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
Thornton Lake Jefferson	Significant Hazard	—	1920	Earth	Alabama
Thornton Lake Dam Deer Lodge	Significant Hazard	11 ft	1904	Rockfill	Montana
Thornwood Commons Pond Dam Strafford	Significant Hazard	16 ft	1961	Earth	New Hampshire
Thorson Group North Houston	Significant Hazard	28 ft	1963	Earth	Minnesota
Thorson Group West Houston	Significant Hazard	29 ft	1963	Earth	Minnesota
Thousand Oaks White	Significant Hazard	—	1967	Earth	Tennessee
Thread Lake Dam Genesee	Significant Hazard	9 ft	1973	Gravity	Michigan
Three Creek Deschutes	Significant Hazard	21 ft	—	Earth	Oregon
Three Creeks Natural Area Clackamas	Significant Hazard	14 ft	—	Earth	Oregon
Three Lakes Wasatch	Significant Hazard	—	1961	Earth	Utah
Three Mile and Sulfur Draw WS SCS Site 1 Dam Culberson	Significant Hazard	79 ft	1985	Earth	Texas
Threemile Pond Berkshire	Significant Hazard	17 ft	1968	Earth	Massachusetts
Three Mile Reservoir Dam Union	Significant Hazard	63 ft	1995	Earth	Iowa
Three Mile River #1 Dam Bristol	Significant Hazard	13 ft	1943	Rockfill	Massachusetts
Three Toes Morgan	Significant Hazard	—	—	Earth	Utah
Thrushwood Lake Dam Fairfield	Significant Hazard	12 ft	—	Earth	Connecticut
Thunder Bay Lake Dam Polk	Significant Hazard	19 ft	2010	Earth	Iowa
Thunderbird Lake Dam Sullivan	Significant Hazard	27 ft	1957	Earth	Indiana
Thundergust Pond Dam Salem	Significant Hazard	13 ft	—	Earth	New Jersey
Thunder Hollow Union	Significant Hazard	—	1974	Earth	Tennessee
Thurber Lake No 2 Dam Erath	Significant Hazard	24 ft	1959	Earth	Texas
Thurston Lake Prowers	Significant Hazard	16 ft	1928	Earth	Colorado
Ticer Branch Dam Mecklenburg	Significant Hazard	—	—	Earth	North Carolina
Tierney Dam Keokuk	Significant Hazard	14 ft	2002	—	Iowa
Tiffany Brook Pond Dam Middlesex	Significant Hazard	4 ft	—	Earth	Connecticut
Tiger Cat Sawyer	Significant Hazard	18 ft	1937	Gravity	Wisconsin
Tiger Creek Regulator Amador	Significant Hazard	110 ft	1931	Concrete	California
Tigue Lake Dam Montgomery	Significant Hazard	25 ft	1978	Earth	Arkansas
Tihonet Pond #1 Dam Plymouth	Significant Hazard	16 ft	—	Earth	Massachusetts
Tihonet Pond #2 Dam Plymouth	Significant Hazard	26 ft	—	Earth	Massachusetts
Tillatoba Creek WS Str Y-17b-06 Dam Yalobusha	Significant Hazard	23 ft	1981	Earth	Mississippi
Tillford Bedford	Significant Hazard	—	1963	Earth	Tennessee
Tilson Dam Buncombe	Significant Hazard	—	—	Earth	North Carolina
Timber Chester	Significant Hazard	19 ft	1986	Earth	Pennsylvania
Timber Creek Condo Montgomery	Significant Hazard	10 ft	1985	Earth	Pennsylvania
Timber Hills Lake Bourbon	Significant Hazard	35 ft	2006	Earth	Kansas
Timber Lake Clackamas	Significant Hazard	46 ft	—	Earth	Oregon
Timber Lake Washington	Significant Hazard	17 ft	1990	Earth	Pennsylvania
Timber Lake Dam Madison	Significant Hazard	20 ft	1970	Earth	Illinois
Timber Lake Dam Smith	Significant Hazard	31 ft	1947	Earth	Texas
Timber Lake Dam St. Clair	Significant Hazard	20 ft	—	Earth	Illinois
Timber Lake Dam Carroll	Significant Hazard	25 ft	1960	Earth	Illinois
Timber Lake Dam Fairfield	Significant Hazard	14 ft	1957	Earth	Connecticut
Timber Lake Dam Liberty	Significant Hazard	12 ft	1974	Earth	Texas
Timberlake Dam A Wake	Significant Hazard	—	—	Earth	North Carolina
Timberlake Dam B Wake	Significant Hazard	—	1966	Earth	North Carolina
Timberlake Dam C Wake	Significant Hazard	—	1955	Earth	North Carolina
Timberlake No. 1 Dam Franklin	Significant Hazard	48 ft	—	Earth	Ohio
Timberlake Phase 5 Tarrant	Significant Hazard	12 ft	1995	Concrete	Texas
Timber Lakes Estate Dam Scott	Significant Hazard	57 ft	2000	Earth	Iowa