High Hazard Dams

Loss of human life is likely if the dam fails.

Dam Name	Hazard	Height	Built	Type	State
Upper San Marcos River WS SCS Site 3 Hays	High Hazard	60 ft	1991	Earth	Texas
Upper San Marcos River WS SCS Site 4 Hays	High Hazard	99 ft	—	Earth	Texas
Upper Serenity Dam Montgomery	High Hazard	10 ft	1998	Earth	Texas
Upper Shaker Lake Dam Cuyahoga	High Hazard	30 ft	1852	Earth	Ohio
Upper Shepaug Dam Litchfield	High Hazard	90 ft	1965	Earth	Connecticut
Upper Sherando SCS 27 Augusta	High Hazard	59 ft	1958	Earth	Virginia
Upper Shuree Pond Dam Colfax	High Hazard	42 ft	1971	Earth	New Mexico
Upper Silver Lake Dam Oceana	High Hazard	25 ft	1964	Earth	Michigan
Upper Smith Dam Wood	High Hazard	48 ft	1955	Earth	West Virginia
Upper Spring Lake Dam Morgan	High Hazard	21 ft	1964	Earth	Indiana
Upper Stehly San Diego	High Hazard	29 ft	1999	Earth	California
Upper Stillwater Duchesne	High Hazard	285 ft	1986	Concrete	Utah
Upper Stoneville Reservoir Dam Worcester	High Hazard	27 ft	—	Rockfill	Massachusetts
Upper Stony Lake Dam Macomb	High Hazard	24 ft	1961	Gravity	Michigan
Upper Sunlight Lake Dam Kittitas	High Hazard	—	1967	Earth	Washington
Upper Sunny Hill Pond Dam Kershaw	High Hazard	19 ft	1969	—	South Carolina
Upper Sunshine Park	High Hazard	154 ft	1942	Earth	Wyoming
Upper Tanglewood Dam Cherokee	High Hazard	—	1974	Earth	North Carolina
Upper Tippah Watershed Structure Lt-6-17 Dam Tippah	High Hazard	26 ft	1962	Earth	Mississippi
Upper Toms Creek Nursery Dam Randolph	High Hazard	—	—	Earth	North Carolina
Upper Towaliga Reservoir Dam Spalding	High Hazard	45 ft	—	Earth	Georgia
Upper Tumbling Run Schuylkill	High Hazard	55 ft	1836	Earth	Pennsylvania
Upper Turtle River Flood Ret. 4 Grand Forks	High Hazard	52 ft	1980	Earth	North Dakota
Upper Turtle River Flood Ret. 5 Grand Forks	High Hazard	70 ft	1975	Earth	North Dakota
Upper Turtle River Flood Ret. 9 Grand Forks	High Hazard	68 ft	1979	Earth	North Dakota
Upper Twin Lake Mono	High Hazard	14 ft	1905	Earth	California
Upper Twin Mountain Lake Dam Pickens	High Hazard	36 ft	1955	Earth	Georgia
Upper Valle Mines Dam Jefferson	High Hazard	34 ft	1958	Other	Missouri
Upper Van Tassell Laramie	High Hazard	95 ft	1932	Earth	Wyoming
Upper Wabash Structure No. 3 Dam Mercer	High Hazard	28 ft	1963	Earth	Ohio
Upper Wallace Dam Augusta	High Hazard	37 ft	1967	Earth	Virginia
Upper West Deer Lake Allegheny	High Hazard	24 ft	—	Earth	Pennsylvania
Upper West Highland Lake Dam Sussex	High Hazard	13 ft	1958	Earth	New Jersey
Upper Wheeler Dam Chelan	High Hazard	—	1922	Earth	Washington
Upper Wheeler Saddle Dam Chelan	High Hazard	—	1992	Earth	Washington
Upper Wilcox Madera	High Hazard	48 ft	1930	Earth	California
Upper Wilson Pond Dam Cheshire	High Hazard	17 ft	1910	Earth	New Hampshire
Upper Windsor Lake Dam Richland	High Hazard	14 ft	1965	—	South Carolina
Upper Yockanookany WS Str 1 Dam Choctaw	High Hazard	25 ft	1975	Earth	Mississippi
Upper Yockanookany WS Str 2 Dam Choctaw	High Hazard	21 ft	1979	Earth	Mississippi
Upper Yockanookany WS Str 4 Dam Choctaw	High Hazard	27 ft	1979	Earth	Mississippi
Upper Yockanookany WS Str No 3 Dam Choctaw	High Hazard	18 ft	1975	Earth	Mississippi
Upper Yocona Watershed Structure Y-14-01 Dam Lafayette	High Hazard	28 ft	1965	Earth	Mississippi
Upper York Reservoir Dam York	High Hazard	20 ft	1926	—	South Carolina
Upriver Dam Spokane	High Hazard	38 ft	1937	Concrete	Washington
Us 36 Roadfill Dam/ Wigner Dam Rawlins	High Hazard	47 ft	1966	Earth	Kansas
Us 77 Roadfill Dam Marshall	High Hazard	37 ft	1960	Earth	Kansas
Us 77 Roadfill Dam Marshall	High Hazard	49 ft	1960	Earth	Kansas
Us 77 Road Fill Dam Riley	High Hazard	29 ft	1967	Earth	Kansas
Us Highway 81 Roadfill Dam Saline	High Hazard	29 ft	1967	Earth	Kansas