Directory of Power Plants in Montana
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Colstrip | Talen Montana LLC | Colstrip, MT | NorthWestern Corporation (NWMT) | 9.2 TWh | Oct 1975 | Aug 2024 | Subbituminous Coal : 99.9% |
| Libby | USACE Northwestern Division | Libby, MT | Bonneville Power Administration (BPAT) | 1.6 TWh | Jul 1975 | Dec 2023 | Water |
| Clearwater Wind I | Clearwater Energy Resources LLC | Miles City, MT | Puget Sound Energy, Inc. (PSEI) | 1.3 TWh | Oct 2022 | Aug 2024 | Wind |
| Noxon Rapids | Avista Corp | Noxon, MT | Avista Corporation (AVA) | 1.3 TWh | Aug 1959 | Dec 2023 | Water |
| Yellowtail | U S Bureau of Reclamation | Hardin, MT | Western Area Power Administration - Upper Great Plains West (WAUW) | 846.0 GWh | Jul 1966 | Dec 2023 | Water |
| Selis Ksanka Qlispe | Energy Keepers Inc | Polson, MT | NorthWestern Corporation (NWMT) | 804.8 GWh | Sep 1938 | Dec 2023 | Water |
| Pryor Mountain Wind | PacifiCorp | Bridger, MT | PacifiCorp East (PACE) | 703.9 GWh | Mar 2021 | Aug 2024 | Wind |
| Fort Peck | USACE-Omaha | Fort Peck, MT | Western Area Power Administration - Upper Great Plains West (WAUW) | 701.2 GWh | Jun 1943 | Dec 2023 | Water |
| Hungry Horse | U S Bureau of Reclamation | Columbia Falls, MT | Bonneville Power Administration (BPAT) | 650.2 GWh | Sep 1952 | Dec 2023 | Water |
| NaturEner Rim Rock Energy | NaturEner Rim Rock Energy LLC | Kevin, MT | NaturEner Wind Watch, LLC (WWA) | 601.5 GWh | Nov 2012 | Aug 2024 | Wind |
| Clearwater Wind East | Clearwater Wind East, LLC | Miles City, MT | NorthWestern Corporation (NWMT) | 486.8 GWh | - | Aug 2024 | Wind |
| Ryan | NorthWestern Energy (MT Hydro) | Great Falls, MT | NorthWestern Corporation (NWMT) | 486.3 GWh | Jul 1915 | Dec 2023 | Water |
| Dave Gates Generating Station | NorthWestern Energy (MT wind/thermal) | Anaconda, MT | NorthWestern Corporation (NWMT) | 483.4 GWh | Dec 2010 | Aug 2024 | Natural Gas : 98.7% Distillate Fuel Oil : 1.3% |
| Yellowstone Energy LP | Yellowstone Energy LP | Billings, MT | NorthWestern Corporation (NWMT) | 447.9 GWh | May 1995 | Aug 2024 | Petroleum Coke : 98.6% Other Gas : 1.4% |
| Hardin Generator Project | Heorot Power Management | Hardin, MT | NorthWestern Corporation (NWMT) | 435.4 GWh | Feb 2006 | Dec 2023 | Subbituminous Coal : 99.0% Natural Gas : 1.0% |
| Judith Gap Wind Energy Center | Invenergy Services LLC | Harlowton, MT | NorthWestern Corporation (NWMT) | 418.4 GWh | Nov 2005 | Aug 2024 | Wind |
| Thompson Falls | NorthWestern Energy (MT Hydro) | Thompson Falls, MT | NorthWestern Corporation (NWMT) | 396.3 GWh | Jun 1915 | Dec 2023 | Water |
| Rainbow (MT) | NorthWestern Energy (MT Hydro) | Great Falls, MT | NorthWestern Corporation (NWMT) | 394.9 GWh | Feb 2013 | Dec 2023 | Water |
| Culbertson Generation Station | Basin Electric Power Coop | Culbertson, MT | Southwest Power Pool (SWPP) | 316.6 GWh | Nov 2010 | Dec 2023 | Natural Gas |
| Colstrip Energy LP | Colstrip Energy LP | Colstrip, MT | NorthWestern Corporation (NWMT) | 306.2 GWh | Jan 1990 | Dec 2023 | Waste/Other Coal : 99.9% |
