💧 Hydroelectric Power Plants

Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.

Largest sites

Plant	State	Capacity	Operator
Grand Coulee	Washington	6,809 MW	U S Bureau Of Reclamation
Bath County	Virginia	2,862 MW	Virginia Electric & Power Co
Chief Joseph	Washington	2,456 MW	Usace Northwestern Division
Robert Moses Niagara	New York	2,429 MW	New York Power Authority
John Day	Oregon	2,160 MW	Usace Northwestern Division
Ludington	Michigan	1,979 MW	Consumers Energy Co - (Mi)
The Dalles	Oregon	1,820 MW	Usace Northwestern Division
Raccoon Mountain	Tennessee	1,714 MW	Tennessee Valley Authority
Castaic	California	1,682 MW	Los Angeles Department Of Water & Power
Bad Creek	South Carolina	1,584 MW	Duke Energy Carolinas, Llc
Glen Canyon Dam	Arizona	1,312 MW	U S Bureau Of Reclamation
Rocky Reach	Washington	1,300 MW	Pud No 1 Of Chelan County
Wanapum	Washington	1,220 MW	Pud No 2 Of Grant County
Northfield Mountain	Massachusetts	1,168 MW	Firstlight Power Resources, Inc. - Ma
Bonneville	Oregon	1,162 MW	Usace Northwestern Division
Boundary	Washington	1,119 MW	City Of Seattle - (Wa)
Muddy Run	Pennsylvania	1,072 MW	Constellation Power, Inc
Helms Pumped Storage	California	1,053 MW	Pacific Gas & Electric Co.
Hoover Dam (Nv)	Nevada	1,039 MW	U S Bureau Of Reclamation
Hoover Dam (Az)	Arizona	1,039 MW	U S Bureau Of Reclamation
Blenheim Gilboa	New York	1,000 MW	New York Power Authority
Mcnary	Oregon	991 MW	Usace Northwestern Division
Priest Rapids	Washington	950 MW	Pud No 2 Of Grant County
Robert Moses Power Dam	New York	912 MW	New York Power Authority
Rocky Mountain Hydroelectric Plant	Georgia	848 MW	Oglethorpe Power Corporation
Little Goose	Washington	810 MW	Usace Northwestern Division
Lower Monumental	Washington	810 MW	Usace Northwestern Division
Lower Granite	Washington	810 MW	Usace Northwestern Division
Oahe	South Dakota	786 MW	Usace-Omaha
Jocassee	South Carolina	774 MW	Duke Energy Carolinas, Llc
Wells	Washington	774 MW	Pud No 1 Of Douglas County
Shasta	California	714 MW	U S Bureau Of Reclamation
Brownlee	Idaho	675 MW	Idaho Power Co
Wilson Dam	Alabama	667 MW	Tennessee Valley Authority
Bear Swamp	Massachusetts	666 MW	Bear Swamp Power Company Llc
Edward C Hyatt	California	644 MW	California Dept. Of Water Resources
Rock Island	Washington	629 MW	Pud No 1 Of Chelan County
Richard B Russell	Georgia	628 MW	Usce-Savannah District
Ice Harbor	Washington	603 MW	Usace Northwestern Division
Fairfield Pumped Storage	South Carolina	587 MW	Dominion Energy South Carolina, Inc
Garrison	North Dakota	583 MW	Usace-Omaha
Smith Mountain	Virginia	548 MW	Appalachian Power Co
Big Bend Dam	South Dakota	538 MW	Usace-Omaha
Conowingo	Maryland	531 MW	Constellation Power, Inc
Libby	Montana	525 MW	Usace Northwestern Division
Carters	Georgia	500 MW	Usce-Mobile District
Noxon Rapids	Montana	488 MW	Avista Corp
Dworshak	Idaho	465 MW	Usace Northwestern Division
Yards Creek Energy	New Jersey	453 MW	Yards Creek Energy
Ross	Washington	450 MW	City Of Seattle - (Wa)
Seneca Generation Llc	Pennsylvania	438 MW	Seneca Generation Llc
Hungry Horse	Montana	428 MW	U S Bureau Of Reclamation
W R Gianelli	California	424 MW	California Dept. Of Water Resources
Hartwell Lake	Georgia	420 MW	Usce-Savannah District
Safe Harbor	Pennsylvania	418 MW	Safe Harbor
Hells Canyon	Oregon	411 MW	Idaho Power Co
Taum Sauk	Missouri	408 MW	Union Electric Co - (Mo)
Wheeler Dam	Alabama	404 MW	Tennessee Valley Authority
Round Butte	Oregon	373 MW	Portland General Electric Co
J Strom Thurmond	South Carolina	362 MW	Usce-Savannah District
Cowans Ford	North Carolina	350 MW	Duke Energy Carolinas, Llc
Bull Shoals	Arkansas	340 MW	Usce-Little Rock District
Wallace Dam	Georgia	321 MW	Georgia Power Co
Fort Randall	South Dakota	320 MW	Usace-Omaha
Colgate	California	315 MW	Yuba County Water Agency
Cabin Creek	Colorado	300 MW	Public Service Co Of Colorado
Mossyrock	Washington	300 MW	City Of Tacoma - (Wa)
New Melones	California	300 MW	U S Bureau Of Reclamation
John H Kerr	Virginia	297 MW	Usce-Wilmington District
Yellowtail	Montana	278 MW	U S Bureau Of Reclamation
Devil Canyon	California	276 MW	California Dept. Of Water Resources
Wolf Creek	Kentucky	270 MW	Usce-Nashville District
White Rock/Slab Creek	California	269 MW	Sacramento Municipal Util Dist
Cabinet Gorge	Idaho	265 MW	Avista Corp
Salina	Oklahoma	259 MW	Grand River Dam Authority
Davis Dam	Arizona	255 MW	U S Bureau Of Reclamation
Fontana Dam	North Carolina	255 MW	Tennessee Valley Authority
Collierville Powerhouse	California	253 MW	Northern California Power Agny
Holtwood	Pennsylvania	247 MW	Bif Iii Holtwood Llc
Lewiston Niagara	New York	240 MW	New York Power Authority
Pickwick Landing Dam	Tennessee	240 MW	Tennessee Valley Authority
Swift 1	Washington	240 MW	Pacificorp
Selis Ksanka Qlispe	Montana	228 MW	Energy Keepers Inc
Walter Bouldin Dam	Alabama	225 MW	Alabama Power Co
Kentucky Dam	Kentucky	219 MW	Tennessee Valley Authority
Martin Dam	Alabama	211 MW	Alabama Power Co
Osage Dam	Missouri	208 MW	Union Electric Co - (Mo)
Saluda Lexington	South Carolina	207 MW	Dominion Energy South Carolina, Inc
Gorge	Washington	207 MW	City Of Seattle - (Wa)
Table Rock	Missouri	200 MW	Usce-Little Rock District
Mount Elbert	Colorado	200 MW	U S Bureau Of Reclamation
J S Eastwood	California	200 MW	Southern California Edison Co
Folsom	California	199 MW	U S Bureau Of Reclamation
S C Moore	New Hampshire	195 MW	Great River Hydro, Llc
Sidney A Murray Jr Hydroelectric	Louisiana	192 MW	First National Bank-Commerce
Mammoth Pool	California	190 MW	Southern California Edison Co
Oxbow (Or)	Oregon	190 MW	Idaho Power Co
Diablo	Washington	182 MW	City Of Seattle - (Wa)
Lewis Smith Dam	Alabama	181 MW	Alabama Power Co
Spring Creek	California	180 MW	U S Bureau Of Reclamation