♨ Geothermal Power Plants

Geothermal plants tap heat from underground reservoirs to spin steam turbines. They provide carbon-free baseload power with very high capacity factors, but they only work where hot rock is accessible — primarily in the western U.S.

Plants85operating
Capacity4,149 MWnameplate
Generation16.5M MWhannual

Largest sites

PlantStateCapacityOperator
Geysers Unit 5-20California1,163 MWGeysers Power Co Llc
Calistoga Power PlantCalifornia176 MWGeysers Power Co Llc
Heber GeothermalCalifornia151 MWOrcal Geothermal, Inc
Mcginness HillsNevada116 MWOrmat Nevada Inc
Geothermal 1California110 MWNorthern California Power Agny
Geothermal 2California110 MWNorthern California Power Agny
Mcginness Hills 3Nevada98.8 MWOrmat Nevada Inc
Coso Finance PartnersCalifornia92.2 MWCoso Operating Co Llc
Coso Power DevelopersCalifornia90.0 MWCoso Operating Co Llc
Coso Energy DevelopersCalifornia90.0 MWCoso Operating Co Llc
North Brawley Geothermal PlantCalifornia80.0 MWOrmat Nevada Inc
Sonoma California GeothermalCalifornia78.0 MWGeysers Power Co Llc
Tungsten MountainNevada74.8 MWTungsten Mountain
Second Imperial GeothermalCalifornia74.5 MWOrcal Geothermal, Inc
Dixie ValleyNevada70.9 MWOrmat Nevada Inc
Stillwater FacilityNevada69.2 MWOrmat Stillwater Llc
Ngp Blue Mountain I LlcNevada63.9 MWNgp Blue Mountain I Llc
Patua Acquisition Project, LlcNevada58.6 MWPatua Acquisition Company, Llc
Salton Sea Power Llc - Unit 5California58.3 MWCalenergy Operating Corporation
Bottle Rock PowerCalifornia55.0 MWMayacma Geothermal
John L. Featherstone PlantCalifornia55.0 MWHudson Ranch Power I Llc
Salton Sea Power Gen Co - Unit 3California53.9 MWCalenergy Operating Corporation
Puna Geothermal Venture IHawaii51.0 MWPuna Geothermal Venture
Salton Sea Power Gen Co - Unit 4California47.5 MWCalenergy Operating Corporation
Ormesa IiiCalifornia45.6 MWOrmat Nevada Inc
Ce LeathersCalifornia45.5 MWCalenergy Operating Corporation
Del Ranch CompanyCalifornia45.5 MWCalenergy Operating Corporation
Elmore CompanyCalifornia45.5 MWCalenergy Operating Corporation
Cd4California44.4 MWCd4
Vulcan-Bn Geothermal Power CompanyCalifornia39.6 MWCalenergy Operating Corporation
BlundellUtah38.1 MWPacificorp
North ValleyNevada37.0 MWNorth Valley
Steamboat Hills LpNevada33.6 MWOrmat Nevada Inc
Neal Hot Springs Geothermal ProjectOregon33.0 MWUs Geothermal Inc.
Tuscarora Geothermal Power PlantNevada32.0 MWOrmat Nevada Inc
Richard Burdette GeothermalNevada30.0 MWOrmat Nevada Inc
Galena 3 Geothermal Power PlantNevada30.0 MWOrmat Nevada Inc
BradyNevada29.5 MWOrmat Nevada Inc
Ormesa ICalifornia26.4 MWOrmat Nevada Inc
Desert Peak Power PlantNevada26.0 MWOrmat Nevada Inc
Soda Lake 3Nevada26.0 MWAmor Ix, Llc
Aidlin Geothermal Power PlantCalifornia25.0 MWGeysers Power Co Llc
Cove FortUtah25.0 MWOrmat Cove Fort Llc
Don A Campbell 2 GeothermalNevada25.0 MWOrni 37 Llc
Ormesa IiCalifornia24.0 MWOrmat Nevada Inc
Steamboat IiNevada23.7 MWSteamboat Development Corp
Steamboat IiiNevada23.7 MWSteamboat Development Corp
Salt WellsNevada23.6 MWOrmat Salt Wells Llc
Jersey Valley Geothermal Power PlantNevada23.5 MWOrmat Nevada Inc
Don A Campbell 1 GeothermalNevada22.5 MWOrni 47, Llc
Star Peak Geothermal PlantNevada21.9 MWStar Peak Geothermal Llc.
Geo East Mesa IiCalifornia21.6 MWOrmat Nevada Inc
BeowaweNevada20.6 MWOrmat Nevada Inc
Salton Sea Power Gen Co - Unit 2California20.0 MWCalenergy Operating Corporation
Lightning Dock GeothermalNew Mexico19.2 MWLightning Dock Geothermal Hi-01, Llc
Raft River Geothermal Power PlantIdaho18.0 MWUs Geothermal Inc.
Galena 2 Geothermal Power PlantNevada16.5 MWOrmat Nevada Inc
Mammoth G3California15.0 MWOrmat Nevada Inc
Mammoth G2California15.0 MWOrmat Nevada Inc
Thermo No 1Utah14.0 MWThermo No 1 Be 01 Llc
San EmidioNevada11.8 MWUsg Nevada Llc
Ce Turbo LlcCalifornia11.5 MWCalenergy Operating Corporation
Mammoth G1California10.0 MWOrmat Nevada Inc
Salton Sea Power Gen Co - Unit 1California10.0 MWCalenergy Operating Corporation
Whitegrass No. 1Nevada6.4 MWOpen Mountain Energy Llc.
Paisley Geothermal Generating PlantOregon3.7 MWSurprise Valley Electrification
Amedee Geothermal Venture ICalifornia3.0 MWHays Ranches, Llc
West Ford Flat Power PlantCalifornia— MWGeysers Power Co Llc
Bear Canyon Power PlantCalifornia— MWGeysers Power Co Llc
EmpireNevada— MWUsg Nevada Llc
Ormesa IhCalifornia— MWOrmat Nevada Inc
Steamboat 1Nevada— MWOrmat Nevada Inc
Ormesa IeCalifornia— MWOrmat Nevada Inc
Steamboat 1a Power PlantNevada— MWOrmat Nevada Inc
Four Mile HillCalifornia— MWCalpine Corporation
Telephone FlatCalifornia— MWCalpine Corporation
Buckeye Geothermal Power PlantCalifornia— MWCalpine Corporation
Wild Horse Power PlantCalifornia— MWCalpine Corporation
Black Rock ICalifornia— MWCe Obsidian Energy Llc
Black Rock IiCalifornia— MWCe Obsidian Energy Llc
Black Rock IiiCalifornia— MWCe Obsidian Energy Llc
Hudson Ranch Power Ii LlcCalifornia— MWHudson Ranch Power I Llc
Fish Lake GeothermalNevada— MWFish Lake Geothermal Llc
Rodatherm Milford 1Utah— MWRodatherm Energy Corporation
Cape Generating StationUtah— MWCape Holdco Llc