The U.S. Army Corps of Engineers has been reviewing a permit application related to a proposed third runway at Sea-Tac Airport, described as the largest Section 404 proceeding the Corps had handled and the biggest public works project in Washington State since the Grand Coulee Dam. Key issues under consideration include the replacement of lost wetlands, streamflow impacts, and the seismic stability of the proposed runway embankment. No deadline exists for the Corps to render its final decision, though draft permit conditions were reportedly being prepared by civilian technicians in the Seattle District Office.Open full document
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This document discusses the U.S. Army Corps of Engineers’ review of a third runway application at Sea-Tac Airport, describing the large volume of materials under consideration including issues of public need, runway embankment stability, and federal water-quality and wildlife standards. It outlines potential topics for conditions in a Section 404 permit, including wetlands replacement, streamflow requirements, and embankment issues such as contaminated fill and seismic stability. The document is authored by RCAA (Residents for Compromise at the Airport).