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 1151–1175 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Rock Hollow Road Berks County | 26 | 1969 | Low | Poor |
| Rock Run Chester County | 42 | 1917 | High | Fair |
| Rockview Reservoir Centre County | 53 | — | High | Poor |
| Rocky Glen Lackawanna County | 19 | 1903 | High | Poor |
| Rocky Spring Dam Franklin County | 11 | 1967 | Undetermined | Not Rated |
| Rohanna Greene County | 14 | — | Significant | Fair |
| Rolling Greens (Bethlehem Twp Det) Northampton County | 12 | 1986 | High | Satisfactory |
| Romobe Lake Susquehanna County | 8 | 1914 | Low | Not Rated |
| Roscoe Burgess Sullivan County | 17 | 1951 | Significant | Not Rated |
| Rose Valley Lake Lycoming County | 26 | 1972 | High | Fair |
| Ross Susquehanna County | 21 | 1974 | Significant | Fair |
| Ross Wyoming County | 8 | 1919 | Low | Fair |
| Rossiter Indiana County | 15 | 1919 | High | Poor |
| Round Top Dauphin County | 8 | 1902 | Low | Not Rated |
| Roxbury Franklin County | 60 | — | High | Fair |
| Royal Reservoir Fayette County | 32 | 1908 | Significant | Not Rated |
| Rudy Pond York County | 10 | 2005 | Significant | Satisfactory |
| Russelton Slurry Pond No 3 Allegheny County | 153 | 1967 | Low | Satisfactory |
| Ryerson Station Greene County | 42 | 1960 | High | Unsatisfactory |
| Saddle Lake Wyoming County | 24 | 1965 | High | Satisfactory |
| Saddlers Run Lebanon County | 28 | 1957 | Low | Not Rated |
| Sadsbury Twp Detention Pond 1 Lancaster County | 15 | 1982 | Low | Not Rated |
| Safe Harbor Lancaster County | 75 | 1930 | Significant | Satisfactory |
| Saltlick Cambria County | 116 | 1913 | High | Satisfactory |
| Salt Run Reservoir Cameron County | 44 | 1911 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.