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 351–375 of 547
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Horsham Towne Upper Pond Montgomery County | 17 | — | Significant | Fair |
| Horsham Towne Lower Pond Montgomery County | 16 | 1988 | Significant | Fair |
| Hopewell Berks County | 29 | 1937 | High | Fair |
| Homewood Beaver County | 28 | 1852 | Significant | Fair |
| Homer Gap No 2 Blair County | 29 | 1913 | High | Fair |
| Holtwood Ses Ash Basin No 2 Lancaster County | 57 | 2000 | High | Fair |
| Holly Susquehanna County | 25 | 1988 | Low | Fair |
| Hobo Ventures Washington County | 118 | — | Low | Fair |
| Hilltown (Pa-625) Bucks County | 42 | 1980 | High | Fair |
| Hilloch Delaware County | 20 | 1951 | Significant | Fair |
| Highlands Farm Adams County | 28 | 1966 | Significant | Fair |
| Hidden Valley Pond No 2 Somerset County | 14 | 1987 | High | Fair |
| Hidden Valley Pond No 1 Somerset County | 21 | 1987 | High | Fair |
| Hidden Valley Dauphin County | 22 | 1931 | High | Fair |
| Hibernia (Pa-436f) Chester County | 65 | 1994 | High | Fair |
| Hetzell Pond Wayne County | 8 | — | Low | Fair |
| Hershey Mill Chester County | 14 | 1748 | Significant | Fair |
| Hensingersville Lehigh County | 18 | 1936 | Low | Fair |
| Hemlock Lake Pike County | 14 | 1930 | High | Fair |
| Hemlock Lake Monroe County | 33 | 1950 | High | Fair |
| Hawk Mountain Schuylkill County | 35 | 1978 | High | Fair |
| Hathaway Pond Susquehanna County | 16 | 1919 | Significant | Fair |
| H A Stewart Westmoreland County | 86 | 1920 | High | Fair |
| Harris Pond Luzerne County | 10 | 1922 | High | Fair |
| Hankin Chester County | 100 | 1989 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.