Dams in Cowlitz, Washington

14
Total Dams
4
High Hazard
1
Significant
50.8 yrs
Avg Age
Hazard Name Height
Dam Name Hazard Height Built Type State
Merwin Cowlitz High Hazard 313 ft 1931 Arch Washington
South Fork Mccorkle Creek Detention Dam Cowlitz High Hazard — 1989 Earth Washington
Mount St. Helens Sediment Retention Structure Cowlitz High Hazard 186 ft 1988 Earth Washington
Yale Cowlitz High Hazard 323 ft 1953 Earth Washington
Headquarters Landfill Leachate Pond Cowlitz Significant Hazard — 1993 Earth Washington
Coweeman Gravel Pit No. 2 Dam Cowlitz Low Hazard — 1962 Earth Washington
Longview Sewage Lagoon No 4 Cowlitz Low Hazard — 1987 Earth Washington
Longview Sewage Lagoon No 3 Cowlitz Low Hazard — 1987 Earth Washington
Longview Sewage Lagoon No 1 Cowlitz Low Hazard — 1986 Earth Washington
Silver Lake Dam Cowlitz Low Hazard — 1971 Earth Washington
Longview Sewage Lagoon No 2 Cowlitz Low Hazard — 1986 Earth Washington
Swift No 2 Hydroelectric Project Cowlitz Low Hazard 106 ft 1959 Earth Washington
Coldwater Debris Dam Cowlitz Unknown 200 ft 1981 Earth Washington
Castle Lake Debris Dam Cowlitz Unknown 190 ft 1980 Earth Washington