TagEIS(62)

This March 1994 Final Environmental Impact Statement, prepared jointly by the Federal Aviation Administration's Seattle Airports District Office and the Port of Seattle, evaluates the proposed South Aviation Support Area at Seattle-Tacoma International Airport. The document assesses the potential environmental effects of developing aviation support facilities in the southern portion of the airport, covering impacts such as noise, land use, and related concerns. It was produced as part of the federally required environmental review process before any major airport infrastructure decisions could be approved.

A 1993 letter from the Port of Seattle to a Des Moines resident explains that airline deicing at Sea-Tac Airport uses only FAA-approved ethylene or propylene glycol, and that wastewater from deicing drains to the airport's treatment system before being discharged to Puget Sound — not to Miller or Des Moines Creeks. The Port acknowledged its treatment plant was not designed to handle glycols and was evaluating upgrades. A follow-up 1996 letter challenges a contradictory statement in the airport's Final Environmental Impact Statement, which claimed most deicing fluids were contained and treated by the Port's Industrial Wastewater System.

This document describes input data formats for the VS2D computer program, developed by the U.S. Geological Survey, which simulates fluid flow in variably saturated porous media. It details technical parameters for evaporation and evapotranspiration modeling, including variables for potential evaporation rates, rooting depth, root activity, and atmospheric pressure. The document also outlines time-step control settings used to manage the numerical simulation of subsurface water movement.

This August 1980 Draft Supplemental Environmental Impact Statement from King County's Division of Planning outlines proposed zoning changes for the Highline Community Plan, covering areas surrounding Seattle-Tacoma International Airport including White Center, Burien, and nearby neighborhoods. The document maps land proposed for rezoning across multiple subareas, with changes including downzones to single-family residential, conversions to multi-family or mixed use, and designations of land for potential future rezones. It serves as a planning tool to guide land use decisions in communities directly affected by airport noise and related impacts.

This April 1979 Final Environmental Impact Statement, prepared by the Port of Seattle's Planning and Research Department, evaluates the proposed initial development of a general and corporate aviation facility on the west side of Sea-Tac International Airport. The document was issued in compliance with Washington State's Environmental Policy Act of 1971 and incorporates findings from an earlier 1977 EIS related to a Weyerhaeuser corporate aviation facility on the same site. It was distributed to government agencies, citizen groups, and interested individuals to assess the environmental effects of the proposed development.

This March 1979 newsletter from the Westside Hilltop Area Survival Committee (WHSC) updates Hilltop Community residents on two key hearings: one opposing the Port of Seattle's proposed corporate aviation facility north of South 176th Street, and another challenging a requested rezone of 30 acres of westside greenbelt land near Sea-Tac Airport. The committee reaffirms its position that no airport development should proceed without proper community safeguards, and addresses rumors about residents' legal liability for the committee's activities. The newsletter also notes that the State Legislature approved legislation allowing the Port of Seattle to extend the airport impact zone to include the Hilltop area.

The Highline Communities Plan (HCP) is a King County land use and zoning proposal covering the area between Puget Sound and Interstate 5, from the City of Seattle south to South 252nd Street, including Des Moines and Normandy Park. Prepared by the King County Department of Planning and Community Development and issued in draft form in April 1977, the plan was intended to guide land use policy, area zoning, capital improvements, and housing programs for the Highline Communities Planning Area. Upon adoption, it became the official county policy framework for this coastal suburban region located adjacent to what is now Sea-Tac Airport.