Water Supply Dams

7,228 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Stanley Lake No 1 Dam Hempstead	Low Hazard	22 ft	1955	Earth	Arkansas
Stanley Lake No 2 Dam Hempstead	Low Hazard	22 ft	1968	Earth	Arkansas
Starkey Pond Calvert	Low Hazard	11 ft	1950	Earth	Maryland
Starvation Canyon San Juan	High Hazard	—	1985	Earth	Utah
Stassney Lake Dam Shackelford	Low Hazard	17 ft	1960	Earth	Texas
State Cattle Ranch Dam No 1 Hale	Low Hazard	—	1972	Earth	Alabama
State Cattle Ranch Dam No.3 Hale	Low Hazard	—	1973	Earth	Alabama
State Cattle Ranch Dam No.4 Hale	Low Hazard	—	1972	Earth	Alabama
State of South Dakota Potter	Low Hazard	12 ft	1954	Earth	South Dakota
State Street Aroostook	Low Hazard	21 ft	1928	Timber Crib	Maine
State Street Dam Gratiot	Significant Hazard	18 ft	1938	Gravity	Michigan
Statesville Raw Water Reservoir Dam Iredell	High Hazard	—	1973	Earth	North Carolina
Staunton Dam Augusta	High Hazard	46 ft	—	Gravity	Virginia
Staunton Reservoir Dam Macoupin	Low Hazard	43 ft	1926	Earth	Illinois
St. Charles #2 Pueblo	High Hazard	35 ft	1913	Earth	Colorado
St. Charles #3 Pueblo	High Hazard	53 ft	1913	Earth	Colorado
St. Charles Mesa Pueblo	Significant Hazard	16 ft	1975	Earth	Colorado
St. Charles Mesa #2 Pueblo	High Hazard	35 ft	1980	Earth	Colorado
St. Clairsville Reservoir No. 1 Dam Belmont	High Hazard	36 ft	1929	Earth	Ohio
St. Clairsville Reservoir No. 2 Dam Belmont	High Hazard	31 ft	1920	Earth	Ohio
St. Cloud Stearns	High Hazard	22 ft	1972	Gravity	Minnesota
Steamboat Lake Siskiyou	Significant Hazard	22 ft	1968	Earth	California
Stedman Marsh Dam Berkshire	Low Hazard	8 ft	—	Concrete	Massachusetts
Steel Dam Coconino	Low Hazard	46 ft	1898	Multi-Arch	Arizona
Steel Dynamics Pond 1 Dam Lowndes	Low Hazard	11 ft	2006	Earth	Mississippi
Steel Dynamics Pond 2 Dam Lowndes	Low Hazard	10 ft	2006	Earth	Mississippi
Steele Millpond Dam Richmond	Low Hazard	—	1896	Concrete	North Carolina
Steele Reservoir Dam Saratoga	Significant Hazard	64 ft	1907	Earth	New York
Steeles Mill Reservoir Dam Henry	High Hazard	42 ft	1980	Masonry	Georgia
Steidlmayer #3 Sutter	Low Hazard	49 ft	1961	Earth	California
Steinberg Lake Dam Camden	Low Hazard	30 ft	—	Earth	Missouri
Stein Lake Dam Warren	Low Hazard	30 ft	1969	Earth	Missouri
St. Elmo Old City Reservoir Dam Fayette	Significant Hazard	23 ft	1903	Earth	Illinois
Stephen A. Forbes State Park Lake Dam Marion	Significant Hazard	46 ft	1963	Earth	Illinois
Stephen Mission Hyde	Low Hazard	26 ft	1943	Earth	South Dakota
Stephens Lake Dam Clay	Low Hazard	15 ft	1963	Earth	Texas
Stephens Lake Dam Grant	Low Hazard	29 ft	1960	Earth	Arkansas
Sterling C Robertson Dam Leon	High Hazard	62 ft	1978	Earth	Texas
Sterling Forest Lake Dam Orange	High Hazard	30 ft	1953	Concrete	New York
Sterling Lake Dam Prince Edward	Unknown	20 ft	—	Earth	Virginia
Sterling Lake Dam Orange	Low Hazard	15 ft	1910	Earth	New York
Stern Lake Dam Grayson	Low Hazard	21 ft	1970	Earth	Texas
Stevenot Calaveras	High Hazard	70 ft	1987	Earth	California
Stevens Archuleta	High Hazard	42 ft	1948	Earth	Colorado
Stevens Creek Santa Clara	High Hazard	132 ft	1935	Earth	California
Stevens Lake Dam Nelson	Unknown	31 ft	—	Earth	Virginia
Stevens Lake Dam Hamilton	Low Hazard	32 ft	1956	Earth	Texas
Stevens Paper Co. Lower Dam Hampden	Low Hazard	30 ft	1900	Earth	Massachusetts
Stevens Point Portage	High Hazard	26 ft	1916	Gravity	Wisconsin
Stewart Elmore	Low Hazard	—	1958	Earth	Alabama