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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
Surry Mountain Dam New Hampshire Cheshire 83 High Not Available 1941 Flood Risk Reduction
Robert S. Kerr Lock and Dam Oklahoma Le Flore 82 High Not Available 1970 Navigation
Rowdy Branch Dam Kentucky Perry 82 High Not Available — Other
John C. Stennis Lock and Dam Mississippi Lowndes 82 Significant Not Available 1980 Navigation
Fort Supply Dam Oklahoma Woodward 82 High Not Available 1942 Flood Risk Reduction
Unity Dam Oregon Baker 82 High Not Available 1938 Irrigation
Elk River Dam Tennessee Franklin 82 High Not Available — Flood Risk Reduction
Bardwell Dam Texas Ellis 82 High Not Available 1965 Flood Risk Reduction
D.O.E. Savannah River Pond C South Carolina Barnwell 82 Low Not Available 1957 Other
Lavon Dam Texas Collin 81 High Not Available 1952 Flood Risk Reduction
Jerry F. Costello Lock and Dam Illinois Randolph 81 Significant Not Available 1974 Navigation
Nickajack Dam Tennessee Marion 81 High Not Available 1967 Hydroelectric
Mill Creek Structure 1 Dam Illinois Clark 81 Significant Not Available 1980 Flood Risk Reduction
Lake McMaster Dam Illinois Knox 81 High Not Available 1981 Recreation
Bull Lake Dam Wyoming Fremont 81 High Not Available 1938 Flood Risk Reduction
Hillsboro Energy/Deer Run/CRD 1 Dam Illinois Montgomery 80 High Not Available — Tailings
Non Potable Reservoir Dam 4 Colorado El Paso 80 Low Not Available 1958 Flood Risk Reduction
Somerville Dam Texas Washington 80 High Not Available 1967 Flood Risk Reduction
Silt Pond California Ventura 80 High Not Available — Other
Long Branch Dam Missouri Macon 80 High Not Available 1978 Flood Risk Reduction
Slurry Impoundment No. 1 Alabama Tuscaloosa 80 Low Not Available —
Big Creek Diversion Dam Iowa Polk 80 High Not Available 1970 Flood Risk Reduction
Claiborne Lock and Dam Alabama Monroe 80 Significant Not Available 1971 Navigation
Silt Pond California Los Angeles 80 High Not Available — Other
Pond 11 California Santa Clara 80 High Not Available — Other
Illinois Power Company Lake Dam Illinois Vermilion 80 Low Not Available 1954 Recreation
Branched Oak Dam Nebraska Lancaster 80 High Not Available 1967 Flood Risk Reduction
H.K. Thatcher Lock and Dam Arkansas Union 80 Significant Not Available 1983 Navigation
Pond 3 California San Joaquin 80 High Not Available — Other
Funks Dam California Colusa 80 Low Not Available 1975 Irrigation
Kettle Creek Diversion Dam Colorado El Paso 80 High Not Available 1961 Flood Risk Reduction
Summersville Dam - Dike 1 West Virginia Nicholas 80 High Not Available 1965 Flood Risk Reduction
Lehigh Coal & Navigation CO - #14 Plant Pennsylvania Schuylkill 80 Significant Not Available — Tailings
Bowman-Haley Dam North Dakota Bowman 79 High Not Available 1967 Flood Risk Reduction
Mansfield Hollow Dam - Dike F Connecticut Tolland 78 High Not Available 1952 Flood Risk Reduction
Mansfield Hollow Dam - Dike C Connecticut Tolland 78 High Not Available 1952 Flood Risk Reduction
Apple Canyon Lake Dam Illinois Jo Daviess 78 High Not Available 1978 Recreation
Mansfield Hollow Dam - Dike D and E Connecticut Tolland 78 High Not Available 1952 Flood Risk Reduction
Mansfield Hollow Dam Connecticut Windham 78 High Not Available 1952 Flood Risk Reduction
Greenup Locks and Dam Kentucky Greenup 78 Significant Not Available 1962 Navigation
Lake George Dam Illinois Rock Island 78 High Not Available 1962 Recreation
Keene Creek Dam Oregon Jackson 78 High Not Available 1959 Hydroelectric
Mansfield Hollow Dam - Dike A and B Connecticut Tolland 78 High Not Available 1952 Flood Risk Reduction
Stillwater Dam Pennsylvania Susquehanna 77 High Not Available 1960 Flood Risk Reduction
D.O.E. Savannah River Steel Creek Dam South Carolina Barnwell 77 High Not Available 1986 Other
Melvin Price Locks and Dam Illinois St. Charles 77 Significant Not Available 1990 Navigation
Hillboro Energy/Deer Run/Crd 2 Dam Illinois Montgomery 77 High Not Available — Other
Knight Hawk/Prairie Eagle/Slurry 012c Dam Illinois Perry 77 Significant Not Available 2016 Other
Hopkinton Dam - Dike H-2 New Hampshire Merrimack 77 High Not Available 1962 Flood Risk Reduction
Murray Lock and Dam Arkansas Pulaski 77 Significant Not Available 1969 Navigation

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.