TagCity of Auburn(7)

The Auburn Mitigation Site is an 80-acre wetland restoration project in the Green River floodplain, created by the Port of Seattle to offset natural resource impacts from Seattle-Tacoma International Airport's third runway construction. The site features forested, scrub-shrub, and emergent wetlands that provide 40 acre-feet of floodplain storage, while keeping waterfowl habitat away from the airport to reduce bird-strike hazards to aircraft. As of 2013, the Port was in Year 6 of a 15-year monitoring program, with most communities successfully maturing and meeting performance standards after targeted removal of invasive species such as reed canary grass and cattail.

In this March 20, 2001 email, Ann E. Kenny, a Senior Permitting Specialist at the Washington Department of Ecology, contacts Elizabeth Leavitt while working on a three-month Coastal Zone Management (CZM) status letter. Kenny requests copies of two key documents: a shoreline exemption letter issued by the City of Auburn on 8/9/00, and air quality compliance documentation including a Governor's Certification from 6/30/97 and a PSCAA permit from 9/21/99.

Figure 7.2-10 showing groundwater contour elevations on the Auburn Wetland Mitigation Site as of March 8, 2000. Map displays piezometer locations (P-1 through P-23), groundwater contour lines with elevations ranging from approximately 45.5 to 48.5 feet, existing wetland areas, and existing ground surface contours near the Green River. Handwritten annotations reference spring groundwater levels, 0.15-foot

The City of Auburn agenda bill requesting City Council adoption of Ordinance 5128, which amends the Zoning Ordinance to add Section 18.48.110 establishing criteria for wetland mitigation construction unrelated to development projects within Auburn. The amendment was prompted by a request from the Port of Seattle to construct a wetland mitigation project in northeast Auburn