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 310
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lauer Run Detention Basin Berks County | 9 | 1991 | Significant | Fair |
| Laurelwood Butler County | 14 | 1993 | Significant | Not Rated |
| Lehigh Coal & Navigation CO - #14 Plant Schuylkill County | 80 | — | Significant | Not Available |
| Lewis Greene County | 20 | — | Significant | Fair |
| Lindenhurst Road - Basin B Bucks County | 9 | — | Significant | Fair |
| Linden Lake Fayette County | 15 | 1955 | Significant | Poor |
| Lindenmere Monroe County | 12 | 1935 | Significant | Fair |
| Linpro Detention Basin Chester County | 18 | 1987 | Significant | Fair |
| Little Blue Saddle Beaver County | 15 | 1977 | Significant | Satisfactory |
| Little Flipper Lake Clearfield County | 17 | 1986 | Significant | Not Rated |
| Little Keen Pond Wayne County | 12 | 1902 | Significant | Fair |
| Little Sugar Run Westmoreland County | 25 | — | Significant | Not Rated |
| Locust Ridge Hunting Club Clinton County | 22 | 1965 | Significant | Satisfactory |
| Lofty Reservoir Schuylkill County | 30 | 1897 | Significant | Satisfactory |
| Longstown Village York County | 16 | 1998 | Significant | Satisfactory |
| Looney Lake Mercer County | 40 | 1952 | Significant | Satisfactory |
| Lost Creek Somerset County | 18 | 1954 | Significant | Fair |
| Lowe Lake Susquehanna County | 5 | 1917 | Significant | Fair |
| Makefield Glen Detention B Bucks County | 12 | 1988 | Significant | Poor |
| Malvern Preparatory Lower Chester County | 15 | 1923 | Significant | Satisfactory |
| Manada Golf Club Pond Dauphin County | 14 | — | Significant | Fair |
| Manor Creek Farms Butler County | 18 | — | Significant | Not Rated |
| Marshall Reservoir No. 2 Washington County | 37 | 1928 | Significant | Satisfactory |
| Martins Creek Ses Ash Basin No 4 Northampton County | 43 | 1989 | Significant | Fair |
| Mathies Sediment Pond No 5 Washington County | 33 | 1982 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.