line 22 15,472,081  15,472,081 
Other Production Expenses including capital lease 4,451,379  —  4,451,379 
Ties to total of Page 320, lines 21, 59, and 74, column (b) 81,597,116  37,606,732  119,203,848 

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
ENERGY STORAGE OPERATIONS (Large Plants)
  1. Large Plants are plants of 10,000 Kw or more.
  2. In columns (a) (b) and (c) report the name of the energy storage project, functional classification (Production, Transmission, Distribution), and location.
  3. In column (d), report Megawatt hours (MWH) purchased, generated, or received in exchange transactions for storage.
  4. In columns (e), (f) and (g) report MWHs delivered to the grid to support production, transmission and distribution. The amount reported in column (d) should include MWHs delivered/provided to a generator’s own load requirements or used for the provision of ancillary services.
  5. In columns (h), (i), and (j) report MWHs lost during conversion, storage and discharge of energy.
  6. In column (k) report the MWHs sold.
  7. In column (l), report revenues from energy storage operations. In a footnote, disclose the revenue accounts and revenue amounts related to the income generating activity.
  8. In column (m), report the cost of power purchased for storage operations and reported in Account 555.1, Power Purchased for Storage Operations. If power was purchased from an affiliated seller specify how the cost of the power was determined. In columns (n) and (o), report fuel costs for storage operations associated with self-generated power included in Account 501 and other costs associated with self-generated power.
  9. In columns (q), (r) and (s) report the total project plant costs including but not exclusive of land and land rights, structures and improvements, energy storage equipment, turbines, compressors, generators, switching and conversion equipment, lines and equipment whose primary purpose is to integrate or tie energy storage assets into the power grid, and any other costs associated with the energy storage project included in the property accounts listed.
Line No.
Name of the Energy Storage Project
(a)
Functional Classification
(b)
Location of the Project
(c)
MWHs
(d)
MWHs delivered to the grid to support Production
(e)
MWHs delivered to the grid to support Transmission
(f)
MWHs delivered to the grid to support Transmission
(g)
MWHs Lost During Conversion, Storage and Discharge of Energy Production
(h)
MWHs Lost During Conversion, Storage and Discharge of Energy Transmission
(i)
MWHs Lost During Conversion, Storage and Discharge of Energy Distribution
(j)
MWHs Sold
(k)
Revenues from Energy Storage Operations
(l)
Power Purchased for Storage Operations (555.1) (Dollars)
(m)
Fuel Costs from associated fuel accounts for Storage Operations Associated with Self- Generated Power (Dollars)
(n)
Other Costs Associated with Self-Generated Power (Dollars)
(o)
Project Costs included in
(p)
Production (Dollars)
(q)
Transmission (Dollars)
(r)
Distribution (Dollars)
(s)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35 TOTAL
0
0
0
0
0
0
0
0
0
0
0
0
0
0


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
TRANSMISSION LINE STATISTICS
  1. Report information concerning transmission lines, cost of lines, and expenses for year. List each transmission line having nominal voltage of 132 kilovolts or greater. Report transmission lines below these voltages in group totals only for each voltage. If required by a State commission to report individual lines for all voltages, do so but do not group totals for each voltage under 132 kilovolts.
  2. Transmission lines include all lines covered by the definition of transmission system plant as given in the Uniform System of Accounts. Do not report substation costs and expenses on this page.
  3. Exclude from this page any transmission lines for which plant costs are included in Account 121, Nonutility Property.
  4. Indicate whether the type of supporting structure reported in column (e) is: (1) single pole wood or steel; (2) H-frame wood, or steel poles; (3) tower; or (4) underground construction If a transmission line has more than one type of supporting structure, indicate the mileage of each type of construction by the use of brackets and extra lines. Minor portions of a transmission line of a different type of construction need not be distinguished from the remainder of the line.
  5. Report in columns (f) and (g) the total pole miles of each transmission line. Show in column (f) the pole miles of line on structures the cost of which is reported for the line designated; conversely, show in column (g) the pole miles of line on structures the cost of which is reported for another line. Report pole miles of line on leased or partly owned structures in column (g). In a footnote, explain the basis of such occupancy and state whether expenses with respect to such structures are included in the expenses reported for the line designated.
  6. Do not report the same transmission line structure twice. Report Lower voltage Lines and higher voltage lines as one line. Designate in a footnote if you do not include Lower voltage lines with higher voltage lines. If two or more transmission line structures support lines of the same voltage, report the pole miles of the primary structure in column (f) and the pole miles of the other line(s) in column (g).
  7. Designate any transmission line or portion thereof for which the respondent is not the sole owner. If such property is leased from another company, give name of lessor, date and terms of Lease, and amount of rent for year. For any transmission line other than a leased line, or portion thereof, for which the respondent is not the sole owner but which the respondent operates or shares in the operation of, furnish a succinct statement explaining the arrangement and giving particulars (details) of such matters as percent ownership by respondent in the line, name of co-owner, basis of sharing expenses of the Line, and how the expenses borne by the respondent are accounted for, and accounts affected. Specify whether lessor, co-owner, or other party is an associated company.
  8. Designate any transmission line leased to another company and give name of Lessee, date and terms of lease, annual rent for year, and how determined. Specify whether lessee is an associated company.
  9. Base the plant cost figures called for in columns (j) to (l) on the book cost at end of year.
DESIGNATION VOLTAGE (KV) - (Indicate where other than 60 cycle, 3 phase) LENGTH (Pole miles) - (In the case of underground lines report circuit miles) COST OF LINE (Include in column (j) Land, Land rights, and clearing right-of-way) EXPENSES, EXCEPT DEPRECIATION AND TAXES
Line No.
