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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
Lake Mokoma Pennsylvania Sullivan 16 High Poor 1890 Recreation
Duck Harbor Pond Pennsylvania Wayne 16 High Fair 1907 Recreation
Donald Amick Pond Pennsylvania Bedford 16 Low Not Available 1967 Recreation
Mountain Lake Pennsylvania Luzerne 16 High Fair 1910 Recreation
Loch Alsh Reservoir Pennsylvania Montgomery 16 High Satisfactory 1915 Recreation
Blue Ridge Det Pennsylvania Butler 16 Significant Not Rated 1990 Flood Risk Reduction
Mcconnell Lake Pennsylvania Pike 16 Significant Fair 1957 Recreation
Andorra Springs Basin B Pennsylvania Montgomery 16 High Fair — Flood Risk Reduction
Orson Pond Pennsylvania Wayne 16 Significant Fair 1849 Recreation
Brier Crest Woods Pennsylvania Monroe 16 High Fair 1973 Recreation
Lake Jo-Ann Pennsylvania Washington 16 High Satisfactory 1950 Recreation
Rapp Run Flood Retarding Pennsylvania Montgomery 16 High Satisfactory 2014 Flood Risk Reduction
Remington Road Detention Pennsylvania Montgomery 16 High Fair 1979 Flood Risk Reduction
Lower West Deer Lake Pennsylvania Allegheny 16 High Satisfactory — Recreation
Horsham Towne Lower Pond Pennsylvania Montgomery 16 Significant Fair 1988 Flood Risk Reduction
Orchard Course No. 2 Impoundment Pennsylvania Butler 16 Low Not Rated 1994 Flood Risk Reduction
Middle West Deer Pennsylvania Allegheny 16 High Satisfactory — Recreation
Allegheny River Lock and Dam 5 Pennsylvania Armstrong 16 Low Not Available 1927
Mackiewicz Pennsylvania Tioga 15 Low Not Available 1969 Recreation
Quakake Pennsylvania Carbon 15 High Satisfactory 1897 Water Supply
Metroplex Pennsylvania Montgomery 15 Low Fair 1999 Flood Risk Reduction
Borg Dam Pennsylvania Tioga 15 High Not Available 1984 Recreation
Helvetia Pennsylvania Clearfield 15 Low Not Rated 1921 Recreation
Bear Pond Pennsylvania Westmoreland 15 Low Not Rated — Recreation
Lakevue Estates Pennsylvania Butler 15 Significant Not Rated — Other
Creek Pennsylvania Bucks 15 Low Fair — Recreation
Clairton Lake Pennsylvania Somerset 15 High Fair 1952 Recreation
Trostle Pond Pennsylvania Lackawanna 15 Significant Fair — Recreation
Anthonys Mill Pennsylvania Berks 15 Significant Fair 1927 Recreation
Rehfeldt Pennsylvania Bradford 15 Low Not Rated 1983 Other
Lake Lattimore Pennsylvania Pike 15 High Poor 1930 Recreation
Cold Stream Pennsylvania Centre 15 High Satisfactory 1889 Recreation
Lake Manjo Pennsylvania Luzerne 15 Low Fair 1932 Recreation
Spangenberg Lake Pennsylvania Lackawanna 15 Significant Fair 1949 Recreation
Billets Pond Pennsylvania Bradford 15 Low Not Rated — Recreation
Linden Lake Pennsylvania Fayette 15 Significant Poor 1955 Recreation
Mammoth Lake Pennsylvania Westmoreland 15 High Satisfactory 1969 Recreation
Jewell Pond Pennsylvania Greene 15 Significant Fair — Recreation
Mingo Lake Pennsylvania Susquehanna 15 Low Fair 1895 Recreation
Bucks Cove Pennsylvania Wayne 15 Low Poor — Recreation
Lake John Pennsylvania Sullivan 15 Low Not Rated 1958 Recreation
Walker Lake Pennsylvania Pike 15 High Satisfactory 1953 Recreation
Beaver Pond Pennsylvania Wayne 15 High Satisfactory 1909 Recreation
Lower Alford Lake Pennsylvania Susquehanna 15 High Poor 1919 Recreation
Cooks Pond Pennsylvania Bradford 15 High Fair 1997 Recreation
Manheim Twp Detention Basin No 2 Pennsylvania Lancaster 15 High Satisfactory 1981 Flood Risk Reduction
Ponderosa Pines Pennsylvania Wayne 15 High Fair 1970 Recreation
Rossiter Pennsylvania Indiana 15 High Poor 1919 Water Supply
Cresswell Lower Pennsylvania Mercer 15 Significant Not Rated 2002 Recreation
Maiden Creek Reservoir Pennsylvania Berks 15 Low Fair 1960 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.