34.00834.15734.08334.18434.00934.158434.08434.185334.010Montana Operations34.15934.085234.186134.01134.160Q334.086534.18734.012C00178934.161NorthWestern Corporation634.087202134.18834.013734.16234.088834.18934.01434.163934.08934.190O34.25734.231Q334.03534.05621NorthWestern Corporation34.2582021-09-3034.23234.03620212234.057Q334.259NorthWestern Corporation34.2332021-09-3034.0372334.058202134.260Q334.23424NorthWestern Corporation34.03834.0592021-09-3034.261202134.235Q334.03934.060NorthWestern Corporation34.262South Dakota Operations2021-09-3034.236202134.04034.061Q313550403434.263NorthWestern Corporation34.2372021-09-3034.04134.0622021Q334.21034.02234.239NorthWestern Corporation34.09734.10934.123734.19834.0492021-09-3034.023202134.11034.124834.211Q334.09834.19934.050NorthWestern Corporation34.0242021-09-3034.11134.125934.212202134.09934.20034.051Q334.02534.11234.1261034.21334.10034.20134.05234.24072133795234.02670753215534.11334.1271134.21434.10134.20234.05371736007034.02734.24134.11434.1281234.21534.10272133795234.20334.05434.02834.24234.1151355040341141834834.1291334.216332964376744046610166442734.20434.05510166442772704140582639723924202134.13734.1501234.076212021-09-3020212021-09-302021Q3NorthWestern Corporation13734.15122Q3NorthWestern CorporationQ34NorthWestern Corporation2021-09-3034.077NorthWestern Corporation2021-09-3020211434.13834.152232021-09-302021Q334.07820213Q3NorthWestern Corporation15Q32NorthWestern Corporation2021-09-3034.13934.15324NorthWestern Corporation2021-09-3020211634.0792021-09-302021Q382021Q3NorthWestern Corporation34.14034.15425Q3NorthWestern Corporation2021-09-3017NorthWestern Corporation2021-09-30202134.0802021-09-302021Q334.14134.155262021Q3NorthWestern Corporation18Q3NorthWestern Corporation2021-09-3034.081NorthWestern Corporation2021-09-3020211934.14234.156272021-09-302021Q32021Q3NorthWestern Corporation34.082Q3NorthWestern Corporation2021-09-3020NorthWestern Corporation2021-09-30202134.015NorthWestern Corporation34.22434.164434.103Q334.01634.16534.0022021-09-3034.225534.001202134.00334.01734.10434.1666202134.22634.00434.018734.16734.10534.227834.00534.01934.16834.106NorthWestern Corporation34.22892021-09-3034.00634.02034.16934.107Q334.2291034.00734.021NorthWestern Corporation34.17034.10834.23011Q320212021-09-3034.25034.21734.23834.09034.11634.20534.04234.06334.17734.1913263972392434.25134.11734.21834.09134.04334.06434.17834.19234.25234.11834.21934.09234.04434.06534.17934.19334.25334.20634.119134.22034.09334.04534.066234.18034.19434.25434.120434.20734.22134.09434.04634.06734.18134.195103703834.25534.121534.20834.22234.09550393431634.04734.06834.18234.19634.25634.122634.20934.223202949111534.09634.04834.18334.197306597527460170334.06934.2641234.26534.0701334.26634.07134.26734.07234.07334.07418025748934.07534.02934.24334.1432834.13034.171147734.030334.24434.144792934.13115234.03134.24534.14530134.132164463069013434.172634.03234.24634.146325534.1331734.173634.03334.24734.1473334.13418734.17434.03434.248134.14834834.1351934.175934.24934.14934.1362010334.176211 C001789 Cycle Power Partners LLC NWMT Pacificorp NF Montana OATT HORSESHOE JEFF 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Colstrip Partners BPA SFP Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-09-30 C001789 EDF Trading North America, LLC BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind NWMT NF Montana OATT GLWND2 NWMT.SYSTEM 2021-01-012021-09-30 C001789 TransAlta Energy Marketing WAPA AVISTA NF Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-09-30 C001789 Seattle City Light NF 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-09-30 C001789 MAG Energy Solutions WAPA Pacificorp NF Montana OATT CROSSOVER JEFF 2021-01-012021-09-30 C001789 ferc:Quarter3Member Montana Operations 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind AVISTA SFP Montana OATT GLWND2 AVAT.NWMT 2021-01-012021-09-30 C001789 Energy Keepers, Inc BPA NWMT NF Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 PacifiCorp Colstrip Partners Pacificorp SFP Montana OATT COLSTRIP YTP 2021-01-012021-09-30 C001789 SIS Studies 2021-01-012021-09-30 C001789 Field Inventory (South Dakota) - Docket EL 14-106 2021-09-30 C001789 PacifiCorp BPA NWMT NF Montana OATT BPAT.NWMT COLSTRIP 2021-01-012021-09-30 C001789 Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization 2021-01-012021-09-30 C001789 Flow-through Income Taxes (Montana) 2021-07-012021-09-30 C001789 ferc:JanuaryMember Montana Operations 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Pacificorp MATL NF Montana OATT BRDY MATL.NWMT 2021-01-012021-09-30 C001789 Natural Gas Transmission Verification Program (Montana) - Docket D2016.11.88 2021-07-012021-09-30 C001789 ferc:CommonUtilityMember 2021-09-30 C001789 Optional Studiesferc:GenerationStudiesMember 2021-01-012021-09-30 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE98-001 2021-09-30 C001789 Bonneville Power Administration BPA WAPA NF Montana OATT BPAT.NWMT  GREATFALLS 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group MATL BPA SFP Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Optional Studies 2021-01-012021-09-30 C001789 Idaho Power Company NF 2021-01-012021-09-30 C001789 Avista Corporation NWMT BPA NF Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-09-30 C001789 ScheduleTransmissionOfElectricityByIsoOrRtoAbstract 2021-01-012021-09-30 C001789 (Less) (449.1) Provision for Rate Refunds 2021-01-012021-09-30 C001789 Common Stock Dividend 2020-01-012020-09-30 C001789 Brookfield Energy Marketing LP BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (South Dakota) 2021-09-30 C001789 Asset Retirement Obligation (South Dakota) 2021-01-012021-09-30 C001789 ferc:OtherUtilityMember 2021-01-012021-09-30 C001789 2021-09-30 C001789 Magris Talc USA, Inc. Energy Keepers Inc. Imerys Talc America, Inc. FNO Montana OATT Kerr Three Forks, MT 2021-01-012021-09-30 C001789 EDF Trading North America, LLC Pacificcorp NWMT NF Montana OATT BRDY COLSTRIP 2021-01-012021-09-30 C001789 Guzman Energy, LLC  Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind MATL NF Montana OATT GLWND2 MATL.NWMT 2021-01-012021-09-30 C001789 MAG Energy Solutions NWMT MATL NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Talen Energy Marketing, LLC NWMT  BPAT LFP Montana OATT GTFALLSNWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group WAPA AVISTA NF Montana OATT GREATFALLS AVAT.NWMT 2021-01-012021-09-30 C001789 PacifiCorp NWMT NWMT NF Montana OATT COLSTRIP NWMT.SYSTEM 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp Pacificorp BPA NF Montana OATT YTP BPAT 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 ferc:GasUtilityMember 2021-01-012021-09-30 C001789 Macquarie Energy LLC Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 Basin Electric Power Cooperative WAPA WAPA NF Montana OATT CROSSOVER GREATFALLS 2021-01-012021-09-30 C001789 Aberdeen Manufactured Gas Plant (South Dakota) - Docket NG 11-003 2021-07-012021-09-30 C001789 ferc:Quarter3Member 0 2021-01-012021-09-30 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE 98-001 2021-01-012021-09-30 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT JUDITHGAP JEFF 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 Basin Electric Power Cooperative Morgan Stanley, Talen & WAPA Basin Electric Power Cooperative FNO Montana OATT Various in Montana Various NWMT & WAUW 2021-01-012021-09-30 C001789 2020-12-31 C001789 Macquarie Energy LLC NWMT AVISTA NF Montana OATT MATL.NWMT AVAT.NWMT 2021-01-012021-09-30 C001789 Field Inventory (South Dakota) - Docket EL 14-106 2021-07-012021-09-30 C001789 Guzman Energy, LLC  Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC AVISTA Pacificorp NF Montana OATT AVAT.NWMT BRDY 2021-01-012021-09-30 C001789 Shell Energy North America WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization 2021-06-30 C001789 The Energy Authority Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-09-30 C001789 Dynasty Power Inc.  