Dams in Washington County, Pennsylvania
67Total Dams
39High Hazard
16Significant
Dam Safety in Washington County, Pennsylvania
Washington County has 67 dams tracked in the National Inventory of Dams. Of these, 39 are classified as high hazard — meaning failure would probably cause loss of human life. Another 16 carry a significant hazard classification. Currently, 3 dams have a condition assessment of poor or unsatisfactory.
The average dam in Washington County is 67 years old. The most common purpose is recreation. The tallest dam is Mathies Mine Refuse Area Pond #2 at 300 ft.
Explore more: Oldest dams in Pennsylvania · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Mathies Mine Refuse Area Pond #2 | High | Fair | 300 | Other | 1982 |
| Mine No 84 - Pond 6 Main | High | Satisfactory | 185 | Other | 1980 |
| Horne No 5 Slurry | High | Satisfactory | 146 | Other | 1984 |
| Maple Creek Slurry Pond 1 | High | Satisfactory | 120 | Other | 1973 |
| Maple Creek #3 Slurry Pond #1 | High | Satisfactory | 115 | Other | |
| Robinson Fork (pa-647) | High | Satisfactory | 95 | Flood Risk Reduction | 1977 |
| Maple Creek Slurry Pond No 2 - A | High | Satisfactory | 91 | Other | 1978 |
| Pa-486 | High | Satisfactory | 86 | Flood Risk Reduction | 1979 |
| Maple Creek #3 Slurry Pond #2 | High | Satisfactory | 83 | Other | |
| Cross Creek (pa-661) | High | Satisfactory | 82 | Flood Risk Reduction | 1979 |
| Pa-485 | High | Satisfactory | 78 | Flood Risk Reduction | 1977 |
| Enlow Fork (pa-648) | High | Satisfactory | 76 | Flood Risk Reduction | 1987 |
| Pa-483 | High | Satisfactory | 74 | Flood Risk Reduction | 1973 |
| Harmon Creek (pa-484) | High | Satisfactory | 67 | Flood Risk Reduction | 1971 |
| Pa-480 | High | Satisfactory | 66 | Flood Risk Reduction | 1979 |
| Washington No 4 | High | Fair | 63 | Recreation | 1903 |
| Pa-479 | High | Satisfactory | 63 | Flood Risk Reduction | 1969 |
| Treated Water Pond | High | Satisfactory | 59 | Other | 1966 |
| Pa-481 | High | Satisfactory | 51 | Flood Risk Reduction | 1984 |
| Cross Creek (pa-662) | High | Satisfactory | 50 | Flood Risk Reduction | 1983 |
| Washington No 3 | High | Satisfactory | 48 | Grade Stabilization | 1895 |
| Jack Clutter | High | Satisfactory | 45 | Water Supply | 1983 |
| Canonsburg | High | Satisfactory | 45 | Recreation | 1943 |
| Maple Creek Silt Pond B | High | Satisfactory | 43 | Other | 1977 |
| Dutch Fork | High | Satisfactory | 42 | Recreation | 1959 |
| Maple Creek Silt Pond A | High | Satisfactory | 39 | Other | 1977 |
| Pa-482 | High | Satisfactory | 38 | Flood Risk Reduction | 1970 |
| Canonsburg No 2 | High | Poor | 36 | Recreation | 1932 |
| Cherry Valley | High | Poor | 33 | Recreation | 1947 |
| Dinsmore No 2 | High | Satisfactory | 27 | Recreation | 1909 |
| Cokeburg | High | Poor | 27 | Recreation | 1902 |
| Richardson | High | Satisfactory | 26 | Recreation | 1976 |
| Trax Farms | High | Fair | 26 | Irrigation | 1963 |
| Woodridge Lake | High | Satisfactory | 26 | Irrigation | 1957 |
| Mine No 84 - Pond 6 West Dike | High | Satisfactory | 26 | Other | |
| Washington School | High | Fair | 23 | Flood Risk Reduction | 1976 |
| Ashton South | High | Fair | 19 | Recreation | |
| Lake Jo-ann | High | Satisfactory | 16 | Recreation | 1950 |
| Mine No 84 - Pond 6 East Dike | High | Satisfactory | 10 | Other | |
| Duck Pond | Significant | Fair | 59 | Other | 1983 |
| Maxwell Locks And Dam | Significant | Not Available | 56 | Navigation | 1964 |
| Mitchell Sludge Sedimentation Pond | Significant | Satisfactory | 50 | Other | 1982 |
| Emerald Lake | Significant | Satisfactory | 38 | Recreation | 1912 |
| Marshall Reservoir No. 2 | Significant | Satisfactory | 37 | Recreation | 1928 |
| Canonsburg No 1 | Significant | Fair | 36 | Recreation | 1911 |
| Mine No 84 - Pond 7 | Significant | Fair | 36 | Debris Control | 1980 |
| Mathies Sediment Pond No 5 | Significant | Fair | 33 | Other | 1982 |
| Waterfall Way Detention Basin | Significant | Satisfactory | 27 | Flood Risk Reduction | |
| Bells Lakes | Significant | Fair | 26 | 1964 | |
| Glencannon Pond | Significant | Fair | 24 | Flood Risk Reduction | |
| Smith And Ponzo | Significant | Fair | 24 | Recreation | 1939 |
| Orchard Hill | Significant | Satisfactory | 23 | Flood Risk Reduction | 1965 |
| Timber Lake | Significant | Fair | 17 | Flood Risk Reduction | 1990 |
| Lake Di Cio | Significant | Satisfactory | 15 | Recreation | 1953 |
| Simon Pond | Significant | Satisfactory | 0 | Recreation | |
| Hobo Ventures | Low | Fair | 118 | ||
| North Slurry Pond | Low | Not Available | 100 | Tailings | |
| South Slurry Pond | Low | Not Available | 60 | Tailings | |
| Nemacolin | Low | Fair | 46 | Irrigation | 1964 |
| Andy | Low | Satisfactory | 35 | Recreation | |
| Sedimentation Pond No. 8a | Low | Not Available | 25 | Other | |
| Starpointe | Low | Fair | 25 | Recreation | 1940 |
| Timber Lake B | Low | Fair | 25 | Recreation | 1956 |
| Raw Water Pond | Low | Fair | 25 | Grade Stabilization | 1968 |
| Morganza | Low | Satisfactory | 24 | Flood Risk Reduction | 1991 |
| Chambers | Low | Fair | 17 | Recreation | 1820 |
| Steel | Low | Satisfactory | 15 | Grade Stabilization | 1953 |