DESCRIPTION
City of Kent completed an initial phase of constructing a floodplain wetland off of Mill Creek that when complete, will provide 1.8 acres of floodplain habitat below the OHWM and 5.4 acres below the 100-year flood height near the confluence of the Green River at RM 23.7. The design was funded by SRFB #05-1519 and #10-1125. This phase of the project initiated restoration work including: conducting sediment studies, upland and riparian site preparation and underplanting the northern portion of the project site along Mill Creek and the Green River with more than 5,500 native plants(see Project Proposal 4.A and 4.C). Additional funding has been secured to complete construction beginning in 2016 that will include: 1000 LF of new off-channel habitat; 37 log structures designed to maximize salmon habitat; removal of invasive vegetation; improve > 5 acres of riparian and 2 acres of upland plantings to increase diversity, density and shading (17,061 willow and dogwood live stakes, and 12,904 containerized and bare-root native plants). Once complete, the overall restoration project will increase floodplain refuge habitat for Chinook and other salmonids, enhance riparian habitat, and increase floodplain storage. The side channel will be subject to backwater approximately 125 days/year when outmigrating salmon numbers are greatest. When water flows into the off-channel area, juvenile salmonids will find cover, food and protection from flood flows. Coho, Chinook, chum and pink salmon, cutthroat and steelhead trout populations make extensive use of Mill Creek.