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 1176–1200 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Derry Rod and Gun Club Westmoreland County | 27 | 1952 | High | Fair |
| Dehart Dauphin County | 105 | 1940 | High | Poor |
| Deer Valley Lake Somerset County | 22 | 1953 | Low | Not Rated |
| Deer Lake Wayne County | 13 | 1968 | High | Fair |
| Deer Lake Sullivan County | 7 | — | Significant | Not Rated |
| Deer Lake Schuylkill County | 12 | 1925 | High | Poor |
| Deer Lake Fayette County | 15 | 1906 | High | Fair |
| Deerfield Lake Wayne County | 12 | 1971 | High | Fair |
| Deep Creek Montgomery County | 19 | 1939 | High | Fair |
| Decker Swamp Pike County | 11 | 1951 | Low | Poor |
| David Strongs Erie County | 24 | — | Low | Not Rated |
| David Mine Sedimentation Pond No 2 Armstrong County | 35 | 1989 | High | Fair |
| David Mine Equalization Pond No 3 Armstrong County | 21 | — | Significant | Not Rated |
| Dashields Locks and Dam Allegheny County | 44 | 1929 | Significant | Not Available |
| Dark Hollow Mifflin County | 44 | 1934 | High | Fair |
| Dalton Run Somerset County | 61 | 1905 | High | Poor |
| C.W. Bill Young Lock and Dam Allegheny County | 36 | 1934 | Significant | Not Available |
| Custards Crawford County | 8 | 1972 | Low | Satisfactory |
| Curwensville Dam Clearfield County | 131 | 1965 | High | Not Available |
| Curtis Lackawanna County | 45 | 1887 | High | Poor |
| Cummings Indiana County | 29 | 1908 | High | Fair |
| Cumberland No. 2 Slurry Pond Greene County | 370 | — | High | Satisfactory |
| Cumberland No. 2 Sediment Pond. Greene County | 12 | 2003 | Significant | Satisfactory |
| Cumberland No. 1 Slurry Pond 1 Greene County | 380 | 1984 | High | Satisfactory |
| Cumberland No 1 Sed Pond Greene County | 25 | 1985 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.