TagThird Runway(1067)

The Port of Seattle requested $720,000 in Commission authorization to improve the Auburn wetland mitigation site, a nature area created to offset environmental impacts from Sea-Tac Airport's Third Runway construction. The project involves removing roughly 6,171 feet of temporary internal roads, planting approximately 5,000 native trees and shrubs in their place, and installing a new chain-link security fence to stop ongoing trespassing, vandalism, and illegal dumping. These enhancements are required to comply with Clean Water Act permits tied to the 1997 Master Plan Update and are intended to reduce long-term maintenance costs.

Handwritten notes dated 2/13 document a phone call at 9:56 AM regarding fill and runway notification related to a sales tax exemption, referencing figures of 1,500 and 10/5/2000. The notes also address Reports of Remedial Action concerning tax exemption copies, a Bellevue Site with TPH contamination, and 1,500 tons of suspected contaminated soils transported to three RW sites. A 4:00 PM follow-up call with Pete confirmed that soil was removed from three RW project areas for treatment (ISR) shortly after it was placed.

This map, prepared by Landrum & Brown for the Port of Seattle's 14 CFR Part 150 Study Update, shows projected aircraft noise exposure around Seattle-Tacoma International Airport for the year 2018. It illustrates three noise contour zones (DNL 65, 70, and 75 dBA), with the total area above DNL 65 dBA covering approximately 7.3 square miles and affecting an estimated 3,771 housing units and 9,712 residents. The map also identifies noise-sensitive land uses such as schools, churches, hospitals, and libraries within the affected area, and was certified by the Port of Seattle's Director of Aviation Planning and Environmental Programs.

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.

This document contains the agenda for the November 28, 2012 Highline Forum meeting held at the Tukwila Community Center, along with draft minutes from the September 26, 2012 joint meeting with the SKCEDI Executive Committee. Key topics included a conversation with Highline School District Superintendent Dr. Susan Enfield, a Port of Seattle update on the Part 150 noise study, and a Q&A session with state legislators on economic development and education funding. The Part 150 Study, which addresses aircraft noise mitigation around Sea-Tac Airport, was listed as a standing update item presented by Port of Seattle representative Mark Reis.