Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Soo Locks Chippewa	High Hazard	—	1921	Concrete	Michigan
South Barre Mill Pond Worcester	Significant Hazard	22 ft	1981	Concrete	Massachusetts
South Bend St. Joseph	Low Hazard	12 ft	1850	Timber Crib	Indiana
South Berwick York	Low Hazard	38 ft	1923	Concrete	Maine
South Berwick Strafford	Low Hazard	18 ft	1923	Concrete	New Hampshire
South Catamount Teller	High Hazard	100 ft	1935	Earth	Colorado
South Colton St. Lawrence	High Hazard	42 ft	1954	Gravity	New York
South Edwards St. Lawrence	Significant Hazard	48 ft	1914	Concrete	New York
South Fork Diversion Plumas	Low Hazard	60 ft	1961	Concrete	California
South Fork Diversion Dam Jackson	Low Hazard	25 ft	1932	Concrete	Oregon
South Holston Dam Sullivan	High Hazard	285 ft	1950	Rockfill	Tennessee
South Meduxnekeag Aroostook	Low Hazard	8 ft	—	Concrete	Maine
South Milton Strafford	Low Hazard	15 ft	1893	Masonry	New Hampshire
South Pacolet River Res 1 Spartanburg	High Hazard	74 ft	1926	—	South Carolina
South Pelican Oneida	Low Hazard	8 ft	1908	Gravity	Wisconsin
South Rivanna Albemarle	High Hazard	47 ft	1965	Gravity	Virginia
Spaulding Pond Dam Strafford	Low Hazard	19 ft	1899	Concrete	New Hampshire
Spencer Lake San Juan	Low Hazard	42 ft	1983	Rockfill	Washington
Spencer Lake Somerset	Low Hazard	14 ft	1946	Concrete	Maine
Spencer Mountain Gaston	Low Hazard	12 ft	1905	Masonry	North Carolina
Spencer Mountain-Canal Embankment Gaston	Low Hazard	10 ft	1905	—	North Carolina
Spier Falls Warren	High Hazard	146 ft	1903	Masonry	New York
Spirit Lincoln	High Hazard	26 ft	1922	Gravity	Wisconsin
Springs Island York	Low Hazard	12 ft	1925	Concrete	Maine
Squam Lake Grafton	Significant Hazard	17 ft	1856	Concrete	New Hampshire
Squirrel Lake Oneida	Low Hazard	7 ft	1908	Gravity	Wisconsin
Stagecoach La Plata	High Hazard	12 ft	—	Timber Crib	Colorado
Stagecoach Routt	High Hazard	150 ft	1988	Roller-Compacted Concrete	Colorado
Stanhope Mill #2 Lower Penobscot	Low Hazard	13 ft	1827	Concrete	Maine
Stanislaus Forebay East Tuolumne	Low Hazard	55 ft	1908	Earth	California
Staples Gin Dam Caldwell	Low Hazard	10 ft	—	Buttress	Texas
Stark Falls Dike G St. Lawrence	Significant Hazard	10 ft	1957	Rockfill	New York
Star Lake Dam Sullivan	Low Hazard	7 ft	1920	Concrete	New Hampshire
Star Mill Dam LaGrange	Low Hazard	9 ft	1929	Concrete	Indiana
Starved Rock Lock and Dam LaSalle	Significant Hazard	—	1933	Concrete	Illinois
Station 2 Monroe	Low Hazard	11 ft	1936	Gravity	New York
Station 26 Monroe	Significant Hazard	18 ft	1952	Gravity	New York
Station 5 Monroe	Low Hazard	22 ft	1918	Gravity	New York
St. Cloud Stearns	High Hazard	22 ft	1972	Gravity	Minnesota
Steel Rock Island	Low Hazard	6 ft	1912	Gravity	Illinois
Steels Pond Hillsborough	Significant Hazard	14 ft	1909	Concrete	New Hampshire
Sterner Dam Ionia	Low Hazard	13 ft	1921	Gravity	Michigan
Stevens Coneross Dam Oconee	Unknown	20 ft	—	—	South Carolina
Stevens Creek Columbia	High Hazard	37 ft	1914	Gravity	Georgia
Stevens Mill Merrimack	Significant Hazard	22 ft	1930	Concrete	New Hampshire
Stevenson Fairfield	High Hazard	103 ft	1919	Concrete	Connecticut
Stevens Point Portage	High Hazard	26 ft	1916	Gravity	Wisconsin
Stewart Mountain Maricopa	High Hazard	207 ft	1929	Concrete	Arizona
Stewarts Bridge Saratoga	High Hazard	113 ft	1952	Concrete	New York
Stiles Oconto	High Hazard	29 ft	1949	Earth	Wisconsin