High Hazard Dams

Loss of human life is likely if the dam fails.

Dam Name	Hazard	Height	Built	Type	State
Alitak Cannery Dam #1 Kodiak Island Borough	High Hazard	9 ft	1917	Earth	Alaska
Allan Saxe Pond Tarrant	High Hazard	9 ft	—	Earth	Texas
Allan'S Mill Subdivision Pond 1 Dam Richland	High Hazard	10 ft	—	—	South Carolina
Allatoona Dam Bartow	High Hazard	—	1965	Gravity	Georgia
Allegan City Dam Allegan	High Hazard	14 ft	1900	Earth	Michigan
Allegheny Storage Blair	High Hazard	31 ft	1905	Earth	Pennsylvania
Allen Bennett	High Hazard	—	1961	Earth	South Dakota
Allen Lake	High Hazard	33 ft	1955	Earth	California
Allen Active Ash Basin Dam Gaston	High Hazard	—	1972	Earth	North Carolina
Allen Lake Dam Clay	High Hazard	28 ft	1961	Earth	Missouri
Allen Lake Dam Crawford	High Hazard	21 ft	1966	Earth	Illinois
Allen No. 1 Dam Perry	High Hazard	59 ft	1981	Earth	Ohio
Allen Park Dam Lower Wake	High Hazard	—	—	Earth	North Carolina
Allen Park Dam Upper Wake	High Hazard	—	—	Earth	North Carolina
Allen Reservoir PL-566 Flood Control Dam Norfolk	High Hazard	21 ft	1980	Earth	Massachusetts
Allen Retention Basin Dam Gaston	High Hazard	—	2018	Concrete	North Carolina
Allen Retired Ash Basin Dam Gaston	High Hazard	—	1957	Earth	North Carolina
Allens Falls St. Lawrence	High Hazard	37 ft	1991	Concrete	New York
Allentown Dam Monmouth	High Hazard	18 ft	—	Earth	New Jersey
Allen Trust Dam Wake	High Hazard	—	—	Other	North Carolina
Allerman #1 Dam Douglas	High Hazard	20 ft	—	Earth	Nevada
Allgeyer Lake Dam Montgomery	High Hazard	29 ft	1965	Earth	Missouri
Allison Reservoir Fayette	High Hazard	45 ft	1917	Earth	Pennsylvania
Allison Street Levee (Mt. Ranier) Prince George's	High Hazard	15 ft	1988	Earth	Maryland
Allsbrook Pond Dam Horry	High Hazard	16 ft	1955	—	South Carolina
Alluvial Drain Detention Fresno	High Hazard	12 ft	1994	Earth	California
Almaden Santa Clara	High Hazard	110 ft	1936	Earth	California
Almaden Valley Santa Clara	High Hazard	38 ft	1965	Earth	California
Almond Alameda	High Hazard	30 ft	1954	Earth	California
Almond Dam Steuben	High Hazard	90 ft	1949	Earth	New York
Almy Reservoir Providence	High Hazard	33 ft	1865	Rockfill	Rhode Island
Alnoname No.1 Tuscaloosa	High Hazard	—	1930	Earth	Alabama
Alpine Marin	High Hazard	143 ft	1917	Gravity	California
Alpine Dam Winnebago	High Hazard	48 ft	1942	Earth	Illinois
Alpine Lake Preston	High Hazard	35 ft	1971	Earth	West Virginia
Alpine Lake Dam Warren	High Hazard	118 ft	2000	Earth	Missouri
Alpine Lake Dam Rowan	High Hazard	—	1962	Earth	North Carolina
Alpine Main Alpine	High Hazard	49 ft	1891	Rockfill	California
Alta Loma Basin #1 San Bernardino	High Hazard	30 ft	1964	Earth	California
Alta Loma Basin #2 San Bernardino	High Hazard	22 ft	1971	Earth	California
Altamont Main Reservoir Dam Albany	High Hazard	37 ft	1898	Earth	New York
Althiser Lake Dam Callaway	High Hazard	25 ft	1967	Earth	Missouri
Altiers Lake Dam Perry	High Hazard	19 ft	1949	Earth	Ohio
Alto Lake Dam Lincoln	High Hazard	51 ft	1965	Earth	New Mexico
Alton Power Dam Belknap	High Hazard	16 ft	1923	Concrete	New Hampshire
Alton Reservoir Kane	High Hazard	—	—	Earth	Utah
Alton-Wood River Sportsmens Reservoir Dam Madison	High Hazard	33 ft	1948	Earth	Illinois
Altoona Eau Claire	High Hazard	44 ft	1938	Buttress	Wisconsin
Alto Pass Reservoir Dam Union	High Hazard	45 ft	1964	Earth	Illinois
Altus Kiowa	High Hazard	110 ft	1945	Concrete	Oklahoma