TagEIS(62)

A 1998 letter from Fisheries Consultants to the U.S. Army Corps of Engineers concludes that SeaTac Airport's proposed Third Runway will have an overall neutral effect on aquatic habitat and fish populations in Miller Creek. Minor benefits are expected from new storm flow detention facilities, which will reduce peak flood flows by 5–20%, and from a planned 100-foot-wide stream buffer created through residential buyouts along the creek. Adverse impacts are limited to the temporary disruption of a quarter-mile creek relocation and an approximate 8% reduction in late-summer low stream flows due to increased paved surfaces and wetland fill.

This 1997 Final Supplemental Environmental Impact Statement (SEIS) examines the environmental effects of proposed expansion plans at Seattle-Tacoma International Airport, including construction of a new third parallel runway, terminal improvements, and parking upgrades. The study was prompted by faster-than-expected growth in air travel demand during the mid-1990s, which exceeded earlier forecasts and required updated analysis of noise, air quality, wetland, and community impacts. The document was jointly prepared by the FAA and the Port of Seattle to ensure the proposed developments met federal and Washington State environmental policy requirements.

This document is part of the Final Supplemental Environmental Impact Statement for Seattle-Tacoma International Airport, addressing public comments on aviation demand forecasts and runway capacity planning. It explains how the 'Do-Nothing' and 'With Project' (Third Runway) alternatives were evaluated based on projected passenger and operations data through 2010, noting that the existing airfield has a maximum capacity of 460,000 annual operations. The document also acknowledges the inherent uncertainty in long-range aviation forecasts and clarifies that neither NEPA nor SEPA require the use of worst-case data in environmental reviews.

This technical report supplements the Final Environmental Impact Statement for Seattle-Tacoma International Airport's Master Plan Update, focusing on construction impacts related to the proposed Third Runway and associated projects. It analyzes fill material requirements estimated at 17.25 million cubic yards, haul routes, and truck traffic volumes, noting that the construction timeline was extended from three to five years, which reduced the number of average daily truck trips compared to earlier estimates. The report examines both on-site and off-site material sources and assesses potential traffic congestion impacts on regional roadways during the construction period.

This 1997 Final Supplemental Environmental Impact Statement evaluates the environmental effects of proposed expansion projects at Seattle-Tacoma International Airport, including construction of a new 8,500-foot third parallel runway, terminal improvements, and expanded parking and cargo facilities. The document examines potential impacts such as wetland disturbance, floodplain encroachment, stream relocation, and air, water, and noise quality effects on surrounding communities. It was prepared jointly under the National Environmental Policy Act and Washington State Environmental Policy Act to address concerns arising from continued growth in aviation activity levels.

This 1997 Final Supplemental Environmental Impact Statement (SEIS) evaluates the environmental effects of proposed expansion projects at Seattle-Tacoma International Airport, including the construction of a new 8,500-foot third parallel runway, terminal improvements, parking expansions, and cargo facilities. The document addresses a range of potential impacts such as noise, air and water quality, wetlands, and floodplains resulting from increased aviation activity. It was prepared jointly under federal (NEPA) and Washington State (SEPA) environmental review requirements by the Port of Seattle and the Federal Aviation Administration.

Comments submitted by the Airport Communities Coalition—comprising the cities of Burien, Des Moines, Federal Way, Normandy Park, Tukwila, and Highline Public Schools—on the Draft Supplemental Environmental Impact Statement for the proposed Master Plan Update Development Actions at Seattle-Tacoma International Airport. The document was prepared by Cutler & Stanfield, L.L.P. as counsel to the coalition, in

This 1997 document argues that the Port of Seattle's Environmental Impact Statement (EIS) for a proposed third runway at Sea-Tac Airport inadequately examines impacts on wetlands and fails to prescribe sufficient mitigation measures. It contends that the FAA and Port must meet federal and state legal requirements — including Section 404 of the Clean Water Act and Washington's Growth Management Act — before any construction affecting wetlands can proceed. The document asserts that the EIS does not consider a broad enough range of alternatives, making it legally insufficient as a basis for approving the runway project.

A 1997 study commissioned by cities and institutions near Seattle-Tacoma International Airport found that airport operations depress nearby property values compared to similar homes elsewhere in King County, and that properties directly under flight paths suffer additional losses from noise, visual pollution, and reduced quality of life. Researchers compared single-family homes around Sea-Tac with comparable homes in Northwest King County (Shoreline area), using strict criteria to ensure fair comparisons. The study notes that while overall regional growth means nearby home values may still rise over time, they appreciate more slowly than they would without the airport's presence.

This 1996 Memorandum of Agreement establishes a 24-month air quality monitoring program near Seattle-Tacoma International Airport, involving the Port of Seattle, FAA, EPA, Washington State Department of Ecology, and the Puget Sound Air Pollution Control Agency. The program, funded at $195,000, focuses on measuring carbon monoxide, nitrogen oxides, and aircraft fuel particle residue to establish baseline air quality data and evaluate potential pollution impacts from planned airport expansion projects. The Port agreed not to proceed with expansion elements projected to cause carbon monoxide standard violations until monitoring is complete and, if necessary, mitigation measures are identified.