◆The Orbit Desk
Discuss →

Hydroelectric power plants in the United States

1,417 hydroelectric power plants across 50 states — capacity, location, and planned additions, from EIA data.

Development pipeline — planned & under construction

Loading map…
Planned pipeline — new additions by fuel type

Top states by capacity — capacity · plants

Washington23 GW · 81
California16 GW · 262
Oregon8.5 GW · 69
New York5.9 GW · 170
South Carolina4.3 GW · 33
Tennessee4.2 GW · 29
Virginia3.9 GW · 24
Georgia3.7 GW · 33
Alabama3.3 GW · 24
Arizona2.9 GW · 13

All states

California26215.5 GWNew York1705.9 GWWashington8123 GWIdaho782.7 GWOregon698.5 GWWisconsin58517 MWMaine57738 MWMichigan572.3 GWColorado501.2 GWVermont42320 MWNorth Carolina402 GWMassachusetts332.1 GWSouth Carolina334.3 GWGeorgia333.7 GWAlaska32520 MWPennsylvania322.6 GWNew Hampshire32488 MWUtah311.3 GWTennessee294.2 GWTexas27762 MWMontana242.8 GWAlabama243.3 GWVirginia243.9 GWMinnesota22218 MWArkansas201.4 GWWest Virginia17460 MWWyoming16303 MWConnecticut15150 MWKentucky141.1 GWArizona132.9 GWOklahoma111.1 GWNebraska10332 MWIllinois1057 MWHawaii842 MWMissouri81.1 GWPuerto Rico798 MWNevada61.1 GWOhio6150 MWIndiana6108 MWIowa5187 MWSouth Dakota41.6 GWNew Mexico482 MWMississippi435 MWRhode Island46 MWNew Jersey3468 MWFlorida276 MWMaryland2551 MWLouisiana2241 MWNorth Dakota1583 MWKansas17 MW

Largest next additions — planned & under construction

Haiwee Pumped Storage Project
Hydroelectric · Olancha, California · Planned · exp. 2028
1,000 MW
Intermountain Pumped Storage Project
Hydroelectric · Delta, Utah · Planned · exp. 2028
1,000 MW
Whale Rock Pumped Storage Hydro Project
Hydroelectric · Cayucos, California · Planned · exp. 2027
600 MW
Overton Hydroelectric Project
Hydroelectric · Alexandria, Louisiana · Planned · exp. 2028
49 MW
Tygart Hydropower
Hydroelectric · Grafton, West Virginia · Under construction · exp. 2027
30 MW
R.C. Byrd L&D Hydroelectric Project
Hydroelectric · West Virginia · Under construction · exp. 2029
29 MW
Colonel Charles D. Maynard Project
Hydroelectric · Arkansas · Under construction · exp. 2031
26 MW
Montgomery L&D Hydroelectric Project
Hydroelectric · Monaca, Pennsylvania · Planned · exp. 2028
20 MW
Emsworth L&D Hydroelectric Project
Hydroelectric · Pittsburgh, Pennsylvania · Planned · exp. 2030
20 MW
Pike Island Hydroelectric Project
Hydroelectric · Ohio · Under construction · exp. 2029
20 MW

Largest hydroelectric plants

Grand Coulee
Hydroelectric · Grand Coulee, Washington · Operating · COD 1941
6,809 MW
Bath County
Hydroelectric · Warm Springs, Virginia · Operating · COD 1985
2,862 MW
Chief Joseph
Hydroelectric · Bridgeport, Washington · Operating · COD 1955
2,456 MW
Robert Moses Niagara
Hydroelectric · Lewiston, New York · Operating · COD 1961
2,429 MW
Wanapum
Hydroelectric · Beverly, Washington · Operating · COD 2011
2,258 MW
John Day
Hydroelectric · Rufus, Oregon · Operating · COD 1968
2,160 MW
Ludington
Hydroelectric · Ludington, Michigan · Operating · COD 1973
1,979 MW
The Dalles
Hydroelectric · The Dalles, Oregon · Operating · COD 1957
1,820 MW
Raccoon Mountain
Hydroelectric · Chattanooga, Tennessee · Operating · COD 1978
1,714 MW
Castaic
Hydroelectric · Castaic, California · Operating · COD 1972
1,682 MW
Bad Creek
Hydroelectric · Salem, South Carolina · Operating · COD 1991
1,680 MW
Rocky Reach
Hydroelectric · Wenatchee, Washington · Operating · COD 1961
1,349 MW
Glen Canyon Dam
Hydroelectric · Page, Arizona · Operating · COD 1964
1,312 MW
Northfield Mountain
Hydroelectric · Northfield, Massachusetts · Operating · COD 1972
1,168 MW
Bonneville
Hydroelectric · Cascade Locks, Oregon · Operating · COD 1938
1,162 MW
Boundary
Hydroelectric · Metaline, Washington · Operating · COD 1967
1,160 MW
Muddy Run
Hydroelectric · Drumore, Pennsylvania · Operating · COD 1967
1,072 MW
Helms Pumped Storage
Hydroelectric · Shaver Lake, California · Operating · COD 1984
1,053 MW
Hoover Dam (NV)
Hydroelectric · Boulder City, Nevada · Operating · COD 1936
1,039 MW
Hoover Dam (AZ)
Hydroelectric · Boulder City, Arizona · Operating · COD 1936
1,039 MW
Blenheim Gilboa
Hydroelectric · Gilboa, New York · Operating · COD 1973
1,000 MW
McNary
Hydroelectric · Umatilla, Oregon · Operating · COD 1953
991 MW
Priest Rapids
Hydroelectric · Mattawa, Washington · Operating · COD 1959
950 MW
Robert Moses Power Dam
Hydroelectric · Massena, New York · Operating · COD 1958
912 MW
Wells
Hydroelectric · Chelan, Washington · Operating · COD 1967
867 MW

Source: U.S. Energy Information Administration (EIA-860M)