TransmissionLineStartPoint
From
TransmissionLineEndPoint
To
OperatingVoltageOfTransmissionLine
Operating
DesignedVoltageOfTransmissionLine
Designated
SupportingStructureOfTransmissionLineType
Type of Supporting Structure
LengthForStandAloneTransmissionLines
On Structure of Line Designated
LengthForTransmissionLinesAggregatedWithOtherStructures
On Structures of Another Line
NumberOfTransmissionCircuits
Number of Circuits
SizeOfConductorAndMaterial
Size of Conductor and Material
CostOfLandAndLandRightsTransmissionLines
Land
ConstructionAndOtherCostsTransmissionLines
Construction Costs
OverallCostOfTransmissionLine
Total Costs
OperatingExpensesOfTransmissionLine
Operation Expenses
MaintenanceExpensesOfTransmissionLine
Maintenance Expenses
RentExpensesOfTransmissionLine
Rents
OverallExpensesOfTransmissionLine
Total Expenses
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
(k)
(l)
(m)
(n)
(o)
(p)
1
(a)
Colstrip 4
Switchyard
500
500
2
1
795 KCM ACSR
71,386
71,386
2
(b)
Colstrip
Broadview A
500
500
112
1
795 KCM ACSR
472,230
12,244,801
12,717,031
3
(c)
Colstrip
Broadview B
500
500
116
1
795 KCM ACSR
593,662
15,843,834
16,437,496
4
(d)
Broadview
Townsend A
500
500
133
1
795 KCM ACSR
900,048
13,915,494
14,815,542
5
(e)
Broadview
Townsend B
500
500
133
1
795 KCM ACSR
936,763
13,718,392
14,655,155
105,461
21,197
170,420
297,078
6
Billings
Great Falls
230
230
188
1
1272 KCM ACSR
372,897
12,162,264
12,535,161
7
Broadview
Alkali Creek Sub
230
230
18
1
1272 KCM ACSR
21,848
1,096,967
1,118,815
8
Alkali Creek Sub
Laurel Baseline
230
230
5
1
1272 MCM ACSR
578,771
1,359,128
1,937,899
4,591
85,870
36,284
126,745
9
Colstrip
Billings
230
230
97
1
1272 KCM ACSR
334,459
8,138,044
8,472,503
698
34,005
34,703
10
Billings
Yellowtail
230
230
41
1
1272 KCM ACSR
67,935
4,316,474
4,384,409
17,699
60,740
78,439
11
Hot Springs
Idaho Border
230
230
307
1
1272 KCM ACSR
6,161,596
15,981,242
22,142,838
2,187
691,455
660,579
1,354,221
12
Ovando
Great Falls
230
230
106
1
1272 KCM ACSR
293,052
7,176,528
7,469,580
37,004
29,609
66,613
13
Anaconda
Billings
230
230
225
1
1272 KCM ACSR
514,337
14,364,635
14,878,972
4,926
38,586
43,512
14
Kerr
Anaconda A
161
161
148
1
350 MCM Cu
212,537
16,021,415
16,233,952
6,288
73,369
79,657
15
Anaconda
Monida
161
161
126
1
250 MCM Cu
130,004
5,089,419
5,219,423
28,823
20,117
41,556
90,496
16
Anaconda
Billings
161
161
237
1
556.5 MCM ACSR
213,709
18,696,327
18,910,036
17
Anaconda
Butte
161
161
26
1
556.5 MCM ACSR
10,667
801,317
811,984
18
Clyde Park
Bozeman
161
161
55
1
556.5 MCM ACSR
448,934
4,031,126
4,480,060
19
Missoula
Hamilton A
161
161
40
1
556.5 MCM ACSR
652,145
3,066,012
3,718,157
20
Clyde Park
Emigrant
161
161
40
1
556.5 MCM ACSR
725,426
4,935,085
5,660,511
21
Bozeman
Ennis
161
161
53
1
556.5 MCM ACSR
1,483,156
5,907,321
7,390,477
22
Kerr
Anaconda B
161
161
150
1
556.5 MCM ACSR
965,935
6,792,976
7,758,911
117,256
130,973
248,229
23
Rattlesnake
Missoula #4
161
161
69
1
556.5 MCM ACSR
2,685,921
7,081,958
9,767,879
24
Dillon
Salmon-Ennis
161
161
82
1
556.5 MCM ACSR
1,368,771
7,470,231
8,839,002
18,043
291,354
309,397
25
Rainbow
Havre
161
161
94
1
636 MCM ACSR
930,091
3,360,885
4,290,976
26
Three Rivers
Jackrabbit
161
161
29
1
556 KCMIL ACSR
1,643,626
8,599,681
10,243,307
27
Jackrabbit
Big Sky
161
161
37
1
556 KCMIL ACSR
33,675,622
33,675,622
17,254
17,254
28
All 115 kV
115
115
338
688,639
33,971,107
34,659,746
68,593
89,763
25
158,381
29
All 100 kV
100
100
1,752
9,921,802
211,718,325
221,640,127
515,079
1,920,781
94,659
2,530,519
30
All 69 kV
69
69
1,308
2,976,849
97,387,873
100,364,722
244,793
275,352
25,707
545,852
31
All 50 kV
50
50
752
3,632,033
52,499,628
56,131,661
284,646
177,401
26,765
488,812
32
(f)
Big Stone, SD
Gary, SD
230
230
18
1
1272 MCM
8,674
1,278,111
1,286,785
33
(g)
Coyote, ND
Center, ND
345
345
23
1
954 MCM
223,226
3,211,876
3,435,102
34
(h)
Neal, IA
Hinton, IA
345
345
24
1
954 MCM
16,579
616,871
633,450
35
Less non-NWE 345 kV partial
22
36
Various - 115 KV
115
348
37
Various - 69 KV
69
264
38
Various - 35 KV
35
654
Various
1,473,721
89,529,193
91,002,914
589,721
264,106
4,682
849,145
36 TOTAL
8,127
30
41,660,043
736,131,548
777,791,591
2,045,808
4,221,932
1,051,313
7,319,053


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: TransmissionLineStartPoint
500 KV facilities are jointly owned with Puget Sound Power & Light, Washington Water Power Company, Portland General Electric, and Pacific Power & Light. Plant costs and expenses are respondent's share only.
(b) Concept: TransmissionLineStartPoint
500 KV facilities are jointly owned with Puget Sound Power & Light, Washington Water Power Company, Portland General Electric, and Pacific Power & Light. Plant costs and expenses are respondent's share only.
(c) Concept: TransmissionLineStartPoint
500 KV facilities are jointly owned with Puget Sound Power & Light, Washington Water Power Company, Portland General Electric, and Pacific Power & Light. Plant costs and expenses are respondent's share only.
(d) Concept: TransmissionLineStartPoint
500 KV facilities are jointly owned with Puget Sound Power & Light, Washington Water Power Company, Portland General Electric, and Pacific Power & Light. Plant costs and expenses are respondent's share only.
