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 651–675 of 780
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Shohola Marsh Pike County | 34 | 1968 | High | Fair |
| Silver Creek Reservoir Schuylkill County | 38 | 1850 | High | Satisfactory |
| Silver Lake York County | 6 | 1910 | High | Fair |
| Skytop Monroe County | 19 | 1930 | High | Satisfactory |
| Sky View Lake (Pa-440) Pike County | 32 | 1964 | High | Fair |
| Sludge Bed No 4 Butler County | 30 | 1984 | High | Fair |
| Sludge Bed No 5 Butler County | 37 | 1983 | High | Fair |
| Sludge Bed No 6 Butler County | 88 | 1983 | High | Fair |
| Smith Reservoir Erie County | 34 | 1925 | High | Satisfactory |
| Solebury Farm Bucks County | 27 | 1953 | High | Fair |
| Sonneborn (Witco) Reservoir Butler County | 23 | 1951 | High | Poor |
| South Pond Pike County | 13 | 1972 | High | Satisfactory |
| Speedwell Forge Lancaster County | 35 | 1966 | High | Satisfactory |
| Spring Brook Intake Lackawanna County | 33 | 1894 | High | Fair |
| Spring Lake Susquehanna County | 10 | 1919 | High | Poor |
| Spring Lake Monroe County | 22 | 1983 | High | Poor |
| Springton (Geist) Delaware County | 75 | 1931 | High | Fair |
| Springwater Lake Monroe County | 10 | 2009 | High | Satisfactory |
| Spruce Run Reservoir Union County | 46 | 1957 | High | Fair |
| Stanford Avenue Detention Basin Berks County | 27 | 1978 | High | Fair |
| Star Lake Susquehanna County | 26 | — | High | Fair |
| Stephen Foster Bradford County | 49 | 1977 | High | Fair |
| Stevens Lake Wyoming County | 9 | 1961 | High | Fair |
| Still Creek Schuylkill County | 86 | 1935 | High | Satisfactory |
| Stillwater Dam Susquehanna County | 77 | 1960 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.