Water Supply Dams

7,228 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Smith Dam 1 Atascosa	Low Hazard	23 ft	1965	Earth	Texas
Smith Dam 2 Atascosa	Low Hazard	17 ft	1965	Earth	Texas
Smith Lake Dam Sec 1 Boone	Low Hazard	25 ft	1950	Earth	Missouri
Smithland Locks and Dam Livingston	Significant Hazard	—	1980	Concrete	Illinois
Smithleigh Dam Augusta	Unknown	22 ft	—	Earth	Virginia
Smithport Lake Road Pond De Soto	Low Hazard	33 ft	2009	Earth	Louisiana
Smith Reservoir Erie	High Hazard	34 ft	1925	Earth	Pennsylvania
Smithsburg Reservoir Washington	Significant Hazard	16 ft	1881	Earth	Maryland
Smiths Mills Reservoir Dam Chautauqua	Significant Hazard	19 ft	1906	Concrete	New York
Smithville Dam Clay	High Hazard	—	1979	Earth	Missouri
Smoke Creek Lassen	Low Hazard	37 ft	1949	Earth	California
Smugglers Notch Village Lamoille	Significant Hazard	30 ft	1966	Earth	Vermont
Smyth Lake Dam Uvalde	Low Hazard	15 ft	1960	Earth	Texas
Smyth Lake No 2 Dam Maverick	Low Hazard	16 ft	1963	Earth	Texas
Snafu Park	Low Hazard	40 ft	1967	Earth	Wyoming
Snake Creek Reservoir Dam Carroll	High Hazard	65 ft	—	Earth	Georgia
Snake Lake Larimer	Low Hazard	7 ft	1906	Earth	Colorado
Snare Creek Washington	Low Hazard	7 ft	1900	Other	Maine
Snoqualmie Ridge Golf Course Pond M1 King	Low Hazard	—	1997	Earth	Washington
Snowden Lake Dam La Salle	Low Hazard	15 ft	1941	Earth	Texas
Snowflower Placer	Low Hazard	28 ft	1964	Earth	California
Snow Hill INC. Lake Dam Clinton	Significant Hazard	24 ft	1969	Earth	Ohio
Snows Mill Pond Dam Worcester	High Hazard	28 ft	—	Masonry	Massachusetts
Snyder Lake Dam	Unknown	25 ft	2008	—	Indiana
Sobrante Clearwell Contra Costa	High Hazard	28 ft	1964	Earth	California
Soda Lake Santa Cruz	High Hazard	44 ft	1978	Earth	California
Soda Lake #1 Jefferson	Low Hazard	30 ft	1977	Earth	Colorado
Soda Lake #2 Jefferson	Low Hazard	12 ft	1977	Earth	Colorado
Sodom Dam Putnam	High Hazard	78 ft	1892	Masonry	New York
Soil Conservation Service Lake (Soil Conservation Road) Prince George's	Low Hazard	17 ft	1939	Earth	Maryland
Soldiers Meadow Nez Perce	High Hazard	69 ft	1921	Earth	Idaho
Somerset Reservoir Dam Bristol	High Hazard	48 ft	1965	Concrete	Massachusetts
Somerset Reservoir Dam Perry	Significant Hazard	35 ft	1941	Earth	Ohio
Somersworth Strafford	Significant Hazard	17 ft	1929	Masonry	New Hampshire
Somerville Dam Washington	High Hazard	80 ft	1967	Earth	Texas
Somerville-Mccullah Mesa	High Hazard	42 ft	1972	Earth	Colorado
Sonoma Hills Sonoma	Low Hazard	38 ft	1991	Earth	California
Soo Locks Chippewa	High Hazard	—	1921	Concrete	Michigan
Sorenson Pond McKenzie	Significant Hazard	24 ft	—	—	North Dakota
Sougahatchee Lee	High Hazard	—	1932	Earth	Alabama
Soulajule Marin	High Hazard	122 ft	1979	Earth	California
South Anna Dam #22 Louisa	High Hazard	37 ft	—	Earth	Virginia
South Bottom Ash Pond Pushmataha	Low Hazard	19 ft	—	—	Oklahoma
South Boulder Diversion Intake Dam Boulder	Low Hazard	34 ft	1936	Concrete	Colorado
Southbridge Reservoir #3 Dam Worcester	Significant Hazard	24 ft	1894	Earth	Massachusetts
Southbridge Reservoir #4 Dam Worcester	Significant Hazard	18 ft	1906	Earth	Massachusetts
Southbridge Reservoir #5 Dam Worcester	Significant Hazard	33 ft	1938	Earth	Massachusetts
South Catamount Teller	High Hazard	100 ft	1935	Earth	Colorado
South Colo. Power Co. Pueblo	Low Hazard	23 ft	1927	Earth	Colorado
South Deerfield Water Supply Dam Franklin	Significant Hazard	30 ft	1953	Concrete	Massachusetts