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 1001–1025 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hart Susquehanna County | 19 | — | Significant | Satisfactory |
| Harris Pond Luzerne County | 10 | 1922 | High | Fair |
| Harmon Creek (Pa-484) Washington County | 67 | 1971 | High | Satisfactory |
| Harmar Storage Pond No 4 Allegheny County | 39 | 1980 | Low | Satisfactory |
| Harmar Refuse Bank Allegheny County | 410 | 1957 | High | Satisfactory |
| Harkins Pond Luzerne County | 12 | — | High | Satisfactory |
| Hankins Pond Wayne County | 26 | 1830 | High | Unsatisfactory |
| Hankin Chester County | 100 | 1989 | Low | Fair |
| Hanger Service Road Det Basin Allegheny County | 28 | 1992 | Low | Satisfactory |
| Hammond Lakes Tioga County | 23 | 1970 | Low | Not Available |
| Hammond Dam Tioga County | 122 | 1978 | High | Not Available |
| Hamlin Lake Park McKean County | 10 | 1915 | High | Fair |
| Hamilton Street Lehigh County | 14 | 1983 | Low | Satisfactory |
| Hamilton Lake (Pa-602) Tioga County | 76 | 1967 | High | Fair |
| Hamburg Reservoir Berks County | 53 | 1963 | High | Fair |
| Hamburg Flood Control (Pa-477) Berks County | 52 | 1965 | High | Fair |
| Hamburg Flood Control (Pa-476) Berks County | 46 | 1965 | High | Fair |
| Hallowood Acres Monroe County | 31 | 1970 | High | Fair |
| Haighs Pond Bradford County | 13 | — | Low | Not Rated |
| Hadley (Pa-489) Mercer County | 51 | 1968 | High | Fair |
| Gumble Brothers Pike County | 10 | 1950 | Low | Poor |
| Grubers Lake Monroe County | 12 | 1928 | Low | Fair |
| Group Camp Beaver County | 20 | 1938 | High | Fair |
| Groff Mill Lancaster County | 8 | 1919 | Low | Not Rated |
| Griffis Susquehanna County | 17 | 1989 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.