List of power stations in Montana


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 6,698 MW through all of its power plants, and a net generation of 26,895 GWh. In 2024, the electrical energy generation mix was 37% coal, 32.7% hydroelectric, 22.2% wind, 4.2% natural gas, 1.5% petroleum, 1.4% solar, 0.1% biomass, and 1% other. Small-scale solar, including customer-owned photovoltaic panels, delivered and additional 107 GWh to the state's electrical grid in 2024.
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 map of coal generation plants is provided by the Sierra Club.
NameLocationCoordinatesCapacity
Year
opened		Scheduled RetirementRefs
Colstrip Energy LP PlantRosebud County381990TBD
Colstrip Steam Electric StationRosebud County14801975
1976
1984
1986 		2020
2020
2027
2027
Hardin Generator ProjectBig Horn County1072006TBD
Lewis & Clark StationRichland County5319582021
Sidney Sugars PlantRichland County4.01950TBD

The Hardin facility was mostly idle and is re-ramping to service cryptocurrency mining.

Natural gas and petroleum

Formerly Mill Creek Generating Station

Renewable power stations

Data from the U.S. Energy Information Administration serves as a general reference.

Hydroelectric

Additional Montana hydroelectric general references:
NameLocationCoordinatesCapacity
Number of
turbines		Year
opened		Refs
Bigfork HydroFlathead4.531908
Black Eagle HydroCascade County2131927
Broadwater Power ProjectBroadwater County9.711989
Canyon Ferry PowerplantLewis and Clark County57.631953-1954
Cochrane HydroCascade County6221958
Flint Creek HydroGranite County2.012013
Fort Peck Hydropower PlantMcCone County21851943/1948/
1951/1961
Hauser HydroLewis and Clark County18.261911
Holter HydroCascade County53.241918
Hungry Horse PowerplantFlathead County42741952-1953
Libby Hydro PlantLincoln County52551975-1976/
1984
Madison HydroMadison County8.041906/1908
Morony HydroCascade County4921930
Mystic Lake HydroStillwater County1221925
Noxon Rapids HydroSanders County58051959-1960/
1977
Rainbow HydroCascade County6412013
Ryan HydroCascade County69.561915-1916
Seli's Ksanka Qlispe' Hydro
Lake County20631938/1949/
1954
South Dry Creek HydroCarbon County2.011985
Thompson Falls HydroSanders County9471915-1917
Tiber Dam HydroLiberty County7.512004
Turnbull HydroTeton County1322011
Yellowtail PowerplantBig Horn County27841966

Wind

NameLocationCoordinatesCapacity
Number of
turbines		Year
opened		Turbine
mfg spec		Refs
Big Timber Wind Farm Sweet Grass County25142018GE 1.8MW
Diamond Willow Wind FacilityFallon County30202008GE 1.5MW
Fairfield WindTeton County1062014GE 1.6/1.7MW
Glacier Wind I&IIGlacier County
Toole County		2101402008Acciona 1.5MW
Gordon Butte WindMeagher County17.792012
2018		GE 1.6MW
GE 2.7MW
Greenfield WindTeton County25132016GE 2.3MW
Horseshoe Bend Wind ParkCascade County9.062006GE 1.5MW
Judith Gap Wind Energy CenterWheatland County135902006GE 1.5MW
Musselshell Wind Project I&IIWheatland County20142013GE 1.5MW
Pryor Mountain Wind ProjectCarbon County2401142020Vestas 2.0/2.2MW
GE 2.3MW
Rim Rock Wind FarmGlacier County
Toole County		1891262012Acciona 1.5MW
South Peak WindJudith Basin County80292020GE 2.3/2.5MW
Spion Kop Wind FarmJudith Basin County40252013GE 1.6MW
Stillwater WindStillwater County80312018Siemens-Gamesa 2.3/2.6MW
Two Dot Wind FarmWheatland County9.762014GE 1.6MW

Formerly Mud Springs Wind

Solar

Project nameLocationCoordinatesCapacity
Year
opened		Refs
Black Eagle SolarCascade County3.02017
Great Divide SolarLewis and Clark County3.02017
Green Meadow SolarLewis and Clark County3.02017
Magpie SolarGolden Valley County3.02017
River Bend SolarStillwater County2.02017
South Mills SolarBig Horn County3.02017

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.