Pumped storage plants in the USA

Conventional hydro, pumped storage and hydrokinetic plants in the United States. Click a state to drill down, or search near a place.

Operating39plants

Operating capacity22.2 GWnameplate

Under construction0.0 MW0 plants

Whole pipeline2,600 MWplanned, approved and building

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Data: U.S. Energy Information Administration, Form EIA-860M (September 2026). Generators of 1 MW and over. Capacity is nameplate, not output.

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Plants

42 plants

Plant	Capacity	Stage	State	Owner / operator	Year
Bath County	2,862 MW	Operating	VA Bath	Virginia Electric & Power Co	1985
Ludington	1,979 MW	Operating	MI Mason	Consumers Energy Co - (MI)	1973
Raccoon Mountain	1,714 MW	Operating	TN Hamilton	Tennessee Valley Authority	1978
Bad Creek	1,680 MW	Operating	SC Oconee	Duke Energy Carolinas, LLC	1991
Castaic	1,626 MW	Operating	CA Los Angeles	Los Angeles Department of Water & Power	1973
Northfield Mountain	1,168 MW	Operating	MA Franklin	FirstLight Power Resources, Inc. - MA	1972
Muddy Run	1,072 MW	Operating	PA Lancaster	Constellation Power, Inc	1967
Helms Pumped Storage	1,053 MW	Operating	CA Fresno	Pacific Gas & Electric Co.	1984
Blenheim Gilboa	1,000 MW	Operating	NY Schoharie	New York Power Authority	1973
Haiwee Pumped Storage Project	1,000 MW	In planning	CA Inyo	Premium Energy Holdings	2028
Intermountain Pumped Storage Project	1,000 MW	In planning	UT Millard	Premium Energy Holdings	2028
Rocky Mountain Hydroelectric Plant	848 MW	Operating	GA Floyd	Oglethorpe Power Corporation	1995
Jocassee	774 MW	Operating	SC Pickens	Duke Energy Carolinas, LLC	1973
Bear Swamp	666 MW	Operating	MA Berkshire	Bear Swamp Power Company LLC	1974
Whale Rock Pumped Storage Hydro Project	600 MW	In planning	CA San Luis Obispo	Premium Energy Holdings	2027
Fairfield Pumped Storage	587 MW	Operating	SC Fairfield	Dominion Energy South Carolina, Inc	1978
Yards Creek Energy	453 MW	Operating	NJ Warren	Yards Creek Energy	1965
W R Gianelli	424 MW	Operating	CA Merced	California Dept. of Water Resources	1967
Seneca Generation LLC	412 MW	Operating	PA Warren	Seneca Generation LLC	1970
Taum Sauk	408 MW	Operating	MO Reynolds	Union Electric Co - (MO)	1963
Richard B Russell	328 MW	Operating	GA Elbert	USCE-Savannah District	2002
Grand Coulee	314 MW	Operating	WA Grant	U S Bureau of Reclamation	1973
Cabin Creek	300 MW	Operating	CO Clear Creek	Public Service Co of Colorado	1967
Edward C Hyatt	293 MW	Operating	CA Butte	California Dept. of Water Resources	1968
Salina	259 MW	Operating	OK Mayes	Grand River Dam Authority	1968
Carters	250 MW	Operating	GA Murray	USCE-Mobile District	1977
Smith Mountain	247 MW	Operating	VA Pittsylvania	Appalachian Power Co	1965
Lewiston Niagara	240 MW	Operating	NY Niagara	New York Power Authority	1961
Wallace Dam	209 MW	Operating	GA Hancock	Georgia Power Co	1979
Mount Elbert	200 MW	Operating	CO Lake	U S Bureau of Reclamation	1981
J S Eastwood	200 MW	Operating	CA Fresno	Southern California Edison Co	1987
Harry Truman	161 MW	Operating	MO Benton	USCE-Kansas City District	1979
Horse Mesa	99.8 MW	Operating	AZ Maricopa	Salt River Project	1927
Hiwassee Dam	95.0 MW	Operating	NC Cherokee	Tennessee Valley Authority	1956
Thermalito	82.5 MW	Operating	CA Butte	California Dept. of Water Resources	1968
Mormon Flat	54.3 MW	Operating	AZ Maricopa	Salt River Project	1971
Waddell	40.0 MW	Operating	AZ Maricopa	Central Arizona Water Conservation Dist	1993
Clarence Cannon	31.0 MW	Operating	MO Ralls	USCE-St Louis District	1984
Rocky River (CT)	31.0 MW	Operating	CT Litchfield	FirstLight Power Resources Services LLC	1928
Degray	30.0 MW	Operating	AR Clark	USCE -Vickburg District	1972
ONeill	25.2 MW	Operating	CA Merced	U S Bureau of Reclamation	1967
Flatiron	8.5 MW	Operating	CO Larimer	U S Bureau of Reclamation	1954

Operating capacity by state

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Largest owners and operators

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Source: U.S. Energy Information Administration, Form EIA-860M, Monthly Update to the Annual Electric Generator Report, September 2026. Includes generators of 1 MW and over at plants connected to the grid. Planned dates are developers' targets reported to EIA and often move. US EV charging map