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 376–400 of 415
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Thorn Run Butler County | 40 | 1903 | High | Satisfactory |
| Timber Chester County | 19 | 1986 | Significant | Satisfactory |
| Toby Creek Impoundment Basin Luzerne County | 28 | 1940 | High | Satisfactory |
| Townsend Beaver County | 13 | 1913 | Low | Satisfactory |
| Treated Water Pond Washington County | 59 | 1966 | High | Satisfactory |
| Twin Lakes No 1 Westmoreland County | 31 | 1908 | High | Satisfactory |
| Twin Lakes No 2 Westmoreland County | 34 | 1910 | High | Satisfactory |
| Two Lick Creek Indiana County | 90 | 1968 | High | Satisfactory |
| Upper Owl Creek Schuylkill County | 43 | 1921 | High | Satisfactory |
| Upper Southside Sport Beaver County | 14 | 1979 | Significant | Satisfactory |
| Upper West Deer Lake Allegheny County | 24 | — | High | Satisfactory |
| Valley-Hi Eagle Lake Fulton County | 25 | 1964 | High | Satisfactory |
| Verga Pond Pike County | 8 | — | Significant | Satisfactory |
| Village At Pine Allegheny County | 15 | 1979 | Significant | Satisfactory |
| Wadham Creek Luzerne County | 30 | 1959 | High | Satisfactory |
| Walden Woods Allegheny County | 17 | 2000 | High | Satisfactory |
| Walker Farm Lagoon Chester County | 26 | 2002 | High | Satisfactory |
| Walker Lake Pike County | 15 | 1953 | High | Satisfactory |
| Warrior Ridge Huntingdon County | 27 | 1906 | Low | Satisfactory |
| Washington No 3 Washington County | 48 | 1895 | High | Satisfactory |
| Waste House No 1 Schuylkill County | 57 | 1884 | High | Satisfactory |
| Waste House No 3 Schuylkill County | 41 | 1902 | High | Satisfactory |
| Waterfall Way Detention Basin Washington County | 27 | — | Significant | Satisfactory |
| Watres Lackawanna County | 135 | 1925 | High | Satisfactory |
| Way Lake Susquehanna County | 12 | 1992 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.