High Hazard Dams

Loss of human life is likely if the dam fails.

Dam Name	Hazard	Height	Built	Type	State
Amsterdam Valley Retention Basin Dam Kenton	High Hazard	30 ft	—	Earth	Kentucky
Ana Mariaâ Ii Dam Ponce	High Hazard	40 ft	1939	Earth	Puerto Rico
Ana Mariaâ V Dam Ponce	High Hazard	53 ft	1939	Earth	Puerto Rico
Anawalt Lake Dam McDowell	High Hazard	34 ft	—	Earth	West Virginia
Anchor Hot Springs	High Hazard	208 ft	1959	Concrete	Wyoming
Anchor Lake Dam Pearl River	High Hazard	24 ft	1965	Earth	Mississippi
Anchor South Dam Beaverhead	High Hazard	11 ft	1904	Earth	Montana
Andale Frd No A-2 Sedgwick	High Hazard	18 ft	1963	Earth	Kansas
Anderson Santa Clara	High Hazard	240 ft	1950	Rockfill	California
Anderson Creek Clearfield	High Hazard	42 ft	1903	Earth	Pennsylvania
Anderson Dam Kanawha	High Hazard	39 ft	1984	Earth	West Virginia
Anderson Lake Dam Carroll	High Hazard	15 ft	1965	Earth	Missouri
Anderson Lake Dam Madison	High Hazard	23 ft	—	Earth	Mississippi
Anderson Lake Dam Randolph	High Hazard	25 ft	—	Earth	Missouri
Anderson Lake Dam Yazoo	High Hazard	30 ft	—	Earth	Mississippi
Anderson Lake Dam Jefferson	High Hazard	26 ft	1958	Earth	Missouri
Anderson Lake Dam Mason	High Hazard	—	1966	Earth	Washington
Anderson Pond Dam Anderson	High Hazard	39 ft	1952	—	South Carolina
Anderson Ranch Elmore	High Hazard	456 ft	1946	Earth	Idaho
Andersons Pond Dam Barnwell	High Hazard	15 ft	1940	—	South Carolina
Andorra Springs Basin B Montgomery	High Hazard	16 ft	—	Earth	Pennsylvania
Andrew Cademartori Calaveras	High Hazard	80 ft	1983	Earth	California
Andrew Jackson St Pk Lake Lancaster	High Hazard	27 ft	1968	—	South Carolina
Andrew Lake Dam Henderson	High Hazard	28 ft	—	—	Texas
Andrews Water Supply Dam Cherokee	High Hazard	—	1986	Earth	North Carolina
Angel Park North Detention Basin Dam Clark	High Hazard	55 ft	1985	Earth	Nevada
Angel Park South Detention Basin Dam Clark	High Hazard	13 ft	1982	Earth	Nevada
Angostura Fall River	High Hazard	193 ft	1949	Concrete	South Dakota
Angwin Napa	High Hazard	35 ft	1967	Earth	California
Anich Dam Franklin	High Hazard	38 ft	2003	Earth	Missouri
Anita Dam Blaine	High Hazard	—	1995	Gravity	Montana
Ankar Lake Dam (Shallow) Franklin	High Hazard	25 ft	1962	Earth	Missouri
Annadel No. 1 Sonoma	High Hazard	67 ft	1956	Earth	California
Anne Parks Short Branch Dam Greenville	High Hazard	26 ft	1953	—	South Carolina
Ann Road Detention Basin Dam Clark	High Hazard	20 ft	2007	Earth	Nevada
Anschutz Upstream Dam Madison	High Hazard	20 ft	1952	Earth	Missouri
Anson County Wwtp Lower Dam (Sludge Lagoon) Anson	High Hazard	—	1970	Earth	North Carolina
Anson County Wwtp Upper Dam (Sludge Lagoon) Anson	High Hazard	—	1970	Earth	North Carolina
Anson North Lake Dam Jones	High Hazard	37 ft	1941	Earth	Texas
Anson South Lake Dam Jones	High Hazard	25 ft	1920	Earth	Texas
Antelope Plumas	High Hazard	113 ft	1964	Earth	California
Antelope Todd	High Hazard	—	1939	Concrete	South Dakota
Antelope Malheur	High Hazard	56 ft	1923	Earth	Oregon
Antelope Kern	High Hazard	57 ft	1987	Earth	California
Antelope Creek 20-A Sheridan	High Hazard	24 ft	1964	Earth	Nebraska
Antelope Creek 40-B Sheridan	High Hazard	32 ft	1964	Earth	Nebraska
Antelope Creek Dam Ottawa	High Hazard	29 ft	1961	Earth	Kansas
Antelope Creek Dam Lancaster	High Hazard	—	1962	Earth	Nebraska
Antero Park	High Hazard	39 ft	1909	Earth	Colorado
Anthonis,E Lake Dam Franklin	High Hazard	30 ft	1965	Earth	Missouri