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Sediment Plan

Posted on 22nd August 2014 at 08:38

The U. S. Army Corps of Engineers is now looking for your input on a draft plan for managing flood risk in cities along the Cowlitz River through 2035. The draft Supplemental Environmental Impact Statement and Mount Saint Helens Long-Term Sediment Management Plan looks at several alternatives for management of flood risk for Castle Rock, Lexington, Kelso and Longview, building on the original plan that was approved in 1985. In that plan, there was recognition that additional work would be needed, involving other actions besides dredging in the lower part of the Cowlitz. In addition to a “No Action” alternative, three other alternatives are being considered, including Cowlitz River dredging only, raising of the spillway and embankment of the Sediment Retention Structure, and a phased plan that would include raising of SRS spillway crest, grade-building structures and “as-needed” dredging. The phased plan is the preferred alternate of the Corps, who says that this plan includes the specific actions and necessary flexibility for managing the Cowlitz River flood risk. The full text is available on the Corps website; open houses on the proposed plan are planned for September 10th at the Cowlitz County Expo Center and on September 17th at Toutle Lake High School. Comments are being accepted through October 6th.