Channel Stabilization and Retrofitby Ken Nilsen, King County Public Works, Seattle, United States,
Abstract: In 1990 King County Surface Water Management Division completed the Soos Creek Basin Plan. This basin was one of the most rapidly developing areas in the State of Washington. The goal of this basin plan was to develop capital improvement projects and land use controls that would eliminate and/or reduce flooding, erosion and the degradation of water quality and valuable natural resources in the area. This retrofit project was recommended in the Plan to correct severe erosion and sedimentation problems due to inadequate urban drainage stormwater outfalls and conveyance systems that were impacting salmon spawning grounds, a nearby salmon hatchery, and raising potential public safety concerns. During the projects conceptual alternative analysis and review phase, the opportunity was also identified to retrofit existing urban drainage facilities with best management practices to improve stormwater quality.
Subject Headings: Stormwater management | Rehabilitation | Water quality | Channel stabilization | Water resources | Quality control | Municipal water | Basins | Urban development | Washington | North America | United States
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