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 1176–1200 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sandspring Lake Pike County | 15 | — | Low | Fair |
| Sand Spring Run Carbon County | 19 | 1951 | High | Fair |
| Sandy Run Cambria County | 33 | 1964 | High | Poor |
| Saul Run (Pa-458) Mercer County | 40 | 1963 | High | Satisfactory |
| Sausman Tailings Huntingdon County | 39 | — | Significant | Not Rated |
| Savery Mill Chester County | 14 | 1960 | Significant | Fair |
| Saw Creek Club Pike County | 20 | 1919 | High | Poor |
| Saw Mill Montgomery County | 47 | 1968 | High | Fair |
| Sawmill Run Butler County | 58 | 1968 | High | Fair |
| Saxe Pond Bradford County | 17 | 1929 | High | Fair |
| Schmunk Fayette County | 25 | — | Low | Not Rated |
| Schneider 2 Butler County | 32 | 1980 | Low | Not Available |
| Scotch Run Blair County | 40 | 1916 | Low | Not Rated |
| Scotch Valley Blair County | 17 | 1998 | Significant | Not Rated |
| Scotch Valley Estates Columbia County | 14 | 1978 | High | Not Rated |
| Scotts Run Berks County | 34 | 1953 | High | Fair |
| Sedimentation Pond "L-1" Jefferson County | 15 | 1992 | Low | Not Rated |
| Sedimentation Pond No. 8a Washington County | 25 | — | Low | Not Available |
| Sediment Basin No 3 Lackawanna County | 20 | — | Low | Satisfactory |
| Sediment Basin No 4 Lackawanna County | 21 | 1989 | Low | Satisfactory |
| Sediment Pond In Pit Susquehanna County | 45 | — | Low | Not Available |
| Seph Mack Indiana County | 21 | 1987 | Significant | Not Rated |
| Seven Fields Regional Sw Det Butler County | 14 | 1999 | Significant | Not Rated |
| Sgl #252 Road A Lycoming County | 7 | — | Low | Not Rated |
| Sgl #252 Road B Lycoming County | 9 | — | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.