Dams in Pennsylvania
1,483
Total Dams
780
High Hazard
52.60%
% High Hazard
80.4 yrs
Average Age
Counties
| County | Dams | High Hazard | % High | Avg Age |
|---|---|---|---|---|
| Wayne | 98 | 49 | 50.00% | 103.8 yrs |
| Pike | 81 | 45 | 55.56% | 82.3 yrs |
| Monroe | 79 | 43 | 54.43% | 84.5 yrs |
| Schuylkill | 54 | 43 | 79.63% | 108.4 yrs |
| Washington | 68 | 40 | 58.82% | 67.0 yrs |
| Luzerne | 56 | 35 | 62.50% | 99.3 yrs |
| Lackawanna | 50 | 32 | 64.00% | 111.3 yrs |
| Westmoreland | 51 | 30 | 58.82% | 82.2 yrs |
| Susquehanna | 73 | 25 | 34.25% | 90.5 yrs |
| Greene | 50 | 25 | 50.00% | 41.2 yrs |
| Berks | 31 | 23 | 74.19% | 74.2 yrs |
| Butler | 40 | 21 | 52.50% | 59.3 yrs |
| Somerset | 32 | 18 | 56.25% | 69.1 yrs |
| Chester | 43 | 17 | 39.53% | 63.0 yrs |
| Allegheny | 46 | 16 | 34.78% | 62.5 yrs |
| Blair | 18 | 15 | 83.33% | 105.8 yrs |
| Carbon | 16 | 14 | 87.50% | 76.3 yrs |
| Fayette | 29 | 14 | 48.28% | 87.7 yrs |
| Tioga | 20 | 14 | 70.00% | 59.3 yrs |
| Bucks | 32 | 14 | 43.75% | 67.8 yrs |
| York | 29 | 14 | 48.28% | 69.6 yrs |
| Cambria | 23 | 13 | 56.52% | 81.2 yrs |
| Montgomery | 28 | 13 | 46.43% | 60.8 yrs |
| Mercer | 18 | 11 | 61.11% | 61.2 yrs |
| Bradford | 32 | 11 | 34.38% | 69.0 yrs |
| Clearfield | 19 | 10 | 52.63% | 77.9 yrs |
| Wyoming | 14 | 10 | 71.43% | 94.6 yrs |
| Lancaster | 17 | 10 | 58.82% | 70.8 yrs |
| Centre | 13 | 10 | 76.92% | 63.8 yrs |
| Indiana | 15 | 9 | 60.00% | 65.6 yrs |
| Crawford | 24 | 8 | 33.33% | 67.5 yrs |
| Jefferson | 12 | 7 | 58.33% | 84.8 yrs |
| Lycoming | 12 | 7 | 58.33% | 73.9 yrs |
| Erie | 14 | 7 | 50.00% | 72.9 yrs |
| Snyder | 6 | 6 | 100.00% | 57.5 yrs |
| Adams | 14 | 6 | 42.86% | 59.2 yrs |
| Columbia | 11 | 6 | 54.55% | 77.2 yrs |
| Delaware | 9 | 5 | 55.56% | 84.9 yrs |
| Elk | 7 | 5 | 71.43% | 66.7 yrs |
| Lebanon | 13 | 5 | 38.46% | 109.3 yrs |
| Beaver | 16 | 5 | 31.25% | 79.5 yrs |
| Sullivan | 15 | 5 | 33.33% | 77.3 yrs |
| Bedford | 12 | 5 | 41.67% | 96.9 yrs |
| Clinton | 5 | 4 | 80.00% | 82.6 yrs |
| Armstrong | 14 | 4 | 28.57% | 74.9 yrs |
| Cumberland | 11 | 4 | 36.36% | 83.0 yrs |
| McKean | 7 | 4 | 57.14% | 92.8 yrs |
| Huntingdon | 10 | 4 | 40.00% | 76.1 yrs |
| Philadelphia | 7 | 3 | 42.86% | 90.2 yrs |
| Fulton | 4 | 3 | 75.00% | 73.0 yrs |
| Dauphin | 10 | 3 | 30.00% | 86.3 yrs |
| Lehigh | 9 | 3 | 33.33% | 75.1 yrs |
| Perry | 8 | 3 | 37.50% | 62.7 yrs |
| Warren | 3 | 3 | 100.00% | 64.7 yrs |
| Northampton | 13 | 3 | 23.08% | 78.1 yrs |
| Potter | 5 | 2 | 40.00% | 47.0 yrs |
| Venango | 5 | 2 | 40.00% | 53.5 yrs |
| Mifflin | 3 | 2 | 66.67% | 75.3 yrs |
| Northumberland | 4 | 2 | 50.00% | 110.3 yrs |
| Franklin | 9 | 2 | 22.22% | 66.4 yrs |
| Union | 4 | 1 | 25.00% | 39.7 yrs |
Purpose Breakdown
Tallest Dams in Pennsylvania
| Dam Name | Height | County | Hazard |
|---|---|---|---|
| Harmar Refuse Bank | 410 ft | Allegheny | High Hazard |
| Little Blue Run | 400 ft | Beaver | High Hazard |
| Cumberland No. 1 Slurry Pond 1 | 380 ft | Greene | High Hazard |
| Cumberland No. 2 Slurry Pond | 370 ft | Greene | High Hazard |
| Bailey Mine Area No. 3 Slurry | 337 ft | Greene | High Hazard |
| Bailey No. 8 Slurry Impoundment | 317 ft | Greene | High Hazard |
| Bailey Mine Slurry Impoundment | 315 ft | Greene | High Hazard |
| Emerald No. 1 Main Valley Eastern | 310 ft | Greene | High Hazard |
| Mathies Mine Refuse Area Pond #2 | 300 ft | Washington | High Hazard |
| Emerald No. 2 Main Valley Eastern | 270 ft | Greene | High Hazard |