BAC SP #2 Misc 0015

Port of Seattle Aviation and Sustainability Department P.O. Box 68727 Seattie, WA 98168 RE: DNS for Concourse D Hardstand Holdroom Port of Seattle SEPA File Number 17-02 The City of Des Moines appreciates the opportunity to comment on the SEPA Determination of Nonsignificance {DNS) dated June 6, 20:17 for the Concourse D Hardstand Holdroom project. The project documents indicate that the Concourse D Hardstand Holdroom is intended to serve existing passenger levels, however, the environrnental checklist also notes that Sea-Tac airport has experienced rapid growth in both passengers and aircraft operations in the past few years which is maximizing use of terminal holdrooms and airplane gate capacity. The environmental checklist further indicates that current estimates and near-term forecasts of gate capacity and demand show increasing gate short falls. It appears that the facility is anticipated to serve current operations as well as future growth. It is unclear where this proposal fits in the context of the Sustainable Airport Master Plan in addressing future passenger growth, needed passenger handling facilities, and appropriate mitigation. The DNS should clarify how this proposed enhancement to airport facilities is related to future growth and the Sustainable Airport Master Planning process. The City of Des Moines experiences disproportionate impacts from aircraft operations because of our proximity to Sea-Tac International airport, and Des Moines residents are constantly challenged by noise and health impacts. As a result, the City continues to request that any enhancements to the airport facilities are thoroughly analyzed in a comprehensive manner for impacts…
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