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Aug. 16, 2011: SR 520 Replacement Project - WSDOT Peninsula Mitigation Site (Adjacent to Arboretum) for West Approach Portion (Project #3012587). Shoreline Substantial Development Permit to create 5.3 acres of wetland, and to enhance 1.3 acres of existing wetland and 2.3 acres of wetland buffer in an environmentally critical area. Project includes grading of 28,200 cu. yds. of material. Environmental documents prepared by Washington State Department of Transportation (WSDOT) and the Federal Highway Administration.

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