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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
Big Elk Lake Pennsylvania Susquehanna 12 Significant Fair 1860 Recreation
Erie Pool #4 Dam Pennsylvania Crawford 12 Low Fair 1980 Fish and Wildlife Pond
Upper Pennsylvania Northampton 11 Low Fair 1917 Recreation
Huggy Bear Lake Pennsylvania Pike 11 Significant Poor — Recreation
Wanzo Pennsylvania Bradford 11 Low Not Rated — Recreation
Whipporwill Pennsylvania Schuylkill 11 Significant Satisfactory — Recreation
Sullivan Pennsylvania Sullivan 11 Low Not Rated 1948 Recreation
Decker Swamp Pennsylvania Pike 11 Low Poor 1951 Recreation
Sprint Lake Pennsylvania Pike 11 Low Fair — Recreation
Wicks Pennsylvania Pike 11 Low Fair 1931 Recreation
Leopard Lake Pennsylvania Chester 11 High Fair — Recreation
Shawnee Pond Pennsylvania Monroe 11 Significant Satisfactory 2008 Water Supply
Lake Henry Pennsylvania Wayne 11 High Fair 1865 Recreation
Needle Pennsylvania Lackawanna 11 Low Poor 1974 Recreation
Black Rock Pennsylvania Montgomery 11 Low Satisfactory 1900 Water Supply
Lake Paupackan Pennsylvania Wayne 11 High Satisfactory 1914 Recreation
Reflection Lake (Romosa Lake) Pennsylvania Susquehanna 11 Low Poor 1952 Recreation
Kessler Pennsylvania York 11 Low Not Rated 1937 Grade Stabilization
Polk Pond Pennsylvania Susquehanna 11 Low Fair 1996 Recreation
Rocky Spring Dam Pennsylvania Franklin 11 Undetermined Not Rated 1967 Recreation
Ashley Furniture Pennsylvania Berks 11 Undetermined Not Rated 1991 Flood Risk Reduction
Alpine Lake Pennsylvania Monroe 11 Low Not Rated 1962 Recreation
Pocono Laurel Lake Pennsylvania Monroe 11 Significant Fair — Recreation
Foster Pond Pennsylvania Sullivan 11 Low Not Rated — Recreation
Brook Crossing Detention Pennsylvania Chester 11 Significant Fair — Flood Risk Reduction
Elk Lake Pennsylvania Wayne 11 High Satisfactory 1865 Recreation
Mcdowell Detention Basin Pennsylvania Erie 11 High Satisfactory 2004 Flood Risk Reduction
Jennings Pond Pennsylvania Wyoming 11 High Poor 1900 Recreation
Clear Lake Pennsylvania Crawford 11 Significant Not Rated 1855 Recreation
Tink Wig Lake Pennsylvania Pike 11 Significant Fair 1968 Recreation
Fairways Lower Pennsylvania Bucks 11 High Satisfactory 1989 Flood Risk Reduction
Cold Storage Pennsylvania Perry 11 Significant Satisfactory — Recreation
Rock Airport Pennsylvania Allegheny 11 Significant Fair — Recreation
Mill Creek Detention Basin Pennsylvania Montgomery 11 High Fair 1986 Flood Risk Reduction
Analomink Lake Pennsylvania Monroe 11 Significant Satisfactory 1910 Recreation
Woods Edge - Pond A Pennsylvania Lancaster 11 Low Not Rated — Flood Risk Reduction
Queen Esther Lake Pennsylvania Bradford 11 Significant Not Rated 1972 Recreation
Children's Lake Pennsylvania Cumberland 11 Significant Unsatisfactory — Recreation
Berlin Road Detention Basin Pennsylvania Westmoreland 11 High Satisfactory 2003 Flood Risk Reduction
Pngc Reservoir No 6 Pennsylvania Allegheny 11 High Satisfactory — Irrigation
East Birchwood Lake Pennsylvania Pike 11 High Satisfactory 2006 Recreation
Erie Pool K Dam Pennsylvania Crawford 11 Low Poor 1971 Fish and Wildlife Pond
Pond C Pennsylvania Cumberland 10 Undetermined Not Rated — Tailings
Wood Pennsylvania Bradford 10 Significant Not Rated — Recreation
Stookey Pennsylvania Wayne 10 Significant Fair — Recreation
Basin 2 Pennsylvania York 10 High Satisfactory 1998 Flood Risk Reduction
Lake Greeley Pennsylvania Pike 10 High Satisfactory 1916 Recreation
Williams Pond Pennsylvania Wayne 10 Low Fair 1930 Recreation
Gumble Brothers Pennsylvania Pike 10 Low Poor 1950 Recreation
William Penn Pennsylvania Pike 10 Low Fair 1916 Recreation

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.