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 1–25 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| 14-North Impoundment Allegheny County | 42 | — | High | Satisfactory |
| Acme (Pa-657) Westmoreland County | 33 | 1975 | High | Satisfactory |
| Acre Pond Susquehanna County | 12 | 1825 | High | Satisfactory |
| Adams Brook Pike County | 10 | 1932 | Low | Fair |
| Adam T. Bower Memorial Northumberland County | 8 | 1969 | Low | Not Rated |
| Agronomy Farm Pond Centre County | 27 | 1967 | Low | Not Available |
| Alder Marsh Wayne County | 10 | 1948 | High | Fair |
| Allegheny River Lock and Dam 2 Allegheny County | 58 | 1934 | Significant | Not Available |
| Allegheny River Lock and Dam 4 Allegheny County | 29 | 1927 | Significant | Not Available |
| Allegheny River Lock and Dam 5 Armstrong County | 16 | 1927 | Low | Not Available |
| Allegheny River Lock and Dam 6 Armstrong County | 21 | 1928 | Low | Not Available |
| Allegheny River Lock and Dam 7 Armstrong County | 32 | 1931 | Low | Not Available |
| Allegheny River Lock and Dam 8 Armstrong County | 60 | 1931 | Low | Not Available |
| Allegheny River Lock and Dam 9 Armstrong County | 55 | 1938 | Low | Not Available |
| Allegheny Storage Blair County | 31 | 1905 | High | Fair |
| Allison Reservoir Fayette County | 45 | 1917 | High | Fair |
| Alpine Lake Monroe County | 11 | 1962 | Low | Not Rated |
| Altemus Indiana County | 30 | 1987 | Significant | Not Rated |
| Alvin R. Bush Dam Clinton County | 165 | 1962 | High | Not Available |
| Ambrose Mine Armstrong County | 26 | — | Low | Not Rated |
| Amerikohl Management Butler County | 29 | 1983 | Low | Not Rated |
| Analomink Lake Monroe County | 11 | 1910 | Significant | Satisfactory |
| Anderson Creek Clearfield County | 42 | 1903 | High | Fair |
| Andorra Springs Basin B Montgomery County | 16 | — | High | Fair |
| Andy Washington County | 35 | — | Low | Satisfactory |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.