Pennsylvania Dams
1,481 dams tracked by the National Inventory of Dams
Total Dams
1,481
High Hazard
780
52.7%
Poor / Unsatisfactory
215
Average Age
80 yrs
Hazard Classification
High780 (52.7%)
Significant310 (20.9%)
Low378 (25.5%)
Condition Assessment
Satisfactory415 (28.0%)
Fair547 (36.9%)
Poor / Unsatisfactory215 (14.5%)
Not Rated304 (20.5%)
Federal
57
State
152
Local
351
Private
911
Tallest Dams
- Harmar Refuse Bank410 ft
- Little Blue Run400 ft
- Cumberland No. 1 Slurry Pond 1380 ft
- Cumberland No. 2 Slurry Pond370 ft
- Bailey Mine Area No. 3 Slurry337 ft
High Hazard Dams
Poor Condition Dams
- Little Pine CreekPoor
- North ForkPoor
- DehartPoor
- Mill RunPoor
- West Newton SludgeUnsatisfactory
All Dams in Pennsylvania
Showing 176–200 of 310
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Maxwell Locks and Dam Washington County | 56 | 1964 | Significant | Not Available |
| Mcconnell Lake Pike County | 16 | 1957 | Significant | Fair |
| Mcdonaldton Somerset County | 16 | 1911 | Significant | Fair |
| Meadow Lake Monroe County | 14 | 1916 | Significant | Fair |
| Mican Pond Wayne County | 8 | 1932 | Significant | Fair |
| Mill Club Delaware County | 22 | 1908 | Significant | Fair |
| Mill Pond Wayne County | 10 | 1917 | Significant | Fair |
| Mine No 84 - Pond 7 Washington County | 36 | 1980 | Significant | Fair |
| Mitchell Sludge Sedimentation Pond Washington County | 50 | 1982 | Significant | Satisfactory |
| Monteville Jefferson County | — | — | Significant | Not Rated |
| Montgomery Locks and Dam Beaver County | 62 | 1936 | Significant | Not Available |
| Montour Heights Country Club Allegheny County | 54 | 1987 | Significant | Satisfactory |
| Moosic Lakes Lackawanna County | 12 | — | Significant | Poor |
| Mt Morris Sportsmens Association Greene County | 20 | — | Significant | Satisfactory |
| Myers Lackawanna County | 12 | 1938 | Significant | Fair |
| Naylor Lower York County | 19 | — | Significant | Satisfactory |
| Naylor Middle York County | — | — | Significant | Satisfactory |
| Nello L Teer Co Greene County | 18 | 1980 | Significant | Satisfactory |
| Nick Pond Susquehanna County | 10 | 1996 | Significant | Satisfactory |
| North Low Dissolved Solids Imp Beaver County | 32 | 1974 | Significant | Satisfactory |
| Oakford Glen Lackawanna County | 22 | — | Significant | Satisfactory |
| Oakland Susquehanna County | 18 | 1896 | Significant | Not Rated |
| Olyphant No 2 Lackawanna County | 55 | 1888 | Significant | Fair |
| Olyphant No 3 Lackawanna County | 38 | 1898 | Significant | Fair |
| Orchard Hill Washington County | 23 | 1965 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.