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 51–75 of 415
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sugar Creek Bradford County | 15 | 1956 | High | Satisfactory |
| Stoughton Lake Somerset County | 23 | 1951 | Significant | Satisfactory |
| Stonehedge Pond Wyoming County | 18 | 1990 | High | Satisfactory |
| Stillwater Lake Monroe County | 8 | 1900 | High | Satisfactory |
| Still Creek Schuylkill County | 86 | 1935 | High | Satisfactory |
| Steel Washington County | 15 | 1953 | Low | Satisfactory |
| Stark Lackawanna County | 20 | 1850 | Low | Satisfactory |
| Springwater Lake Monroe County | 10 | 2009 | High | Satisfactory |
| Spring Garden Bucks County | 9 | 1920 | Low | Satisfactory |
| Speedwell Forge Lancaster County | 35 | 1966 | High | Satisfactory |
| South Pond Pike County | 13 | 1972 | High | Satisfactory |
| South Low Dissolved Solids Imp Beaver County | 32 | 1974 | Significant | Satisfactory |
| Smith Reservoir Erie County | 34 | 1925 | High | Satisfactory |
| Slade Allegheny County | 17 | — | Significant | Satisfactory |
| Skytop Monroe County | 19 | 1930 | High | Satisfactory |
| Simon Pond Washington County | — | — | Significant | Satisfactory |
| Silver Creek Reservoir Schuylkill County | 38 | 1850 | High | Satisfactory |
| Shenandoah Creek Schuylkill County | 34 | 1935 | Low | Satisfactory |
| Shawnee Pond Monroe County | 11 | 2008 | Significant | Satisfactory |
| Shawnee Lake Monroe County | 22 | 1927 | High | Satisfactory |
| Shaver's Creek Huntingdon County | 48 | 1961 | High | Satisfactory |
| Shaggers Inn Waterfowl Clearfield County | 17 | 1989 | High | Satisfactory |
| Sediment Basin No 4 Lackawanna County | 21 | 1989 | Low | Satisfactory |
| Sediment Basin No 3 Lackawanna County | 20 | — | Low | Satisfactory |
| Saul Run (Pa-458) Mercer County | 40 | 1963 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.