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 201–225 of 310
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Isabella Fresh Water Fayette County | 122 | — | Significant | Fair |
| Ice Pond Luzerne County | 13 | 1909 | Significant | Satisfactory |
| Huntington Woods Retention Pond Allegheny County | 20 | 1988 | Significant | Satisfactory |
| Hunter Lake Monroe County | 13 | 1928 | Significant | Poor |
| Humboldt Reservoir Luzerne County | 41 | 1911 | Significant | Fair |
| Huggy Bear Lake Pike County | 11 | — | Significant | Poor |
| Hosensack No 4 Lehigh County | 32 | 1885 | Significant | Fair |
| Horsham Towne Upper Pond Montgomery County | 17 | — | Significant | Fair |
| Horsham Towne Lower Pond Montgomery County | 16 | 1988 | Significant | Fair |
| Homewood Beaver County | 28 | 1852 | Significant | Fair |
| Hilloch Delaware County | 20 | 1951 | Significant | Fair |
| Highlands Farm Adams County | 28 | 1966 | Significant | Fair |
| Hidden Lake Dam Monroe County | 9 | 1928 | Significant | Not Available |
| Hidden Lake Luzerne County | 20 | 1967 | Significant | Poor |
| Hershey Mill Chester County | 14 | 1748 | Significant | Fair |
| Hathaway Pond Susquehanna County | 16 | 1919 | Significant | Fair |
| Hatfield Ferry Sedimentation Pond Greene County | 25 | — | Significant | Satisfactory |
| Hart Susquehanna County | 19 | — | Significant | Satisfactory |
| Griffis Susquehanna County | 17 | 1989 | Significant | Satisfactory |
| Greenwalt Westmoreland County | 27 | 1990 | Significant | Not Rated |
| Green Valley Farms Chester County | 23 | 1963 | Significant | Fair |
| Great Stream Commons Upper Union County | 17 | 2001 | Significant | Not Rated |
| Grays Landing Lock and Dam Greene County | 33 | 1995 | Significant | Not Available |
| Graterford Sewage Lagoons Montgomery County | 35 | 1986 | Significant | Fair |
| Gouldsboro Lake Monroe County | 18 | 1895 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.