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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.

Name State County Height (ft) Hazard Condition Year Purpose
Heritage Reservation Pennsylvania Fayette 66 High Satisfactory 1979 Recreation
Kelsey Creek (Pa-600) Pennsylvania Tioga 66 High Satisfactory 1967 Flood Risk Reduction
Peace Valley (Pa-617) Pennsylvania Bucks 66 High Satisfactory 1973 Flood Risk Reduction
Banning Refuse Slurry Pond Pennsylvania Fayette 65 Significant Fair — Other
Pine Grove Pennsylvania Lancaster 65 High Fair 1949 Hydroelectric
Eberle (Pa-456) Pennsylvania Tioga 65 High Satisfactory 1964 Flood Risk Reduction
Hutchinson Fresh Water Pennsylvania Westmoreland 65 Low Not Rated — Recreation
Hibernia (Pa-436f) Pennsylvania Chester 65 High Fair 1994 Flood Risk Reduction
Lake Altoona Pennsylvania Blair 65 High Fair 1913 Water Supply
Pikes Creek Pennsylvania Luzerne 65 High Satisfactory 1911 Water Supply
Howells Run Pennsylvania Cambria 64 High Satisfactory 1964 Water Supply
Brooklyn Run (Pa-468) Pennsylvania Susquehanna 64 High Fair 1967 Flood Risk Reduction
Elmhurst Pennsylvania Lackawanna 64 High Satisfactory 1889 Water Supply
Washington No 4 Pennsylvania Washington 63 High Fair 1903 Recreation
Beechwood Lake (Pa-454) Pennsylvania Tioga 63 High Fair 1963 Flood Risk Reduction
Pa-479 Pennsylvania Washington 63 High Satisfactory 1969 Flood Risk Reduction
Montgomery Locks and Dam Pennsylvania Beaver 62 Significant Not Available 1936 Navigation
Ringtown No 5 Pennsylvania Schuylkill 62 High Poor 1914 Water Supply
Yellow Creek Pennsylvania Indiana 62 High Satisfactory 1969 Recreation
Falling Springs Pennsylvania Luzerne 61 Significant Satisfactory 1905 Recreation
Dalton Run Pennsylvania Somerset 61 High Poor 1905 Water Supply
Bellwood Pennsylvania Blair 61 High Poor 1902 Water Supply
Kern Run (Pa-638) Pennsylvania Snyder 61 High Satisfactory 1983 Water Supply
South Slurry Pond Pennsylvania Washington 60 Low Not Available — Tailings
William L. Cochran Impounding Pennsylvania Blair 60 High Satisfactory 1898 Water Supply
Glendale Pennsylvania Cambria 60 High Fair 1960 Flood Risk Reduction
Allegheny River Lock and Dam 8 Pennsylvania Armstrong 60 Low Not Available 1931 Navigation
Lake Antietam Pennsylvania Berks 60 High Satisfactory 1880 Water Supply
Roxbury Pennsylvania Franklin 60 High Fair — Water Supply
Lake Scranton Pennsylvania Lackawanna 60 High Satisfactory 1898 Water Supply
Bailey No. 5 Sedimentation Pond Pennsylvania Greene 60 High Satisfactory — Other
Sugar Run Pennsylvania Westmoreland 60 High Satisfactory 1907 Water Supply
Duck Pond Pennsylvania Washington 59 Significant Fair 1983 Other
Indspec No 3 Pennsylvania Butler 59 High Fair 1975 Grade Stabilization
Treated Water Pond Pennsylvania Washington 59 High Satisfactory 1966 Other
Warren H Ohl Pennsylvania Clinton 59 High Poor 1965 Water Supply
John C Smith Pennsylvania Bedford 59 High Poor 1932 Water Supply
Bailey Mine Area No. 6 Sed Pond Pennsylvania Greene 58 High Satisfactory — Other
Sawmill Run Pennsylvania Butler 58 High Fair 1968 Grade Stabilization
Lake Williams Pennsylvania York 58 High Poor 1912 Water Supply
North Fork (Pa-406) Pennsylvania Potter 58 High Fair 1960 Flood Risk Reduction
Allegheny River Lock and Dam 2 Pennsylvania Allegheny 58 Significant Not Available 1934 Navigation
Waste House No 1 Pennsylvania Schuylkill 57 High Satisfactory 1884 Water Supply
Holtwood Ses Ash Basin No 2 Pennsylvania Lancaster 57 High Fair 2000 Other
North Branch Dunlap Creek (Pa-470) Pennsylvania Fayette 57 High Satisfactory 1974 Recreation
Maxwell Locks and Dam Pennsylvania Washington 56 Significant Not Available 1964 Navigation
Leaser Lake Pennsylvania Lehigh 56 High Fair 1971 Recreation
Township Line Pennsylvania Westmoreland 56 High Poor 1900 Recreation
Kaercher Creek (Pa 478) Pennsylvania Berks 56 High Fair 1971 Recreation
Shawnee Lake Pennsylvania Bedford 56 High Fair 1950 Flood Risk Reduction

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.