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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.

Clear
Name State County Height (ft) Hazard Condition Year Purpose
Saddle Lake Pennsylvania Wyoming 24 High Satisfactory 1965 Recreation
Lakeshore Pennsylvania Erie 24 Significant Poor 1932 Recreation
Oak Tree Pennsylvania Mercer 24 Low Not Rated 1967 Recreation
Lake Florence Pennsylvania Wayne 24 Significant Fair 1948 Recreation
Laurel Highlands Baptist Camp Pennsylvania Somerset 24 High Fair 1982 Recreation
Lake Sinca Pennsylvania Monroe 24 High Fair 1969 Recreation
David Strongs Pennsylvania Erie 24 Low Not Rated — Recreation
Westinghouse Electric Pennsylvania Westmoreland 24 Low Not Rated — Water Supply
Glades Pennsylvania Butler 24 High Satisfactory 1974 Recreation
Fawn Lake Pennsylvania Pike 24 High Poor 1973 Recreation
Glencannon Pond Pennsylvania Washington 24 Significant Fair — Flood Risk Reduction
Suydam (Pa-418) Pennsylvania Wayne 24 High Satisfactory 1960 Flood Risk Reduction
Mountaintop Lake #1 Pennsylvania Monroe 24 High Fair 1993 Recreation
Smith and Ponzo Pennsylvania Washington 24 Significant Fair 1939 Recreation
Bakerton Pennsylvania Cambria 24 Significant Not Rated 1921 Water Supply
Great Stream Commons Lower Pennsylvania Union 24 Low Not Rated 2001 Flood Risk Reduction
University Park Airport Pond 1a Pennsylvania Centre 24 High Poor 1995 Flood Risk Reduction
Philadelphia Mills Pennsylvania Philadelphia 24 High Fair 1994 Flood Risk Reduction
Northmont Farms Basin #1 Pennsylvania Allegheny 24 High Satisfactory 1986 Flood Risk Reduction
Upper West Deer Lake Pennsylvania Allegheny 24 High Satisfactory — Recreation
Thomas Creek (Rc & D-105) Pennsylvania Susquehanna 24 High Satisfactory 1978 Flood Risk Reduction
Brookville Waterworks Pennsylvania Jefferson 24 Significant Satisfactory 1912 Water Supply
Hammond Lakes Pennsylvania Tioga 23 Low Not Available 1970 Fish and Wildlife Pond
Penn Nursery Pennsylvania Centre 23 High Poor 1972 Irrigation
Martins Pennsylvania Montgomery 23 High Fair 1886 Recreation
Reddon-Hall Pennsylvania Susquehanna 23 High Fair 1985 Recreation
Marcel Lake Pennsylvania Pike 23 High Fair 1961 Recreation
Lake Catalpa Pennsylvania Luzerne 23 High Fair 1860 Recreation
Whitetail C Pennsylvania Franklin 23 Significant Fair — Recreation
Lindy Lake Pennsylvania Susquehanna 23 High Satisfactory 1985 Recreation
Brace Brook Pennsylvania Wayne 23 Low Fair 1925 Recreation
Lower Lake Pennsylvania Pike 23 High Fair 1959 Recreation
Maple Lake Pennsylvania Lackawanna 23 High Fair 1893 Water Supply
Stoughton Lake Pennsylvania Somerset 23 Significant Satisfactory 1951 Recreation
Sheppard Pennsylvania Adams 23 Low Not Rated 1934 Recreation
Placid Lake Pennsylvania Carbon 23 High Poor 1963 Recreation
Green Valley Farms Pennsylvania Chester 23 Significant Fair 1963 Recreation
Lake Somerset Pennsylvania Somerset 23 High Poor 1956 Recreation
Orchard Hill Pennsylvania Washington 23 Significant Satisfactory 1965 Flood Risk Reduction
Washington School Pennsylvania Washington 23 High Fair 1976 Flood Risk Reduction
Pa-113 Pennsylvania Bradford 23 Low Not Rated 1980 Recreation
Upper Birchwood Lake Pennsylvania Pike 23 High Poor — Recreation
Lake Chrisann Pennsylvania Susquehanna 23 High Fair 1961 Recreation
Sonneborn (Witco) Reservoir Pennsylvania Butler 23 High Poor 1951 Grade Stabilization
Tamarack Lake A (Pa-461a) Pennsylvania Crawford 23 High Unsatisfactory 1962 Flood Risk Reduction
Beaver Meadows Pennsylvania Forest 22 Low Not Rated 1936 Fish and Wildlife Pond
Martindale Pennsylvania Cambria 22 High Poor 1910 Water Supply
Shawnee Lake Pennsylvania Monroe 22 High Satisfactory 1927 Recreation
Upper Pennsylvania Perry 22 Low Not Rated 1919 Recreation
Hart Pennsylvania Perry 22 Low Satisfactory 1978 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.