(e) Concept: TransmissionLineStartPoint
500 KV facilities are jointly owned with Puget Sound Power & Light, Washington Water Power Company, Portland General Electric, and Pacific Power & Light. Plant costs and expenses are respondent's share only.
(f) Concept: TransmissionLineStartPoint
Big Stone - Respondent's share is 23.4%. Generation expenses and revenue are shared on ownership basis. Operator issues an operating report monthly. Production accounts are generally affected. None of the co-owners are associated companies. Data reported is respondent's share plus any company expense.
(g) Concept: TransmissionLineStartPoint
Coyote - Respondent's share is 10%. Generation expenses and revenue are shared on ownership basis. Operator issues an operating report monthly.Production accounts are generally affected. None of the co-owners are associated companies. Data reported is respondent's share plus any company expense.
(h) Concept: TransmissionLineStartPoint
Neal #4 - Respondent's share is 8.681%. Generation expenses and revenue are shared on ownership basis. Operator issues an operating report monthly. Production accounts are generally affected. None of the co-owners are associated companies. Data reported is respondent's share plus any company expense.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
TRANSMISSION LINES ADDED DURING YEAR
  1. Report below the information called for concerning Transmission lines added or altered during the year. It is not necessary to report minor revisions of lines.
  2. Provide separate subheadings for overhead and under- ground construction and show each transmission line separately. If actual costs of competed construction are not readily available for reporting columns (l) to (o), it is permissible to report in these columns the costs. Designate, however, if estimated amounts are reported. Include costs of Clearing Land and Rights-of-Way, and Roads and Trails, in column (l) with appropriate footnote, and costs of Underground Conduit in column (m).
  3. If design voltage differs from operating voltage, indicate such fact by footnote; also where line is other than 60 cycle, 3 phase, indicate such other characteristic.
LINE DESIGNATION SUPPORTING STRUCTURE CIRCUITS PER STRUCTURE CONDUCTORS LINE COST
Line No.
TransmissionLineStartPoint
From
TransmissionLineEndPoint
To
LengthOfTransmissionLineAdded
Line Length in Miles
SupportingStructureOfTransmissionLineType
Type
AverageNumberOfSupportingStructuresOfTransmissionLinePerMiles
Average Number per Miles
NumberOfTransmissionCircuitsPerStructurePresent
Present
NumberOfTransmissionCircuitsPerStructureUltimate
Ultimate
ConductorSize
Size
ConductorSpecification
Specification
ConductorConfigurationAndSpacing
Configuration and Spacing
OperatingVoltageOfTransmissionLine
Voltage KV (Operating)
CostOfLandAndLandRightsTransmissionLinesAdded
Land and Land Rights
CostOfPolesTowersAndFixturesTransmissionLinesAdded
Poles, Towers and Fixtures
CostOfConductorsAndDevicesTransmissionLinesAdded
Conductors and Devices
Asset Retire. Costs
CostOfTransmissionLinesAdded
Total
SupportingStructureConstructionType
Construction
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
(k)
(l)
(m)
(n)
(o)
(p)
(q)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
TOTAL
0
0
0
0


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
SUBSTATIONS
  1. Report below the information called for concerning substations of the respondent as of the end of the year.
  2. Substations which serve only one industrial or street railway customer should not be listed below.
  3. Substations with capacities of Less than 10 MVA except those serving customers with energy for resale, may be grouped according to functional character, but the number of such substations must be shown.
  4. Indicate in column (b) the functional character of each substation, designating whether transmission or distribution and whether attended or unattended. At the end of the page, summarize according to function the capacities reported for the individual stations in column (f).
  5. Show in columns (I), (j), and (k) special equipment such as rotary converters, rectifiers, condensers, etc. and auxiliary equipment for increasing capacity.
  6. Designate substations or major items of equipment leased from others, jointly owned with others, or operated otherwise than by reason of sole ownership by the respondent. For any substation or equipment operated under lease, give name of lessor, date and period of lease, and annual rent. For any substation or equipment operated other than by reason of sole ownership or lease, give name of co-owner or other party, explain basis of sharing expenses or other accounting between the parties, and state amounts and accounts affected in respondent's books of account. Specify in each case whether lessor, co-owner, or other party is an associated company.
Character of Substation VOLTAGE (In MVa) Conversion Apparatus and Special Equipment
Line No.