| Morony | NorthWestern Energy (MT Hydro) | Great Falls, MT | NorthWestern Corporation (NWMT) | 295.0 GWh | Dec 1929 | Dec 2023 | Water |
| Holter | NorthWestern Energy (MT Hydro) | Wolf Creek, MT | NorthWestern Corporation (NWMT) | 281.6 GWh | Jun 1918 | Dec 2023 | Water |
| Canyon Ferry | U S Bureau of Reclamation | Helena, MT | Western Area Power Administration - Upper Great Plains West (WAUW) | 276.5 GWh | Nov 1953 | Dec 2023 | Water |
| Clearwater Wind II | Clearwater Wind II, LLC | Miles City, MT | NorthWestern Corporation (NWMT) | 274.4 GWh | Nov 2023 | Aug 2024 | Wind |
| Stillwater Wind, LLC | Pattern Operators LP | Reed Point, MT | NorthWestern Corporation (NWMT) | 268.8 GWh | Sep 2018 | Aug 2024 | Wind |
| NaturEner Glacier Wind Energy 2 | NaturEner Glacier Wind Energy 2 LLC | Ethridge, MT | NaturEner Power Watch, LLC (GWA) | 258.6 GWh | Oct 2009 | Aug 2024 | Wind |
| South Peak Wind | ALLETE Clean Energy | Geyser, MT | NorthWestern Corporation (NWMT) | 250.2 GWh | Mar 2020 | Aug 2024 | Wind |
| Cochrane | NorthWestern Energy (MT Hydro) | Great Falls, MT | NorthWestern Corporation (NWMT) | 244.7 GWh | Jun 1958 | Dec 2023 | Water |
| NaturEner Glacier Wind Energy 1 | NaturEner Glacier Wind Energy 1 LLC | Ethridge, MT | NaturEner Power Watch, LLC (GWA) | 219.6 GWh | Sep 2008 | Aug 2024 | Wind |
| Basin Creek Plant | Basin Creek Power Services LLC | Butte, MT | NorthWestern Corporation (NWMT) | 179.3 GWh | May 2006 | Aug 2024 | Natural Gas |
| MTSUN | Greenbacker Renewable Energy Corporation | Billings, MT | NorthWestern Corporation (NWMT) | 174.2 GWh | Dec 2022 | Aug 2024 | Solar |
| Apex Solar | Apex Solar LLC | Dillon, MT | NorthWestern Corporation (NWMT) | 151.7 GWh | Jul 2023 | Aug 2024 | Solar |
| OREG 1 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 148.4 GWh | Jun 2006 | Aug 2024 | Waste Heat |
| Hauser | NorthWestern Energy (MT Hydro) | Helena, MT | NorthWestern Corporation (NWMT) | 142.8 GWh | Oct 1911 | Dec 2023 | Water |
| Black Eagle | NorthWestern Energy (MT Hydro) | Great Falls, MT | NorthWestern Corporation (NWMT) | 121.5 GWh | Aug 1927 | Dec 2023 | Water |
| Spion Kop Wind Farm | NorthWestern Energy (MT wind/thermal) | Geyser, MT | NorthWestern Corporation (NWMT) | 112.2 GWh | Nov 2012 | Dec 2023 | Wind |
| OREG 2 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 107.0 GWh | Nov 2008 | Aug 2024 | Waste Heat |
| Greenfield Wind - MT | Greenbacker Renewable Energy Corporation | Fairfield, MT | NorthWestern Corporation (NWMT) | 83.7 GWh | Sep 2016 | Dec 2023 | Wind |
| Diamond Willow Wind Facility | Montana-Dakota Utilities Co | Baker, MT | Midcontinent Independent System Operator, Inc. (MISO) | 82.1 GWh | Nov 2007 | Dec 2023 | Wind |
| Madison Dam | NorthWestern Energy (MT Hydro) | Ennis, MT | NorthWestern Corporation (NWMT) | 69.9 GWh | Aug 1906 | Sep 2023 | Water |
| Big Timber Wind Farm | Consolidated Edison Development Inc. | Big Timber, MT | NorthWestern Corporation (NWMT) | 68.2 GWh | Jan 2018 | Aug 2024 | Wind |
