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 |
|---|---|---|---|---|---|---|---|
| Rainbow (Pa-460) | Pennsylvania | Crawford | 40 | High | Fair | 1964 | Flood Risk Reduction |
| Saul Run (Pa-458) | Pennsylvania | Mercer | 40 | High | Satisfactory | 1963 | Flood Risk Reduction |
| Tafton Dike | Pennsylvania | Pike | 40 | High | Satisfactory | 1926 | Hydroelectric |
| Griffin | Pennsylvania | Lackawanna | 40 | High | Poor | 1888 | Water Supply |
| Looney Lake | Pennsylvania | Mercer | 40 | Significant | Satisfactory | 1952 | Recreation |
| Williams | Pennsylvania | Adams | 39 | Significant | Unsatisfactory | 1981 | Irrigation |
| Briar Creek Lake Pa-497 | Pennsylvania | Columbia | 39 | High | Fair | 1968 | Recreation |
| Pegs Run Slurry Impoundment | Pennsylvania | Greene | 39 | Low | Fair | 1983 | Other |
| Mount Laurel (Mud Run) | Pennsylvania | Schuylkill | 39 | High | Satisfactory | 1879 | Water Supply |
| Glade Spring | Pennsylvania | Bedford | 39 | Significant | Not Rated | 1973 | Recreation |
| Stony Run | Pennsylvania | Union | 39 | Significant | Not Rated | - | Water Supply |
| Fishpond | Pennsylvania | Columbia | 39 | Low | Not Rated | 1975 | Recreation |
| Maple Creek Silt Pond A | Pennsylvania | Washington | 39 | High | Satisfactory | 1977 | Other |
| Bailey Sediment Pond No 2 | Pennsylvania | Greene | 39 | High | Satisfactory | - | Other |
| Sausman Tailings | Pennsylvania | Huntingdon | 39 | Significant | Not Rated | - | Tailings |
| Harmar Storage Pond No 4 | Pennsylvania | Allegheny | 39 | Low | Satisfactory | 1980 | Other |
| Brunner Island Ash Basin No 6 | Pennsylvania | York | 39 | Significant | Satisfactory | 1979 | Other |
| Indian Lake | Pennsylvania | Susquehanna | 39 | High | Fair | 1916 | Recreation |
| Burnt Cabin Dunlap Creek (Pa-471) | Pennsylvania | Fayette | 39 | High | Satisfactory | 1967 | Flood Risk Reduction |
| Silver Creek Reservoir | Pennsylvania | Schuylkill | 38 | High | Satisfactory | 1850 | Water Supply |
| Emerald Lake | Pennsylvania | Washington | 38 | Significant | Satisfactory | 1912 | Recreation |
| Lake Oneida | Pennsylvania | Butler | 38 | High | Satisfactory | 1918 | Water Supply |
| Evans City Waterworks No 1 | Pennsylvania | Butler | 38 | High | Fair | 1954 | Water Supply |
| Northmoreland Lake (Pa-117) | Pennsylvania | Westmoreland | 38 | High | Satisfactory | 1989 | Recreation |
| Towamensing Trails | Pennsylvania | Carbon | 38 | High | Fair | 1977 | Recreation |
| Crystal Run Reservoir | Pennsylvania | Schuylkill | 38 | High | Fair | 1898 | Water Supply |
| Sheppard Myers | Pennsylvania | York | 38 | High | Poor | 1933 | Water Supply |
| Lanpher | Pennsylvania | Allegheny | 38 | High | Satisfactory | 1915 | Water Supply |
| Pa-482 | Pennsylvania | Washington | 38 | High | Satisfactory | 1970 | Flood Risk Reduction |
| Comet Lake | Pennsylvania | Franklin | 38 | Significant | Fair | 1962 | Recreation |
| Olyphant No 3 | Pennsylvania | Lackawanna | 38 | Significant | Fair | 1898 | Recreation |
| Opossum Lake | Pennsylvania | Cumberland | 38 | High | Satisfactory | 1961 | Recreation |
| Colyer Lake | Pennsylvania | Centre | 38 | High | Fair | 1966 | Recreation |
| Galion Bay | Pennsylvania | Clearfield | 37 | High | Fair | 1971 | Recreation |
| Griffin (Pa-455) | Pennsylvania | Tioga | 37 | High | Satisfactory | 1963 | Flood Risk Reduction |
| Raven Run No 2 | Pennsylvania | Schuylkill | 37 | High | Fair | 1885 | Water Supply |
| Marshall Reservoir No. 2 | Pennsylvania | Washington | 37 | Significant | Satisfactory | 1928 | Recreation |
| Memorial Lake | Pennsylvania | Lebanon | 37 | High | Poor | 1946 | Recreation |
| Sludge Bed No 5 | Pennsylvania | Butler | 37 | High | Fair | 1983 | Other |
| Laurel Run No 2 | Pennsylvania | Luzerne | 37 | High | Poor | 1885 | Recreation |
| Elder | Pennsylvania | Bedford | 37 | Low | Not Rated | - | Recreation |
| Huntingdon Smithfield Lily Creek | Pennsylvania | Huntingdon | 37 | High | Satisfactory | 1967 | Flood Risk Reduction |
| Bailey Mine Area No. 3 Saddle C | Pennsylvania | Greene | 37 | High | Satisfactory | 2014 | Other |
| H B Norton | Pennsylvania | Elk | 37 | High | Satisfactory | 1932 | Water Supply |
| Longford Lake | Pennsylvania | Susquehanna | 37 | High | Satisfactory | 1974 | Recreation |
| Pond No 2 | Pennsylvania | Chester | 36 | Low | Poor | - | Tailings |
| Jeannette (Mountain Valley Lake) | Pennsylvania | Westmoreland | 36 | Significant | Fair | 1889 | Recreation |
| Canonsburg No 2 | Pennsylvania | Washington | 36 | High | Poor | 1932 | Recreation |
| Beaver Creek (Pa-433) | Pennsylvania | Chester | 36 | High | Satisfactory | 1975 | Flood Risk Reduction |
| Kintz Creek (Pa-439) | Pennsylvania | Pike | 36 | High | Poor | 1970 | 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.