Conventional hydro 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.

Operating1,387plants

Operating capacity78.9 GWnameplate

Under construction17.5 MW3 plants

Whole pipeline431 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

1,419 plants · page 1 of 29

Plant	Capacity	Stage	State	Owner / operator	Year
Grand Coulee	6,495 MW	Operating	WA Grant	U S Bureau of Reclamation	1941
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
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
Bonneville	1,162 MW	Operating	OR Multnomah	USACE Northwestern Division	1938
Boundary	1,160 MW	Operating	WA Pend Oreille	City of Seattle - (WA)	1967
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
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
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
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
Ice Harbor	603 MW	Operating	WA Walla Walla	USACE Northwestern Division	1962
Garrison	583 MW	Operating	ND Mercer	USACE-Omaha	1956
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
Noxon Rapids	488 MW	Operating	MT Sanders	Avista Corp	1959
Dworshak	465 MW	Operating	ID Clearwater	USACE Northwestern Division	1974
Ross	450 MW	Operating	WA Whatcom	City of Seattle - (WA)	1952
Hungry Horse	428 MW	Operating	MT Flathead	U S Bureau of Reclamation	1952
Hartwell Lake	420 MW	Operating	GA Hart	USCE-Savannah District	1962
Safe Harbor	418 MW	Operating	PA Lancaster	Safe Harbor	1931
Hells Canyon	411 MW	Operating	OR Wallowa	Idaho Power Co	1967
Wheeler Dam	404 MW	Operating	AL Lawrence	Tennessee Valley Authority	1936
Round Butte	373 MW	Operating	OR Jefferson	Portland General Electric Co	1964
J Strom Thurmond	362 MW	Operating	SC McCormick	USCE-Savannah District	1953
Edward C Hyatt	351 MW	Operating	CA Butte	California Dept. of Water Resources	1968
Cowans Ford	350 MW	Operating	NC Lincoln	Duke Energy Carolinas, LLC	1963
Bull Shoals	340 MW	Operating	AR Marion	USCE-Little Rock District	1952
Fort Randall	320 MW	Operating	SD Charles Mix	USACE-Omaha	1954
Colgate	315 MW	Operating	CA Yuba	Yuba County Water Agency - (CA)	1969
Smith Mountain	300 MW	Operating	VA Pittsylvania	Appalachian Power Co	1965
Mossyrock	300 MW	Operating	WA Lewis	City of Tacoma - (WA)	1968
New Melones	300 MW	Operating	CA Tuolumne	U S Bureau of Reclamation	1979
Richard B Russell	300 MW	Operating	GA Elbert	USCE-Savannah District	1985
John H Kerr	297 MW	Operating	VA Mecklenburg	USCE-Wilmington District	1952
Yellowtail	278 MW	Operating	MT Big Horn	U S Bureau of Reclamation	1966

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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