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Browse Dams

1,492 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 1,492 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.

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Name State County Height (ft) Hazard Condition Year Purpose
Harmar Refuse Bank Pennsylvania Allegheny 410 High Satisfactory 1957 Other
Little Blue Run Pennsylvania Beaver 400 High Fair 1977 Other
Cumberland No. 1 Slurry Pond 1 Pennsylvania Greene 380 High Satisfactory 1984 Other
Cumberland No. 2 Slurry Pond Pennsylvania Greene 370 High Satisfactory — Other
Bailey Mine Area No. 3 Slurry Pennsylvania Greene 337 High Satisfactory 2014 Other
Bailey No. 8 Slurry Impoundment Pennsylvania Greene 317 High Not Rated — Other
Bailey Mine Slurry Impoundment Pennsylvania Greene 315 High Satisfactory 1984 Other
Emerald No. 1 Main Valley Eastern Pennsylvania Greene 310 High Satisfactory — Other
Mathies Mine Refuse Area Pond #2 Pennsylvania Washington 300 High Fair 1982 Other
Emerald No. 2 Main Valley Eastern Pennsylvania Greene 270 High Satisfactory — Other
Muddy Run Main Dam Pennsylvania Lancaster 260 High Satisfactory 1967 Hydroelectric
Labelle Slurry Pond #3 Pennsylvania Fayette 245 High Satisfactory 1958 Other
Hughes Hollow Slurry Impoundment Pennsylvania Greene 245 High Satisfactory — Other
Francis E. Walter Dam Pennsylvania Luzerne 239 High Not Available 1961 Flood Risk Reduction
Raystown Dam Pennsylvania Huntingdon 225 High Not Available 1973 Flood Risk Reduction
Cornwall Tailings Pennsylvania Lebanon 200 High Fair 1961 Tailings
Weisner Hollow Slurry Pennsylvania Jefferson 192 High Fair — Other
Mine No 84 - Pond 6 Main Pennsylvania Washington 185 High Satisfactory 1980 Other
East Branch Dam Pennsylvania Elk 184 High Not Available 1952 Flood Risk Reduction
Youghiogheny Dam Pennsylvania Fayette 184 High Not Available 1944 Flood Risk Reduction
Cambria Slurry Pond #4 Pennsylvania Cambria 178 High Fair — Other
Beltzville Dam Pennsylvania Carbon 177 High Not Available 1969 Flood Risk Reduction
Kinzua Dam Pennsylvania Warren 177 High Not Available 1965 Flood Risk Reduction
George B Stevenson Pennsylvania Cameron 166 High Satisfactory 1956 Flood Risk Reduction
Alvin R. Bush Dam Pennsylvania Clinton 165 High Not Available 1962 Flood Risk Reduction
Bailey Mine Fresh Water Imp Pennsylvania Greene 164 High Satisfactory 1984 Grade Stabilization
Mahoning Creek Dam Pennsylvania Armstrong 162 High Not Available 1941 Flood Risk Reduction
Tionesta Dam Pennsylvania Forest 154 High Not Available 1940 Flood Risk Reduction
Russelton Slurry Pond No 3 Pennsylvania Allegheny 153 Low Satisfactory 1967 Other
Cowanesque Dam Pennsylvania Tioga 151 High Not Available 1980 Flood Risk Reduction
Penn Forest Pennsylvania Carbon 151 High Satisfactory 1998 Water Supply
Horne No 5 Slurry Pennsylvania Washington 146 High Satisfactory 1984 Other
Grace Mine Tailings Pennsylvania Berks 145 High Fair 1957 Recreation
Conemaugh Dam Pennsylvania Westmoreland 144 High Not Available 1952 Flood Risk Reduction
Crooked Creek Dam Pennsylvania Armstrong 143 High Not Available 1940 Flood Risk Reduction
Tioga Dam Pennsylvania Tioga 141 High Not Available 1978 Flood Risk Reduction
Prompton Dam Pennsylvania Wayne 140 High Not Available 1961 Flood Risk Reduction
Ash Basin No 2 Pennsylvania Snyder 136 High Fair 1955 Other
Watres Pennsylvania Lackawanna 135 High Satisfactory 1925 Water Supply
Laurel Creek Pennsylvania Mifflin 135 High Fair 1972 Water Supply
Wild Creek Pennsylvania Carbon 135 High Fair 1941 Water Supply
Kinzua Upper Reservoir Dike Pennsylvania Warren 135 High Satisfactory 1970 Hydroelectric
Robena Slurry Pond No 4 Pennsylvania Greene 135 Low Satisfactory 1955 Other
Curwensville Dam Pennsylvania Clearfield 131 High Not Available 1965 Flood Risk Reduction
Piney Pennsylvania Clarion 129 High Fair 1924 Hydroelectric
Christian E Siegrist Pennsylvania Schuylkill 125 High Satisfactory 1994 Water Supply
Hammond Dam Pennsylvania Tioga 122 High Not Available 1978 Flood Risk Reduction
Isabella Fresh Water Pennsylvania Fayette 122 Significant Fair — Grade Stabilization
Maple Creek Slurry Pond 1 Pennsylvania Washington 120 High Satisfactory 1973 Other
Fawn Mine #91 Refuse Impoundment Pennsylvania Butler 120 High Fair — Other

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.