Water Supply Dams

7,228 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Stony Point Dam Rockland	Significant Hazard	16 ft	1900	Concrete	New York
Stony Run Union	Significant Hazard	39 ft	—	Earth	Pennsylvania
Stotts Lake Dam Henry	Low Hazard	25 ft	1971	Earth	Missouri
Straitsville Reservoir Dam New Haven	Significant Hazard	25 ft	1900	Earth	Connecticut
Strangmans Pond Dam Essex	High Hazard	10 ft	1884	Earth	Massachusetts
Strasburg Dam Shenandoah	Significant Hazard	36 ft	—	Earth	Virginia
Straza El Dorado	Low Hazard	62 ft	1971	Earth	California
Streator Vermilion River Dam Livingston	Significant Hazard	14 ft	1925	Gravity	Illinois
Streeter Pond Dam Worcester	Low Hazard	12 ft	1920	Rockfill	Massachusetts
Strickland Dam No 1 Atascosa	Low Hazard	10 ft	1968	Earth	Texas
Strickland Dam No 2 Atascosa	Low Hazard	7 ft	1968	Earth	Texas
Strodtman Lake Dam Howard	Low Hazard	25 ft	1965	Earth	Missouri
Strong & Stewart Lake Dam Sullivan	Low Hazard	25 ft	1970	Earth	Missouri
Strontia Springs Douglas	High Hazard	292 ft	1982	Concrete	Colorado
Stropes Lake Dam Johnson	Low Hazard	25 ft	—	Earth	Missouri
Stroupe Lake Dam Howard	Low Hazard	25 ft	1977	Earth	Missouri
Strowbridge Dam Osage	High Hazard	45 ft	1966	Earth	Kansas
Structure No. 12 Johnson	Significant Hazard	54 ft	1974	Earth	Illinois
Stuart Water Treatment Plant Dam Patrick	Unknown	34 ft	—	Earth	Virginia
Stufflbeme Dam Bosque	Low Hazard	35 ft	1965	Earth	Texas
Stumler Dam Clark	Low Hazard	31 ft	1935	Earth	Indiana
Stump Franklin	Low Hazard	10 ft	1948	Concrete	Maine
Stump Lake Dam Stanly	Low Hazard	—	1964	Earth	North Carolina
Stumpy Hill Farm Dam Edwards	Low Hazard	31 ft	1998	Earth	Illinois
Stumpy Lake Dam Chesapeake	Significant Hazard	10 ft	—	Earth	Virginia
Sturgis #2 Meade	Significant Hazard	30 ft	1894	Gravity	South Dakota
Sturgis #4 Meade	Significant Hazard	37 ft	1929	Gravity	South Dakota
Sturgis #5 Meade	Significant Hazard	44 ft	1959	Earth	South Dakota
Stuts Dam Orange	Significant Hazard	10 ft	—	Earth	New York
Subiaco Dam (Lower) Logan	Significant Hazard	35 ft	1948	Rockfill	Arkansas
Subiaco Dam (Upper) Logan	Significant Hazard	27 ft	1948	Rockfill	Arkansas
Sudbury Reservoir Dam Worcester	High Hazard	77 ft	1899	Concrete	Massachusetts
Sugar Camp/Mine 1/Fresh Water Lake Dam Franklin	Low Hazard	31 ft	—	Earth	Illinois
Sugar Camp/Mine 1/Fresh Water Pond Dam Franklin	Low Hazard	26 ft	—	Earth	Illinois
Sugar Creek Lake Dam Randolph	Low Hazard	49 ft	1957	Earth	Missouri
Sugar Hollow Dam Albemarle	High Hazard	77 ft	—	Gravity	Virginia
Sugar Pine Placer	High Hazard	251 ft	1981	Earth	California
Sugar Run Westmoreland	High Hazard	60 ft	1907	Earth	Pennsylvania
Sully Dam Sully	Low Hazard	22 ft	1938	Earth	South Dakota
Sulphur Creek Orange	High Hazard	42 ft	1966	Earth	California
Sulphur Creek Uinta	High Hazard	85 ft	1964	Earth	Wyoming
Summers Lake Dam Kinney	Low Hazard	12 ft	1944	Earth	Texas
Summit Hall Park Dam Montgomery	High Hazard	14 ft	1993	Arch	Maryland
Summit Lake Greenbrier	High Hazard	34 ft	1955	Earth	West Virginia
Summit Lake Reservoir Lackawanna	High Hazard	30 ft	1875	Earth	Pennsylvania
Summit Reservoir San Francisco	High Hazard	39 ft	—	Earth	California
Summit Reservoir Solano	High Hazard	124 ft	1968	Earth	California
Summitville Tailings Rio Grande	Low Hazard	80 ft	1968	Earth	Colorado
Sumter Farm and Stock Company Sumter	Low Hazard	—	1941	Earth	Alabama
Sumter Farm and Stock Company Sumter	Significant Hazard	—	1943	Earth	Alabama