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 26–50 of 378
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Van Sciver Lake Bucks County | 18 | 1954 | Low | Poor |
| Vanderpool Bradford County | 14 | 1979 | Low | Not Rated |
| Upper Silver Lake Bucks County | 15 | 1919 | Low | Fair |
| Upper Northampton County | 11 | 1917 | Low | Fair |
| Upper Perry County | 22 | 1919 | Low | Not Rated |
| Unknown Dam Mercer County | 12 | 1963 | Low | Not Available |
| Unknown Dam Huntingdon County | 24 | 1968 | Low | Not Available |
| Unknown Dam Lancaster County | 31 | 1968 | Low | Not Available |
| Trough Creek Reservoir Bedford County | 25 | — | Low | Not Rated |
| Townsend Beaver County | 13 | 1913 | Low | Satisfactory |
| Toland Mine Cumberland County | 28 | 1981 | Low | Not Rated |
| Tingley Lake Susquehanna County | 7 | 1919 | Low | Fair |
| Timber Lake B Washington County | 25 | 1956 | Low | Fair |
| Thorn Run Westmoreland County | 22 | 1981 | Low | Satisfactory |
| Taylor Run Tioga County | 33 | — | Low | Not Rated |
| Swimming Bradford County | 12 | — | Low | Not Rated |
| Sweny Erie County | 24 | 1983 | Low | Not Rated |
| Swatara Dauphin County | 10 | 1935 | Low | Not Rated |
| Sunset Lake Columbia County | 12 | — | Low | Not Rated |
| Sunrise Lake Luzerne County | 27 | 1962 | Low | Satisfactory |
| Summit Lake No 2 Monroe County | 10 | 1919 | Low | Fair |
| Sullivan Sullivan County | 11 | 1948 | Low | Not Rated |
| Strodes Run Mifflin County | 21 | 1946 | Low | Not Rated |
| Stony Garden Reservoir Monroe County | 26 | 1912 | Low | Not Rated |
| Stinson Run Berks County | 29 | 1985 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.