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 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Spring Lake Monroe County | 22 | 1983 | High | Poor |
| Spring Lake Susquehanna County | 10 | 1919 | High | Poor |
| Spring Hill Cumberland County | 18 | 1970 | Significant | Not Rated |
| Spring Garden Bucks County | 9 | 1920 | Low | Satisfactory |
| Spring Brook Intake Lackawanna County | 33 | 1894 | High | Fair |
| Splash Sullivan County | 10 | 1958 | Low | Not Rated |
| Spencer Mill Susquehanna County | 16 | 1919 | Significant | Poor |
| Speedwell Forge Lancaster County | 35 | 1966 | High | Satisfactory |
| Spangenberg Lake Lackawanna County | 15 | 1949 | Significant | Fair |
| South Slurry Pond Washington County | 60 | — | Low | Not Available |
| South Pond Pike County | 13 | 1972 | High | Satisfactory |
| South Low Dissolved Solids Imp Beaver County | 32 | 1974 | Significant | Satisfactory |
| Sonneborn (Witco) Reservoir Butler County | 23 | 1951 | High | Poor |
| Sones Pond Sullivan County | 20 | 1919 | Low | Not Rated |
| Somerset Lakes Basin No 2 Chester County | 12 | 1991 | Significant | Fair |
| Solebury Farm Bucks County | 27 | 1953 | High | Fair |
| Snyner-Westhaver Cumberland County | 18 | 1979 | Low | Not Rated |
| Snyder Lake Susquehanna County | 25 | 1971 | Significant | Not Available |
| Smith Reservoir Erie County | 34 | 1925 | High | Satisfactory |
| Smith and Ponzo Washington County | 24 | 1939 | Significant | Fair |
| Slurry Pond No. 1 Greene County | 90 | — | Low | Not Available |
| Slurry Pond #2 Indiana County | 40 | — | Significant | Not Available |
| Sludge Bed No 6 Butler County | 88 | 1983 | High | Fair |
| Sludge Bed No 5 Butler County | 37 | 1983 | High | Fair |
| Sludge Bed No 4 Butler County | 30 | 1984 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.