Thompson Falls Hydroelectric Project Relicensing

SOUTH DAKOTA FLOODING: Flooding is expected in some areas of Eastern South Dakota due to heavy rain. Please contact us if your electricity or natural gas needs to be shut off due to flooding. Learn more about Flood Safety.

General Information

Thompson Falls is undergoing relicensing which is expected to be completed in 2025.

Relicensing Schedule

May 2024 105 KB

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FERC ILP Study Criteria Guide

March 2012 1960 KB

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FERC ILP Process

September 2018 581 KB

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May 2024 AIR Response

FERC Grants Extension of Time for AIR

March 22 FERC D2SI AIR

May 2024 204 KB

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Attachment C - Exhibit E

May 2024 25084 KB

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Attachment D - Exhibit G

May 2024 2351 KB

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Attachment G - TDG Control Plan

Attachment H - Recreation Management Plan

May 2024 5350 KB

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AIR Attachment A, E, F, J, K

May 2024 4512 KB

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Attachment B - Exhibit A

Final License Application

FLA Volume I – Initial Statement, Exhibits A, B, C, D, G, H

December 2023 6846 KB

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FLA Volume II – Exhibit E

May 2024 44350 KB

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Final Study Report

Fish Behavior Final Study Report

December 2023 3521 KB

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Draft License Application

DLA Volume I – Initial Statement, Exhibits A, B, C, D, G, H

August 2023 PDF 5712 KB

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DLA Volume II – Exhibit E

August 2023 PDF 44905 KB

Updated Study Reports

NorthWestern’s Response to Comments on Updated Study Report

Executive Summary USR

May 2023 1506 KB

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Operations Study Updated Study Report

May 2023 5136 KB

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Fish Behavior Updated Study Report

May 2023 7675 KB

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Environmental Justice Updated Study Report

May 2023 920 KB

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Hydraulic Conditions Updated Study Report

May 2023 20606 KB

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Total Dissolved Gas Updated Study Report

May 2023 4916 KB

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Relicensing Documents

Dock Mitigation Program Presentation

October 2023 236 KB

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NorthWestern’s Response to Comments on Initial Study Report

August 2022 1066 KB

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Initial Study Report Meeting Summary

June 2022 13604 KB

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P1869 ISR Executive Summary

April 2022 PDF 718 KB

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P1869 ISR Operations Study

April 2022 PDF 16266 KB

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P1869 ISR Total Dissolved Gas Study

April 2022 PDF 861 KB

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P1869 ISR Hydraulic Conditions Study

April 2022 PDF 21999 KB

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P1869 ISR Fish Behavior Study

April 2022 PDF 2695 KB

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P1869 ISR Visitor Use Survey

April 2022 PDF 1069 KB

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P1869 ISR Cultural Resources NR Nomination

April 2022 PDF 34092 KB

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P1869 ISR Downstream Fish Passage Literature Review

April 2022 PDF 850 KB

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FERC Relicensing Meeting

September 2018 314 KB

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Revised Study Plan Project No. 1869

April 2021 18350 KB

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Pre-Application Document Project No. 1869

July 2020 22450 KB

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Proposed Study Plan Project No. 1869

December 2020 3956 KB

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Notice of Intent to File License Application and Pre-Application Document Project No. 1869

FERC Study Plan Determination

May 2021 399 KB

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FERC Notice of Commencement of Pre-Filing Process and Scoping

August 2020 143 KB

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Meetings

Updated Study Report Meeting Summary

June 2023 10267 KB

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Updated Study Report Meeting Summary Supplement

June 2023 613 KB

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Initial Study Report Meeting Combined Presentation

May 2022 17556 KB

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Thompson Falls Relicensing Initial Study Report Meeting Agenda

April 2022 236 KB

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FERC Relicensing Meeting Postcard

April 2022 1488 KB

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Thompson Falls Relicensing Proposed Study Plan Evening Meeting Presentation

January 2021 4516 KB

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Thompson Falls Relicensing Proposed Study Plan Daytime Meeting Presentation

January 2021 PDF 12074 KB

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Thompson Falls Relicensing Proposed Study Plan Meeting

January 2021 659 KB

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Thompson Falls Relicensing Public Outreach Meeting

March 2020 17373 KB

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Thompson Falls Relicensing Baseline Environmental Document Workshop

December 2018 2084 KB

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FERC 101 Relicensing Outreach Training Meeting Summary

September 2018 87 KB

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FERC Outreach Presentation

September 2018 1646 KB

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SOUTH DAKOTA FLOODING: Flooding is expected in some areas of Eastern South Dakota due to heavy rain. Please contact us if your electricity or natural gas needs to be shut off due to flooding. Learn more about Flood Safety.

For Business

Helping Create a Bright Future

Thompson Falls Relicensing

General Information

May 2024 AIR Response

Final License Application

Final Study Report

Draft License Application

Updated Study Reports

Relicensing Documents

Meetings