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 1151–1175 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Dutch Run Cambria County | 8 | — | Significant | Poor |
| Dutch Fork Washington County | 42 | 1959 | High | Satisfactory |
| Dutch Country Egg Farm Lebanon County | 29 | — | Low | Not Rated |
| Dunmore No 7 Reservoir Lackawanna County | 45 | 1872 | High | Poor |
| Dunmore No 3 Lackawanna County | 14 | 1845 | Low | Fair |
| Dunmore No 1 Lackawanna County | 47 | 1877 | High | Fair |
| Duncan Ave West Flood Control Allegheny County | 34 | — | Significant | Satisfactory |
| Duffys Run Luzerne County | 14 | 1966 | High | Fair |
| Duffield Pond Susquehanna County | 27 | 1973 | Significant | Not Available |
| Duck Pond Washington County | 59 | 1983 | Significant | Fair |
| Duck Pond Lackawanna County | 17 | 1937 | High | Fair |
| Duck Harbor Pond Wayne County | 16 | 1907 | High | Fair |
| Drann Susquehanna County | 12 | 1919 | Low | Satisfactory |
| Doverspike No 1 Jefferson County | 41 | 1970 | High | Satisfactory |
| Doverspike Brothers Jefferson County | 27 | — | Low | Not Rated |
| Douglas Pond Wayne County | 12 | 1964 | Low | Fair |
| Dorys Pike County | 10 | 1919 | Significant | Fair |
| Dormoy Lake Monroe County | 20 | 1930 | Undetermined | Not Rated |
| Donegal Westmoreland County | 32 | 1967 | High | Satisfactory |
| Donald Amick Pond Bedford County | 16 | 1967 | Low | Not Available |
| Dinsmore No 2 Washington County | 27 | 1909 | High | Satisfactory |
| Diamond Lake Greene County | 35 | — | Low | Fair |
| Devon Detention Chester County | 8 | 1986 | Significant | Fair |
| Detention Pond Lehigh County | 32 | 1984 | Low | Fair |
| Deskus (Pa-452) Wayne County | 25 | 1963 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.