SubstationNameAndLocation
Name and Location of Substation
(a)
SubstationCharacterDescription
Transmission or Distribution
(b)
SubstationCharacterAttendedOrUnattended
Attended or Unattended
(b-1)
PrimaryVoltageLevel
Primary Voltage (In MVa)
(c)
SecondaryVoltageLevel
Secondary Voltage (In MVa)
(d)
TertiaryVoltageLevel
Tertiary Voltage (In MVa)
(e)
SubstationInServiceCapacity
Capacity of Substation (In Service) (In MVa)
(f)
NumberOfTransformersInService
Number of Transformers In Service
(g)
Number of Spare Transformers
(h)
ConversionApparatusAndSpecialEquipmentType
Type of Equipment
(i)
NumberOfConversionApparatusAndSpecialEquipmentUnits
Number of Units
(j)
CapacityOfConversionApparatusAndSpecialEquipment
Total Capacity (In MVa)
(k)
1
Groton Basin Operated (SD)
Transmission
Unattended
345.00
115.00
195
1
2
Webster NW (SD)
Transmission
Unattended
69.00
4.16
5
1
3
Clark Jct. (SD)
Transmission
Unattended
69.00
4.16
7
1
Fans
5
4
WMU West Sub (SD)
Transmission
Unattended
115.00
69.00
25
1
Fans
13
5
Yankton East Plant A (SD)
Transmission
Unattended
34.40
12.50
7
1
6
Yankton East Plant B (SD)
Transmission
Unattended
34.40
12.50
20
1
Fans
8
7
Chamberlin (SD)
Transmission
Unattended
69.00
12.50
12
1
Fans
3
8
WAPA Mt. Vernon (SD)
Transmission
Unattended
115.00
69.00
13.80
40
1
Fans
16
9
Stickney Jct. (SD)
Transmission
Unattended
69.00
34.50
25
1
Fans
10
10
Aberdeen Industrial Park (SD)
Transmission
Unattended
115.00
34.40
60
1
Fans
36
11
Redfield A (SD)
Transmission
Unattended
115.00
34.40
42
1
Fans
17
12
Redfield B (SD)
Transmission
Unattended
34.40
4.16
1
3
13
Redfield C (SD)
Transmission
Unattended
67.00
34.40
20
1
Fans, Pumps
8
14
Redfield D (SD)
Transmission
Unattended
34.40
12.50
4
1
Fans
1
15
WAPA Broadland (SD)
Transmission
Unattended
230.00
115.00
100
3
16
Aberdeen Siebrecht A (SD)
Transmission
Unattended
115.00
34.40
60
1
Fans
24
17
Aberdeen Siebrecht B (SD)
Transmission
Unattended
34.50
13.20
28
1
Fans
13
18
Aberdeen Siebrecht C (SD)
Transmission
Unattended
34.50
12.47
14
1
Fans
2
19
Aberdeen Siebrecht D (SD)
Transmission
Unattended
115.00
13.80
84
1
Fans
34
20
Huron West Park A (SD)
Transmission
Unattended
67.00
34.40
20
1
Fans
8
21
Huron West Park B (SD)
Transmission
Unattended
110.00
69.00
60
1
Fans
24
22
Huron West Park C (SD)
Transmission
Unattended
110.00
69.00
60
1
Fans
24
23
Dakota Access A (SD)
Transmission
Unattended
115.00
4.16
20
1
Fans
6
24
Dakota Access B (SD)
Transmission
Unattended
115.00
4.16
20
1
Fans
6
25
Mitchell A (SD)
Transmission
Unattended
115.00
34.40
40
1
Fans
16
26
Mitchell B (SD)
Transmission
Unattended
115.00
34.40
40
1
Fans
16
27
Mitchell NW (SD)
Transmission
Unattended
115.00
34.40
42
1
Fans
17
28
Huron Gas Turbine Plant A (SD)
Transmission
Unattended
69.00
12.00
20
1
Fans
8
29
Huron Gas Turbnie Plant B (SD)
Transmission
Unattended
69.00
24.90
14
1
Fans
3
30
Huron Gas Turbine Plant C (SD)
Transmission
Unattended
69.00
13.80
75
1
Fans
45
31
Highmore Plant A (SD)
Transmission
Unattended
67.00
34.40
11
1
Fans
3
32
Highmore Plant B (SD)
Transmission
Unattended
34.50
4.16
6
1
Fans
1
33
Highmore ER Interconnect (SD)
Transmission
Unattended
69.00
69.00
20
8
34
Aberdeen A (SD)
Transmission
Unattended
115.00
12.47
25
1
Fans
10
35
Aberdeen B (SD)
Transmission
Unattended
115.00
34.40
60
1
Fans
24
36
Tripp Jct. (SD)
Transmission
Unattended
115.00
34.40
40
1
Fans
16
37
Yankton Jct. A (SD)
Transmission
Unattended
115.00
34.40
42
1
Fans
17
38
Yankton Jct. B (SD)
Transmission
Unattended
115.00
34.40
42
1
Fans
17
39
Menno Jct. (SD)
Transmission
Unattended
115.00
34.40
20
1
Fans
8
40
Yankton East A (SD)
Transmission
Unattended
115.00
34.50
60
1
Fans
41
Yankton East B (SD)
Transmission
Unattended
34.40
12.50
25
1
Fans
25
42
Schroeder (Beethoven Wind) (SD)
Transmission
Unattended
115.00
34.50
83
1
Fans
33
43
Big Stone Plant A (SD)
Transmission
Unattended
230.00
115.00
13.80
54
1
1
44
Big Stone Plant B (SD)
Transmission
Unattended
22.90
230.00
123
1
45
Neal #4, Iowa (SD)
Transmission
Unattended
24.00
345.00
61
1
1
46
Coyote, North Dakota (SD)
Transmission
Unattended
22.90
345.00
48
1
1
47
Redfield City (SD)
Transmission
Unattended
34.40
4.16
15
1
Fans
2
48
Yankton Hilltop (SD)
Transmission
Unattended
34.40
12.50
24
1
Fans
13
49
12 others under 10,000 MVA (SD)
Transmission
Unattended
47
11
50
Platte A (SD)
Distribution
Unattended
34.40
4.16
5
1
Fans
1
51
Platte B (SD)
Distribution
Unattended
67.00
34.50
14
1
Fans
4
52
Wagner (SD)
Distribution
Unattended
34.40
12.50
10
1
Fans
4
53
SW Wagner (SD)
Distribution
Unattended
34.40
12.50
10
1
Fans
4
54
SW Freeman (SD)
Distribution
Unattended
34.40
25.00
12.47
12
1
Fans
4
55
Cham. Missouri View (SD)
Distribution
Unattended
67.00
12.50
10
1
Fans
4
56
Aberdeen 4th Street (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
57
Aberdeen 8th Avenue (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
58
Aberdeen Cemetary (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
59
Aberdeen Fairgrounds (SD)
Distribution
Unattended
