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 251–275 of 547
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lower Monroe County | 24 | 1921 | Low | Fair |
| Lower Northampton County | 7 | 1917 | Low | Fair |
| Lowe Lake Susquehanna County | 5 | 1917 | Significant | Fair |
| Lovelass Wayne County | 20 | 1919 | High | Fair |
| Lost Creek Somerset County | 18 | 1954 | Significant | Fair |
| Long Run Reservoir No 1 Carbon County | 26 | 1885 | High | Fair |
| Long Pine Run Adams County | 112 | 1970 | High | Fair |
| Locust Lake Schuylkill County | 46 | 1954 | High | Fair |
| Locust Creek (Pa-423) Schuylkill County | 98 | 1964 | High | Fair |
| Lloydell Cambria County | 43 | 1906 | High | Fair |
| Little Keen Pond Wayne County | 12 | 1902 | Significant | Fair |
| Little Buffalo Creek Perry County | 52 | 1970 | High | Fair |
| Little Blue Run Beaver County | 400 | 1977 | High | Fair |
| Linpro Detention Basin Chester County | 18 | 1987 | Significant | Fair |
| Lindenmere Monroe County | 12 | 1935 | Significant | Fair |
| Lindenhurst Road - Basin B Bucks County | 9 | — | Significant | Fair |
| Lily Pond Pike County | 13 | 1898 | Low | Fair |
| Ligonier Reservoir Westmoreland County | 35 | 1954 | High | Fair |
| Licking Creek Juniata County | 26 | — | High | Fair |
| Lewis Greene County | 20 | — | Significant | Fair |
| Leopard Lake Chester County | 11 | — | High | Fair |
| Leaser Lake Lehigh County | 56 | 1971 | High | Fair |
| Laurel Wood Westmoreland County | 25 | — | Low | Fair |
| Laurel Run Lackawanna County | 44 | 1894 | High | Fair |
| Laurel Lake Cumberland County | 25 | 1968 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.