WAPA BPA SFP Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 Dynasty Power Inc.  Pacificorp BPA NF Montana OATT BRDY BPAT.NWMT 2021-01-012021-09-30 C001789 Brookfield Energy Marketing LP Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Colstrip Partners BPA NF Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-09-30 C001789 Basin Creek Capital Lease (Montana) 2021-09-30 C001789 Common Stock Dividend 2021-01-012021-09-30 C001789 City of Great Falls Energy Keepers Inc. City of Great Falls FNO Montana OATT Kerr Various in Montana 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group WAPA MATL NF Montana OATT CROSSOVER MATL.NWMT 2021-01-012021-09-30 C001789 Debt Financing Costs 2020-01-012020-09-30 C001789 ferc:TransmissionStudiesMember 2021-01-012021-09-30 C001789 Western Area Power Admin WAPA WAPA NF Montana OATT CANYONFERRY GREATFALLS 2021-01-012021-09-30 C001789 Investment in Equity Securities 2021-01-012021-09-30 C001789 Powerex  Corporation AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-09-30 C001789 Amortization of 2021-01-012021-09-30 C001789 South Dakota Operationsferc:MayMember 2021-01-012021-09-30 C001789 Pension Plan (South Dakota) 2021-01-012021-09-30 C001789 Dynasty Power Inc.  BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-09-30 C001789 Pension Plan (South Dakota) 2021-06-30 C001789 2021-01-012021-03-31 C001789 Avista Corporation AVISTA NWMT NF Montana OATT AVAT.NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization 2021-07-012021-09-30 C001789 Energy Keepers, Inc NWMT BPA OLF Montana OATT KERR BPAT.NWMT 2021-01-012021-09-30 C001789 Powerex  Corporation MATL BPA NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Powerex  Corporation BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 LANGFORD, CITY OF WAPA LANGFORD LFP VOL 2 HURON 115 KV BUS LANGFORD 12.5 KV 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group BPA NWMT NF Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 EDF Trading North America, LLC AVISTA NWMT NF Montana OATT AVAT,NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 Puget Sound Energy Marketing Colstrip Partners BPA SFP Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-09-30 C001789 Avista Corporation AVISTA NWMT NF Montana OATT AVAT.NWMT COLSTRIP 2021-01-012021-09-30 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE98-001 2021-07-012021-09-30 C001789 Shell Energy North America BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-09-30 C001789 Amortization of 2020-01-012020-09-30 C001789 Dynasty Power Inc.  WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-09-30 C001789 Other 2021-01-012021-09-30 C001789 Unbilled Revenues (South Dakota) 2021-09-30 C001789 EDF Trading North America, LLC AVISTA NWMT NF Montana OATT AVAT,NWMT COLSTRIP 2021-01-012021-09-30 C001789 ferc:OtherUtilityMember 2020-01-012020-09-30 C001789 Macquarie Energy LLC AVISTA Pacificorp NF Montana OATT AVAT.NWMT JEFF 2021-01-012021-09-30 C001789 Montana Resources Talen Energy & Energy Keepers, Inc. Montana Resources FNO Montana OATT Colstrip & Kerr Butte, MT 2021-01-012021-09-30 C001789 Powerex  Corporation Pacificorp Pacificorp NF Montana OATT BRDY YTP 2021-01-012021-09-30 C001789 ferc:ElectricUtilityMember 2021-01-012021-09-30 C001789 ferc:Quarter2Member Montana Operations 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 Western Area Power Admin WAPA WAPA SFP Montana OATT CROSSOVER GREATFALLS 2021-01-012021-09-30 C001789 Field Inventory (South Dakota) - Docket EL 14-106 2021-06-30 C001789 ferc:Quarter4Member Montana Operations 2021-01-012021-09-30 C001789 ferc:GasUtilityMember 2021-09-30 C001789 Tax Cut Jobs Act Deferral (South Dakota) - Docket NG-0095 and GE17-003 2021-06-30 C001789 Macquarie Energy LLC NWMT BPA SFP Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE98-001 2021-01-012021-09-30 C001789 ferc:CommonPlantElectricMemberferc:ElectricUtilityMember 2021-01-012021-09-30 C001789 Benefis Health Systems Energy Keepers inc. Benefis Health Systems FNO Montana OATT Kerr Various in Montana 2021-01-012021-09-30 C001789 EDF Trading North America, LLC NWMT Pacificorp SFP Montana OATT COLSTRIP YTP 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind Pacificorp NF Montana OATT GLWND1 JEFF 2021-01-012021-09-30 C001789 Flow-through Income Taxes (South 2021-09-30 C001789 ferc:OtherUtility2Member 2021-09-30 C001789 Avista Corporation AVISTA AVISTA SFP Montana OATT COLSTRIP AVAT.NMWT 2021-01-012021-09-30 C001789 Shell Energy North America Pacificorp AVISTA NF Montana OATT BRDY AVAT.NWMT 2021-01-012021-09-30 C001789 Macquarie Energy LLC WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-09-30 C001789 Dynasty Power Inc.  Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 Basin Creek Capital Lease (Montana) 2021-06-30 C001789 Manufactured Gas Plants (South Dakota) - Docket NG 11-003 2021-01-012021-09-30 C001789 Deferred Gas Storage Sales (Montana) - Docket D2001.1.1; Amortization 2001 - 2039 2021-06-30 C001789 Basin Creek Capital Lease (Montana) 2021-07-012021-09-30 C001789 ferc:TransmissionStudiesMember SIS Studies 2021-01-012021-09-30 C001789 EDF Trading North America, LLC NWMT  BPAT NF Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind Pacificorp NF Montana OATT GLWND2 JEFF 2021-01-012021-09-30 C001789 MONTANA POINT-TO-POINT      2021-01-012021-09-30 C001789 FEA Studies 2021-01-012021-09-30 C001789 Asset Retirement Obligation (Montana) 2021-07-012021-09-30 C001789 Shell Energy North America Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-09-30 C001789 Basin Electric Power Cooperative Basin Electric & WAPA Basin Electric Power Cooperative FNO Montana OATT Crossover  Various NWMT & WAUW 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (South Dakota) 2021-07-012021-09-30 C001789 Portland General Electric Company AVISTA NWMT NF Montana OATT AVAT.NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE 98-001 2021-07-012021-09-30 C001789 FAS 112 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-06-30 C001789 Morgan Stanley Capital  Group AVISTA Pacificorp NF Montana OATT AVAT.NWMT JEFF 2021-01-012021-09-30 C001789 Supply: 2021-01-012021-09-30 C001789 The Energy Authority BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-09-30 C001789 Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637 2021-06-30 C001789 Shell Energy North America BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (South Dakota) 2021-06-30 C001789 Flow-through Income Taxes (South 2021-06-30 C001789 Basin Electric Power Cooperative WAPA NWMT SFP Montana OATT CROSSOVER NWMT.SYSTEM 2021-01-012021-09-30 C001789 Uniper Global Commodities North America LLC Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 South Dakota Operations 2021-01-012021-09-30 C001789 Manufactured Gas Plants (South Dakota) - Docket NG 11-003 2021-07-012021-09-30 C001789 TransAlta Energy Marketing MATL BPA NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Western Area Power Administration WAPA Western Area Power Administration FNO Montana OATT Crossover Various NWMT & WAUW 2021-01-012021-09-30 C001789 Asset Retirement Obligation (Montana) 2021-09-30 C001789 Excess Deferred Income Taxes (South Dakota) 2021-01-012021-09-30 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT BGI JEFF 2021-01-012021-09-30 C001789 Study of the Costs & Benefits of Customer Generators (Montana) 2021-06-30 C001789 Morgan Stanley Capital  Group NWMT BPA NF Montana OATT KERR BPAT.NWMT 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC Pacificorp AVISTA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 Other Noncash Charges to Income, Net 2021-01-012021-09-30 C001789 Dynasty Power Inc.  Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 The Energy Authority WAPA BPAT NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 FAS 106 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-09-30 C001789 Excess Deferred Income Taxes (South Dakota) 2021-09-30 C001789 Macquarie Energy LLC BPA NWMT SFP Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 SOUTH DAKOTA 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group MATL Pacificorp NF Montana OATT MATL.NWMT BRDY 2021-01-012021-09-30 C001789 Sibanye-Stillwater Energy Keepers Inc. Stillwater Mining Company FNO Montana OATT Kerr Various in Montana 2021-01-012021-09-30 C001789 CHS, Inc. Morgan Stanley CHS, Inc. FNO Montana OATT MATL.NWMT Various in Montana 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group MATL Pacificorp NF Montana OATT MATL.NWMT JEFF 2021-01-012021-09-30 C001789 Montana Operations 2021-01-012021-09-30 C001789 Bonneville Power Administration BPA  Bonneville Power Administration FNO Montana OATT BPAT.NWMT    Various in Montana 2021-01-012021-09-30 C001789 Energy Keepers, Inc NWMT BPA NF Montana OATT KERR BPAT.NWMT 2021-01-012021-09-30 C001789 Natural Gas Transmission Verification Program (Montana) - Docket D2016.11.88 2021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind BPA NF Montana OATT GLWND1 BPAT.NWMT 2021-01-012021-09-30 C001789 Roseburg Forest Products Company Talen Energy Roseburg Forest Products Company FNO Montana OATT Colstrip Missoula, MT 2021-01-012021-09-30 C001789 Study of the Costs & Benefits of Customer Generators (Montana) 2021-07-012021-09-30 C001789 Bonneville Power Administration BPA NWMT NF Montana OATT BPAT.NWMT  NWMT.SYSTEM 2021-01-012021-09-30 C001789 ferc:ElectricUtilityMemberferc:IntangiblePlantMember 2021-01-012021-09-30 C001789 Manufactured Gas Plants (South Dakota) - Docket NG 11-003 2021-09-30 C001789 Tax Cut Jobs Act Deferral (South Dakota) - Docket NG-0095 and GE17-003 2021-09-30 C001789 Basin Creek Capital Lease (Montana) 2021-01-012021-09-30 C001789 Dynasty Power Inc.  WAPA AVISTA SFP Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-09-30 C001789 Macquarie Energy LLC NWMT BPA SFP Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-09-30 C001789 TransAlta Energy Marketing WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 MAG Energy Solutions WAPA MATL NF Montana OATT CROSSOVER MATL.NWMT 2021-01-012021-09-30 C001789 ferc:HydraulicProductionPlantConventionalMemberferc:ElectricUtilityMember 2021-01-012021-09-30 C001789 Montana Public Service Commission (Montana) - Docket 2017.9.78 - Order 7568 2021-09-30 C001789 FAS 106 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-06-30 C001789 Excess Deferred Income Taxes 2021-09-30 C001789 South Dakota Operationsferc:SeptemberMember 2021-01-012021-09-30 C001789 ferc:FebruaryMember Montana Operations 2021-01-012021-09-30 C001789 TransAlta Energy Marketing AVISTA NWMT NF Montana OATT AVAT.NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 EDF Trading North America, LLC NWMT MATL.NWMT NF Montana OATT COLSTRIP MATL.NWMT 2021-01-012021-09-30 C001789 Guzman Energy, LLC  BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 Vigilante Elec. Coop OLF 2021-01-012021-09-30 C001789 Other 2020-01-012020-09-30 C001789 Montana Public Service Commission Consumer Counsel Taxes (Montana) - Dockets 2017.9.78 and 2018.10.67 2021-09-30 C001789 Shell Energy North America WAPA Pacificorp NF Montana OATT CROSSOVER JEFF 2021-01-012021-09-30 C001789 ScheduleRegionalTransmissionServiceRevenuesAbstract 2021-01-012021-09-30 C001789 Idaho Power Company Pacificorp Idaho SFP Montana OATT JEFF TNDY 2021-01-012021-09-30 C001789 2021-01-012021-09-30 C001789 Montana Public Service Commission (Montana) - Docket 2017.9.78 - Order 7568 2021-06-30 C001789 Flow-through Income Taxes (Montana) 2021-09-30 C001789 Portland General Electric Company Colstrip Partners NWMT NF Montana OATT COLSTRIP TOWNSEND 2021-01-012021-09-30 C001789 Shell Energy North America Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Shell Energy North America NWMT BPA NF Montana OATT CROOKEDFALLS BPAT.NWMT 2021-01-012021-09-30 C001789 Town of Philipsburg Town of Philipsburg Town of Philipsburg FNO Montana OATT Philipsburg Substation Philipsburg, MT 2021-01-012021-09-30 C001789 Talen Montana, LLC Avista Energy Colstrip Steam Electric Station FNO Montana OATT Colstrip Nichols Pump Sub 2021-01-012021-09-30 C001789 PacifiCorp BPA Pacificorp SFP Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 Portland General Electric Company AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes 2021-06-30 C001789 Energy Keepers, Inc NWMT AVA SFP Montana OATT COLSTRIP AVAT.NWMT 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-09-30 C001789 EDF Trading North America, LLC NWMT NWMT NF Montana OATT COLSTRIP COLSTRIP 2021-01-012021-09-30 C001789 FAS 112 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-01-012021-09-30 C001789 Capital Power Energy Marketing, Inc. MATL BPAT NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Shell Energy North America Pacificorp AVISTA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 Glacier Electric Coop 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group MATL Glacier Wind NF Montana OATT MATL.NWMT GLWND1 2021-01-012021-09-30 C001789 ferc:AugustMember Montana Operations 2021-01-012021-09-30 C001789 Naturener Power Watch, LLC Glacier Wind Glacier Wind SFP Montana OATT GLWND1 GLWND2 2021-01-012021-09-30 C001789 Western Area Power Admin WAPA NWMT NF Montana OATT GREATFALLS NWMT.SYSTEM 2021-01-012021-09-30 C001789 Southwest Power Pool (SPP) SPP Various LFP SCH 7 Various Various 2021-01-012021-09-30 C001789 Flow-through Income Taxes (Montana) 2021-06-30 C001789 Macquarie Energy LLC Pacifcorp Pacificorp NF Montana OATT YTP JEFF 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE98-001 2021-06-30 C001789 Asset Retirement Obligation (South Dakota) 2021-07-012021-09-30 C001789 Dynasty Power Inc.  BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 ferc:TransmissionPlantMemberferc:ElectricUtilityMember 2021-01-012021-09-30 C001789 CTC QF Over/Under Collections (Montana) - Docket 97.9.90 and Docket 2001.1.15; Annual Amortization 2021-07-012021-09-30 C001789 Morgan Stanley Capital  Group CNTP Glacier Wind NF Montana OATT HARDIN GLWND1 2021-01-012021-09-30 C001789 Deferred Gas Storage Sales (Montana) - Docket D2001.1.1; Amortization 2001 - 2039 2021-01-012021-09-30 C001789 CTC QF Over/Under Collections (Montana) - Docket 97.9.90 and Docket 2001.1.15; Annual Amortization 2021-09-30 C001789 Basin Electric Power Cooperative NWMT Pacificorp NF Montana OATT COLSTRIP YTP 2021-01-012021-09-30 C001789 Avista Corporation NWMT Pacificorp NF Montana OATT COLSTRIP BRDY 2021-01-012021-09-30 C001789 ferc:AprilMember Montana Operations 2021-01-012021-09-30 C001789 Portland General Electric Company AVISTA AVISTA NF Montana OATT COLSTRIP AVAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group CNTP BPA NF Montana OATT HARDIN BPAT.NWMT 2021-01-012021-09-30 C001789 Dynasty Power Inc.  NWMT BPAT NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC WAPA BPA SFP Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 Aberdeen Manufactured Gas Plant (South Dakota) - Docket NG 11-003 2021-01-012021-09-30 C001789 Macquarie Energy LLC Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 East River FNS 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC Pacificorp NWMT SFP Montana OATT YTP NWMT.SYSTEM 2021-01-012021-09-30 C001789 Asset Retirement Obligation (Montana) 2021-06-30 C001789 Debt Financing Costs 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (Montana) 2021-01-012021-09-30 C001789 Dynasty Power Inc.  WAPA AVISTA NF Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group CNTP MATL SFP Montana OATT HARDIN MATL.