Dams in Lancaster County, Pennsylvania
18Total Dams
9High Hazard
1Significant
Dam Safety in Lancaster County, Pennsylvania
Lancaster County has 18 dams tracked in the National Inventory of Dams. Of these, 9 are classified as high hazard — meaning failure would probably cause loss of human life. Another 1 carry a significant hazard classification. Currently, 1 dams have a condition assessment of poor or unsatisfactory.
The average dam in Lancaster County is 74 years old. The most common purpose is recreation. The tallest dam is Muddy Run Recreation Dam at 90 ft.
Explore more: Oldest dams in Pennsylvania · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Pine Grove | High | Fair | 65 | Hydroelectric | 1949 |
| Holtwood Ses Ash Basin No 2 | High | Fair | 57 | Other | 2000 |
| New Holland Reservoir | High | Fair | 40 | Water Supply | 1953 |
| Speedwell Forge | High | Satisfactory | 35 | Recreation | 1966 |
| Barnett | High | Fair | 26 | Recreation | |
| Middle Creek | High | Poor | 18 | Recreation | 1971 |
| Manheim Twp Detention Basin No 2 | High | Satisfactory | 15 | Flood Risk Reduction | 1981 |
| Gable Park Woods | High | Satisfactory | 10 | Flood Risk Reduction | |
| Lake Placida | High | Satisfactory | 6 | Recreation | 1910 |
| Safe Harbor | Significant | Satisfactory | 75 | Hydroelectric | 1930 |
| Muddy Run Recreation Dam | Low | Satisfactory | 90 | Hydroelectric | 1967 |
| Holtwood | Low | Satisfactory | 55 | Hydroelectric | 1910 |
| Low | Not Available | 31 | Recreation | 1968 | |
| York Haven Headrace | Low | Satisfactory | 20 | Hydroelectric | 1904 |
| Sadsbury Twp Detention Pond 1 | Low | Not Rated | 15 | Flood Risk Reduction | 1982 |
| Muddy Run East Dike | Low | Satisfactory | 12 | Hydroelectric | 1967 |
| Woods Edge - Pond A | Low | Not Rated | 11 | Flood Risk Reduction | |
| Groff Mill | Low | Not Rated | 8 | Recreation | 1919 |