Figure 5. Mitigation of post-1980 sediment transport along the Toutle-Cowlitz River system. (A) Sediment dredging along Cowlitz River. Photograph by Lyn Topinka, USGS, February 5, 1981. (B) Sediment retention structure constructed on North Fork Toutle River valley. Photograph by Bill Johnson, U.S. Army Corps of Engineers. From Major et al. (2005).
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