Water Supply Dams

7,228 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Southeast Reservoir Dam Monroe	Significant Hazard	25 ft	1972	Earth	New York
Southerland Lake Dam Coweta	Low Hazard	15 ft	1989	Earth	Georgia
Southern Chain of Lakes Outfall Polk	Significant Hazard	9 ft	—	Earth	Florida
Southern Pines Raw Water Reservoir Dam Moore	High Hazard	—	2012	Earth	North Carolina
South Flat Top Dam Bosque	Low Hazard	25 ft	1966	Earth	Texas
South Fork Bud Kimball Washakie	Low Hazard	25 ft	—	Earth	Wyoming
South Fork Diversion Plumas	Low Hazard	60 ft	1961	Concrete	California
South Fourche Lafave Wid Site 7 Perry	High Hazard	85 ft	1978	Earth	Arkansas
South Holston Dam Sullivan	High Hazard	285 ft	1950	Rockfill	Tennessee
South Hyco Lake Dam Person	High Hazard	—	1977	Earth	North Carolina
Southington Reservoir #1 Dam Hartford	Significant Hazard	18 ft	—	Earth	Connecticut
Southington Reservoir #2 Dam New Haven	Significant Hazard	38 ft	1900	Earth	Connecticut
Southington Reservoir #3 Dam Hartford	High Hazard	26 ft	—	Earth	Connecticut
South Lake Dam Jones	High Hazard	38 ft	1939	Earth	Texas
South Lake Dam Oklahoma	Significant Hazard	16 ft	2005	Earth	Oklahoma
South Norwalk Reservoir Dam Fairfield	High Hazard	36 ft	1899	Earth	Connecticut
South Pacolet River Res 1 Spartanburg	High Hazard	74 ft	1926	—	South Carolina
South Platte Reservoir Arapahoe	High Hazard	64 ft	2007	Earth	Colorado
South Pond Dam Calhoun	Low Hazard	—	1943	Rockfill	Arkansas
South Pond Dam Nassau	Low Hazard	13 ft	1903	Earth	New York
South Pond Dam Putnam	Low Hazard	15 ft	1929	—	Indiana
South Prong Dam Ellis	High Hazard	62 ft	1956	Earth	Texas
South Reservoir Dam Middlesex	High Hazard	45 ft	1882	Earth	Massachusetts
South Reservoir East Dike Middlesex	High Hazard	15 ft	1882	Earth	Massachusetts
South River Dam #10a Augusta	High Hazard	98 ft	—	Earth	Virginia
South Suburban El Paso	High Hazard	47 ft	1932	Earth	Colorado
South Tani Reservoir Adams	High Hazard	22 ft	2006	Earth	Colorado
Southwest Iowa Egg Cooperative Dam Cass	Low Hazard	38 ft	1999	Earth	Iowa
Sowell Dam Chesterfield	Significant Hazard	13 ft	1966	—	South Carolina
Sow Pond Dam Hempstead	Low Hazard	17 ft	1968	Rockfill	Arkansas
Spanish Peaks Ranch #13 Las Animas	Low Hazard	34 ft	1957	Earth	Colorado
Sparrow Reservoir Dam Harrison	Low Hazard	33 ft	1949	Earth	Ohio
Sparta New City Reservoir Dam Randolph	Significant Hazard	16 ft	1952	Earth	Illinois
Sparta Old City Reservoir Dam Randolph	Significant Hazard	21 ft	1917	Earth	Illinois
Spaulding Lassen	Low Hazard	28 ft	1954	Earth	California
Spaulding Dam Sangamon	High Hazard	48 ft	1933	Concrete	Illinois
Spavinaw Mayes	High Hazard	75 ft	1922	Earth	Oklahoma
Spearhead Pond #1 Converse	Low Hazard	31 ft	2016	Earth	Wyoming
Spectacle San Miguel	Low Hazard	26 ft	1940	Earth	Colorado
Speights Run Dam Suffolk	High Hazard	26 ft	—	Earth	Virginia
Sphagnum Pond Dam Orange	Significant Hazard	15 ft	1930	Masonry	New York
Spindor Lake Dam Erath	Low Hazard	33 ft	1960	Earth	Texas
Spinney Mountain Park	High Hazard	90 ft	1982	Earth	Colorado
Split Rock Pond Dam Morris	High Hazard	39 ft	1948	Concrete	New Jersey
Spooner Lassen	Low Hazard	17 ft	1906	Earth	California
Spot Pond Dam Middlesex	Significant Hazard	18 ft	—	Earth	Massachusetts
Spot Pond Dike #4 Middlesex	Significant Hazard	9 ft	1880	Earth	Massachusetts
Spot Pond Dike #5 Middlesex	Significant Hazard	9 ft	1880	Earth	Massachusetts
Spriggs Rock Rice	Low Hazard	31 ft	1940	Earth	Kansas
Spring Madera	Significant Hazard	41 ft	1971	Earth	California