| Gordon Butte Wind LLC | Gordon Butte Wind LLC | Martinsdale, MT | NorthWestern Corporation (NWMT) | 66.5 GWh | Dec 2011 | Dec 2023 | Wind |
| Mystic | NorthWestern Energy (MT Hydro) | Fishtail, MT | NorthWestern Corporation (NWMT) | 62.3 GWh | Apr 1925 | Dec 2023 | Water |
| Tiber Dam Hydroelectric Plant | Tiber Montana LLC | Chester, MT | Western Area Power Administration - Upper Great Plains West (WAUW) | 44.0 GWh | May 2004 | Dec 2023 | Water |
| Broadwater Power Project | Montana Dept-Natural Res&Consv | Toston, MT | NorthWestern Corporation (NWMT) | 39.4 GWh | May 1989 | Dec 2023 | Water |
| Two Dot Wind Farm | NorthWestern Energy (MT wind/thermal) | Two Dot, MT | NorthWestern Corporation (NWMT) | 33.1 GWh | May 2014 | Dec 2023 | Wind |
| Turnbull Hydro | Turnbull Hydro LLC | Fairfield, MT | NorthWestern Corporation (NWMT) | 30.6 GWh | May 2011 | Aug 2023 | Water |
| Horseshoe Bend Wind Park | Cycle Holdings, LLC | Great Falls, MT | NorthWestern Corporation (NWMT) | 29.4 GWh | Jan 2006 | Dec 2023 | Wind |
| Fairfield Wind | Greenbacker Renewable Energy Corporation | Fairfield, MT | NorthWestern Corporation (NWMT) | 25.8 GWh | Apr 2014 | Dec 2023 | Wind |
| Big Fork | PacifiCorp | Big Fork, MT | PacifiCorp East (PACE) | 25.1 GWh | Jun 1910 | Dec 2023 | Water |
| Musselshell Wind Project Two LLC | Musselshell Wind Project Two LLC | Shawmut, MT | NorthWestern Corporation (NWMT) | 23.6 GWh | Nov 2012 | Dec 2023 | Wind |
| Musselshell Wind Project | Musselshell Wind Project LLC | Shawmut, MT | NorthWestern Corporation (NWMT) | 19.3 GWh | Nov 2012 | Dec 2023 | Wind |
| Yellowstone County Generating Station | NorthWestern Energy (MT wind/thermal) | Laurel, MT | NorthWestern Corporation (NWMT) | 18.1 GWh | - | Jul 2024 | Natural Gas |
| Lewis & Clark | Montana-Dakota Utilities Co | Richland, MT | Midcontinent Independent System Operator, Inc. (MISO) | 17.3 GWh | Sep 1958 | Aug 2024 | Natural Gas |
| Stoltze CoGen1 | F H Stoltze Land & Lumber Co | Columbia Falls, MT | Bonneville Power Administration (BPAT) | 16.5 GWh | Sep 2013 | Aug 2024 | Wood/Wood Waste Solids |
| Flint Creek Hydroelectric LLC | Hydrodynamics Inc | Philipsburg, MT | NorthWestern Corporation (NWMT) | 11.0 GWh | Feb 2013 | Dec 2023 | Water |
| Flathead Landfill to Gas Energy Facility | Flathead Electric Coop Inc | Kalispell, MT | Bonneville Power Administration (BPAT) | 7.8 GWh | May 2009 | Dec 2023 | Landfill Gas |
| Great Divide Solar, LLC | Adapture Renewables, Inc. | Canyon Creek, MT | NorthWestern Corporation (NWMT) | 6.2 GWh | Aug 2017 | Aug 2024 | Solar |
| Western Sugar Cooperative - Billings | Western Sugar Cooperative - Billings | Billings, MT | NorthWestern Corporation (NWMT) | 5.8 GWh | Feb 2011 | Dec 2023 | Subbituminous Coal : 90.0% Natural Gas : 10.0% |
| South Mills Solar, LLC | Adapture Renewables, Inc. | Hardin, MT | NorthWestern Corporation (NWMT) | 5.7 GWh | Mar 2017 | Aug 2024 | Solar |
