Urban Corridors On-Call, I-405 and I-90 Corridors

King County, Washington State Department of Transportation (WSDOT)

WSDOT’s Urban Corridors group under took environmental discipline reports in support of four Environmental Assessments, Wetland/Biology reports, and wetland mitigation plans. ESA worked with WSDOT under nine task orders for this on-call contract to conduct wetland investigations and mitigation planning, mitigation construction drawings, and provide permit support along the I-405 and I-90 corridors. ESA prepared a variety of reports and studies, including wetland reconnaissance and delineation, state and local rating, and functional assessments in accordance with the WSDOT Environmental Procedures Manual.