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 376–400 of 547
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hamlin Lake Park McKean County | 10 | 1915 | High | Fair |
| 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 |
| Hadley (Pa-489) Mercer County | 51 | 1968 | High | Fair |
| Grubers Lake Monroe County | 12 | 1928 | Low | Fair |
| Group Camp Beaver County | 20 | 1938 | High | Fair |
| Gregory Pond Monroe County | 8 | 1922 | Low | Fair |
| Green Valley Farms Chester County | 23 | 1963 | Significant | Fair |
| Green Hills Lake Berks County | 18 | 1930 | High | Fair |
| Greene Dreher (Pa-447) Wayne County | 20 | 1961 | High | Fair |
| Gravel Lick Clearfield County | 75 | 1974 | High | Fair |
| Graterford Sewage Lagoons Montgomery County | 35 | 1986 | Significant | Fair |
| Grahamville Reservoir Erie County | 29 | 1906 | High | Fair |
| Grace Mine Tailings Berks County | 145 | 1957 | High | Fair |
| Gouldsboro Lake Monroe County | 18 | 1895 | Significant | Fair |
| Goose Pond Run (Pa-464) Monroe County | 97 | 1975 | High | Fair |
| Golf Ridge Lower Montgomery County | 12 | 1996 | High | Fair |
| Gold Key Lake Pike County | 8 | — | Significant | Fair |
| Glendale Cambria County | 60 | 1960 | High | Fair |
| Glencannon Pond Washington County | 24 | — | Significant | Fair |
| Glass Pond No 2 Wayne County | 17 | 1914 | Significant | Fair |
| Gillespies Pond Susquehanna County | 10 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.