Flood Risk Reduction Dams

17,618 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Anna Belle Tank Dam Potter	Low Hazard	27 ft	1962	Earth	Texas
Ann Road Detention Basin Dam Clark	High Hazard	20 ft	2007	Earth	Nevada
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
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 60-A Sheridan	Low Hazard	31 ft	1964	Earth	Nebraska
Antelope Creek Dam Lancaster	High Hazard	—	1962	Earth	Nebraska
Antelope Creek Dry Dam Richland	Low Hazard	10 ft	2001	Earth	North Dakota
Antelope Dam Jackson	Low Hazard	10 ft	1970	Earth	Colorado
Anthonis,E Lake Dam Franklin	High Hazard	30 ft	1965	Earth	Missouri
Anthon Subwatershed 1-2261 Woodbury	Significant Hazard	28 ft	1954	Earth	Iowa
Anthon Subwatershed M-4001 Woodbury	Low Hazard	28 ft	1954	Earth	Iowa
Anthon Subwatershed Site 2-2760 Woodbury	Low Hazard	25 ft	1954	Earth	Iowa
Anthony Arroyo Dam No. 1 Doña Ana	High Hazard	35 ft	1974	Earth	New Mexico
Anthony City Dam Harper	Low Hazard	31 ft	1935	Earth	Kansas
Antioch Reservoir Contra Costa	High Hazard	30 ft	1935	Earth	California
Antwine 1 Kay	Low Hazard	25 ft	1940	Earth	Oklahoma
Anzalduas Diversion Dam Hidalgo	High Hazard	23 ft	1960	Concrete	Texas
Aol Dam No. 1 Loudoun	Unknown	20 ft	—	Earth	Virginia
Aol Dam No. 2 Loudoun	Unknown	17 ft	—	Other	Virginia
Aowa Creek 1-2 Dixon	Low Hazard	45 ft	1972	Earth	Nebraska
Aowa Creek 12-17 Dixon	Low Hazard	37 ft	1997	Earth	Nebraska
Aowa Creek 12-3 Dixon	Low Hazard	27 ft	1985	Earth	Nebraska
Aowa Creek 12-8 Dixon	Low Hazard	41 ft	1972	Earth	Nebraska
Aowa Creek 1-3 Dixon	Significant Hazard	38 ft	1981	Earth	Nebraska
Aowa Creek 13-4a Dixon	Low Hazard	38 ft	1981	Earth	Nebraska
Aowa Creek 13-5 Dixon	Low Hazard	32 ft	1981	Earth	Nebraska
Aowa Creek 22-3 Dixon	Significant Hazard	45 ft	1981	Earth	Nebraska
Aowa Creek 23-2 Dixon	Low Hazard	31 ft	1986	Earth	Nebraska
Aowa Creek 23-5 Dixon	Low Hazard	29 ft	1988	Earth	Nebraska
Aowa Creek 31-1 Dixon	Low Hazard	38 ft	1972	Earth	Nebraska
Aowa Creek 31-20a Dixon	Significant Hazard	51 ft	2003	Earth	Nebraska
Aowa Creek 31-5 Dixon	Low Hazard	44 ft	1976	Earth	Nebraska
Aowa Creek 31-6 Dixon	Low Hazard	34 ft	1984	Earth	Nebraska
Aowa Creek 31-8 Dixon	Low Hazard	42 ft	1995	Earth	Nebraska
Aowa Creek 32-3a Dixon	Low Hazard	55 ft	2000	Earth	Nebraska
Aowa Creek 32-4a Dixon	Low Hazard	40 ft	1980	Earth	Nebraska
Aowa Creek 41-3 Dixon	Low Hazard	49 ft	1988	Earth	Nebraska
Aowa Creek 41-6 Dixon	Low Hazard	35 ft	1995	Earth	Nebraska
Aowa Creek 42-2 Dixon	Low Hazard	31 ft	1984	Earth	Nebraska
Aowa Creek 43-4 Dixon	Low Hazard	29 ft	1975	Earth	Nebraska
Aowa Creek 43-9a Dixon	Low Hazard	50 ft	1999	Earth	Nebraska
Aowa Creek 51-1a Dixon	Low Hazard	35 ft	1991	Earth	Nebraska
Aowa Creek 61-11a Dixon	Low Hazard	50 ft	1975	Earth	Nebraska
Aowa Creek 61-3 Dixon	Low Hazard	28 ft	1972	Earth	Nebraska
Aowa Creek 62-5a Dixon	Low Hazard	49 ft	1976	Earth	Nebraska
Aowa Creek 63-1a Dixon	Low Hazard	48 ft	1978	Earth	Nebraska
Aowa Creek 63-3 Dixon	Low Hazard	32 ft	1981	Earth	Nebraska