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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
Fawn Mine #91 Refuse Impoundment Pennsylvania Butler 120 High Fair — Other
Hobo Ventures Pennsylvania Washington 118 Low Fair —
Ash Basin No 3 Pennsylvania Snyder 117 High Fair 1971 Other
Saltlick Pennsylvania Cambria 116 High Satisfactory 1913 Water Supply
Robena Pond No 6 Pennsylvania Greene 115 Low Satisfactory 1980 Other
Maple Creek #3 Slurry Pond #1 Pennsylvania Washington 115 High Satisfactory — Other
Little Pine Creek Pennsylvania Lycoming 113 High Poor 1950 Flood Risk Reduction
Nockamixon Pennsylvania Bucks 112 High Fair 1973 Recreation
Long Pine Run Pennsylvania Adams 112 High Fair 1970 Water Supply
General Edgar Jadwin Dam Pennsylvania Wayne 110 High Not Available 1960 Flood Risk Reduction
Lake Marburg Pennsylvania York 107 High Satisfactory 1967 Other
Dehart Pennsylvania Dauphin 105 High Poor 1940 Water Supply
North Fork Pennsylvania Somerset 105 High Poor 1932 Water Supply
Trout Run Pennsylvania Berks 104 High Fair 1976 Water Supply
John C Youngman Pennsylvania Lycoming 101 High Fair 1951 Water Supply
Nesbitt Pennsylvania Lackawanna 101 High Satisfactory 1903 Water Supply
Blue Marsh Dam Pennsylvania Berks 100 High Not Available 1977 Flood Risk Reduction
Reading Anthracite CO - New St. Nicholas Breaker Pennsylvania Schuylkill 100 High Not Available — Water Supply
North Slurry Pond Pennsylvania Washington 100 Low Not Available — Tailings
Keystone Station Pennsylvania Armstrong 100 High Satisfactory 1965 Grade Stabilization
Mill Run Pennsylvania Blair 100 High Poor 1957 Water Supply
Quemahoning Pennsylvania Somerset 100 High Satisfactory 1912 Water Supply
Hankin Pennsylvania Chester 100 Low Fair 1989 Flood Risk Reduction
Foster Joseph Sayers Dam Pennsylvania Centre 100 High Not Available 1969 Flood Risk Reduction
West Newton Sludge Pennsylvania Westmoreland 99 Low Unsatisfactory — Other
Locust Creek (Pa-423) Pennsylvania Schuylkill 98 High Fair 1964 Flood Risk Reduction
Goose Pond Run (Pa-464) Pennsylvania Monroe 97 High Fair 1975 Flood Risk Reduction
J C Bacon Pennsylvania Beaver 96 High Fair 1956 Water Supply
Robinson Fork (Pa-647) Pennsylvania Washington 95 High Satisfactory 1977 Flood Risk Reduction
Leachate Equalization Impoundment Pennsylvania Elk 95 Low Not Rated 1992 Other
Indian Run Pennsylvania Schuylkill 94 High Satisfactory 1926 Water Supply
Lake Wynonah Pennsylvania Schuylkill 92 High Fair 1971 Recreation
Beaver Run Pennsylvania Westmoreland 92 High Satisfactory 1952 Water Supply
Thomas W Koon Pennsylvania Bedford 92 High Satisfactory 1932 Water Supply
Maple Creek Slurry Pond No 2 - A Pennsylvania Washington 91 High Satisfactory 1978 Other
Emerald No. 1 Back Valley Western Pennsylvania Greene 90 High Satisfactory — Other
Aylesworth Creek Dam Pennsylvania Lackawanna 90 High Not Available 1970 Flood Risk Reduction
Marsh Creek Reservoir (Pa-437) Pennsylvania Chester 90 High Fair 1973 Recreation
Woodcock Creek Dam Pennsylvania Crawford 90 High Not Available 1973 Flood Risk Reduction
Two Lick Creek Pennsylvania Indiana 90 High Satisfactory 1968 Grade Stabilization
Leavitt Branch (Pa-463) Pennsylvania Monroe 90 High Poor 1976 Flood Risk Reduction
Muddy Run Recreation Dam Pennsylvania Lancaster 90 Low Satisfactory 1967 Hydroelectric
Slurry Pond No. 1 Pennsylvania Greene 90 Low Not Available — Water Supply
Emerald No. 2 Back Valley Western Pennsylvania Greene 90 High Satisfactory — Other
Union City Dam Pennsylvania Erie 88 High Not Available 1971 Flood Risk Reduction
Sludge Bed No 6 Pennsylvania Butler 88 High Fair 1983 Other
Little Schuylkill River (Pa-422) Pennsylvania Schuylkill 87 High Satisfactory 1968 Flood Risk Reduction
Green Lane Reservoir Pennsylvania Montgomery 87 High Satisfactory 1957 Water Supply
H A Stewart Pennsylvania Westmoreland 86 High Fair 1920 Water Supply
Pa-486 Pennsylvania Washington 86 High Satisfactory 1979 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.