This is a list of electricity-generating power stations in the U.S. state of Montana, sorted by type and name. In 2023, Montana had a total summer capacity of 7.2 GW through all of its power plants, and a net generation of 26,873 GWh. In 2025, the electrical energy generation mix was 35.2% coal, 34.4% hydroelectric, 21.9% wind, 4.6% natural gas, 1.6% petroleum, 1.2% solar, 0.1% biomass, and 0.9% other. Small-scale solar, including customer-owned photovoltaic panels, delivered and additional 148 GWh to the state's electrical grid in 2025.
During 2019, Montana exported about one-half of the electricity generated by its power plants to other states. Montana has the largest recoverable deposits of coal in the nation, accounting for 30% of U.S. reserves. In recent years three-quarters of the coal mined in Montana has been exported, with over one-third going to Asia via western Canada.
Nuclear power stations Montana had no utility-scale plants that used fissile material as a fuel in 2022.
Fossil-fuel power stations Data from the U.S. Energy Information Administration serves as a general reference.
Coal A useful mapSierra Club-Beyond Coal of coal generation plants is provided by the Sierra Club. Name Location Coordinates Capacity(MW) Yearopened Scheduled Retirement Refs Colstrip Energy LP Plant Rosebud County 38 1990 TBD Colstrip Steam Electric Station Rosebud County 1480 1975 (Unit 1- 340MW)1976 (Unit 2- 340MW)1984 (Unit 3- 740MW)1986 (Unit 4- 740MW) 2020 (Unit 1- closed)2020 (Unit 2- closed)2027 (Unit 3)2027 (Unit 4) Hardin Generator Project Big Horn County 107 2006 TBD Lewis & Clark Station Richland County 53 1958 2021 (closed) Sidney Sugars Plant Richland County 4.0 1950 TBD The Hardin facility was mostly idle and is re-ramping to service cryptocurrency mining.
Natural gas and petroleum Name Location Coordinates Capacity(MW) Fueltype Generationtype Yearopened Refs Basin Creek Generation Plant Silver Bow County 54 Gas Reciprocating engine (x9) 2006 Culbertson Generation Station Roosevelt County 85 Gas Simple cycle 2010 Dave Gates Generating Station Deer Lodge County 150 Gas Simple cycle (x3) 2011 Glendive Gas Turbine Dawson County 75 Gas Simple cycle (x2) 1979/2003 Lewis & Clark 2 Richland County 19 Gas Internal combustion (x2) 2015 Miles City Gas Turbine Custer County 24 Gas Simple cycle 1972 OREG 1 & 2 Roosevelt County 40 Waste heat from gas compressor turbine ORC generator (x8) 2006/2009 Phillips 66 Billings Refinery Yellowstone County 1.5 Petroleum gases Steam turbine 2007 Yellowstone Energy Yellowstone County 52 Petroleum Steam turbine 1995 Formerly Mill Creek Generating Station
Renewable power stations Data from the U.S. Energy Information Administration serves as a general reference.
Biomass Name Location Coordinates Capacity(MW) Fuel Generationtype Yearopened Refs Stoltze CoGen1 Flathead County 3.0 Wood/wood waste Steam turbine 2013
Hydroelectric
Additional Montana hydroelectric general references: Name Location Coordinates Capacity(MW) Number ofturbines Yearopened RefsBigfork HydroFlathead4.531908 Black Eagle Hydro Cascade County 21 3 1927 Broadwater Power Project Broadwater County 9.7 1 1989 Canyon Ferry Powerplant Lewis and Clark County 57.6 3 1953-1954 Cochrane Hydro Cascade County 62 2 1958 Flint Creek Hydro Granite County 2.0 1 2013 Fort Peck Hydropower Plant McCone County 218 5 1943/1948/1951/1961 Hauser Hydro Lewis and Clark County 18.2 6 1911 Holter Hydro Cascade County 53.2 4 1918 Hungry Horse Powerplant Flathead County 427 4 1952-1953 Libby Hydro Plant Lincoln County 525 5 1975-1976/1984 Madison Hydro Madison County 8.0 4 1906/1908 Morony Hydro Cascade County 49 2 1930 Mystic Lake Hydro Stillwater County 12 2 1925 Noxon Rapids Hydro Sanders County 580 5 1959-1960/1977 Rainbow Hydro Cascade County 64 1 2013 Ryan Hydro Cascade County 69.5 6 1915-1916 Seli's Ksanka Qlispe' Hydro(formerly Kerr Dam Hydro) Lake County 206 3 1938/1949/1954 South Dry Creek Hydro Carbon County 2.0 1 1985 Thompson Falls Hydro Sanders County 94 7 1915-1917 Tiber Dam Hydro Liberty County 7.5 1 2004 Turnbull Hydro Teton County 13 2 2011 Yellowtail Powerplant Big Horn County 278 4 1966
Wind
Name Location Coordinates Capacity(MW) Number ofturbines Yearopened Turbinemfg spec Refs Big Timber Wind Farm (Greycliff) Sweet Grass County 25 14 2018 GE 1.8MW Diamond Willow Wind Facility Fallon County 30 20 2008 GE 1.5MW Fairfield Wind Teton County 10 6 2014 GE 1.6/1.7MW Glacier Wind I&II Glacier CountyToole County 210 140 2008 Acciona 1.5MW Gordon Butte Wind Meagher County 17.7 9 20122018 GE 1.6MWGE 2.7MW Greenfield Wind Teton County 25 13 2016 GE 2.3MW Horseshoe Bend Wind Park Cascade County 9.0 6 2006 GE 1.5MW Judith Gap Wind Energy Center Wheatland County 135 90 2006 GE 1.5MW Musselshell Wind Project I&II Wheatland County 20 14 2013 GE 1.5MW Pryor Mountain Wind Project Carbon County 240 114 2020 Vestas 2.0/2.2MWGE 2.3MW Rim Rock Wind Farm Glacier CountyToole County 189 126 2012 Acciona 1.5MW South Peak Wind Judith Basin County 80 29 2020 GE 2.3/2.5MW Spion Kop Wind Farm Judith Basin County 40 25 2013 GE 1.6MW Stillwater Wind Stillwater County 80 31 2018 Siemens-Gamesa 2.3/2.6MW Two Dot Wind Farm Wheatland County 9.7 6 2014 GE 1.6MW Formerly Mud Springs Wind
Solar
Project nameLocationCoordinatesCapacity(MWAC)YearopenedRefsBlack Eagle Solar Cascade County 3.0 2017 Great Divide Solar Lewis and Clark County 3.0 2017 Green Meadow Solar Lewis and Clark County 3.0 2017 Magpie Solar Golden Valley County 3.0 2017 River Bend Solar Stillwater County 2.0 2017 South Mills Solar Big Horn County 3.0 2017
Storage power stations Montana had no utility-scale storage power stations in 2019. A proposed facility is the 400MW/1300MWh Gordon Butte Pumped Storage Project.
References