15Total Dams
4High Hazard
1Significant
Dam Safety in Douglas County, Washington
Douglas County has 15 dams tracked in the National Inventory of Dams. Of these, 4 are classified as high hazard — meaning failure would probably cause loss of human life. Another 1 carry a significant hazard classification.
The average dam in Douglas County is 61 years old. The most common purpose is irrigation. The tallest dam is Chief Joseph Dam at 230 ft.
Explore more: Oldest dams in Washington · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Chief Joseph Dam | High | Not assessed | 230 | Hydroelectric | 1955 |
| Rock Island | High | Satisfactory | 71 | Hydroelectric | 1932 |
| Columbia River Orchard Reservoir 2 | High | Satisfactory | 13 | Irrigation | 2008 |
| Isaak Dam No 4 | High | Fair | 9 | Irrigation | 1987 |
| Lincoln Rock S.p. Evaporative Lagoons | Significant | Satisfactory | 15 | Other | 1981 |
| Lower Rimrock Dam | Low | Not assessed | 67 | Recreation | 1972 |
| Waterville Effluent Storage Pond | Low | Not assessed | 30 | Other | 1981 |
| Billingsley Dam | Low | Satisfactory | 15 | Flood Risk Reduction | 1949 |
| Jenkins Webley Dam | Low | Not assessed | 15 | Irrigation | 1945 |
| Mckay Dam | Low | Not assessed | 15 | Flood Risk Reduction | 1961 |
| Jorgensen Dam | Low | Not assessed | 10 | Irrigation | 1946 |
| Carl Malone Wildlife Pond | Low | Not assessed | 9 | Flood Risk Reduction | 1992 |
| Waterville Sewage Treatment Pond | Low | Not assessed | 8 | Other | 1954 |
| Sims Dam | Low | Not assessed | 7 | Flood Risk Reduction | 1960 |
| Kohne Dam No 2 | Low | Not assessed | 7 | Irrigation | 1950 |