Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Abbott Brook Dike Oxford	High Hazard	27 ft	1911	Other	Maine
Abenaki Somerset	Low Hazard	25 ft	1922	Concrete	Maine
Ada Kent	Low Hazard	32 ft	1926	Multi-Arch	Michigan
Adams Pond Lincoln	Low Hazard	8 ft	1935	Concrete	Maine
Adamsville Hydroelectric Dam Cass	High Hazard	11 ft	1865	Earth	Michigan
Adjuntas Dam Adjuntas	High Hazard	80 ft	1950	Gravity	Puerto Rico
Agnew Lake Mono	High Hazard	30 ft	1916	Concrete	California
Akutan Hydro Dam Aleutians East Borough	Significant Hazard	21 ft	1993	Earth	Alaska
Albeni Falls Dam Bonner	High Hazard	—	1955	Concrete	Idaho
Alcona Alcona	High Hazard	60 ft	1924	Gravity	Michigan
Alcova Natrona	High Hazard	265 ft	1937	Earth	Wyoming
Alder Pierce	High Hazard	285 ft	1945	Concrete	Washington
Alder Pond Oneida	High Hazard	15 ft	1850	Earth	New York
Alexander Lincoln	High Hazard	38 ft	1913	Gravity	Wisconsin
Alexander Kauai	High Hazard	119 ft	1931	Earth	Hawaii
Alice Falls Clinton	Low Hazard	80 ft	1895	Gravity	New York
Allatoona Dam Bartow	High Hazard	—	1965	Gravity	Georgia
Allegan Allegan	Low Hazard	30 ft	1936	Gravity	Michigan
Allegheny River Lock and Dam 6 Armstrong	Low Hazard	—	1928	Gravity	Pennsylvania
Allegheny River Lock and Dam 8 Armstrong	Low Hazard	—	1931	Gravity	Pennsylvania
Allegheny River Lock and Dam 9 Armstrong	Low Hazard	—	1938	Gravity	Pennsylvania
Allen Pond Androscoggin	Low Hazard	7 ft	1850	Concrete	Maine
Allens Falls St. Lawrence	High Hazard	37 ft	1991	Concrete	New York
Allied Leather Auxiliary Merrimack	Low Hazard	15 ft	1982	Concrete	New Hampshire
Alpine Main Alpine	High Hazard	49 ft	1891	Rockfill	California
Alverno Cheboygan	Low Hazard	19 ft	1902	Earth	Michigan
Amana Millrace Diversion Dam Iowa	Low Hazard	9 ft	—	—	Iowa
American Tissue Kennebec	High Hazard	24 ft	1900	Masonry	Maine
Amherst Portage	Significant Hazard	14 ft	1857	Gravity	Wisconsin
Amistad Dam Val Verde	High Hazard	254 ft	1969	Concrete	Texas
Ammonoosuc River Grafton	Low Hazard	17 ft	1900	Concrete	New Hampshire
Amoskeag Hillsborough	High Hazard	29 ft	1921	Concrete	New Hampshire
Anamosa Jones	Low Hazard	12 ft	1909	Gravity	Iowa
Anderson Santa Clara	High Hazard	240 ft	1950	Rockfill	California
Anderson Ranch Elmore	High Hazard	456 ft	1946	Earth	Idaho
Anderson Ranch Nevada	Low Hazard	47 ft	1989	Earth	California
Angelo Dam Monroe	Low Hazard	20 ft	1920	—	Wisconsin
Annabessacook Lake Kennebec	Low Hazard	11 ft	1900	Concrete	Maine
Annex Creek City and Borough of Juneau	Low Hazard	20 ft	1968	Other	Alaska
Anson Somerset	Low Hazard	36 ft	1923	Concrete	Maine
Apalachia Dam Cherokee	High Hazard	150 ft	1943	Concrete	North Carolina
Apple River St. Croix	High Hazard	47 ft	1954	Masonry	Wisconsin
Apthorp Grafton	Significant Hazard	24 ft	1936	Concrete	New Hampshire
Arnold Falls Caledonia	Low Hazard	21 ft	—	Timber Crib	Vermont
Arpin Sawyer	Low Hazard	12 ft	1913	Gravity	Wisconsin
Arsenal Power Rock Island	Low Hazard	26 ft	1878	Concrete	Illinois
Arthur V. Ormond Lock and Dam Conway	Significant Hazard	28 ft	1969	Concrete	Arkansas
Ashton Fremont	High Hazard	65 ft	1917	Earth	Idaho
Ashuelot Paper Mill Dam Cheshire	Low Hazard	18 ft	1910	Concrete	New Hampshire
Aspaas La Plata	Low Hazard	27 ft	1980	Earth	Colorado