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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
Brague Pennsylvania Bradford 22 Low Not Rated 1970 Recreation
Lake Akiba Pennsylvania Monroe 22 High Poor 1926 Recreation
Thorn Run Pennsylvania Westmoreland 22 Low Satisfactory 1981 Grade Stabilization
Mill Club Pennsylvania Delaware 22 Significant Fair 1908 Recreation
Deer Valley Lake Pennsylvania Somerset 22 Low Not Rated 1953 Recreation
Spring Lake Pennsylvania Monroe 22 High Poor 1983 Recreation
Hidden Valley Pennsylvania Dauphin 22 High Fair 1931 Recreation
Knight Pennsylvania Montgomery 22 High Fair 1960 Recreation
Oakford Glen Pennsylvania Lackawanna 22 Significant Satisfactory — Recreation
Laurel Hill Creek Pennsylvania Somerset 22 Low Not Rated 1954 Water Supply
Millers Pond Pennsylvania Bradford 22 High Poor 1919 Recreation
Lake Sabula Pennsylvania Clearfield 22 Significant Satisfactory 1870 Recreation
Brier Hill #6 Pennsylvania Fayette 22 Significant Fair 1914 Flood Risk Reduction
Eidemiller Lake Pennsylvania Westmoreland 22 High Satisfactory 1992 Flood Risk Reduction
Eaton Reservoir Pennsylvania Erie 22 High Poor 1939 Water Supply
Mountain Lake Pennsylvania Somerset 22 High Fair 1956 Recreation
Musser Forests Pennsylvania Indiana 22 High Fair 1952 Irrigation
Mill Rift Pond Pennsylvania Pike 22 High Fair 1886 Recreation
Penn Scenic View Pond Pennsylvania Somerset 22 High Satisfactory — Recreation
Ash Basin No 1 Pennsylvania Snyder 22 High Fair 1949 Other
Pocono Mountain Water Forest Pennsylvania Pike 22 Significant Fair 1975 Recreation
Locust Ridge Hunting Club Pennsylvania Clinton 22 Significant Satisfactory 1965 Recreation
Pocono Mountain Lake Pennsylvania Pike 22 High Satisfactory 1973 Recreation
Mathay (Pa-459) Pennsylvania Mercer 22 High Fair 1962 Flood Risk Reduction
Lake May (Section F) Pennsylvania Adams 22 High Fair 1967 Recreation
Pine Hollow Detention Pennsylvania Allegheny 22 Significant Satisfactory 1999 Flood Risk Reduction
Erie Pool #9 Dam Pennsylvania Crawford 22 Low Satisfactory 1968 Fish and Wildlife Pond
Millers Pennsylvania Berks 21 High Fair 1975 Recreation
Kunkels Pennsylvania Schuylkill 21 Significant Poor 1870 Recreation
Ross Pennsylvania Susquehanna 21 Significant Fair 1974 Recreation
Brandonville Pumping Station Pennsylvania Schuylkill 21 Significant Unsatisfactory 1900 Recreation
Flat Rock Pennsylvania Philadelphia 21 Low Fair 1977 Recreation
Chalker Pennsylvania Susquehanna 21 High Satisfactory 1984 Recreation
Strodes Run Pennsylvania Mifflin 21 Low Not Rated 1946 Recreation
Pioneer Lake Pennsylvania Indiana 21 High Poor — Recreation
Laspina Lane Pennsylvania Westmoreland 21 Low Satisfactory 1952 Recreation
Klines Pennsylvania Columbia 21 Low Satisfactory 1885 Water Supply
Pine Run Flood Retarding Pennsylvania Montgomery 21 High Satisfactory 2014 Flood Risk Reduction
Sediment Basin No 4 Pennsylvania Lackawanna 21 Low Satisfactory 1989 Other
Big Boulder Lake A Pennsylvania Carbon 21 High Fair 1957 Recreation
W H Walker Pennsylvania Franklin 21 Low Not Rated 1930 Recreation
Seph Mack Pennsylvania Indiana 21 Significant Not Rated 1987 Recreation
Lower Woods Pond Pennsylvania Wayne 21 High Poor 1848 Recreation
Hidden Valley Pond No 1 Pennsylvania Somerset 21 High Fair 1987 Irrigation
North Arrowhead Lake Pennsylvania Monroe 21 High Satisfactory 1971 Recreation
Lake Courtland Pennsylvania Susquehanna 21 High Fair 1962 Recreation
Bathgate Detention Pond Pennsylvania Centre 21 High Fair 1991 Flood Risk Reduction
Crawford Lake Pennsylvania Monroe 21 High Satisfactory 1938 Recreation
Baxter Raw Water Basin Pennsylvania Philadelphia 21 Low Poor 1916 Water Supply
David Mine Equalization Pond No 3 Pennsylvania Armstrong 21 Significant Not Rated — 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.