Dams in Grays Harbor County, Washington
14Total Dams
9High Hazard
3Significant
Dam Safety in Grays Harbor County, Washington
Grays Harbor County has 14 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 3 carry a significant hazard classification. Currently, 5 dams have a condition assessment of poor or unsatisfactory.
The average dam in Grays Harbor County is 78 years old. The most common purpose is water supply. The tallest dam is Wynoochee at 175 ft.
Explore more: Oldest dams in Washington · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Wynoochee | High | Satisfactory | 175 | Water Supply | 1972 |
| Malinowski Dam | High | Satisfactory | 51 | Water Supply | 1963 |
| Fairview Reservoir No 1 | High | Poor | 35 | Water Supply | 1915 |
| Aberdeen Lake Dam | High | Satisfactory | 33 | Recreation | 1928 |
| College Hill Reservoir | High | Poor | 31 | Water Supply | 1899 |
| Beacon Hill Reservoir | High | Poor | 30 | Water Supply | 1935 |
| Fairview Reservoir No 2 | High | Fair | 25 | Water Supply | 1921 |
| Swano Lake Dam | High | Poor | 24 | Fish and Wildlife Pond | 1949 |
| Mill Creek Dam Cosmopolis | High | Satisfactory | 20 | Fish and Wildlife Pond | 2019 |
| Sylvia Lake Dam Grays Harbor Cnty | Significant | Poor | 23 | Recreation | 1918 |
| West Fork Dam | Significant | Fair | 16 | Water Supply | 1956 |
| Spoils Pond Dam | Significant | 14 | Other | 1970 | |
| Failor Lake Dam | Low | 32 | Recreation | 1956 | |
| Sea Horse Ranch Dike | Low | 15 | Other | 1961 |