Significant Hazard Dams

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Dam Name	Hazard	Height	Built	Type	State
Twin Bridges Oklahoma	Significant Hazard	23 ft	1970	Earth	Oklahoma
Twin Creek Irrigation Company Sanpete	Significant Hazard	—	—	Earth	Utah
Twin Lake#1 Monroe	Significant Hazard	—	1962	Earth	Tennessee
Twin Lake #2 Monroe	Significant Hazard	—	1966	Earth	Tennessee
Twin Lake Dam St. Clair	Significant Hazard	15 ft	—	Earth	Illinois
Twin Lake Dam #1 Durham	Significant Hazard	—	1963	Earth	North Carolina
Twin Lakes Elk	Significant Hazard	18 ft	1936	Earth	Pennsylvania
Twin Lakes Kootenai	Significant Hazard	14 ft	2005	—	Idaho
Twin Lakes #1 Bledsoe	Significant Hazard	—	1969	Earth	Tennessee
Twin Lakes #2 Bledsoe	Significant Hazard	—	1969	Earth	Tennessee
Twin Lakes Business Park Dam #2 Mecklenburg	Significant Hazard	—	1958	Earth	North Carolina
Twin Lakes Dam Tyler	Significant Hazard	10 ft	1915	Earth	Texas
Twin Lakes Dam Caldwell	Significant Hazard	25 ft	—	Earth	Louisiana
Twin Lakes Dam Litchfield	Significant Hazard	20 ft	1900	Earth	Connecticut
Twin Lakes Dam Orangeburg	Significant Hazard	20 ft	1950	—	South Carolina
Twin Lakes Drive Dam Madison	Significant Hazard	—	1980	Earth	Illinois
Twin Lakes Lower Dam Edgefield	Significant Hazard	31 ft	—	—	South Carolina
Twin Lakes Reservoir Larimer	Significant Hazard	35 ft	1998	Earth	Colorado
Twin Lakes Upper Dam Spartanburg	Significant Hazard	34 ft	1964	—	South Carolina
Twin Lakes Upper Dam Edgefield	Significant Hazard	17 ft	1948	—	South Carolina
Twin Lakes Upper Dam Franklin	Significant Hazard	25 ft	1927	Earth	Ohio
Twin Lakes Upper Pond (Hoile Lane) Calvert	Significant Hazard	15 ft	1970	Earth	Maryland
Twin Springs McNairy	Significant Hazard	—	1977	Earth	Tennessee
Twin Valley Lakes - East Dam Johnson	Significant Hazard	50 ft	1965	Earth	Iowa
Twitchell Reservoir Dam New Haven	Significant Hazard	7 ft	—	Earth	Connecticut
T.W. Lyman Corson	Significant Hazard	19 ft	1940	Earth	South Dakota
Two Acre Pond Dam Fairfield	Significant Hazard	6 ft	—	Earth	Connecticut
Two Draw Lake Dam Garza	Significant Hazard	25 ft	1930	Earth	Texas
Tw Samuels Distillery Dam No 1 Nelson	Significant Hazard	19 ft	1940	Earth	Kentucky
Tw Samuels Distillery Dam No 2 Nelson	Significant Hazard	25 ft	1940	Earth	Kentucky
Tx No Name No 19 Dam Bexar	Significant Hazard	8 ft	1955	Earth	Texas
Tyann Tulsa	Significant Hazard	27 ft	1950	Earth	Oklahoma
Tyler Dam Washtenaw	Significant Hazard	31 ft	1942	Gravity	Michigan
Tyler Lake Susquehanna	Significant Hazard	6 ft	1919	Earth	Pennsylvania
Tyler Lake Dam Litchfield	Significant Hazard	6 ft	1880	Concrete	Connecticut
Tyler State Park Lake Dam Smith	Significant Hazard	50 ft	1936	Earth	Texas
Tyler Tree Farm Dam Grafton	Significant Hazard	25 ft	1969	Earth	New Hampshire
Tyson Fresh Meats Brine Pond 7 Walla Walla	Significant Hazard	—	1995	Earth	Washington
Tyson Fresh Meats Lagoons 1 2 3 Walla Walla	Significant Hazard	—	1980	Earth	Washington
Tyson Fresh Meats Pasco Brine Pond 8 Walla Walla	Significant Hazard	—	2010	Earth	Washington
Tyson Lagoon Dam - Cell 3 Madison	Significant Hazard	14 ft	1980	Earth	Nebraska
Tyson Lagoon Dam - Cell 4 Madison	Significant Hazard	14 ft	1980	Earth	Nebraska
Tyson Lagoon Dam - Cell 5 Madison	Significant Hazard	9 ft	1980	Earth	Nebraska
U 38 (Birdeye Dam) Crawford	Significant Hazard	51 ft	1988	Earth	Indiana
Udot - Pond 70a Salt Lake	Significant Hazard	—	—	Earth	Utah
Udot - Pond 90a Salt Lake	Significant Hazard	—	—	Earth	Utah
Uhls Greene	Significant Hazard	—	1999	Earth	Tennessee
Uke Ranch Lake Dam Ashland	Significant Hazard	29 ft	1968	Earth	Ohio
Ulmer Brook Hancock	Significant Hazard	10 ft	1981	Earth	Maine
Umbc Central Campus Dam Baltimore	Significant Hazard	10 ft	1975	Earth	Maryland