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind BPA NF Montana OATT GLWND2 BPAT.NWMT 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group WAPA Pacificorp NF Montana OATT GREATFALLS BRDY 2021-01-012021-09-30 C001789 Macquarie Energy LLC NWMT BPA NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp WAPA NWMT SFP Montana OATT CROSSOVER NWMT.SYSTEM 2021-01-012021-09-30 C001789 TransAlta Energy Marketing BPA Pacificorp NF Montana OATT BPAT.NWMT BRDY 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp Pacificorp NWMT SFP Montana OATT BRDY NWMT.SYSTEM 2021-01-012021-09-30 C001789 Shell Energy North America Pacificorp AVISTA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind AVISTA NF Montana OATT GLWND1 AVAT.NWMT 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp WAPA Pacificorp NF Montana OATT CROSSOVER JEFF 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group BPA MATL SFP Montana OATT BPAT.NWMT MATL.NWMT 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (South Dakota) 2021-06-30 C001789 Compensated Absences (Montana) - Docket 97.11.219 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes 2021-07-012021-09-30 C001789 Portland General Electric Company AVISTA NWMT NF Montana OATT AVAT.NWMT COLSTRIP 2021-01-012021-09-30 C001789 Avista Corporation AVISTA AVISTA NF Montana OATT COLSTRIP AVAT.NMWT 2021-01-012021-09-30 C001789 Basin Electric Power Cooperative NWMT WAPA NF Montana OATT COLSTRIP GREATFALLS 2021-01-012021-09-30 C001789 Basin Electric Power Cooperative Pacificorp WAPA NF Montana OATT YTP GREATFALLS 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind BPA SFP Montana OATT GLWND2 BPAT.NWMT 2021-01-012021-09-30 C001789 Guzman Energy, LLC  Pacificorp AVISTA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (South Dakota) 2021-07-012021-09-30 C001789 Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637 2021-07-012021-09-30 C001789 ExxonMobil Corporation Talen Energy ExxonMobil Corporation FNO Montana OATT Colstrip Billings, MT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group WAPA MATL NF Montana OATT GREATFALLS MATL.NWMT 2021-01-012021-09-30 C001789 PacifiCorp NWMT NWMT SFP Montana OATT COLSTRIP NWMT.SYSTEM 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC WAPA Pacificorp SFP Montana OATT CROSSOVER YTP 2021-01-012021-09-30 C001789 PacifiCorp Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 SOUTH DAKOTA      2021-01-012021-09-30 C001789 Big Horn County Electric Coop. Inc. WAPA Big Horn County Electric Coop. Inc. FNO Montana OATT Various & Great Falls  Various in Montana 2021-01-012021-09-30 C001789 Powerex  Corporation Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (South Dakota) 2021-01-012021-09-30 C001789 Montana Public Service Commission Consumer Counsel Taxes (Montana) - Dockets 2017.9.78 and 2018.10.67 2021-01-012021-09-30 C001789 ferc:ElectricUtilityMember 2021-09-30 C001789 ferc:OtherUtilityMember 2021-09-30 C001789 2020-01-012020-09-30 C001789 2020-09-30 C001789 Line of Credit (Repayments) Borrowings, Net 2021-01-012021-09-30 C001789 EDF Trading North America, LLC AVISTA Pacificorp SFP Montana OATT AVAT,NWMT YTP 2021-01-012021-09-30 C001789 TransAlta Energy Marketing BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 Asset Retirement Obligation (South Dakota) 2021-09-30 C001789 Bonneville Power Admin NF 2021-01-012021-09-30 C001789 ferc:SeptemberMember Montana Operations 2021-01-012021-09-30 C001789 Montana Public Service Commission Consumer Counsel Taxes (Montana) - Dockets 2017.9.78 and 2018.10.67 2021-06-30 C001789 Macquarie Energy LLC NWMT AVISTA SFP Montana OATT MATL.NWMT AVAT.NWMT 2021-01-012021-09-30 C001789 Powerex  Corporation BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group MATL AVISTA NF Montana OATT MATL.NWMT AVAT.NWMT 2021-01-012021-09-30 C001789 GROTON, CITY OF WAPA GROTON LFP VOL 2 HURON 115 KV BUS GROTON 69 KV 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 2021-07-012021-09-30 C001789 Capital Power Energy Marketing, Inc. BPA NWMT NF Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 REC Silicon Company Morgan Stanley REC Silicon Company FNO Montana OATT Hardin  Butte, MT 2021-01-012021-09-30 C001789 ferc:TransmissionStudiesMember Line Interconnection Studies 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group MATL BPA NF Montana OATT MATL.NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind NWMT SFP Montana OATT GLWND2 GREATFALLS 2021-01-012021-09-30 C001789 Powerex  Corporation BPA AVISTA NF Montana OATT BPAT.NWMT AVAT.NWMT 2021-01-012021-09-30 C001789 Powerex  Corporation BPA Pacificorp SFP Montana OATT BPAT.NWMT BRDY 2021-01-012021-09-30 C001789 Puget Sound Energy Marketing Colstrip Partners BPA NF Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-09-30 C001789 Beartooth Electric Cooperative, Inc. WAPA Beartooth Electric Cooperative, Inc. FNO Montana OATT Fort Peck Various in Montana 2021-01-012021-09-30 C001789 ferc:GenerationStudiesMember 2021-01-012021-09-30 C001789 ferc:Quarter1Member South Dakota Operations 2021-01-012021-09-30 C001789 Guzman Energy, LLC  Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 South Dakota Operationsferc:JanuaryMember 2021-01-012021-09-30 C001789 South Dakota Operationsferc:AprilMember 2021-01-012021-09-30 C001789 Investment in Equity Securities 2020-01-012020-09-30 C001789 Portland General Electric Company Colstrip Partners AVISTA NF Montana OATT COLSTRIP AVAT.NWMT 2021-01-012021-09-30 C001789 Montana Public Service Commission (Montana) - Docket 2017.9.78 - Order 7568 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 Study of the Costs & Benefits of Customer Generators (Montana) 2021-09-30 C001789 The Energy Authority Pacificorp BPAT NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 PacifiCorp Pacificorp NWMT NF Montana OATT YTP COLSTRIP 2021-01-012021-09-30 C001789 Aspen Air U.S., LLC Talen Energy Aspen Air Corporation FNO Montana OATT Colstrip  Billings, MT 2021-01-012021-09-30 C001789 FAS 112 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-09-30 C001789 Dynasty Power Inc.  WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes 2021-01-012021-09-30 C001789 Shell Energy North America AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-09-30 C001789 Macquarie Energy LLC Pacificorp AVISTA SFP Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 Guzman Energy, LLC  AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-09-30 C001789 Line of Credit (Repayments) Borrowings, Net 2020-01-012020-09-30 C001789 Montana State University - Bozeman WAPA Montana State University - Bozeman FNO Montana OATT Fort Peck West Great Falls, MT 2021-01-012021-09-30 C001789 Montana Public Service Commission (Montana) - Docket 2017.9.78 - Order 7568 2021-07-012021-09-30 C001789 Pension Plan (Montana) 2021-07-012021-09-30 C001789 BPA Residential Exchange Program (Montana) - Docket 2018.8.49 Order 7630; Annual Amortization 2021-06-30 C001789 Phillips 66 Company Shell Energy Phillips 66 Company FNO Montana OATT BPAT.NWMT Various in Montana 2021-01-012021-09-30 C001789 Flow-through Income Taxes (Montana) 2021-01-012021-09-30 C001789 Compensated Absences (Montana) - Docket 97.11.219 2021-07-012021-09-30 C001789 CTC QF Over/Under Collections (Montana) - Docket 97.7.90 and Docket 2001.1.5; Annual Amortization 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (Montana) 2021-07-012021-09-30 C001789 Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization 2021-09-30 C001789 Western Area Power Admin WAPA NWMT NF Montana OATT CROSSOVER NWMT.SYSTEM 2021-01-012021-09-30 C001789 FAC Studiesferc:GenerationStudiesMember 2021-01-012021-09-30 C001789 The Energy Authority Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-09-30 C001789 Asset Retirement Obligation (South Dakota) 2021-06-30 C001789 MONTANA 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind Pacificorp NF Montana OATT GLWND1 BRDY 2021-01-012021-09-30 C001789 2020-07-012020-09-30 C001789 Macquarie Energy LLC BPA Pacificorp SFP Montana OATT BPAT.NWMT JEFF 2021-01-012021-09-30 C001789 CTC QF Over/Under Collections (Montana) - Docket 97.9.90 and Docket 