Flood Risk Reduction Dams

17,618 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Bitter Creek Subwatershed Site E-2 Woodbury	Low Hazard	34 ft	1996	Earth	Iowa
Bitter Creek Subwatershed Site E6-1 Ida	Low Hazard	34 ft	1995	Earth	Iowa
Bjerrum Dam York	Low Hazard	18 ft	1964	Earth	Nebraska
Black Arroyo Detention Dam Bernalillo	High Hazard	26 ft	1992	Earth	New Mexico
Black Brook Pl-566 Flood Control Dam Hampden	High Hazard	60 ft	1971	Earth	Massachusetts
Blackburn Kern	High Hazard	48 ft	1991	Earth	California
Blackburn Dam Morrill	Significant Hazard	27 ft	1961	Earth	Nebraska
Black Butte Dam Tehama	High Hazard	140 ft	1963	Earth	California
Black Creek Lake Dam Madison	Low Hazard	18 ft	2005	Earth	Mississippi
Black Creek Str Y-36-50 Holmes	Low Hazard	35 ft	1965	Earth	Mississippi
Black Creek Watershed Number 100 Dam Holmes	High Hazard	39 ft	1996	Earth	Mississippi
Black Hack Jr Hughes	Low Hazard	30 ft	1976	Earth	Oklahoma
Blackhawk-Kickapoo Project Crawford	Significant Hazard	45 ft	1974	Earth	Wisconsin
Black Hawk Lake Dam Sac	Significant Hazard	12 ft	1916	Earth	Iowa
Black Hill Basin Dam Custer	Low Hazard	44 ft	1974	Earth	Nebraska
Black Lake Dam Sullivan	Low Hazard	10 ft	1917	Masonry	New York
Black Mountain Detention Basin Dam Clark	High Hazard	40 ft	2000	Earth	Nevada
Black River Imp Pennington	Significant Hazard	14 ft	2022	Earth	Minnesota
Black Rock McKinley	High Hazard	—	1908	Earth	New Mexico
Black Rock Dam Litchfield	High Hazard	130 ft	1971	Rockfill	Connecticut
Blackwater Dam Merrimack	High Hazard	75 ft	1941	Gravity	New Hampshire
Blackwater Dam - Dodge Estate Dike Merrimack	High Hazard	18 ft	1941	Gravity	New Hampshire
Blackwater Dam - Little Hill Dike Merrimack	High Hazard	38 ft	1941	Gravity	New Hampshire
Black Watershed Structure Y-36-11 Dam Holmes	Low Hazard	33 ft	1963	Earth	Mississippi
Black Watershed Structure Y-36-12 Dam Holmes	Low Hazard	30 ft	1963	Earth	Mississippi
Black Watershed Structure Y-36-21 Dam Holmes	Low Hazard	38 ft	1963	Earth	Mississippi
Black Watershed Structure Y-36-23 Dam Holmes	Low Hazard	38 ft	1964	Earth	Mississippi
Black Watershed Structure Y-36-24 Dam Holmes	Low Hazard	33 ft	1965	Earth	Mississippi
Black Watershed Structure Y-36-25 Dam Holmes	Low Hazard	25 ft	1963	Earth	Mississippi
Black Watershed Structure Y-36-28 Dam Holmes	Low Hazard	33 ft	1965	Earth	Mississippi
Black Watershed Structure Y-36-37 Dam Holmes	Low Hazard	40 ft	1967	Earth	Mississippi
Black Watershed Structure Y-36-39 Dam Holmes	Low Hazard	35 ft	1967	Earth	Mississippi
Black Watershed Structure Y-36-40 Dam Holmes	Low Hazard	30 ft	1965	Earth	Mississippi
Black Watershed Structure Y-36-43 Dam Holmes	Low Hazard	30 ft	1965	Earth	Mississippi
Black Watershed Structure Y-36-48 Dam Holmes	Low Hazard	40 ft	1966	Earth	Mississippi
Black Watershed Structure Y-36-53 Dam Holmes	Low Hazard	43 ft	1964	Earth	Mississippi
Black Watershed Structure Y-36-54 Dam Holmes	Low Hazard	35 ft	1964	Earth	Mississippi
Black Watershed Structure Y-36-55 Dam Holmes	Low Hazard	31 ft	1964	Earth	Mississippi
Blackwells Mills Dam Somerset	Significant Hazard	20 ft	—	Earth	New Jersey
Black Wolff #3 Carter	Low Hazard	25 ft	1964	Earth	Montana
Blackwood Creek 11-A Hayes	High Hazard	59 ft	1992	Earth	Nebraska
Blackwood Creek 12-A Hayes	Low Hazard	68 ft	1988	Earth	Nebraska
Blackwood Creek 32-A Hitchcock	Low Hazard	33 ft	1985	Earth	Nebraska
Blackwood Creek 51-A Hayes	Low Hazard	39 ft	1985	Earth	Nebraska
Blackwood Creek 61-A Hayes	Low Hazard	37 ft	1983	Earth	Nebraska
Blackwood Creek 62-A Hayes	Low Hazard	40 ft	1985	Earth	Nebraska
Blackwood Creek 63-A Hayes	Low Hazard	55 ft	1989	Earth	Nebraska
Blackwood Creek 72-A Hayes	Low Hazard	45 ft	1989	Earth	Nebraska
Blackwood Creek P-3 Red Willow	Low Hazard	30 ft	1984	Earth	Nebraska
Blackwood Creek P-5 Red Willow	Low Hazard	32 ft	1981	Earth	Nebraska