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 151–175 of 378
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Morganza Washington County | 24 | 1991 | Low | Satisfactory |
| Mingo Lake Susquehanna County | 15 | 1895 | Low | Fair |
| Mine 33 Sed Pond No. 1 Cambria County | 32 | — | Low | Not Available |
| Mill Service No 5 Westmoreland County | 75 | 1976 | Low | Not Rated |
| Mill Creek Intake Luzerne County | 35 | 1914 | Low | Not Rated |
| Middle Mang Wayne County | 17 | 1977 | Low | Satisfactory |
| Middle Lake Susquehanna County | 7 | 1914 | Low | Fair |
| Meyers Pond Dam Crawford County | 10 | 1967 | Low | Poor |
| Metroplex Montgomery County | 15 | 1999 | Low | Fair |
| Marshall Lake Allegheny County | 14 | — | Low | Fair |
| Manzanedo Monroe County | 12 | 1914 | Low | Fair |
| Manor Lake Bucks County | 9 | 1930 | Low | Poor |
| Mannitto Westmoreland County | 18 | — | Low | Not Rated |
| Maiden Creek Reservoir Berks County | 15 | 1960 | Low | Fair |
| Madison Heights Butler County | 12 | 2005 | Low | Not Rated |
| Mackiewicz Tioga County | 15 | 1969 | Low | Not Available |
| Luzerne Coal CO Wetland Fayette County | 32 | — | Low | Not Rated |
| Lukavick Butler County | 27 | 1969 | Low | Not Available |
| Lower Lake Monroe County | 30 | 1923 | Low | Fair |
| Lower Lake Susquehanna County | 7 | 1919 | Low | Fair |
| Lower Monroe County | 24 | 1921 | Low | Fair |
| Lower Northampton County | 7 | 1917 | Low | Fair |
| Lovingood Greene County | 30 | — | Low | Satisfactory |
| Lonesome Lake Westmoreland County | 24 | — | Low | Poor |
| Little Sugar Creek Crawford County | 14 | 1966 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.