Hydroelectric 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.

Operating1,411plants

Operating capacity101.1 GWnameplate

Under construction17.5 MW3 plants

Whole pipeline3,031 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

1,446 plants · page 1 of 29

Plant	Capacity	Stage	State	Owner / operator	Year
Grand Coulee	6,809 MW	Operating	WA Grant	U S Bureau of Reclamation	1941
Bath County	2,862 MW	Operating	VA Bath	Virginia Electric & Power Co	1985
Robert Moses Niagara	2,429 MW	Operating	NY Niagara	New York Power Authority	1961
Chief Joseph	2,280 MW	Operating	WA Douglas	USACE Northwestern Division	1955
John Day	2,025 MW	Operating	OR Sherman	USACE Northwestern Division	1968
Ludington	1,979 MW	Operating	MI Mason	Consumers Energy Co - (MI)	1973
Raccoon Mountain	1,714 MW	Operating	TN Hamilton	Tennessee Valley Authority	1978
Castaic	1,682 MW	Operating	CA Los Angeles	Los Angeles Department of Water & Power	1972
Bad Creek	1,680 MW	Operating	SC Oconee	Duke Energy Carolinas, LLC	1991
The Dalles	1,648 MW	Operating	OR Wasco	USACE Northwestern Division	1957
Rocky Reach	1,349 MW	Operating	WA Chelan	PUD No 1 of Chelan County - (WA)	1961
Glen Canyon Dam	1,312 MW	Operating	AZ Coconino	U S Bureau of Reclamation	1964
Wanapum	1,220 MW	Operating	WA Grant	PUD No 2 of Grant County - (WA)	2011
Northfield Mountain	1,168 MW	Operating	MA Franklin	FirstLight Power Resources, Inc. - MA	1972
Bonneville	1,162 MW	Operating	OR Multnomah	USACE Northwestern Division	1938
Boundary	1,160 MW	Operating	WA Pend Oreille	City of Seattle - (WA)	1967
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
Hoover Dam (AZ)	1,039 MW	Operating	AZ Mohave	U S Bureau of Reclamation	1936
Hoover Dam (NV)	1,039 MW	Operating	NV Clark	U S Bureau of Reclamation	1936
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
McNary	991 MW	Operating	OR Umatilla	USACE Northwestern Division	1953
Priest Rapids	950 MW	Operating	WA Grant	PUD No 2 of Grant County - (WA)	1959
Robert Moses Power Dam	912 MW	Operating	NY St Lawrence	New York Power Authority	1958
Rocky Mountain Hydroelectric Plant	848 MW	Operating	GA Floyd	Oglethorpe Power Corporation	1995
Little Goose	810 MW	Operating	WA Columbia	USACE Northwestern Division	1970
Lower Granite	810 MW	Operating	WA Whitman	USACE Northwestern Division	1975
Lower Monumental	810 MW	Operating	WA Walla Walla	USACE Northwestern Division	1969
Wells	789 MW	Operating	WA Chelan	PUD No 1 of Douglas County - (WA)	1967
Oahe	786 MW	Operating	SD Hughes	USACE-Omaha	1962
Jocassee	774 MW	Operating	SC Pickens	Duke Energy Carolinas, LLC	1973
Shasta	714 MW	Operating	CA Shasta	U S Bureau of Reclamation	1944
Brownlee	675 MW	Operating	ID Washington	Idaho Power Co	1958
Wilson Dam	667 MW	Operating	AL Lauderdale	Tennessee Valley Authority	1925
Bear Swamp	666 MW	Operating	MA Berkshire	Bear Swamp Power Company LLC	1974
Edward C Hyatt	644 MW	Operating	CA Butte	California Dept. of Water Resources	1968
Richard B Russell	628 MW	Operating	GA Elbert	USCE-Savannah District	1985
Ice Harbor	603 MW	Operating	WA Walla Walla	USACE Northwestern Division	1962
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
Garrison	583 MW	Operating	ND Mercer	USACE-Omaha	1956
Smith Mountain	548 MW	Operating	VA Pittsylvania	Appalachian Power Co	1965
Big Bend Dam	538 MW	Operating	SD Buffalo	USACE-Omaha	1964
Conowingo	531 MW	Operating	MD Harford	Constellation Power, Inc	1928
Libby	525 MW	Operating	MT Lincoln	USACE Northwestern Division	1975
Rock Island	514 MW	Operating	WA Chelan	PUD No 1 of Chelan County - (WA)	1931
Carters	500 MW	Operating	GA Murray	USCE-Mobile District	1975
Noxon Rapids	488 MW	Operating	MT Sanders	Avista Corp	1959

Operating capacity by state

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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