This 1987 Draft Environmental Impact Statement from the Puget Sound Council of Governments evaluates alternatives for expanding the regional airport system in the Puget Sound area through the year 2020. The study found that all alternatives would generate significant impacts to both natural and human environments, including noise and land-use concerns, with the key distinction being whether those impacts would be concentrated at existing airport sites or spread across new locations. No single alternative was found to be clearly superior, and the report called for extensive mitigation measures and further site-specific analysis to guide final decision-making.Open full document
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A Nonproject Environmental Impact Statement prepared by the Puget Sound Council of Governments in December 1987, describing potentially significant environmental impacts from implementing regional airport alternatives in the Puget Sound region. The document summarizes the update of the Regional Airport System Plan (RASP), extending its planning horizon from 2000 to 2020, and evaluates alternatives for providing airport facilities while mitigating operational impacts.