SR 509 Completion Project BC-2

This is a draft conceptual restoration plan sheet (LS01) prepared by the Washington State Department of Transportation for the Puget Sound Gateway Program, SR 509/24th Ave. S. to S. 188th St. New Expressway Project, showing wetland mitigation at Barnes Creek in Des Moines, WA (T.22N. R.4E. W.M.). The plan, dated 11/22/2021 and marked 'Not for Construction' at 15% conceptual design, depicts restoration types, steep slope bioengineering, compost sock details, and sitewide functional requirements including preservation of Oregon Ash/Slough Sedge community and existing wetland buffers.
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