2001.1.15; Annual Amortization 2021-01-012021-09-30 C001789 ferc:ElectricUtilityMemberferc:GeneralPlantMember 2021-01-012021-09-30 C001789 EDF Trading North America, LLC AVISTA BPA NF Montana OATT AVAT,NWMT BPAT.NWMT 2021-01-012021-09-30 C001789 Barretts Minerals, Inc. Energy Keepers inc. Barretts Minerals, Inc. FNO Montana OATT Kerr Dillon, MT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group WAPA BPA NF Montana OATT GREATFALLS BPAT.NWMT 2021-01-012021-09-30 C001789 Southwest Power Pool (SPP) SPP Various FNS SCH 9 Various Various 2021-01-012021-09-30 C001789 ferc:MarchMember Montana Operations 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind MATL NF Montana OATT GLWND1 MATL.NWMT 2021-01-012021-09-30 C001789 Guzman Energy, LLC  AVISTA Pacificorp SFP Montana OATT AVAT.NWMT YTP 2021-01-012021-09-30 C001789 Portland General Electric Company Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Market Monitoring & Compliance 2021-01-012021-09-30 C001789 MAG Energy Solutions WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 Market Monitoring & Compliance 2021-01-012021-03-31 C001789 General Mills Operations, LLC Talen Energy General Mills Operations, LLC FNO Montana OATT Colstrip Great Falls, MT 2021-01-012021-09-30 C001789 Basin Electric Power Cooperative Pacificorp NWMT NF Montana OATT YTP NWMT.SYSTEM 2021-01-012021-09-30 C001789 Idaho Power Company Pacificorp Idaho NF Montana OATT JEFF TNDY 2021-01-012021-09-30 C001789 The Energy Authority Pacificorp AVA NF Montana OATT YTP AVAT.NWMT 2021-01-012021-09-30 C001789 EDF Trading North America, LLC AVISTA AVISTA NF Montana OATT COLSTRIP AVAT.NWMT 2021-01-012021-09-30 C001789 Deferred Gas Storage Sales (Montana) - Docket D2001.1.1; Amortization 2001 - 2039 2021-07-012021-09-30 C001789 ferc:OtherUtility3Member 2021-09-30 C001789 Field Inventory (South Dakota) - Docket EL 14-106 2021-01-012021-09-30 C001789 Calumet Refining, LLC Talen Energy Calumet Montana Refining Company, Inc. FNO Montana OATT Colstrip Great Falls, MT 2021-01-012021-09-30 C001789 Shell Energy North America WAPA AVISTA NF Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-09-30 C001789 FAS 106 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-07-012021-09-30 C001789 South Dakota Operationsferc:Quarter3Member 2021-01-012021-09-30 C001789 Powerex  Corporation BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 FAS 106 (Montana) - Docket 93.6.24 and Docket 2009.9.129 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group AVISTA MATL SFP Montana OATT AVAT.NWMT MATL.NWMT 2021-01-012021-09-30 C001789 Basin Electric Power Cooperative Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp WAPA AVISTA SFP Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-09-30 C001789 Avista NF 2021-01-012021-09-30 C001789 Southwest Power Pool (SPP) SPP Various NF SCH 8 Various Various 2021-01-012021-09-30 C001789 ferc:MarchMember South Dakota Operations 2021-01-012021-09-30 C001789 CTC QF Over/Under Collections (Montana) - Docket 97.7.90 and Docket 2001.1.5; Annual Amortization 2021-06-30 C001789 Morgan Stanley Capital  Group BPA MATL NF Montana OATT BPAT.NWMT MATL.NWMT 2021-01-012021-09-30 C001789 Other Noncash Charges to Income, Net 2020-01-012020-09-30 C001789 GCC Three Forks, LLC Energy Keepers Inc. GCC Three Forks, LLC FNO Montana OATT Kerr Three Forks, MT 2021-01-012021-09-30 C001789 BPA Residential Exchange Program (Montana) - Docket 2018.8.49 Order 7630; Annual Amortization 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group CNTP MATL NF Montana OATT HARDIN MATL.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind NWMT SFP Montana OATT GLWND2 NWMT.SYSTEM 2021-01-012021-09-30 C001789 Tax Cut Jobs Act Deferral (South Dakota) - Docket NG-0095 and GE17-003 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind Glacier Wind NF Montana OATT GLWND1 GLWND2 2021-01-012021-09-30 C001789 BRYANT, CITY OF WAPA BRYANT LFP VOL 2 HURON 115 KV BUS BRYANT 25 KV 2021-01-012021-09-30 C001789 Guzman Energy, LLC  Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Dynasty Power Inc.  AVISTA Pacificorp NF Montana OATT AVAT.NWMT YTP 2021-01-012021-09-30 C001789 Pension Plan (South Dakota) 2021-09-30 C001789 Compensated Absences (Montana) - Docket 97.11.219 2021-06-30 C001789 BPA Residential Exchange Program (Montana) - Docket 2018.8.49 Order 7630; Annual Amortization 2021-07-012021-09-30 C001789 ferc:GasUtilityMember 2020-01-012020-09-30 C001789 Powerex  Corporation WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 FAC Studies 2021-01-012021-09-30 C001789 Western Area Power Admin WAPA WAPA SFP Montana OATT GREATFALLS CROSSOVER 2021-01-012021-09-30 C001789 South Dakota Operationsferc:JulyMember 2021-01-012021-09-30 C001789 The Energy Authority WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-09-30 C001789 Portland General Electric Company BPA NWMT NF Montana OATT BPAT.NWMT COLSTRIP 2021-01-012021-09-30 C001789 The Energy Authority Pacificorp BPAT NF Montana OATT BRDY BPAT.NWMT 2021-01-012021-09-30 C001789 Pension Plan (Montana) 2021-09-30 C001789 Natural Gas Transmission Verification Program (Montana) - Docket D2016.11.88 2021-01-012021-09-30 C001789 Manufactured Gas Plants (South Dakota) - Docket NG 11-003 2021-06-30 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT COLSTRIP JEFF 2021-01-012021-09-30 C001789 South Dakota Operationsferc:AugustMember 2021-01-012021-09-30 C001789 Basin Electric Power Cooperative WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-09-30 C001789 Study of the Costs & Benefits of Customer Generators (Montana) 2021-01-012021-09-30 C001789 MAG Energy Solutions WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-09-30 C001789 Macquarie Energy LLC Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 BPA Residential Exchange Program (Montana) - Docket 2018.8.49 Order 7630; Annual Amortization 2021-09-30 C001789 Phillips 66 Company BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-09-30 C001789 Shell Energy North America BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 Unbilled Revenues (South Dakota) 2021-01-012021-09-30 C001789 Energy Keepers, Inc NWMT BPA LFP Montana OATT KERR BPAT.NWMT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group AVISTA MATL NF Montana OATT AVAT.NWMT MATL.NWMT 2021-01-012021-09-30 C001789 Macquarie Energy LLC NWMT Pacificorp SFP Montana OATT COLSTRIP JEFF 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group MATL AVISTA SFP Montana OATT MATL.NWMT AVAT.NWMT 2021-01-012021-09-30 C001789 ferc:ElectricUtilityMemberferc:OtherProductionPlantMember 2021-01-012021-09-30 C001789 Rainbow Energy Marketing Corp WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 Dynasty Power Inc.  Pacificorp Pacificorp NF Montana OATT YTP BRDY 2021-01-012021-09-30 C001789 Energy Keepers, Inc BPA Pacificorp SFP Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group AVISTA Glacier Wind NF Montana OATT AVAT.NWMT GLWND1 2021-01-012021-09-30 C001789 Dynasty Power Inc.  Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-09-30 C001789 Great Falls Public Schools Energy Keepers Inc. Great Falls Public Schools FNO Montana OATT Kerr Great Falls, MT 2021-01-012021-09-30 C001789 Current Ad Valorem True-Up (South Dakota) - Docket GE 98-001 2021-06-30 C001789 ferc:JuneMember Montana Operations 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group MATL Pacificorp SFP Montana OATT MATL.NWMT JEFF 2021-01-012021-09-30 C001789 Portland General Electric Company Colstrip Partners BPA NF Montana OATT COLSTRIP BPAT.NWMT 2021-01-012021-09-30 C001789 Macquarie Energy LLC BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 Ash Grove Cement Energy Keepers Inc. Ash Grove Cement FNO Montana OATT Kerr Clancy, MT 2021-01-012021-09-30 C001789 Pension Plan (Montana) 2021-01-012021-09-30 C001789 Flow-through Income Taxes (South 2021-07-012021-09-30 C001789 Western Area Power Administration WAPA Malmstrom Air Force Base FNO Montana OATT Fort Peck West Great Falls, MT 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group WAPA Pacificorp NF Montana OATT GREATFALLS JEFF 2021-01-012021-09-30 C001789 FEA Studiesferc:GenerationStudiesMember 2021-01-012021-09-30 C001789 Western Area Power Admin WAPA WAPA NF Montana OATT CANYONFERRY CROSSOVER 2021-01-012021-09-30 C001789 Line Interconnection Studies 2021-01-012021-09-30 C001789 Macquarie Energy LLC Pacifcorp NWMT NF Montana OATT YTP MATL.NWMT 2021-01-012021-09-30 C001789 Shell Energy North America Pacificorp BPA SFP Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Macquarie Energy LLC BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-09-30 C001789 ferc:DistributionPlantMemberferc:ElectricUtilityMember 2021-01-012021-09-30 C001789 Treasury Stock Activity 2020-01-012020-09-30 C001789 Suiza Dairy Group, LLC Talen Energy Suiza Dairy Group, LLC FNO Montana OATT Colstrip Various in Montana 2021-01-012021-09-30 C001789 The Energy Authority BPA Pacificorp NF Montana OATT BPAT.NWMT JEFF 2021-01-012021-09-30 C001789 Bonneville Power Admin OLF 2021-01-012021-09-30 C001789 Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637 2021-01-012021-09-30 C001789 ferc:TransmissionStudiesMember FAC Studies 2021-01-012021-09-30 C001789 Dynasty Power Inc.  Pacificorp NWMT NF Montana OATT BRDY MATL.NWMT 2021-01-012021-09-30 C001789 Energy Keepers, Inc NWMT Pacificorp NF Montana OATT COLSTRIP BRDY 2021-01-012021-09-30 C001789 Asset Retirement Obligation (Montana) 2021-01-012021-09-30 C001789 The Energy Authority BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 South Dakota Operationsferc:Quarter2Member 2021-01-012021-09-30 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT COLSTRIP BRDY 2021-01-012021-09-30 C001789 Dynasty Power Inc.  BPA NWMT NF Montana OATT BPAT.NWMT MATL.NWMT 2021-01-012021-09-30 C001789 Line of Credit (Repayments) Borrowings, Net 2021-01-012021-09-30 C001789 Macquarie Energy LLC WAPA BPA NF Montana OATT CROSSOVER BPAT.NWMT 2021-01-012021-09-30 C001789 Puget Sound Energy Marketing BPA NWMT NF Montana OATT BPAT.NWMT COLSTRIP 2021-01-012021-09-30 C001789 Treasury Stock Activity 2021-01-012021-09-30 C001789 Flow-through Income Taxes (South 2021-01-012021-09-30 C001789 Capital Power Energy Marketing, Inc. BPA MATL NF Montana OATT BPAT.NWMT MATL.NWMT 2021-01-012021-09-30 C001789 Market Monitoring & Compliance 2021-01-012021-06-30 C001789 Morgan Stanley Capital  Group BPA Glacier Wind NF Montana OATT BPAT.NWMT GLWND1 2021-01-012021-09-30 C001789 Energy Keepers, Inc NWMT Pacificorp LFP Montana OATT KERR BRDY 2021-01-012021-09-30 C001789 ferc:GenerationStudiesMember SIS Studies 2021-01-012021-09-30 C001789 ferc:MayMember Montana Operations 2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (Montana) 2021-06-30 C001789 2021-06-30 C001789 Shell Energy North America WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind AVISTA NF Montana OATT GLWND2 AVAT.NWMT 2021-01-012021-09-30 C001789 Dynasty Power Inc.  Pacificorp Pacificorp NF Montana OATT YTP JEFF 2021-01-012021-09-30 C001789 Portland General Electric Company BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 Atlas Power, LLC Tenaska Atlas Power, LLC FNO Montana OATT BPAT.NWMT Butte, MT 2021-01-012021-09-30 C001789 Day Ahead & Real Time Admin 2021-01-012021-03-31 C001789 MAG Energy Solutions NWMT Pacificorp NF Montana OATT MATL.NWMT JEFF 2021-01-012021-09-30 C001789 TransAlta Energy Marketing WAPA Pacificorp NF Montana OATT CROSSOVER BRDY 2021-01-012021-09-30 C001789 Southwest Power Pool 2021-01-012021-09-30 C001789 Bonneville Power Administration BPA Pacificorp NF Montana OATT BPAT.NWMT  YTP 2021-01-012021-09-30 C001789 Cycle Power Partners LLC NWMT Pacificorp NF Montana OATT HORSESHOE BRDY 2021-01-012021-09-30 C001789 The Energy Authority BPA WAPA NF Montana OATT BPAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 ferc:ElectricUtilityMember 2020-01-012020-09-30 C001789 Unbilled Revenues (South Dakota) 2021-07-012021-09-30 C001789 Rainbow Energy Marketing Corp Pacificorp WAPA NF Montana OATT YTP CROSSOVER 2021-01-012021-09-30 C001789 2019-12-31 C001789 Deferred Gas Storage Sales (Montana) - Docket D2001.1.1; Amortization 2001 - 2039 2021-09-30 C001789 ferc:Quarter1Member Montana Operations 2021-01-012021-09-30 C001789 The Energy Authority Pacificorp WAPA NF Montana OATT BRDY CROSSOVER 2021-01-012021-09-30 C001789 Day Ahead & Real Time Admin 2021-01-012021-06-30 C001789 South Dakota Operationsferc:JuneMember 2021-01-012021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind BPA SFP Montana OATT GLWND1 BPAT.NWMT 2021-01-012021-09-30 C001789 Aberdeen Manufactured Gas Plant (South Dakota) - Docket NG 11-003 2021-06-30 C001789 Basin Electric Power Cooperative WAPA WAPA LFP Montana OATT CROSSOVER GREATFALLS 2021-01-012021-09-30 C001789 Pension Plan (Montana) 2021-06-30 C001789 Unbilled Revenues (South Dakota) 2021-06-30 C001789 Morgan Stanley Capital  Group Glacier Wind AVISTA SFP Montana OATT GLWND1 AVAT.NWMT 2021-01-012021-09-30 C001789 The Energy Authority WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-09-30 C001789 Natural Gas Transmission Verification Program (Montana) - Docket D2016.11.88 2021-06-30 C001789 The Energy Authority Pacificorp Pacificorp NF Montana OATT YTP JEFF 2021-01-012021-09-30 C001789 The Energy Authority WAPA AVA NF Montana OATT CROSSOVER AVAT.NWMT 2021-01-012021-09-30 C001789 MONTANA CHOICE TRANSMISSION      2021-01-012021-09-30 C001789 Excess Deferred Income Taxes (Montana) 2021-09-30 C001789 EDF Trading North America, LLC AVISTA NWMT NF Montana OATT AVAT,NWMT GTFALLSNWMT 2021-01-012021-09-30 C001789 Portland General Electric Company BPA NWMT NF Montana OATT BPAT.NWMT NWMT.SYSTEM 2021-01-012021-09-30 C001789 Day Ahead & Real Time Admin 2021-01-012021-09-30 C001789 ferc:JulyMember Montana Operations 2021-01-012021-09-30 C001789 Compensated Absences (Montana) - Docket 97.11.219 2021-09-30 C001789 Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637 2021-09-30 C001789 Morgan Stanley Capital  Group Glacier Wind Pacificorp NF Montana OATT GLWND2 BRDY 2021-01-012021-09-30 C001789 2021-01-012021-06-30 C001789 South Dakota Operationsferc:FebruaryMember 2021-01-012021-09-30 C001789 TransAlta Energy Marketing Pacificorp BPA NF Montana OATT YTP BPAT.NWMT 2021-01-012021-09-30 C001789 Montana Public Service Commission Consumer Counsel Taxes (Montana) - Dockets 2017.9.78 and 2018.10.67 2021-07-012021-09-30 C001789 Morgan Stanley Capital  Group NWMT MATL NF Montana OATT COLSTRIP MATL.NWMT 2021-01-012021-09-30 C001789 Southwest Power Pool FNS 2021-01-012021-09-30 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT MATL.NWMT JEFF 2021-01-012021-09-30 C001789 Brookfield Energy Marketing LP NWMT WAPA NF Montana OATT COLSTRIP CROSSOVER 2021-01-012021-09-30 C001789 Mercuria Energy America, LLC WAPA Pacificorp NF Montana OATT CROSSOVER YTP 2021-01-012021-09-30 C001789 Portland General Electric Company Colstrip Partners Pacificorp SFP Montana OATT COLSTRIP BRDY 2021-01-012021-09-30 C001789 Macquarie Energy LLC NWMT Pacificorp NF Montana OATT STILLWIND JEFF 2021-01-012021-09-30 C001789 ferc:SteamProductionPlantMemberferc:ElectricUtilityMember 2021-01-012021-09-30 C001789 Dynasty Power Inc.  BPA Pacificorp NF Montana OATT BPAT.NWMT YTP 2021-01-012021-09-30 C001789 EDF Trading North America, LLC BPA NWMT NF Montana OATT BPAT.NWMT COLSTRIP 2021-01-012021-09-30 C001789 Powerex  Corporation AVISTA WAPA NF Montana OATT AVAT.NWMT CROSSOVER 2021-01-012021-09-30 C001789 CTC QF Over/Under Collections (Montana) - Docket 97.7.90 and Docket 2001.1.5; Annual Amortization 2021-07-012021-09-30 C001789 Aberdeen Manufactured Gas Plant (South Dakota) - Docket NG 11-003 2021-09-30 utr:MWh iso4217:USD ns:year utr:MW xbrli:pure
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
/
Q3


