Dams in Chester County, Pennsylvania
43Total Dams
17High Hazard
20Significant
Dam Safety in Chester County, Pennsylvania
Chester County has 43 dams tracked in the National Inventory of Dams. Of these, 17 are classified as high hazard — meaning failure would probably cause loss of human life. Another 20 carry a significant hazard classification. Currently, 4 dams have a condition assessment of poor or unsatisfactory.
The average dam in Chester County is 62 years old. The most common purpose is flood risk reduction. The tallest dam is Hankin at 100 ft.
Explore more: Oldest dams in Pennsylvania · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Marsh Creek Reservoir (pa-437) | High | Fair | 90 | Recreation | 1973 |
| Hibernia (pa-436f) | High | Fair | 65 | Flood Risk Reduction | 1994 |
| Barneston (pa 432) | High | Fair | 43 | Flood Risk Reduction | 1983 |
| Rock Run | High | Fair | 42 | Water Supply | 1917 |
| Pickering Creek | High | Fair | 36 | Water Supply | 1928 |
| Beaver Creek (pa-433) | High | Satisfactory | 36 | Flood Risk Reduction | 1975 |
| Township Line (airport Road) | High | Fair | 34 | Recreation | 1935 |
| Lake Somerset | High | Fair | 32 | Recreation | 1969 |
| R G Struble Lake (pa-431) | High | Satisfactory | 31 | Flood Risk Reduction | 1971 |
| Walker Farm Lagoon | High | Satisfactory | 26 | Other | 2002 |
| Wharton Boulevard Stormwater | High | Fair | 21 | Flood Risk Reduction | 1999 |
| Milltown | High | Fair | 20 | Water Supply | 1924 |
| Welkinweir | High | Fair | 16 | Recreation | 1937 |
| Herr Foods Storage Lagoon | High | Satisfactory | 15 | Other | 1996 |
| Wayne Glen | High | Not Rated | 14 | Flood Risk Reduction | |
| Lincoln Avenue Detention Basin | High | Satisfactory | 13 | Flood Risk Reduction | 2007 |
| Leopard Lake | High | Fair | 11 | Recreation | |
| Osborne Lagoon | Significant | Satisfactory | 50 | Other | 2012 |
| Wastewater Treatment | Significant | Fair | 45 | Other | 1985 |
| Chester Co. Prison Storage Lagoon | Significant | Satisfactory | 34 | Other | |
| Green Valley Farms | Significant | Fair | 23 | Recreation | 1963 |
| Timber | Significant | Satisfactory | 19 | Flood Risk Reduction | 1986 |
| Washburn Lake | Significant | Fair | 18 | Recreation | 1955 |
| Linpro Detention Basin | Significant | Fair | 18 | Flood Risk Reduction | 1987 |
| Malvern Preparatory Lower | Significant | Satisfactory | 15 | Recreation | 1923 |
| Westtown | Significant | Fair | 14 | Recreation | 1912 |
| Savery Mill | Significant | Fair | 14 | Recreation | 1960 |
| Hershey Mill | Significant | Fair | 14 | Recreation | 1748 |
| Crossing No 5 | Significant | Fair | 13 | Flood Risk Reduction | 2005 |
| Crossing No 3 | Significant | Fair | 13 | Flood Risk Reduction | |
| Whitford Ridge Detention Basin | Significant | Fair | 13 | Flood Risk Reduction | 1992 |
| Somerset Lakes Basin No 2 | Significant | Fair | 12 | Flood Risk Reduction | 1991 |
| West Whiteland Business Park | Significant | Poor | 12 | Flood Risk Reduction | |
| Brook Crossing Detention | Significant | Fair | 11 | Flood Risk Reduction | |
| Pond View Farm | Significant | Poor | 10 | Recreation | 1960 |
| Devon Detention | Significant | Fair | 8 | Flood Risk Reduction | 1986 |
| Thomas Meeting Detention Basin | Significant | Fair | 5 | Flood Risk Reduction | 1990 |
| Hankin | Low | Fair | 100 | Flood Risk Reduction | 1989 |
| Pond No 1 | Low | Fair | 71 | Tailings | 1970 |
| Pond No 2 | Low | Poor | 36 | Tailings | |
| Cold Springs Park | Low | Poor | 30 | Recreation | |
| Pond No 3 | Low | Fair | 28 | Tailings | |
| Pine Grove | Low | Not Rated | 10 | Recreation | 1919 |