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 476–500 of 547
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Susquehanna Woods Lower Montgomery County | 14 | 2005 | High | Fair |
| Tamarack Lake B (Pa-461b) Crawford County | 21 | 1962 | High | Fair |
| Tanglwood Lake Pike County | 18 | 1965 | High | Fair |
| Taylor Pond (Pa-446) Pike County | 76 | 1963 | High | Fair |
| Thomas Meeting Detention Basin Chester County | 5 | 1990 | Significant | Fair |
| Thorn Hill Park Detention Basin Allegheny County | 18 | 1987 | Significant | Fair |
| Timber Creek Condo Montgomery County | 10 | 1985 | Significant | Fair |
| Timber Lake Washington County | 17 | 1990 | Significant | Fair |
| Timber Lake B Washington County | 25 | 1956 | Low | Fair |
| Tingley Lake Susquehanna County | 7 | 1919 | Low | Fair |
| Tink Wig Lake Pike County | 11 | 1968 | Significant | Fair |
| Tipton Blair County | 66 | 1924 | High | Fair |
| Towamensing Trails Carbon County | 38 | 1977 | High | Fair |
| Township Line (Airport Road) Chester County | 34 | 1935 | High | Fair |
| Travis Pond Wayne County | 5 | — | Significant | Fair |
| Trax Farms Washington County | 26 | 1963 | High | Fair |
| Treesdale Impoundment #1 Butler County | 15 | — | High | Fair |
| Trostle Pond Lackawanna County | 15 | — | Significant | Fair |
| Trout Run Westmoreland County | 41 | 1927 | High | Fair |
| Trout Run Berks County | 104 | 1976 | High | Fair |
| Trout Run No 4 Northumberland County | 34 | 1882 | High | Fair |
| Tubmill Westmoreland County | 40 | 1907 | High | Fair |
| Tuscarora Lake Susquehanna County | 12 | 1919 | High | Fair |
| Two Mile Run Venango County | 85 | 1971 | High | Fair |
| Tyler Lake Susquehanna County | 6 | 1919 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.