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 |
| Long Pine Run | Pennsylvania | Adams | 112 | High | Fair | 1970 | Water Supply |
| Nockamixon | Pennsylvania | Bucks | 112 | High | Fair | 1973 | Recreation |
| 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 |
| Keystone Station | Pennsylvania | Armstrong | 100 | High | Satisfactory | 1965 | Grade Stabilization |
| Foster Joseph Sayers Dam | Pennsylvania | Centre | 100 | High | Not Available | 1969 | Flood Risk Reduction |
| North Slurry Pond | Pennsylvania | Washington | 100 | Low | Not Available | - | Tailings |
| Hankin | Pennsylvania | Chester | 100 | Low | Fair | 1989 | Flood Risk Reduction |
| Quemahoning | Pennsylvania | Somerset | 100 | High | Satisfactory | 1912 | Water Supply |
| Reading Anthracite CO - New St. Nicholas Breaker | Pennsylvania | Schuylkill | 100 | High | Not Available | - | Water Supply |
| Blue Marsh Dam | Pennsylvania | Berks | 100 | High | Not Available | 1977 | Flood Risk Reduction |
| Mill Run | Pennsylvania | Blair | 100 | High | Poor | 1957 | Water Supply |
| 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 |
| Beaver Run | Pennsylvania | Westmoreland | 92 | High | Satisfactory | 1952 | Water Supply |
| Thomas W Koon | Pennsylvania | Bedford | 92 | High | Satisfactory | 1932 | Water Supply |
| Lake Wynonah | Pennsylvania | Schuylkill | 92 | High | Fair | 1971 | Recreation |
| Maple Creek Slurry Pond No 2 - A | Pennsylvania | Washington | 91 | High | Satisfactory | 1978 | Other |
| Leavitt Branch (Pa-463) | Pennsylvania | Monroe | 90 | High | Poor | 1976 | Flood Risk Reduction |
| Aylesworth Creek Dam | Pennsylvania | Lackawanna | 90 | High | Not Available | 1970 | Flood Risk Reduction |
| Slurry Pond No. 1 | Pennsylvania | Greene | 90 | Low | Not Available | - | Water Supply |
| Two Lick Creek | Pennsylvania | Indiana | 90 | High | Satisfactory | 1968 | Grade Stabilization |
| Emerald No. 2 Back Valley Western | Pennsylvania | Greene | 90 | High | Satisfactory | - | Other |
| Woodcock Creek Dam | Pennsylvania | Crawford | 90 | High | Not Available | 1973 | Flood Risk Reduction |
| Marsh Creek Reservoir (Pa-437) | Pennsylvania | Chester | 90 | High | Fair | 1973 | Recreation |
| Emerald No. 1 Back Valley Western | Pennsylvania | Greene | 90 | High | Satisfactory | - | Other |
| Muddy Run Recreation Dam | Pennsylvania | Lancaster | 90 | Low | Satisfactory | 1967 | Hydroelectric |
| Union City Dam | Pennsylvania | Erie | 88 | High | Not Available | 1971 | Flood Risk Reduction |
| Sludge Bed No 6 | Pennsylvania | Butler | 88 | High | Fair | 1983 | Other |
| Green Lane Reservoir | Pennsylvania | Montgomery | 87 | High | Satisfactory | 1957 | Water Supply |
| Little Schuylkill River (Pa-422) | Pennsylvania | Schuylkill | 87 | High | Satisfactory | 1968 | Flood Risk Reduction |
| Still Creek | Pennsylvania | Schuylkill | 86 | High | Satisfactory | 1935 | Water Supply |
| H A Stewart | Pennsylvania | Westmoreland | 86 | High | Fair | 1920 | Water Supply |
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.