Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Seneca Falls Seneca	High Hazard	68 ft	1912	Concrete	New York
Sequoyah Dam Macon	High Hazard	—	1926	Concrete	North Carolina
Seven Mile Oneida	Low Hazard	10 ft	1908	Gravity	Wisconsin
Sewalls South Channel Dam Jefferson	Significant Hazard	16 ft	1978	Concrete	New York
Seymour Lake Orleans	Low Hazard	12 ft	1928	—	Vermont
Shasta Shasta	High Hazard	602 ft	1945	Concrete	California
Shaver Lake Fresno	High Hazard	180 ft	1927	Concrete	California
Shawano Shawano	Low Hazard	28 ft	1928	Earth	Wisconsin
Shawano Paper Mills Shawano	Low Hazard	13 ft	1974	Gravity	Wisconsin
Shawmut Somerset	Low Hazard	26 ft	1912	Concrete	Maine
Shearon Harris Nuclear Power Plant Main Dam Chatham	Significant Hazard	—	1983	Earth	North Carolina
Shelburne Coos	Low Hazard	17 ft	1906	Concrete	New Hampshire
Sheldon Springs Franklin	Low Hazard	38 ft	1908	Buttress	Vermont
Shenandoah Page	Low Hazard	15 ft	1925	Gravity	Virginia
Shepaug New Haven	High Hazard	138 ft	1955	Concrete	Connecticut
Sherman Franklin	High Hazard	110 ft	1927	Other	Massachusetts
Sherman Island Warren	High Hazard	80 ft	1923	Concrete	New York
Shirley Pond Piscataquis	Low Hazard	13 ft	1959	Concrete	Maine
Shoshone Diversion Dam Garfield	High Hazard	21 ft	1909	Concrete	Colorado
Shoshone Falls Dam 1 Jerome	Low Hazard	16 ft	1907	Buttress	Idaho
Shoshone Falls Dam 2 Jerome	Low Hazard	16 ft	1907	Buttress	Idaho
Shoshone Falls Dam 3 Jerome	Low Hazard	15 ft	1907	Buttress	Idaho
Shoshone Falls Dam 4 Twin Falls	Low Hazard	18 ft	1907	Gravity	Idaho
Shotgun Creek Div Kodiak Island Borough	Low Hazard	40 ft	1984	Rockfill	Alaska
Shotter Creek Upper Dam Hoonah-Angoon Census Area	Significant Hazard	—	1968	Earth	Alaska
Silver Lake Addison	High Hazard	30 ft	1917	Earth	Vermont
Silver Lake Amador	High Hazard	32 ft	1876	Earth	California
Silver Lake Main Dam Marquette	High Hazard	30 ft	1912	Earth	Michigan
Sinclair Baldwin	High Hazard	104 ft	1953	Gravity	Georgia
Sissonville St. Lawrence	Low Hazard	16 ft	1990	Concrete	New York
Skelton York	High Hazard	75 ft	1948	Concrete	Maine
Skookumchuck Thurston	High Hazard	160 ft	1970	Earth	Washington
Skunk Creek Dam St. Louis	Low Hazard	39 ft	1922	Earth	Minnesota
Slab Creek El Dorado	High Hazard	250 ft	1967	Concrete	California
Slate Creek Plumas	Low Hazard	68 ft	1961	Concrete	California
Slide Creek Douglas	Low Hazard	30 ft	1951	Gravity	Oregon
Sly Creek Butte	High Hazard	299 ft	1961	Earth	California
Smith Linn	High Hazard	215 ft	1963	Earth	Oregon
Smith Mountain Combination Pump Storage Pittsylvania	High Hazard	229 ft	1964	Arch	Virginia
Smith River Dam Henry	High Hazard	38 ft	—	Gravity	Virginia
Smithville Eaton	Low Hazard	14 ft	1913	Gravity	Michigan
Snell Canyon Lincoln	Low Hazard	25 ft	1941	Earth	Nebraska
Snoqualmie Falls King	Low Hazard	19 ft	1898	Gravity	Washington
Snow's Pond Piscataquis	High Hazard	28 ft	1970	Earth	Maine
Soda Caribou	High Hazard	103 ft	1925	Concrete	Idaho
Soda Springs Douglas	High Hazard	125 ft	1952	Arch	Oregon
Soft Maple Terminal Lewis	High Hazard	100 ft	1926	Other	New York
Solomon Gulch Chugach Census Area	High Hazard	115 ft	1981	Rockfill	Alaska
Somerset Windham	High Hazard	110 ft	1913	Other	Vermont
Somersworth Strafford	Significant Hazard	17 ft	1929	Masonry	New Hampshire