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 1101–1125 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Queen Esther Lake Bradford County | 11 | 1972 | Significant | Not Rated |
| Queen Lane Raw Water Basin Philadelphia County | 50 | 1900 | High | Fair |
| Quemahoning Somerset County | 100 | 1912 | High | Satisfactory |
| 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 |
| Ramey Clearfield County | 17 | — | Low | Not Rated |
| Rapp Run Flood Retarding Montgomery County | 16 | 2014 | High | Satisfactory |
| 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 |
| Raystown Dam Huntingdon County | 225 | 1973 | High | Not Available |
| Ray T Mantz Luzerne County | 13 | 1962 | Low | Fair |
| Reading Anthracite CO - New St. Nicholas Breaker Schuylkill County | 100 | — | High | Not Available |
| Reading Anthracite - Elangowen Schuylkill County | 20 | — | Low | Not Available |
| Reading Anthracite - Trevorton Northumberland County | 25 | — | High | Not Available |
| Realty Engineering Developers Bucks County | 7 | — | Low | Fair |
| Redbank Valley Water Supply Clarion County | 8 | 1919 | Low | Not Rated |
| Reddon-Hall Susquehanna County | 23 | 1985 | High | Fair |
| Reflection Lake Wayne County | 19 | 1974 | Low | Poor |
| Reflection Lake (Romosa Lake) Susquehanna County | 11 | 1952 | Low | Poor |
| Rehfeldt Bradford County | 15 | 1983 | Low | Not Rated |
| Remington Road Detention Montgomery County | 16 | 1979 | High | Fair |
| Renaissance Regional Basin Montgomery County | 15 | — | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.