34.50
12.50
14
4
60
Aberdeen Country Club (SD)
Distribution
Unattended
34.40
12.47
14
1
Fans
4
61
Aberdeen (NW CC) (SD)
Distribution
Unattended
34.40
12.50
10
1
62
Aberdeen Industrial Park (SD)
Distribution
Unattended
34.40
12.50
24
1
Fans
13
63
Aberdeen SE A (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
64
Aberdeen SE B (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
65
Aberdeen NE Gas Plant A (SD)
Distribution
Unattended
34.40
12.50
10
1
66
Aberdeen NE Gas Plant B (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
67
Aberdeen Ethanol (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
68
Henry (SD)
Distribution
Unattended
69.00
24.90
14
1
Fans
3
69
Huron SW (SD)
Distribution
Unattended
67.00
12.50
10
1
70
Huron Frank Avenue (SD)
Distribution
Unattended
67.00
12.50
12
1
71
Huron City A (SD)
Distribution
Unattended
69.00
12.50
20
1
Fans
8
72
Huron City B (SD)
Distribution
Unattended
69.00
12.50
20
1
Fans
8
73
Mitchell Lake Mitchell (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
74
Mitchell Bridle Acres (SD)
Distribution
Unattended
34.40
12.50
20
1
Fans
8
75
Mitchell Jr. High A (SD)
Distribution
Unattended
34.40
12.50
6
1
Fans
1
76
Mitchell Jr. High B (SD)
Distribution
Unattended
34.40
12.50
5
1
Fans
5
77
Mitchell Park A (SD)
Distribution
Unattended
34.40
12.50
25
1
Fans
15
78
Mitchell Park B (SD)
Distribution
Unattended
34.40
12.50
25
1
Fans
15
79
Ohlman Substation (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
80
Mitchell S. Edgerton (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
81
Mitchell S. Kimball (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
82
Yankton NW (SD)
Distribution
Unattended
34.40
12.50
20
1
Fans
8
83
Yankton Warehouse (SD)
Distribution
Unattended
34.40
12.50
10
1
Fans
84
Yankton Sacred Heart (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
85
Yankton SE (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
86
Yankton City (SD)
Distribution
Unattended
34.40
12.50
14
1
Fans
4
87
50 Others Under 10,000 KVA (SD)
138
95
88
Alkali Creek (BILLINGS)
Transmission
Unattended
230.00
161.00
13.80
400
2
FOA
89
Baseline (BILLINGS)
Transmission
Unattended
230.00
100.00
13.80
200
1
FOA
90
Bellrock (BILLINGS)
Distribution
Unattended
100.00
12.50
83
2
FFA
91
Billings Eighth Street (BILLINGS)
Distribution
Unattended
100.00
12.50
126
3
FFA
92
Billings Eighth Street (BILLINGS)
Transmission
Unattended
100.00
50.00
2.40
30
3
1
FA
93
Billings City (BILLINGS)
Distribution
Unattended
100.00
12.50
83
2
FFA
94
Billings Conoco (BILLINGS)
Distribution
Unattended
100.00
12.50
120
2
FOA
95
Billings Eastside (BILLINGS)
Distribution
Unattended
100.00
12.50
60
3
FOA
96
Billings Shiloh Road (BILLINGS)
Distribution
Unattended
100.00
12.50
83
2
FFA
97
Billings Steam Plant Switchyard A (BILLINGS)
Distribution
Unattended
100.00
12.50
40
2
FFA
98
Billings Steam Plant Switchyard B (BILLINGS)
Transmission
Unattended
230.00
100.00
13.80
400
2
FOA
99
Billings Steam Plant Switchyard C (BILLINGS)
Transmission
Unattended
100.00
50.00
75
3
1
FA
100
Bridger Auto (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
51
2
FA & FOA
101
Bridger City (BILLINGS)
Distribution
Unattended
50.00
12.50
7
1
OA/FA
102
Broadview Switchyard A (BILLINGS)
Transmission
Unattended
230.00
100.00
200
2
FOA
103
Broadview Switchyard B (BILLINGS)
Transmission
Unattended
500.00
230.00
34.50
1200
2
FOA
104
Chrome Junction (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
25
1
FA
105
CHS (BILLINGS)
Distribution
Unattended
100.00
125.00
168
4
OA/FA/FA
106
Colstrip City (BILLINGS)
Distribution
Unattended
115.00
12.50
40
2
FOA
107
Colstrip 500 (BILLINGS)
Transmission
Unattended
500.00
230.00
34.50
1000
2
1
FOA
108
Colstrip 230 (BILLINGS)
Transmission
Unattended
230.00
115.00
13.80
200
2
FA & FOA
109
Colstrip City (BILLINGS)
Transmission
Unattended
115.00
69.00
13.80
24
3
1
OA
110
Columbus Auto (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
25
1
FA
111
Columbus East (BILLINGS)
Distribution
Unattended
50.00
12.40
8
3
FOA
112
Columbus-Rajelje Auto (BILLINGS)
Transmission
Unattended
230.00
100.00
13.80
200
2
OA/FA/FA
113
Billings Exxon (BILLINGS)
Distribution
Unattended
50.00
12.50
90
3
FA & FOA
114
Garnell Pipeline (BILLINGS)
Distribution
Unattended
100.00
4.16
20
1
OA/FA
115
Glengarry (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
75
2
FOA
116
Gordon Butte (BILLINGS)
Transmission
Unattended
100.00
100.00
117
Hardin Auto A (BILLINGS)
Transmission
Unattended
230.00
100.00
13.80
200
1
FOA
118
Hardin Auto B (BILLINGS)
Transmission
Unattended
115.00
50.00
2.50
18
1
FA
119
Hardin City (BILLINGS)
Distribution
Unattended
69.00
12.50
20
1
120
Harlowtown A (BILLINGS)
Transmission
Unattended
50.00
4.16
3
1
FA
121
Harlowtown B (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
20
1
OA/FA/FA
122
Judith Gap Auto (BILLINGS)
Transmission
Unattended
230.00
100.00
13.80
100
1
FOA
123
Judith Gap South (BILLINGS)
Transmission
Unattended
230.00
230.00
1
FOA
124
