TagEnvironmental Impact Statement(325)

A 2003 Port of Seattle memo updates the Commission on the ballooning costs of the Sea-Tac Third Runway project, which had grown from an approved budget of $773 million to an estimated $1.1–1.15 billion due to environmental permitting delays, litigation, and stricter regulatory requirements. The project, intended to reduce airport congestion by allowing simultaneous landings on two runways during poor weather, was projected for completion in 2008 if construction contracts were advertised promptly. Key cost drivers included $151 million in additional environmental permit requirements, $55 million in delay costs, and $55 million in project scope additions.

This document is a catalog of 31 reports and studies published in 1999 related to Sea-Tac Airport expansion and environmental review, including wetland assessments, stormwater monitoring, subsurface conditions reports, and community health studies. Sources range from the Port of Seattle and U.S. Army Corps of Engineers to environmental consultants such as Parametrix and Hart Crowser. The materials primarily concern the proposed third runway project and its impacts on local ecosystems, waterways, and surrounding communities.

This document is a bibliography listing published reports, environmental impact statements (EIS), and other key planning documents related to the Port of Seattle's U.S. Army Corps of Engineers 404 permit for Seattle-Tacoma International Airport (Sea-Tac), covering the period 1993–2001. It catalogs a wide range of studies including runway construction specifications, wetland mitigation plans, stormwater pollution prevention, safety area improvements, and master plan updates. Each entry identifies the document's author, finish date, and a Corps file number where applicable.

This 2002 executive briefing presents the draft Master Plan and environmental review documents (SEPA/EIS and NEPA/EA) for King County International Airport (Boeing Field), located five miles south of downtown Seattle. The airport, which covers 594 acres and hosts 150 tenant businesses and 479 based aircraft, recorded approximately 290,000 flight operations in 2001. The FAA accepted the Master Plan in Fall 2001 and approved the Airport Layout Plan in March 2002, setting the stage for future development and noise impact assessments.

AR028014. Port of Seattle biological assessment map depicting wetland and stream impacts in the Miller Creek Basin related to the Seattle-Tacoma International Airport Third Runway project. Shows delineated wetlands verified by Army Corps of Engineers (ACOE), wetlands not verified by ACOE, creeks, boundary of acquisition area, third runway and interconnecting taxiways, third runway embankment and

Port Of Seattle Commission Resolution No. 3212, As Amended, adopting the Airport Master Plan Update for Seattle-Tacoma International Airport (STIA), approving development of a new 8500-foot dependent air carrier runway with centerline located no further than 2500 feet west of runway 16L/34R, and committing to additional noise reduction measures per Puget Sound Regional Council Resolution

Resolution No. 3211 of the Port Commission of the Port of Seattle, King County, Washington, repealing sections 15.4 and 21 and subsections 21.1, 21.2, 21.3, 21.4, and 21.5 of Port Resolution 3028, and adopting new SEPA administrative appeal procedures under ch. 43.21C RCW and chapter 197-11 WAC. Establishes appealable SEPA decisions (EIS adequacy and issuance

Attachment G table detailing wetland acreage impacts and mitigation credits by wetland function for in-basin and Auburn sites, related to the Sea-Tac Airport or associated project. Functions covered include Resident/Anadromous Fish (8.6 acres impacted), Passerine Birds (14.9 acres), Waterfowl (1.9 acres), Amphibians (9.8 acres), Small Mammals (13.2 acres), Exports Organic Matter (10.9 acres), Ground Water

AR 035003. Attachment F table comparing wetland mitigation projects — Vacca Farm, Miller Creek Buffer, Tyee Golf Course, and Auburn Wetland — against Society of Wetland Scientists (SWS) criteria including reinstatement of driving ecological processes, restoration integrated into the landscape, restores a persistent resilient system, results in historic wetland conditions, and performance standards based on

Exhibit AR034998-AR035000, Attachment E: Summary table of compensatory mitigation (on-site and off-site) for watershed, wetland, and stream impacts at Seattle-Tacoma International Airport related to third runway embankment and South 154th Street relocation. Details on-site permanent impacts including filling approximately 980 linear feet of Miller Creek channel, filling 8,500 cy of Miller Creek floodplain, and filling