Dams in Cowlitz County, Washington
15Total Dams
5High Hazard
1Significant
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Yale | High | Fair | 323 | Hydroelectric | 1953 |
| Merwin | High | Fair | 313 | Hydroelectric | 1931 |
| Mount St. Helens Sediment Retention Structure | High | Not Available | 239 | Flood Risk Reduction | 1988 |
| Yale Saddle Dam | High | Unsatisfactory | 40 | Hydroelectric | 1953 |
| South Fork Mccorkle Creek Detention Dam | High | Fair | 22 | Flood Risk Reduction | 1989 |
| Headquarters Landfill Leachate Pond | Significant | Satisfactory | 19 | Other | 1993 |
| Swift No 2 Hydroelectric Project | Low | Satisfactory | 121 | Hydroelectric | 1959 |
| Silver Lake Dam | Low | 15 | Flood Risk Reduction | 1971 | |
| Coweeman Gravel Pit No. 2 Dam | Low | 12 | Recreation | 1962 | |
| Longview Sewage Lagoon No 4 | Low | 12 | Other | 1987 | |
| Longview Sewage Lagoon No 2 | Low | 11 | Other | 1986 | |
| Longview Sewage Lagoon No 3 | Low | 10 | Other | 1987 | |
| Longview Sewage Lagoon No 1 | Low | 9 | Other | 1986 | |
| Coldwater Debris Dam | Undetermined | Not Rated | 200 | Other | 1981 |
| Castle Lake Debris Dam | Undetermined | Not Rated | 190 | Other | 1980 |