Water Supply Dams

7,228 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Stewart Dam Sussex	Significant Hazard	14 ft	1965	Earth	New Jersey
Stewart Lake Dam Madison	Low Hazard	23 ft	1961	Earth	Texas
Stewart Lake Dam Erath	Low Hazard	27 ft	1964	Earth	Texas
Stewart Mountain Maricopa	High Hazard	207 ft	1929	Concrete	Arizona
St. Helena Lower Napa	High Hazard	44 ft	1878	Earth	California
Stigler Lake Haskell	High Hazard	40 ft	1939	Earth	Oklahoma
Stiles Pond Caledonia	High Hazard	14 ft	1877	Gravity	Vermont
Still Creek Schuylkill	High Hazard	86 ft	1935	Earth	Pennsylvania
Stillhouse Hollow Dam Bell	High Hazard	195 ft	1968	Earth	Texas
Stillhouse Hollow Dam - Dike Bell	High Hazard	195 ft	1968	Earth	Texas
Stillwagon Lake Dam Madison	Low Hazard	36 ft	1964	Earth	Texas
Stillwater Dam Susquehanna	High Hazard	77 ft	1960	Rockfill	Pennsylvania
Stillwater Pond Dam Putnam	Low Hazard	42 ft	1939	Concrete	New York
Stillwell Orange	High Hazard	62 ft	1948	Concrete	New York
Stillwell Lake Dam Mills	Low Hazard	19 ft	1976	Earth	Texas
Stink Creek Tank Dam Garza	Low Hazard	18 ft	1955	Earth	Texas
Stinking Buffalo Harding	Low Hazard	19 ft	1951	Earth	South Dakota
Stinson Run Berks	Low Hazard	29 ft	1985	Earth	Pennsylvania
Stj03 St. Johns	Low Hazard	11 ft	—	Earth	Florida
Stj05 St. Johns	High Hazard	7 ft	—	Earth	Florida
St. Joseph River (In-Channel) Dam Allen	Significant Hazard	10 ft	1933	Concrete	Indiana
St. Louis River St. Louis	Low Hazard	19 ft	1963	Gravity	Minnesota
St. Mary Land & Exploration Co. Atoka	Low Hazard	17 ft	—	—	Oklahoma
St. Marys Lake Clear Creek	Significant Hazard	9 ft	1889	Earth	Colorado
St Marys Pond Newport	High Hazard	12 ft	1878	Rockfill	Rhode Island
Stockton Creek Mariposa	High Hazard	95 ft	1950	Earth	California
Stockton Dam Cedar	High Hazard	—	1969	Rockfill	Missouri
Stockton Lake Dam Lavaca	Low Hazard	12 ft	1965	Earth	Texas
Stone Canyon Los Angeles	High Hazard	188 ft	1924	Earth	California
Stone Creek Golf Club Lake Dam Jackson	High Hazard	43 ft	2001	—	Illinois
Stone Dam Penobscot	High Hazard	27 ft	1900	Concrete	Maine
Stone Dam - Dike 1 Penobscot	Low Hazard	10 ft	1900	Earth	Maine
Stone Dam - Dike 2 Penobscot	Low Hazard	10 ft	1900	Earth	Maine
Stone Dam - Dike 3 Penobscot	Low Hazard	10 ft	1900	Earth	Maine
Stone Dam - Dike 4 Penobscot	Low Hazard	9 ft	1900	Earth	Maine
Stone Dam - Dike 5 Penobscot	Low Hazard	9 ft	1900	Earth	Maine
Stone Dam - Dike 6 Penobscot	Low Hazard	9 ft	1900	Earth	Maine
Stone Dam - Dike 7 Penobscot	Low Hazard	9 ft	1900	Earth	Maine
Stone Dam - Dike 8 Penobscot	High Hazard	9 ft	1900	Earth	Maine
Stoneham Lake Dam Grimes	Low Hazard	24 ft	1955	Earth	Texas
Stone Hill Reservoir Dam New London	Significant Hazard	35 ft	1894	Earth	Connecticut
Stonewall Jackson Dam Lewis	High Hazard	—	1986	Gravity	West Virginia
Stoney Creek Reservoir Dam (Bedford) Bedford	High Hazard	54 ft	—	Earth	Virginia
Stoney Fork Slurry Dam Bell	High Hazard	264 ft	—	Earth	Kentucky
Stony Brook Dam Middlesex	Significant Hazard	15 ft	—	Earth	Massachusetts
Stony Brook Dam Middlesex	Significant Hazard	24 ft	1870	Earth	Massachusetts
Stony Brook Reservoir Dam Middlesex	High Hazard	32 ft	1887	Earth	Massachusetts
Stony Brook Reservoir Dam New London	Significant Hazard	40 ft	1912	Earth	Connecticut
Stony Garden Reservoir Monroe	Low Hazard	26 ft	1912	Earth	Pennsylvania
Stony Gorge Glenn	High Hazard	119 ft	1928	Buttress	California