Water Supply Dams

7,228 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Black Lake Dam Hood	Low Hazard	18 ft	1959	Earth	Texas
Black Lake No 2 Dam Hood	Low Hazard	21 ft	1977	Earth	Texas
Black Lake No 3 Dam Hood	Low Hazard	19 ft	1977	Earth	Texas
Black Lake No 4 Dam Hood	Low Hazard	28 ft	1956	Earth	Texas
Black Lake No 5 Dam Hood	Low Hazard	21 ft	1959	Earth	Texas
Black Lake No 6 Dam Hood	Low Hazard	28 ft	1955	Earth	Texas
Black Lake No 7 Dam Hood	Low Hazard	17 ft	1955	Earth	Texas
Black Mountain Reservoir Dam Buncombe	High Hazard	—	—	Earth	North Carolina
Black Mountain Water Tank San Diego	High Hazard	55 ft	2002	Other	California
Black Reservoir Mono	Low Hazard	18 ft	1905	Earth	California
Black Rock McKinley	High Hazard	—	1908	Earth	New Mexico
Black Rock Montgomery	Low Hazard	11 ft	1900	Timber Crib	Pennsylvania
Black Rock Creek Monterey	Low Hazard	54 ft	1925	Earth	California
Black Run Creek Dam Cabarrus	High Hazard	—	1988	Earth	North Carolina
Blacks Creek Reservoir Rabun	Low Hazard	27 ft	1987	Earth	Georgia
Blackstone River Dam Worcester	Significant Hazard	12 ft	—	Masonry	Massachusetts
Blackstone River Saranac Dam At Canal Street Worcester	Low Hazard	13 ft	1910	Rockfill	Massachusetts
Blackwell Kay	Low Hazard	20 ft	1950	Buttress	Oklahoma
Bladens River Dam New Haven	Significant Hazard	12 ft	1906	Masonry	Connecticut
Blaine Drageset Corson	Low Hazard	24 ft	1950	Earth	South Dakota
Blair Gap Blair	High Hazard	47 ft	1907	Gravity	Pennsylvania
Blakely El Dorado	Low Hazard	19 ft	1875	Earth	California
Blakely Mountain Dam Garland	High Hazard	226 ft	1953	Earth	Arkansas
Blakemore Lake Dam Boone	Low Hazard	30 ft	1963	Earth	Missouri
Blalock Dam Mecklenburg	Unknown	24 ft	—	Earth	Virginia
Blalock Reservoir Dam Henry	High Hazard	39 ft	1988	Earth	Georgia
Blanchard Lake Dam #1 Harnett	High Hazard	—	1943	Earth	North Carolina
Blanchard Lake Dam #2 Harnett	High Hazard	—	1953	Earth	North Carolina
Blanchard Lake Dam #3 Harnett	High Hazard	—	1953	Earth	North Carolina
Blanchard-Offner Napa	High Hazard	47 ft	1963	Earth	California
Blanchard Pond Dam Fairfield	Significant Hazard	10 ft	—	Masonry	Connecticut
Blanchester Reservoir No. 3 Dam Clinton	High Hazard	15 ft	1934	Earth	Ohio
Blanchester Reservoir No. 4 Dam Clinton	High Hazard	16 ft	1950	Earth	Ohio
Blanchester Reservoir No. 5 Dam Clinton	Significant Hazard	14 ft	1970	Earth	Ohio
Blanchester Reservoirs No. 1 & 2 Dam Clinton	Significant Hazard	10 ft	1924	Earth	Ohio
Blanchester Res No. 6 Dam Clinton	High Hazard	24 ft	2003	Earth	Ohio
Blanco City Dam No 1 Blanco	Low Hazard	12 ft	1957	Buttress	Texas
Blanco Tank Dam McMullen	Low Hazard	15 ft	1969	Earth	Texas
Blanding City No. 4 San Juan	High Hazard	—	1965	Earth	Utah
Blandinsville City Reservoir Dam McDonough	High Hazard	20 ft	1940	Earth	Illinois
Blandinsville Storage 2 Dam McDonough	Low Hazard	37 ft	1992	Earth	Illinois
Blazer Pond Dam Schoharie	Significant Hazard	11 ft	—	Earth	New York
Blewett Falls Anson	High Hazard	54 ft	1912	Concrete	North Carolina
Blocker Lake Dam Harrison	Low Hazard	25 ft	1962	Earth	Texas
Blodgett Sacramento	Significant Hazard	19 ft	1939	Earth	California
Bloodgoods Pond Dam Union	Significant Hazard	14 ft	1935	Earth	New Jersey
Bloomfield Dam No. 1 San Juan	High Hazard	45 ft	1957	Earth	New Mexico
Blossom Valley Reservoir San Diego	High Hazard	42 ft	1962	Earth	California
Blue Bank Res Washakie	Low Hazard	—	2003	Gravity	Wyoming
Blue Canyon Apache	High Hazard	—	1984	Earth	Arizona