| Magpie Solar, LLC | Adapture Renewables, Inc. | Lavina, MT | NorthWestern Corporation (NWMT) | 5.7 GWh | Aug 2017 | Aug 2024 | Solar |
| Green Meadow Solar, LLC | Adapture Renewables, Inc. | Helena, MT | NorthWestern Corporation (NWMT) | 5.6 GWh | Mar 2017 | Aug 2024 | Solar |
| Black Eagle Solar, LLC | Adapture Renewables, Inc. | Black Eagle, MT | NorthWestern Corporation (NWMT) | 5.1 GWh | Aug 2017 | Aug 2024 | Solar |
| Sidney MT Plant | Sidney Sugars Incorporated | Sidney, MT | NorthWestern Corporation (NWMT) | 4.4 GWh | Aug 1950 | Jan 2023 | Lignite Coal : 52.7% Natural Gas : 47.3% |
| Two Dot Wind Broadview East LLC | Two Dot Wind Broadview East LLC | Broadview, MT | NorthWestern Corporation (NWMT) | 4.2 GWh | Sep 2018 | Dec 2023 | Wind |
| River Bend Solar, LLC | Adapture Renewables, Inc. | Reed Point, MT | NorthWestern Corporation (NWMT) | 3.6 GWh | Mar 2017 | Aug 2024 | Solar |
| South Dry Creek Hydro | Hydrodynamics Inc | Red Lodge, MT | NorthWestern Corporation (NWMT) | 2.9 GWh | Aug 1985 | Nov 2023 | Water |
| Glendive GT | Montana-Dakota Utilities Co | Glendive, MT | Midcontinent Independent System Operator, Inc. (MISO) | 1.5 GWh | May 1979 | Dec 2023 | Natural Gas : 96.1% Distillate Fuel Oil : 3.9% |
| Miles City GT | Montana-Dakota Utilities Co | Miles City, MT | Midcontinent Independent System Operator, Inc. (MISO) | 202.0 MWh | Apr 1972 | Dec 2023 | Natural Gas |
Browse Power Plants By Montana Counties
Figures are based on August 2024 generation numbers.| County | State Rank | Active Plants | Aug 2024 Generation |
|---|---|---|---|
| Rosebud County, MT | # 1 | 5 | 11.1 TWh |
| Cascade County, MT | # 2 | 9 | 1.9 TWh |
| Sanders County, MT | # 3 | 2 | 1.7 TWh |
| Lincoln County, MT | # 4 | 1 | 1.6 TWh |
| Big Horn County, MT | # 5 | 3 | 1.3 TWh |
| Toole County, MT | # 6 | 3 | 1.1 TWh |
| Lake County, MT | # 7 | 1 | 804.8 GWh |
| Carbon County, MT | # 8 | 5 | 706.8 GWh |
| McCone County, MT | # 9 | 2 | 701.2 GWh |
| Flathead County, MT | # 10 | 4 | 699.5 GWh |
| Yellowstone County, MT | # 11 | 8 | 650.1 GWh |
| Roosevelt County, MT | # 12 | 3 | 572.0 GWh |
| Wheatland County, MT | # 13 | 8 | 494.4 GWh |
| Custer County, MT | # 14 | 2 | 487.0 GWh |
| Deer Lodge County, MT | # 15 | 1 | 483.4 GWh |
| Lewis and Clark County, MT | # 16 | 4 | 431.0 GWh |
| County | State Rank | Active Plants | Aug 2024 Generation |
|---|---|---|---|
| Judith Basin County, MT | # 17 | 2 | 362.4 GWh |
| Stillwater County, MT | # 18 | 9 | 334.7 GWh |
| Silver Bow County, MT | # 19 | 1 | 179.3 GWh |
| Beaverhead County, MT | # 20 | 2 | 151.7 GWh |
| Teton County, MT | # 21 | 3 | 140.1 GWh |
| Fallon County, MT | # 22 | 3 | 82.1 GWh |
| Madison County, MT | # 23 | 1 | 69.9 GWh |
| Sweet Grass County, MT | # 24 | 2 | 68.2 GWh |
| Meagher County, MT | # 25 | 1 | 66.5 GWh |
| Liberty County, MT | # 26 | 1 | 44.0 GWh |
| Broadwater County, MT | # 27 | 1 | 39.4 GWh |
| Richland County, MT | # 28 | 2 | 21.6 GWh |
| Granite County, MT | # 29 | 1 | 11.0 GWh |
| Golden Valley County, MT | # 30 | 1 | 5.7 GWh |
| Dawson County, MT | # 31 | 1 | 1.5 GWh |