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 351–375 of 415
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Skytop Monroe County | 19 | 1930 | High | Satisfactory |
| Slade Allegheny County | 17 | — | Significant | Satisfactory |
| Smith Reservoir Erie County | 34 | 1925 | High | Satisfactory |
| South Low Dissolved Solids Imp Beaver County | 32 | 1974 | Significant | Satisfactory |
| South Pond Pike County | 13 | 1972 | High | Satisfactory |
| Speedwell Forge Lancaster County | 35 | 1966 | High | Satisfactory |
| Spring Garden Bucks County | 9 | 1920 | Low | Satisfactory |
| Springwater Lake Monroe County | 10 | 2009 | High | Satisfactory |
| Stark Lackawanna County | 20 | 1850 | Low | Satisfactory |
| Steel Washington County | 15 | 1953 | Low | Satisfactory |
| Still Creek Schuylkill County | 86 | 1935 | High | Satisfactory |
| Stillwater Lake Monroe County | 8 | 1900 | High | Satisfactory |
| Stonehedge Pond Wyoming County | 18 | 1990 | High | Satisfactory |
| Stoughton Lake Somerset County | 23 | 1951 | Significant | Satisfactory |
| Sugar Creek Bradford County | 15 | 1956 | High | Satisfactory |
| Sugar Run Westmoreland County | 60 | 1907 | High | Satisfactory |
| Summit Lake No 1 Monroe County | 8 | 1919 | Significant | Satisfactory |
| Sunrise Lake Luzerne County | 27 | 1962 | Low | Satisfactory |
| Sutula/Stroud Allegheny County | 13 | — | Significant | Satisfactory |
| Suydam (Pa-418) Wayne County | 24 | 1960 | High | Satisfactory |
| Sweet Arrow Lake Schuylkill County | 36 | 1923 | High | Satisfactory |
| Taxiway "E" Detention Basin Allegheny County | 84 | 1996 | Significant | Satisfactory |
| Thomas Creek (Rc & D-105) Susquehanna County | 24 | 1978 | High | Satisfactory |
| Thomas W Koon Bedford County | 92 | 1932 | High | Satisfactory |
| Thorn Run Westmoreland County | 22 | 1981 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.