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Browse Dams

3,540 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 3,540 dams from the NID database. Each record includes dam name, location, physical dimensions, hazard potential classification, condition assessment, purpose, owner information, and emergency action plan status. Use the filters below to search by state, hazard level, condition, or keyword.

Clear
Name State County Height (ft) Hazard Condition Year Purpose
Charles Mill Dam Ohio Ashland 52 High Not Available 1936 Flood Risk Reduction
Point Marion Lock and Dam Pennsylvania Greene 52 Significant Not Available 1959 Navigation
Robinson Tailings Pond #2 Dam Colorado Park 52 Significant Not Available — Tailings
Hennepin Ash Pond 2 Dam Illinois Putnam 52 Significant Not Available — Other
Opekiska Lock and Dam West Virginia Monongalia 52 Low Not Available 1967 Navigation
Happy Hollow Lake Dam Illinois Knox 52 Significant Not Available 1940 Recreation
Lincoln Trail State Park Lake Dam Illinois Clark 52 High Not Available 1956 Recreation
Tappan Dam Ohio Harrison 52 High Not Available 1936 Flood Risk Reduction
Red Bluff Diversion California Tehama 52 Low Not Available 1963 Irrigation
Craig Lake Dam Illinois Jersey 52 Low Not Available 1960 Recreation
DeGray Reregulation Dam Arkansas Clark 52 High Not Available 1971 Hydroelectric
Clear Creek Dam Virginia Bristol 51 High Not Available 1965 Flood Risk Reduction
Hancock Brook Dam - Railroad Dike Connecticut Litchfield 51 High Not Available 1966 Flood Risk Reduction
Dam No. 5n Kentucky Perry 51 Significant Not Available — Other
Hannibal Locks and Dam West Virginia Wetzel 51 Significant Not Available 1974 Navigation
OMID Regulating Reservoir Colorado Mesa 51 Low Not Available 2016
Lake Bloomington Dam Illinois McLean 51 Significant Not Available 1930 Water Supply
Trial Lake Dam Utah Summit 51 High Not Available 1990 Irrigation
Bay Creek Structure 5 Dam Illinois Pope 51 Significant Not Available 1976 Recreation
David D. Terry Lock and Dam Arkansas Pulaski 51 Significant Not Available 1968 Navigation
James W. Trimble Lock and Dam Arkansas Sebastian 51 Significant Not Available 1969 Navigation
Hollis Park Dam Illinois Peoria 51 High Not Available 1982 Recreation
Litchfield City Lake Dam Illinois Montgomery 51 High Not Available 1925 Recreation
Gridley Dam Illinois Cass 51 Low Not Available 1998 Recreation
Oso Diversion Dam Colorado Archuleta 51 Low Not Available 1970 Irrigation
Marble Bluff Dam Nevada Washoe 51 Low Not Available 1975 Other
Non Potable Reservoir Dam 1 Colorado El Paso 50 Significant Not Available 1961 Flood Risk Reduction
Impoundment No. 2 Alabama Cullman 50 Low Not Available — Water Supply
Fieldstone Subdivision Twin Dams-North Dam Illinois Adams 50 Low Not Available 2001 Recreation
Everett Dam - Dike P-1 New Hampshire Hillsborough 50 High Not Available 1961 Flood Risk Reduction
Horton Lake Dam Illinois Hancock 50 High Not Available 1967 Recreation
Slurry Pond No. 3 Alabama Jefferson 50 Low Not Available — Water Supply
Hamilton County Coal/Hamilton County/Coal Refuse 1 Dam Illinois Hamilton 50 Low Not Available — Other
Fresh Water Impoundment #2 Alabama Tuscaloosa 50 Low Not Available — Water Supply
Karl Lake Dam Illinois Mercer 50 Significant Not Available 1974 Recreation
Duck Creek Ash Pond 2 Dam Illinois Fulton 50 Low Not Available 1984 Other
Fish Lake Dam Oregon Jackson 50 High Not Available 1908 Flood Risk Reduction
McAlpine Locks and Dam Kentucky Jefferson 50 Significant Not Available 1964 Navigation
Hughes Hollow Slurry Imp. West Virginia Monongalia 50 High Not Available — Tailings
Non Potable Reservoir Dam 3 Colorado El Paso 50 High Not Available 1961 Irrigation
Knight Hawk/Prairie Eagle/North Refuse Area Dam Illinois Perry 50 Significant Not Available — Tailings
Vandalia Municipal Reservoir Dam Illinois Fayette 50 High Not Available 1965 Recreation
Pishkun Dike 1 Montana Teton 50 High Not Available 1930 Irrigation
Carlinville Lake II Dam Illinois Macoupin 50 Significant Not Available 1981 Water Supply
Fort Sumner Diversion Dam New Mexico De Baca 50 Low Not Available 1951 Irrigation
Palmyra-Modesto City Lake Dam Illinois Macoupin 50 Significant Not Available 1965 Water Supply
Flood Water Retarding Structure Site 30 Mississippi Holmes 50 Significant Not Available 2001 Other
Norris Slurry Impoundment Illinois Fulton 50 High Not Available 1955 Other
Green Leaf Lake Oklahoma Muskogee 50 Significant Not Available 1935 Fish and Wildlife Pond
Lopez Dam California Los Angeles 50 High Not Available 1954 Debris Control

Frequently Asked Questions

Hazard potential is based on the consequences of dam failure, not the condition of the dam. High hazard means loss of human life is probable. Significant means economic and environmental losses are expected but no probable loss of life. Low means minimal losses are expected. The classification considers downstream population, infrastructure, and environmental resources.

Condition ratings reflect the physical state of the dam based on periodic inspections. Satisfactory means no deficiencies found. Fair means minor issues exist but no immediate action needed. Poor means safety deficiencies require remedial action. Unsatisfactory means the dam is unsafe and immediate corrective action is required.

Yes. Use the search field above to find dams by name. You can also combine the search with state, hazard, and condition filters to narrow your results. Each dam record links to a detail page with complete information.