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 226–250 of 310
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Reservoir No 7 Wayne County | 13 | 1852 | Significant | Fair |
| Richland Crossing Detention Bucks County | 9 | 1999 | Significant | Fair |
| Ridge Lake Wayne County | 10 | — | Significant | Poor |
| Ridilla Upper Pond A Westmoreland County | 15 | — | Significant | Fair |
| Rinehart Montgomery County | 12 | 1988 | Significant | Satisfactory |
| Rock Airport Allegheny County | 11 | — | Significant | Fair |
| Rohanna Greene County | 14 | — | Significant | Fair |
| Roscoe Burgess Sullivan County | 17 | 1951 | Significant | Not Rated |
| Ross Susquehanna County | 21 | 1974 | Significant | Fair |
| Royal Reservoir Fayette County | 32 | 1908 | Significant | Not Rated |
| Rudy Pond York County | 10 | 2005 | Significant | Satisfactory |
| Safe Harbor Lancaster County | 75 | 1930 | Significant | Satisfactory |
| Sausman Tailings Huntingdon County | 39 | — | Significant | Not Rated |
| Savery Mill Chester County | 14 | 1960 | Significant | Fair |
| Scotch Valley Blair County | 17 | 1998 | Significant | Not Rated |
| Seph Mack Indiana County | 21 | 1987 | Significant | Not Rated |
| Seven Fields Regional Sw Det Butler County | 14 | 1999 | Significant | Not Rated |
| Shaw Dam Adams County | — | — | Significant | Poor |
| Shawnee Pond Monroe County | 11 | 2008 | Significant | Satisfactory |
| Shillington Memorial Park Berks County | 9 | 1936 | Significant | Fair |
| Shirfs Run Cambria County | 15 | 1925 | Significant | Not Rated |
| Siegel Marsh Erie County | 12 | 1958 | Significant | Not Rated |
| Silt Pond Lawrence County | 40 | — | Significant | Not Available |
| Simon Pond Washington County | — | — | Significant | Satisfactory |
| Ski Roundtop York County | 20 | — | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.