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 and Licensees 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 Forms 1 and 3-Q electronically through the forms submission software. Retain one copy of each report for your files. Any electronic submission must be created by using the forms submission software provided free by the Commission at its web site: http://www.ferc.gov/docs-filing/forms/form-1/elec-subm-soft.asp. The software is used to submit the electronic filing to the Commission via the Internet.
    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 for the year ended on which we have reported separately under date of , we have also reviewed 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. To further that effort, new selections, “Annual Report to Stockholders,” and “CPA Certification Statement” have been added to the dropdown “pick list” from which companies must choose when eFiling. Further instructions are found on the Commission’s website at http://www.ferc.gov/help/how-to.asp.
    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 http://www.ferc.gov/docs-filing/forms/form-1/form-1.pdf and http://www.ferc.gov/docs-filing/forms.asp#3Q-gas .
  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, submit the electronic filing using the form submission software only. 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.
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 be 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 salt 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.
1/3-Q

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
/
Q3
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 StreetSioux Falls, SD 57108
05 Name of Contact Person

Elaine A. Vesco
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)

09/30/2021
Quarterly 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)

11/29/2021
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:

09/30/2021
Year/Period of Report

End of:
2021
/
Q3
List of Schedules

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 (Electric Utility)
2
1
ScheduleImportantChangesDuringTheQuarterYearAbstract
Important Changes During the Quarter
108
2
ScheduleComparativeBalanceSheetAbstract
Comparative Balance Sheet
110
3
ScheduleStatementOfIncomeAbstract
Statement of Income for the Quarter
114
4
ScheduleRetainedEarningsAbstract
Statement of Retained Earnings for the Quarter
118
5
ScheduleStatementOfCashFlowsAbstract
Statement of Cash Flows
120
6
ScheduleNotesToFinancialStatementsAbstract
Notes to Financial Statements
122
7
ScheduleStatementOfAccumulatedOtherComprehensiveIncomeAndHedgingActivitiesAbstract
Statement of Accum Comp Income, Comp Income, and Hedging Activities
122a
8
ScheduleSummaryOfUtilityPlantAndAccumulatedProvisionsForDepreciationAmortizationAndDepletionAbstract
Summary of Utility Plant & Accumulated Provisions for Dep, Amort & Dep
200
9
ScheduleElectricPlantInServiceAndAccumulatedProvisionForDepreciationByFunctionAbstract
Electric Plant In Service and Accum Provision For Depr by Function
208
10
ScheduleTransmissionServiceAndGenerationInterconnectionStudyCostsAbstract
Transmission Service and Generation Interconnection Study Costs
231
11
ScheduleOtherRegulatoryAssetsAbstract
Other Regulatory Assets
232
12
ScheduleOtherRegulatoryLiabilitiesAbstract
Other Regulatory Liabilities
278
13
ScheduleElectricOperatingRevenuesAbstract
Elec Operating Revenues (Individual Schedule Lines 300-301)
300
14
ScheduleRegionalTransmissionServiceRevenuesAbstract
Regional Transmission Service Revenues (Account 457.1)
302
Not Applicable
15
ScheduleElectricProductionOtherPowerTransmissionRegionalExpensesAbstract
Electric Prod, Other Power Supply Exp, Trans and Distrib Exp
324
16
ScheduleElectricCustomerAccountServiceSalesAdministrativeAndGeneralExpensesAbstract
Electric Customer Accts, Service, Sales, Admin and General Expenses
325
17
ScheduleTransmissionOfElectricityForOthersAbstract
Transmission of Electricity for Others
328
18
ScheduleTransmissionOfElectricityByIsoOrRtoAbstract
Transmission of Electricity by ISO/RTOs
331
Not Applicable
19
ScheduleTransmissionOfElectricityByOthersAbstract
Transmission of Electricity by Others
332
20
ScheduleDepreciationDepletionAndAmortizationsAbstract
Deprec, Depl and Amort of Elec Plant (403,403.1,404,and 405) (except Amortization of Acquisition Adjustments)
338
21
ScheduleAmountsIncludedInIsoOrRtoSettlementAbstract
Amounts Included in ISO/RTO Settlement Statements
397
22
ScheduleMonthlyPeaksAndOutputAbstract
Monthly Peak Loads and Energy Output
399
23
ScheduleMonthlyTransmissionSystemPeakLoadAbstract
Monthly Transmission System Peak Load
400
24
ScheduleMonthlyIsoOrRtoTransmissionSystemPeakLoadAbstract
Monthly ISO/RTO Transmission System Peak Load
400a


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

09/30/2021
Year/Period of Report

End of:
2021
/
Q3
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 Page 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 6, "Financing Activities", FERC Order ES19-36-000 and MPSC Order Number 7691 Docket Number D2019.08.046.
7. None
8. None
9. See Note 8, "Commitments and Contingencies".
10. None
12. None
13. None.
14. NA


