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 801–825 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lakemont Farms No 2 Allegheny County | 20 | — | Significant | Satisfactory |
| Lakemont Farms No 1 Allegheny County | 30 | — | Significant | Satisfactory |
| Lake Mokoma Sullivan County | 16 | 1890 | High | Poor |
| Lake Moc-A-Tek Wayne County | 10 | — | Low | Fair |
| Lake Minausin Monroe County | 20 | 1903 | Low | Unsatisfactory |
| Lake Meade Adams County | 42 | 1967 | High | Poor |
| Lake May (Section F) Adams County | 22 | 1967 | High | Fair |
| Lake Maskenozha Pike County | 9 | 1893 | High | Fair |
| Lake Marge Susquehanna County | 30 | — | High | Fair |
| Lake Marburg York County | 107 | 1967 | High | Satisfactory |
| Lake Manjo Luzerne County | 15 | 1932 | Low | Fair |
| Lake Macleod Allegheny County | 30 | — | Significant | Fair |
| Lake Louise Luzerne County | 16 | 1927 | High | Fair |
| Lake Lloyd Potter County | 10 | — | Low | Not Rated |
| Lake Letterkenny Dam Franklin County | 16 | 1945 | Undetermined | Not Rated |
| Lake Lenape Monroe County | 10 | 1901 | Low | Not Rated |
| Lake Lattimore Pike County | 15 | 1930 | High | Poor |
| Lake La Tsuga Crawford County | 8 | 1877 | Low | Not Rated |
| Lake Latonka Mercer County | 34 | 1966 | High | Satisfactory |
| Lakeland Country Estates Green Lake Butler County | 25 | — | High | Fair |
| Lake Ladore Wayne County | 28 | 1860 | High | Satisfactory |
| Lake Kimberly Perry County | 16 | 1970 | Low | Not Rated |
| Lake Julia Fayette County | 34 | 1965 | High | Satisfactory |
| Lake John Sullivan County | 15 | 1958 | Low | Not Rated |
| Lake Jo-Ann Washington County | 16 | 1950 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.