High Hazard Dams

Loss of human life is likely if the dam fails.

Dam Name	Hazard	Height	Built	Type	State
Aegon Dam Linn	High Hazard	26 ft	1997	Earth	Iowa
Aepoalua Reservoir Kauai	High Hazard	33 ft	1915	Earth	Hawaii
Aepoeha Reservoir Kauai	High Hazard	42 ft	1913	Earth	Hawaii
Aepoekolu Reservoir Kauai	High Hazard	37 ft	1910	Earth	Hawaii
Aepo Reservoir Kauai	High Hazard	70 ft	1901	Earth	Hawaii
Aerated Stabilization Basin Dam Transylvania	High Hazard	—	1977	Earth	North Carolina
Aero Plantation Lake Dam 1 Union	High Hazard	—	1962	Earth	North Carolina
Aero Plantation Lake Dam 2 Union	High Hazard	—	1967	Earth	North Carolina
Affolter Lake Dam Phelps	High Hazard	30 ft	1965	Earth	Missouri
Agate Jackson	High Hazard	77 ft	1965	Rockfill	Oregon
Agency Valley Malheur	High Hazard	110 ft	1934	Earth	Oregon
Agnes Lake Beaverhead	High Hazard	13 ft	1928	Earth	Montana
Agnew Hamilton	High Hazard	—	1961	Earth	Tennessee
Agnew Lake Mono	High Hazard	30 ft	1916	Concrete	California
Agua Chinon Orange	High Hazard	41 ft	1998	Earth	California
Ahren & Droege Dd No 3 Osage	High Hazard	27 ft	1958	Earth	Kansas
Aii Reservoir Kauai	High Hazard	21 ft	1920	Earth	Hawaii
Aiken Outing Club Dam Aiken	High Hazard	24 ft	1960	—	South Carolina
Aikman Gem	High Hazard	77 ft	1999	—	Idaho
Airport Storage Pond Sonoma	High Hazard	22 ft	1985	Earth	California
Airport Storage Pond 2 Sonoma	High Hazard	20 ft	1989	Earth	California
Airstrip Reservoir Dam Jersey	High Hazard	55 ft	1957	Earth	Illinois
Ajies Dam Structure 2a Añasco	High Hazard	52 ft	1984	Earth	Puerto Rico
Alamo Arroyo WS SCS Site 1 Dam Hudspeth	High Hazard	32 ft	1960	Earth	Texas
Alamo Arroyo WS SCS Site 3 Dam Hudspeth	High Hazard	47 ft	1960	Earth	Texas
Alamo Dam Mohave	High Hazard	283 ft	1968	Earth	Arizona
Alamoosook Lake Hancock	High Hazard	15 ft	1930	Concrete	Maine
Albemarle Dam Cleveland	High Hazard	—	1951	Earth	North Carolina
Albemarle Dam Albemarle	High Hazard	32 ft	—	Earth	Virginia
Albeni Falls Dam Bonner	High Hazard	—	1955	Concrete	Idaho
Alberta Park Mineral	High Hazard	32 ft	1953	Earth	Colorado
Alberty Dam Surry	High Hazard	—	—	Earth	North Carolina
Al Beshears Dam Wilkes	High Hazard	—	—	Earth	North Carolina
Albin Lake Dam Putnam	High Hazard	21 ft	1937	Earth	Indiana
Albin Pond Dam Attala	High Hazard	10 ft	—	Earth	Mississippi
Albion Reservoir Dam White	High Hazard	49 ft	2009	Earth	Arkansas
Alcona Alcona	High Hazard	60 ft	1924	Gravity	Michigan
Alcova Natrona	High Hazard	265 ft	1937	Earth	Wyoming
Alcove Dam Albany	High Hazard	80 ft	1929	Earth	New York
Alder Pierce	High Hazard	285 ft	1945	Concrete	Washington
Alder Marsh Wayne	High Hazard	10 ft	1948	Earth	Pennsylvania
Alder Pond Oneida	High Hazard	15 ft	1850	Earth	New York
Aldrich Branch Slurry Impoundment Mingo	High Hazard	560 ft	—	Earth	West Virginia
Alec Chaplin Dam Orangeburg	High Hazard	19 ft	1930	—	South Carolina
Alessandro Riverside	High Hazard	66 ft	1956	Earth	California
Alessi Flood Control Dam Huerfano	High Hazard	29 ft	1970	Earth	Colorado
Alexander Lincoln	High Hazard	38 ft	1913	Gravity	Wisconsin
Alexander Kauai	High Hazard	119 ft	1931	Earth	Hawaii
Alexander Lake Dam Tioga	High Hazard	12 ft	1965	Earth	New York
Alisal Creek Santa Barbara	High Hazard	93 ft	1971	Earth	California