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

09/30/2021
Year/Period of Report

End of:
2021
/
Q3
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
6,937,449,682
6,797,205,052
3
ConstructionWorkInProgress
Construction Work in Progress (107)
200
332,964,376
166,454,010
4
UtilityPlantAndConstructionWorkInProgress
TOTAL Utility Plant (Enter Total of lines 2 and 3)
7,270,414,058
6,963,659,062
5
AccumulatedProvisionForDepreciationAmortizationAndDepletionOfPlantUtility
(Less) Accum. Prov. for Depr. Amort. Depl. (108, 110, 111, 115)
200
2,639,723,924
2,527,092,610
6
UtilityPlantNet
Net Utility Plant (Enter Total of line 4 less 5)
4,630,690,134
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)
4,630,690,134
4,436,566,452
15
OtherElectricPlantAdjustments
Utility Plant Adjustments (116)
357,585,527
357,585,527
16
GasStoredUndergroundNoncurrent
Gas Stored Underground - Noncurrent (117)
36,195,392
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
23,857,159
23,732,943
23
NoncurrentPortionOfAllowances
Noncurrent Portion of Allowances
228
24
OtherInvestments
Other Investments (124)
18,105,673
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)
42,620,367
69,875,185
33
CurrentAndAccruedAssetsAbstract
CURRENT AND ACCRUED ASSETS
34
CashAndWorkingFunds
Cash and Working Funds (Non-major Only) (130)
35
Cash
Cash (131)
7,118,962
5,454,203
36
SpecialDeposits
Special Deposits (132-134)
14,354,954
9,670,293
37
WorkingFunds
Working Fund (135)
22,950
22,950
38
TemporaryCashInvestments
Temporary Cash Investments (136)
39
NotesReceivable
Notes Receivable (141)
40
CustomerAccountsReceivable
Customer Accounts Receivable (142)
67,018,811
73,728,730
41
OtherAccountsReceivable
Other Accounts Receivable (143)
9,418,599
14,106,165
42
AccumulatedProvisionForUncollectibleAccountsCredit
(Less) Accum. Prov. for Uncollectible Acct.-Credit (144)
2,279,229
5,609,532
43
NotesReceivableFromAssociatedCompanies
Notes Receivable from Associated Companies (145)
44
AccountsReceivableFromAssociatedCompanies
Accounts Receivable from Assoc. Companies (146)
3,375,189
1,752,345
45
FuelStock
Fuel Stock (151)
227
5,907,131
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
51,042,815
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)
26,716,542
10,010,097
56
LiquefiedNaturalGasStoredAndHeldForProcessing
Liquefied Natural Gas Stored and Held for Processing (164.2-164.3)
57
Prepayments
Prepayments (165)
(a)
22,756,605
15,375,451
58
AdvancesForGas
Advances for Gas (166-167)
59
InterestAndDividendsReceivable
Interest and Dividends Receivable (171)
60
RentsReceivable
Rents Receivable (172)
45,653
49,263
61
AccruedUtilityRevenues
Accrued Utility Revenues (173)
58,184,117
80,492,128
62
MiscellaneousCurrentAndAccruedAssets
Miscellaneous Current and Accrued Assets (174)
201,402
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)
263,481,697
255,499,406
68
DeferredDebitsAbstract
DEFERRED DEBITS
69
UnamortizedDebtExpense
Unamortized Debt Expenses (181)
11,503,550
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
721,337,952
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)
3,731
3,634
77
TemporaryFacilities
Temporary Facilities (185)
78
MiscellaneousDeferredDebits
Miscellaneous Deferred Debits (186)
233
8,748,006
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)
26,396,490
28,350,312
82
AccumulatedDeferredIncomeTaxes
Accumulated Deferred Income Taxes (190)
234
168,780,005
170,834,539
83
UnrecoveredPurchasedGasCosts
Unrecovered Purchased Gas Costs (191)
90,536,374
5,905,571
84
DeferredDebits
Total Deferred Debits (lines 69 through 83)
1,027,306,108
940,684,307
85
AssetsAndOtherDebits
TOTAL ASSETS (lines 14-16, 32, 67, and 84)
6,357,879,225
6,096,407,741


Name of Respondent:

NorthWestern Corporation
This report is:

(1)
An Original

(2)
A Resubmission
Date of Report:

09/30/2021
Year/Period of Report

End of:
2021
/
Q3
FOOTNOTE DATA

(a) Concept: Prepayments
South Dakota Operations Prepayments (165) are $16,418,072 and $12,840,333 for 2021 and 2020, respectively.

Montana Operations Prepayments (165) are $6,338,533 and $2,535,118 for 2021 and 2020, respectively.
(b) Concept: UnamortizedLossOnReacquiredDebt
Montana Operations Unamortized Loss on Reacquired Debt (189) is $23,051,761 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:

09/30/2021
Year/Period of Report

End of:
2021
/
Q3
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
561,577
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
1,641,389,752
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
707,532,155
666,673,846
12
UnappropriatedUndistributedSubsidiaryEarnings
Unappropriated Undistributed Subsidiary Earnings (216.1)
118
791,902
1,295,383
13
ReacquiredCapitalStock
(Less) Reaquired Capital Stock (217)
250
98,423,508
98,075,421
14
NoncorporateProprietorship
Noncorporate Proprietorship (Non-major only) (218)
15
AccumulatedOtherComprehensiveIncome
Accumulated Other Comprehensive Income (219)
122(a)(b)
5,319,302
5,126,145
16
ProprietaryCapital
Total Proprietary Capital (lines 2 through 15)
2,246,532,576
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
295,000,000
248,976,900
22
UnamortizedPremiumOnLongTermDebt
Unamortized Premium on Long-Term Debt (225)
23
UnamortizedDiscountOnLongTermDebtDebit
(Less) Unamortized Discount on Long-Term Debt-Debit (226)
68,472
24
LongTermDebt
Total Long-Term Debt (lines 18 through 23)
2,474,591,528
2,328,636,900
25
OtherNoncurrentLiabilitiesAbstract
OTHER NONCURRENT LIABILITIES
26
ObligationsUnderCapitalLeaseNoncurrent
Obligations Under Capital Leases - Noncurrent (227)
13,707,650
16,379,639
27
AccumulatedProvisionForPropertyInsurance
Accumulated Provision for Property Insurance (228.1)
28
AccumulatedProvisionForInjuriesAndDamages
Accumulated Provision for Injuries and Damages (228.2)
(a)
7,292,871
6,050,644
29
AccumulatedProvisionForPensionsAndBenefits
Accumulated Provision for Pensions and Benefits (228.3)
(b)
7,554,864
10,240,902
30
AccumulatedMiscellaneousOperatingProvisions
Accumulated Miscellaneous Operating Provisions (228.4)
90,651,322
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)
44,622,599
45,355,157
35
OtherNoncurrentLiabilities
Total Other Noncurrent Liabilities (lines 26 through 34)
163,829,306
195,485,230
36
CurrentAndAccruedLiabilitiesAbstract
CURRENT AND ACCRUED LIABILITIES
37
NotesPayable
Notes Payable (231)
100,000,000
38
AccountsPayable
Accounts Payable (232)
97,004,074
104,724,988
39
NotesPayableToAssociatedCompanies
Notes Payable to Associated Companies (233)
40
AccountsPayableToAssociatedCompanies
Accounts Payable to Associated Companies (234)
3,853,831
3,622,020
41
CustomerDeposits
Customer Deposits (235)
6,343,923
6,000,316
42
TaxesAccrued
Taxes Accrued (236)
262
130,744,369
84,528,451
43
InterestAccrued
Interest Accrued (237)
26,324,304
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)
1,264,491
1,432,362
48
MiscellaneousCurrentAndAccruedLiabilities
Miscellaneous Current and Accrued Liabilities (242)
(c)
65,896,292
75,300,662
49
ObligationsUnderCapitalLeasesCurrent
Obligations Under Capital Leases-Current (243)
4,071,671
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)
335,502,955
397,594,640
55