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
Afton Reservoir Dam Union	Significant Hazard	51 ft	1936	Earth	Iowa
Agfa Lake Dam Broome	Significant Hazard	10 ft	—	Earth	New York
Agnes Sisson Recreational Pond Dam Schoharie	Significant Hazard	18 ft	1966	Earth	New York
Agreserves Plymouth Wastewater Storage Pond Benton	Significant Hazard	—	2023	—	Washington
Agrinw Feedlot Fresh Water Pond Benton	Significant Hazard	—	—	—	Washington
Agrinw Spaw Pond Benton	Significant Hazard	—	—	—	Washington
Ahlberg Pond Dam Tolland	Significant Hazard	13 ft	—	Concrete	Connecticut
Ahrens Lake Dam Richland	Significant Hazard	34 ft	1976	Earth	Ohio
Aiken Reservoir Dam Aiken	Significant Hazard	45 ft	1983	—	South Carolina
Airfield Pond Dam Sussex	Significant Hazard	10 ft	—	Earth	Virginia
Airlie Dam Fauquier	Significant Hazard	19 ft	—	Earth	Virginia
Airport Reservoir D Sonoma	Significant Hazard	45 ft	2002	Earth	California
A.I. Selden Lock and Dam Greene	Significant Hazard	—	1958	Gravity	Alabama
Aitken Lake Dam Parke	Significant Hazard	31 ft	1973	Earth	Indiana
A.J. Dean Concrete Sediment Pond Salt Lake	Significant Hazard	—	—	Earth	Utah
Ajello'S Pond New Haven	Significant Hazard	5 ft	—	—	Connecticut
Aj Rod Dam Bastrop	Significant Hazard	37 ft	1965	Earth	Texas
Akers Sumner	Significant Hazard	—	1960	Earth	Tennessee
Akers & Tarr Weld	Significant Hazard	38 ft	1918	Earth	Colorado
Akron Reservoir Dam Genesee	Significant Hazard	45 ft	1927	Earth	New York
Akutan Hydro Dam Aleutians East Borough	Significant Hazard	21 ft	1993	Earth	Alaska
Albers Lake Dam Clinton	Significant Hazard	7 ft	2000	Earth	Illinois
Alberti Forman Dam Hartford	Significant Hazard	8 ft	—	Concrete	Connecticut
Albia Reservoir Dam Monroe	Significant Hazard	40 ft	1938	Earth	Iowa
Albion Dam Calhoun	Significant Hazard	11 ft	1856	Gravity	Michigan
Albion Lake Boulder	Significant Hazard	36 ft	1913	Concrete	Colorado
Albion Waste Gate & Weir Dam Orleans	Significant Hazard	26 ft	1911	Concrete	New York
Albright Bridge Dam Preston	Significant Hazard	8 ft	1950	Concrete	West Virginia
Alcorn Dam Dawes	Significant Hazard	15 ft	1935	Earth	Nebraska
Alcyon Lake Dam Gloucester	Significant Hazard	12 ft	1943	Earth	New Jersey
Aldebaran Pondera	Significant Hazard	35 ft	1920	Earth	Montana
Alden Lake Dam DeSoto	Significant Hazard	15 ft	—	Earth	Mississippi
Alden Pond Dam Fairfield	Significant Hazard	10 ft	—	Masonry	Connecticut
Aldon Mill Pond Dam Tolland	Significant Hazard	25 ft	1920	Masonry	Connecticut
Aldrich Lake Dam Hampshire	Significant Hazard	34 ft	1934	Concrete	Massachusetts
Aleck Meadow Reservoir Dam Orange	Significant Hazard	23 ft	1956	Earth	New York
Alexander Pond Dam Butler	Significant Hazard	—	—	Earth	Alabama
Alexander Pond Dam Bond	Significant Hazard	—	1973	Rockfill	Illinois
Alexander Wildlife Club Pond Dam Alexander	Significant Hazard	—	—	Earth	North Carolina
Alex. City State Jr. College Tallapoosa	Significant Hazard	—	1966	Earth	Alabama
Algol Toole	Significant Hazard	20 ft	1959	Earth	Montana
Algonkin Dam Salem	Significant Hazard	14 ft	1924	Earth	New Jersey
Algonquin Dam McHenry	Significant Hazard	9 ft	1947	Concrete	Illinois
Algonquin Lake Dam Barry	Significant Hazard	14 ft	1927	Earth	Michigan
Alice Cumberland	Significant Hazard	—	1963	Earth	Tennessee
Al Jacobi Dam Escambia	Significant Hazard	16 ft	1958	Earth	Florida
Alkek Lake No 1 Dam Bandera	Significant Hazard	36 ft	1960	Earth	Texas
Alkek Lake No 2 Dam Bandera	Significant Hazard	27 ft	1940	Earth	Texas
All American Sports City INC Rec Dam Dutchess	Significant Hazard	17 ft	1966	Earth	New York
Allamuchy Pond Dam Warren	Significant Hazard	13 ft	—	Earth	New Jersey