Flood Risk Reduction Dams

17,618 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Wilkinson Lake Dam Iredell	Low Hazard	—	1957	Earth	North Carolina
Willard Creek Debris Basin Box Elder	Significant Hazard	—	—	Earth	Utah
William H. Harsha Dam Clermont	High Hazard	—	1973	Rockfill	Ohio
William Leck Canadian	Low Hazard	30 ft	1978	Earth	Oklahoma
William L. Jess Dam Jackson	High Hazard	342 ft	1976	Rockfill	Oregon
William Robertson Dam Custer	Low Hazard	13 ft	1960	Earth	Nebraska
Williams Creek #4 Dam Clay	Low Hazard	46 ft	1969	Earth	Missouri
Williams Creek Watershed Dam 1 Clay	Low Hazard	34 ft	1971	Earth	Missouri
Williams Creek WS SCS Site 1 Dam Gillespie	High Hazard	46 ft	1968	Earth	Texas
Williams Creek WS SCS Site 2 Dam Gillespie	High Hazard	41 ft	1968	Earth	Texas
Williams Creek WS SCS Site 3 Dam Gillespie	High Hazard	50 ft	1967	Earth	Texas
Williams Creek WS SCS Site 4 Dam Gillespie	High Hazard	50 ft	1967	Earth	Texas
Williams Dam Spokane	Low Hazard	—	1982	Earth	Washington
Williams Dam Nuckolls	Low Hazard	20 ft	1959	Earth	Nebraska
Williams Lake Dam Burleson	Low Hazard	26 ft	1972	Earth	Texas
Williamson Dam Burt	Low Hazard	29 ft	2001	Earth	Nebraska
Williamson FRS Okeechobee	Low Hazard	6 ft	1989	Earth	Florida
Williamson Irrigation Dam Boyd	Low Hazard	31 ft	2016	Earth	Nebraska
Williams Pond Dam Lamar	Low Hazard	26 ft	1984	Earth	Texas
Willis River Dam #1a Buckingham	High Hazard	42 ft	1975	Earth	Virginia
Willis River Dam #1b Buckingham	Significant Hazard	43 ft	1975	Earth	Virginia
Willis River Dam #2 Buckingham	High Hazard	46 ft	1975	Earth	Virginia
Willis River Dam #4 Buckingham	High Hazard	44 ft	—	Earth	Virginia
Willis River Dam #5e Buckingham	High Hazard	42 ft	—	Earth	Virginia
Willis River Dam #5f Buckingham	High Hazard	43 ft	—	Earth	Virginia
Willis River Dam #6 Cumberland	High Hazard	47 ft	—	Earth	Virginia
Willis River Dam #6a Buckingham	High Hazard	33 ft	—	Earth	Virginia
Willis River Dam #7 Buckingham	Significant Hazard	38 ft	1969	Earth	Virginia
Willis River Dam #9 Buckingham	High Hazard	36 ft	—	Earth	Virginia
Will-O-B Douglas	Low Hazard	9 ft	1990	Earth	Minnesota
Willoughby Dam Cheyenne	Significant Hazard	27 ft	1963	Earth	Nebraska
Willow Oneida	High Hazard	35 ft	1927	Gravity	Wisconsin
Willow Creek Dam Elko	Low Hazard	58 ft	1986	Rockfill	Nevada
Willow Creek Dam Pierce	High Hazard	58 ft	1983	Earth	Nebraska
Willow Creek Dam Morrow	High Hazard	159 ft	1982	—	Oregon
Willow Creek Subwatershed Site 10-3 Woodbury	Low Hazard	34 ft	1968	Earth	Iowa
Willow Creek Subwatershed Site 3-1 Woodbury	Low Hazard	39 ft	1968	Earth	Iowa
Willow Creek Subwatershed Site M-1 Woodbury	Low Hazard	45 ft	1968	Earth	Iowa
Willow Creek Subwatershed Site M-2 Woodbury	Low Hazard	38 ft	1968	Earth	Iowa
Willow Creek Subwatershed Site M-3 Woodbury	Low Hazard	30 ft	1968	Earth	Iowa
Willow Creek Subwatershed Site M-4 Woodbury	Low Hazard	25 ft	1968	Earth	Iowa
Willow Creek Watershed Dam C- 1 Ray	Significant Hazard	25 ft	1972	Earth	Missouri
Willow Creek WS SCS Site 1 Dam Tom Green	Significant Hazard	38 ft	1979	Earth	Texas
Willow Creek WS SCS Site 2 Dam Tom Green	Significant Hazard	36 ft	1979	Earth	Texas
Willow Creek Wtrshd Site A-1 Ray	High Hazard	42 ft	1975	Earth	Missouri
Willow Cr-Park R Detdam#1 Pembina	Significant Hazard	24 ft	1968	Earth	North Dakota
Willow Higgins Reservoir Dam Cook	Significant Hazard	12 ft	—	Earth	Illinois
Willow Lake Dam San Patricio	Low Hazard	20 ft	1970	Earth	Texas
Willow Pond Dam Monroe	Significant Hazard	11 ft	1973	Earth	New York
Willow St. By-Pass Dam Norfolk	Low Hazard	12 ft	—	—	Massachusetts