Billings King Avenue (BILLINGS)
Distribution
Unattended
100.00
12.50
40
2
FFA
125
Laurel Auto (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
30
3
1
FA
126
Laurel City (BILLINGS)
Distribution
Unattended
100.00
12.50
40
2
FOA
127
Meridian (BILLINGS)
Distribution
Unattended
100.00
12.50
40
2
FOA
128
Montana One (BILLINGS)
Transmission
Unattended
115.00
115.00
129
Musselshell Wind (BILLINGS)
Transmission
Unattended
100.00
130
Nye (BILLINGS)
Transmission
Unattended
100.00
131
Painted Robe (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
25
1
FA
132
Red Lodge Northside (BILLINGS)
Distribution
Unattended
50.00
12.50
12
1
FA
133
Billings Rimrock A (BILLINGS)
Transmission
Unattended
100.00
50.00
60
1
FA
134
Billings Rimrock B (BILLINGS)
Distribution
Unattended
100.00
12.50
20
3
1
OA
135
Billings Rimrock C (BILLINGS)
Transmission
Unattended
161.00
100.00
6.90
75
2
FA
136
Billings Rimrock D (BILLINGS)
Transmission
Unattended
100.00
69.00
13.80
50
6
FA
137
Roundup Auto (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
25
1
FA
138
Sarpy Creek Auto (BILLINGS)
Distribution
Unattended
115.00
69.00
13.80
24
3
1
OA
139
Shorey Road Switchyard (BILLINGS)
Transmission
Unattended
230.00
140
South Huntley (BILLINGS)
Transmission
Unattended
230.00
69.00
13.80
83
1
FFA
141
Stanford Auto A (BILLINGS)
Transmission
Unattended
100.00
69.00
13.80
26
1
FA
142
Stanford Auto B (BILLINGS)
Transmission
Unattended
100.00
50.00
13.80
20
1
FA
143
Billings Central (BILLINGS)
Transmission
Unattended
100.00
144
Stillwater Wind (BILLINGS)
Transmission
Unattended
230.00
145
Two Dot Wind Swyd (BILLINGS)
Transmission
Unattended
100.00
146
Western Energy Armells Creek (BILLINGS)
Distribution
Unattended
115.00
12.50
40
2
FOA
147
Billings Wicks Lane (BILLINGS)
Distribution
Unattended
230.00
12.50
50
2
FFA
148
Belgrade (BOZEMAN)
Distribution
Unattended
50.00
12.50
40
2
FFA
149
Belgrade West (BOZEMAN)
Distribution
Unattended
161.00
12.50
25
1
OA/FA/FA
150
Belgrade West (BOZEMAN)
Transmission
Unattended
161.00
50.00
14.40
50
1
OA/FA/FA
151
Big Sky Meadow Village (BOZEMAN)
Distribution
Unattended
161.00
12.50
25
1
OA/FA/FA
152
Big Sky Meadow Village (BOZEMAN)
Transmission
Unattended
161.00
69.00
14.40
50
1
OA/FA/FA
153
Big Sky Midway A (BOZEMAN)
Distribution
Unattended
69.00
12.50
25
1
OA/FA/FA
154
Big Sky Midway B (BOZEMAN)
Distribution
Unattended
69.00
25.00
25
1
OA/FA/FA
155
Big Timber Auto (BOZEMAN)
Transmission
Unattended
161.00
50.00
14.40
50
1
OA/FA/FA
156
Big Timber Wind (BOZEMAN)
Transmission
Unattended
161.00
157
Bozeman East Gallatin Auto (BOZEMAN)
Distribution
Unattended
50.00
12.50
30
4
1
FA & CAP
1
20
158
Bozeman East Gallatin Auto (BOZEMAN)
Transmission
Unattended
161.00
50.00
13.80
100
2
FOA
159
Bozeman Sourdough (BOZEMAN)
Distribution
Unattended
50.00
12.47
20
1
160
Bozeman Southside (BOZEMAN)
Distribution
Unattended
50.00
12.50
40
2
FA & FOA
161
Bozeman Westside (BOZEMAN)
Distribution
Unattended
161.00
12.50
62
2
FOA
162
Bradley Creek (BOZEMAN)
Transmission
Unattended
161.00
100.00
13.80
50
1
FOA
163
Clyde Park (BOZEMAN)
Transmission
Unattended
161.00
50.00
13.80
66
3
1
FA
164
Emigrant (BOZEMAN)
Transmission
Unattended
161.00
69.00
13.80
50
1
FOA
165
Ennis Auto (BOZEMAN)
Transmission
Unattended
161.00
69.00
13.80
50
2
FA
166
Ennis City (BOZEMAN)
Distribution
Unattended
69.00
12.50
10
1
167
Bozeman Jackrabbit Auto (BOZEMAN)
Distribution
Unattended
161.00
12.50
50
2
OA/FA/FA
168
Bozeman Jackrabbit Auto (BOZEMAN)
Transmission
Unattended
161.00
50.00
13.80
100
1
FOA
169
Livingston Westside A (BOZEMAN)
Transmission
Unattended
69.00
50.00
4.16
22
3
1
FA
170
Livingston Westside B (BOZEMAN)
Distribution
Unattended
50.00
12.50
12
1
OA/FA
171
Livingston Westside C (BOZEMAN)
Distribution
Unattended
50.00
4.16
20
1
OA/FA/FA
172
Livingston Northside (BOZEMAN)
Distribution
Unattended
50.00
4.16
14
OA/FA
173
Lone Mountain Big Sky A (BOZEMAN)
Distribution
Unattended
161.00
69.00
14.40
50
1
OA/FA/FA
174
Lone Mountain Big Sky B (BOZEMAN)
Distribution
Unattended
161.00
25.00
84
2
OA/FA/FA
175
Manhattan (BOZEMAN)
Distribution
Unattended
50.00
12.50
12
1
FA
176
Bozeman Patterson (BOZEMAN)
Distribution
Unattended
50.00
12.50
12
1
FA
177
Bozeman Riverside (BOZEMAN)
Distribution
Unattended
50.00
12.50
12
1
178
Three Forks South (BOZEMAN)
Distribution
Unattended
100.00
12.50
20
1
FA
179
Three Rivers A (BOZEMAN)
Transmission
Unattended
161.00
100.00
13.80
50
1
1
FA
180
Three Rivers B (BOZEMAN)
Transmission
Unattended
230.00
161.00
13.80
200
1
FOA
181
Trident Auto (BOZEMAN)
Transmission
Unattended
100.00
50.00
13.80
50
1
OA/FA/FA
182
Wilsall (BOZEMAN)
Transmission
Unattended
230.00
161.00
13.80
300
2
FOA & CAP
2
44
183
Willow Creek (BOZEMAN)
Distribution
Unattended
100.00
12.50
12
1
OA/FA
184
Anaconda City (BUTTE)
Distribution
Unattended
100.00
25.00
20
2
185
Mill Creek A (BUTTE)
Transmission
Unattended
230.00
161.00
13.80
600
2
OA/FA/FA
186
Mill Creek Generating (BUTTE)
Transmission
Unattended
230.00
13.80
240
4
FOA
187
