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 401–425 of 547
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Queen Lane Raw Water Basin Philadelphia County | 50 | 1900 | High | Fair |
| Raccoon Creek Beaver County | 45 | 1948 | High | Fair |
| Railroad Creek (Pa-615) Bucks County | 34 | 1977 | High | Fair |
| Rainbow (Pa-460) Crawford County | 40 | 1964 | High | Fair |
| Rastoka Greene County | 18 | — | Significant | Fair |
| Raven Run No 2 Schuylkill County | 37 | 1885 | High | Fair |
| Raven Run No 3 Schuylkill County | 40 | 1885 | High | Fair |
| Raw Water Pond Washington County | 25 | 1968 | Low | Fair |
| Ray T Mantz Luzerne County | 13 | 1962 | Low | Fair |
| Realty Engineering Developers Bucks County | 7 | — | Low | Fair |
| Reddon-Hall Susquehanna County | 23 | 1985 | High | Fair |
| Remington Road Detention Montgomery County | 16 | 1979 | High | Fair |
| Reservoir No 7 Wayne County | 13 | 1852 | Significant | Fair |
| Reynoldsville Storage #4 Jefferson County | 16 | 1961 | High | Fair |
| Richland Crossing Detention Bucks County | 9 | 1999 | Significant | Fair |
| Ridgebury Lake Bradford County | 35 | 1973 | High | Fair |
| Ridilla Upper Pond A Westmoreland County | 15 | — | Significant | Fair |
| Ringtown Reservoir No 6 Schuylkill County | 50 | 1921 | High | Fair |
| Robin Run (Pa-612) Bucks County | 46 | 1971 | High | Fair |
| Rock Airport Allegheny County | 11 | — | Significant | Fair |
| Rock Run Chester County | 42 | 1917 | High | Fair |
| Rohanna Greene County | 14 | — | Significant | Fair |
| Rose Valley Lake Lycoming County | 26 | 1972 | High | Fair |
| Ross Susquehanna County | 21 | 1974 | Significant | Fair |
| Ross Wyoming County | 8 | 1919 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.