Barrett's Minerals (BUTTE)
Distribution
Unattended
69.00
25.00
12
1
FA
188
(a)
ASIMI (BUTTE)
Transmission
Unattended
161.00
12.47
200
4
189
Butte Concentrator (BUTTE)
Distribution
Unattended
100.00
4.16
78
22
190
Butte Continental Drive (BUTTE)
Distribution
Unattended
100.00
12.50
20
1
FOA
191
Butte Industrial Park (BUTTE)
Distribution
Unattended
100.00
12.50
13
3
1
FA
192
Butte Montana St A (BUTTE)
Distribution
Unattended
100.00
69.00
6.90
30
3
FA
193
Butte Montana St B (BUTTE)
Distribution
Unattended
100.00
12.47
50
2
OA/FA/FA
194
Mill Creek B (BUTTE)
Transmission
Unattended
161.00
100.00
14.00
250
2
OA/FA/FA
195
Sheridan City (BUTTE)
Transmission
Unattended
69.00
50.00
14.00
15
1
196
Butte Cora (BUTTE)
Distribution
Unattended
100.00
12.50
22
1
FOA
197
Deer Lodge City (BUTTE)
Distribution
Unattended
100.00
25.00
16
1
FOA
198
Dillon City (BUTTE)
Distribution
Unattended
69.00
25.00
14
1
FA
199
Dillon-Salmon (BUTTE)
Transmission
Unattended
161.00
69.00
14.40
100
2
1
FA
200
Drummond City (BUTTE)
Transmission
Unattended
100.00
24.94
6
3
FA
201
Golden Sunlight (BUTTE)
Distribution
Unattended
230.00
24.94
90
2
202
MHD (BUTTE)
Distribution
Unattended
161.00
203
Peterson Flats (BUTTE)
Transmission
Unattended
230.00
230.00
204
Philipsburg South (BUTTE)
Distribution
Unattended
100.00
25.00
14
1
OA/FA
205
Precipitator (BUTTE)
Distribution
Unattended
100.00
2.40
14
1
206
Ramsay Pump (BUTTE)
Distribution
Unattended
100.00
12.47
12
1
FA
207
Renova Auto (BUTTE)
Transmission
Unattended
100.00
50.00
13.80
27
1
FOA
208
Sheridan Auto (BUTTE)
Transmission
Unattended
161.00
69.00
13.80
25
1
FA
209
South Butte A (BUTTE)
Transmission
Unattended
230.00
161.00
14.40
200
1
OA/FA/FA
210
South Butte B (BUTTE)
Transmission
Unattended
161.00
100.00
2.40
125
2
FOA
211
Conrad Auto (GREAT FALLS)
Transmission
Unattended
115.00
69.00
13.80
17
3
1
FA
212
Crooked Falls A (GREAT FALLS)
Transmission
Unattended
100.00
69.00
100
2
FOA
213
Crooked Falls B (GREAT FALLS)
Transmission
Unattended
161.00
100.00
14.40
75
1
214
Fairfield Wind (GREAT FALLS)
Transmission
Unattended
69.00
215
Glacier Wind Switchyard (GREAT FALLS)
Transmission
Unattended
115.00
216
Great Falls 230 Switchyard A (GREAT FALLS)
Transmission
Unattended
230.00
100.00
400
3
FOA
217
Great Falls 230 Switchyard B (GREAT FALLS)
Transmission
Unattended
115.00
100.00
13.80
150
1
FOA
218
Great Falls City (GREAT FALLS)
Distribution
Unattended
100.00
12.50
40
2
FOA
219
Great Falls Eastside (GREAT FALLS)
Distribution
Unattended
100.00
12.50
50
2
FA
220
Great Falls Northeast (GREAT FALLS)
Distribution
Unattended
100.00
12.50
20
1
FOA
221
Great Falls Northwest (GREAT FALLS)
Distribution
Unattended
100.00
12.50
40
2
FOA
222
Great Falls Riverview (GREAT FALLS)
Distribution
Unattended
100.00
12.50
45
2
FOA
223
Great Falls Southeast (GREAT FALLS)
Distribution
Unattended
100.00
12.50
42
1
FOA
224
Great Falls Southside (GREAT FALLS)
Distribution
Unattended
100.00
12.50
40
2
FOA
225
Great Falls Southwest (GREAT FALLS)
Distribution
Unattended
100.00
12.50
20
1
FOA
226
Highwood Switchyard (GREAT FALLS)
Transmission
Unattended
230.00
227
Kershaw Switchyard (GREAT FALLS)
Transmission
Unattended
69.00
228
Montana Refinery (GREAT FALLS)
Transmission
Unattended
100.00
229
South Cut Bank (GREAT FALLS)
Transmission
Unattended
115.00
230
Spion Kop Collector (GREAT FALLS)
Transmission
Unattended
100.00
34.50
42
1
231
Spion Kop Switchyard (GREAT FALLS)
Transmission
Unattended
100.00
232
Spion Kop 230kV Switchyard (GREAT FALLS)
Transmission
Unattended
230.00
233
Turnbull (GREAT FALLS)
Distribution
Unattended
69.00
234
Ulm (GREAT FALLS)
Distribution
Unattended
100.00
25.00
12
1
235
Valier-Williams (GREAT FALLS)
Distribution
Unattended
115.00
25.00
14
1
FA
236
Holter (HELENA)
Transmission
Unattended
100.00
237
Ash Grove (HELENA)
Distribution
Unattended
69.00
4.16
10
2
OA
238
Boulder Auto (HELENA)
Transmission
Unattended
100.00
69.00
2.40
56
3
1
OA/FA
239
Broadwater (HELENA)
Transmission
Unattended
100.00
240
Canyon Creek (HELENA)
Distribution
Unattended
100.00
25.00
10
1
241
Custer Auto (HELENA)
Transmission
Unattended
100.00
69.00
14.40
100
1
OA/FA/FA
242
East Helena Switchyard A (HELENA)
Distribution
Unattended
100.00
12.50
25
1
OA/FA/FA
243
East Helena Switchyard B (HELENA)
Transmission
Unattended
100.00
69.00
13.80
150
1
1
OA/FA/FA
244
East Helena Switchyard C (HELENA)
Transmission
Unattended
100.00
12.47
20
1
245
Helena Eastside (HELENA)
Distribution
Unattended
69.00
12.50
5
4
1
OA/FA
246
Helena Golf Course Bank #1 (HELENA)
Distribution
Unattended
69.00
12.50
20
1
OA/FA/FA
247
Helena Golf Course Bank #2 (HELENA)
Distribution
Unattended
69.00
12.50
20
1
OA/FA/FA
248
Helena Southside (HELENA)
Distribution
Unattended
100.00
12.50
40
2
OA/FA/FA
249
Helena Valley (HELENA)
Distribution
Unattended
100.00
12.50
32
2
OA/FA/FA
250
Helena Westside A (HELENA)
Distribution
Unattended
69.00
12.50
25
1
OA/FA
251
Helena Westside B (HELENA)
Distribution
Unattended
69.00
12.50
12
1
252
Holter Wolf Creek (HELENA)
Transmission
Unattended
100.00
13.00
3
1
253
Landers Fork (HELENA)
Distribution
Unattended
230.00
25.00
12
1
OA/FA
254
Lake Helena (HELENA)
Transmission
Unattended
100.00
255
Loweth Auto (HELENA)
Transmission
Unattended
100.00
69.00
14.00
15
1
OA/FA
256
Montana Tunnels (HELENA)
Distribution
Unattended
100.00
4.16
22
6
257
Townsend (HELENA)
Distribution
Unattended
100.00
12.50
20
1
OA/FA/FA
258
Bonner (MISSOULA)
Distribution
Unattended
161.00
12.50
40
3
1
FOA
259
Crow Creek Junction (MISSOULA)
Transmission
Unattended
115.00
260
Darby (MISSOULA)
Distribution
Unattended
69.00
12.50
12
4
FA
261
Hamilton Heights (MISSOULA)
Transmission
Unattended
161.00
69.00
13.80
100
2
FOA
262
Hamilton South Side (MISSOULA)
Distribution
Unattended
69.00
12.50
40
2
FOA
263
Kerr Switchyard (MISSOULA)
Transmission
Unattended
161.00
115.00
14.40
400
2
OA/FA/FA
264
Lolo (MISSOULA)
Distribution
Unattended
69.00
12.50
12
1
FA
265
Missoula Butler Creek (MISSOULA)
Distribution
Unattended
100.00
12.50
20
1
266
Missoula City Sub #1 (MISSOULA)
Distribution
Unattended
100.00
12.50
40
2
FOA
267
Missoula Hillview Heights (MISSOULA)
Distribution
Unattended
100.00
25.00
40
2
FOA
268
Missoula Industrial Sub (MISSOULA)
Distribution
Unattended
100.00
12.50
60
3
FOA
269
Missoula Miller Creek A (MISSOULA)
Transmission
Unattended
161.00
100.00
6.90
75
3
FOA
270
Missoula Miller Creek B (MISSOULA)
Transmission
Unattended
100.00
69.00
100
2
FOA
271
Missoula Reserve Street (MISSOULA)
Distribution
Unattended
100.00
12.50
25
1
OA/FA/FA
272
Missoula Reserve Street (MISSOULA)
Transmission
Unattended
161.00
100.00
75
3
1
FOA & CAP
4
38
273
Missoula Russell Street (MISSOULA)
Distribution
Unattended
100.00
12.50
60
3
FOA
274
Missoula Target Range (MISSOULA)
Distribution
Unattended
161.00
12.50
40
2
FOA
275
Ovando Switchyard (MISSOULA)
Transmission
Unattended
230.00
276
Placid Lake Switchyard (MISSOULA)
Transmission
Unattended
230.00
277
Plains (MISSOULA)
Distribution
Unattended
115.00
12.50
17
1
OA
278
Rattlesnake Switchyard A (MISSOULA)
Transmission
Unattended
161.00
100.00
13.80
300
6
FOA & CAP
2
23
279
Rattlesnake Switchyard B (MISSOULA)
Transmission
Unattended
230.00
161.00
13.80
391
1
FOA
280
Stevensville Sub (MISSOULA)
Distribution
Unattended
69.00
12.50
25
OA/FA/FA
281
Taft Auto (MISSOULA)
Transmission
Unattended
115.00
100.00
13.10
50
1
FOA
282
Thompson Falls City (MISSOULA)
Distribution
Unattended
100.00
12.50
12
3
1
FOA
283
Thompson Falls Generation (MISSOULA)
Transmission
Unattended
115.00
284
Waldorf (MISSOULA)
Distribution
Unattended
100.00
12.47
112
8
285
Assiniboine-Havre (HAVRE)
Transmission
Unattended
161.00
69.00
53
6
1
FA
286
Glasgow Westside (HAVRE)
Distribution
Unattended
69.00
12.50
12
2
FA
287
Harlem (HAVRE)
Transmission
Unattended
161.00
69.00
25
3
FA
288
Havre City (HAVRE)
Distribution
Unattended
69.00
12.40
27
2
FA
289
Havre Eastside (HAVRE)
Distribution
Unattended
69.00
12.50
10
1
FA
290
Malta Auto (HAVRE)
Transmission
Unattended
161.00
69.00
7.20
25
3
1
FA
291
Richardson Coulee (HAVRE)
Transmission
Unattended
161.00
69.00
20
3
292
Whatley (HAVRE)
Transmission
Unattended
69.00
293
207 Others Under 10,000 KVA (MT)
Distribution
Unattended
693
387
9
294
Others Under 10,000 KVA (MT)
Transmission
Unattended
41
16
2
295
TotalDistributionSubstationMember
11,201.10
2,110.01
47.57
4,746
716
16
1
189
296
TotalTransmissionSubstationMember
20,389.10
9,197.20
839.96
12,564
229
20
8
645
297
Total
31,590.20
11,307.21
887.53
17,310
945
36
9
834


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
FOOTNOTE DATA

(a) Concept: SubstationNameAndLocation
This substation is owned by Butte Silver Bow County and currently provides service only to REC Silicon. Northwestern, through an agreement with REC, operates and maintains this substation.

Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

12/31/2021
Year/Period of Report

End of:
2021
/
Q4
TRANSACTIONS WITH ASSOCIATED (AFFILIATED) COMPANIES
  1. Report below the information called for concerning all non-power goods or services received from or provided to associated (affiliated) companies.
  2. The reporting threshold for reporting purposes is $250,000. The threshold applies to the annual amount billed to the respondent or billed to an associated/affiliated company for non-power goods and services. The good or service must be specific in nature. Respondents should not attempt to include or aggregate amounts in a nonspecific category such as "general".
  3. Where amounts billed to or received from the associated (affiliated) company are based on an allocation process, explain in a footnote.
Line No.
Description of the Good or Service
(a)
Name of Associated/Affiliated Company
(b)
Account(s) Charged or Credited
(c)
Amount Charged or Credited
(d)
1
Non-power Goods or Services Provided by Affiliated
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Non-power Goods or Services Provided for Affiliated
21
Administration Fee
Havre Pipeline Company, LLC
500,400
42