TagDes Moines(254)

A Des Moines, WA resident and airport advisory committee member submitted this public comment challenging the noise analysis in the Sea-Tac Airport (SEA) expansion environmental review, arguing that the standard Day-Night Average Sound Level (DNL) metric used by the Port of Seattle fails to capture the true burden of aircraft noise on nearby communities. Using direct measurements from Port noise monitors, the analysis found that some locations currently experience around 529 noise events per day with a median gap of only 1.5 minutes between events, conditions projected to worsen significantly under the airport's own growth forecasts. The comment calls on the Port to supplement its environmental review with event-based noise metrics—such as event frequency, quiet-period gaps, and nighttime disturbances—that research links more directly to health impacts like sleep disruption and cardiovascular disease.

A Des Moines resident's formal comment argues that the Seattle-Area Metroplex Environmental Impact Statement's noise analysis is legally inadequate because it relies solely on a federal FAA noise threshold rather than Washington State's own multi-factor significance standard. The comment contends that the standard noise metric used (DNL) masks the real impact of roughly 96 additional daily flights projected by 2037, since it averages out individual disturbance events rather than counting them. The commenter calls for supplemental analysis using alternative metrics—such as single-event sound levels and nighttime averages—supported by peer-reviewed health studies linking aircraft noise to sleep disruption and cardiovascular harm.

A Des Moines resident submitted a formal comment arguing that the Seattle-Area Metroplex Environmental Impact Statement (SAMP EIS) significantly underestimates the health risks of aviation noise by omitting key peer-reviewed studies linking aircraft noise to cardiovascular disease, heart structural changes, and sleep disruption. The commenter contends that the EIS relies on outdated and methodologically flawed research, particularly FICAN studies using extrapolated rather than measured data, while ignoring more recent findings from the WHO, the HYENA Project, and a 2025 cardiac MRI study. The comment calls on the FAA to conduct a proper cumulative health effects analysis and require additional noise mitigation measures beyond the current DNL 65 dB contour threshold.

The Des Moines Airport Advisory Committee met on April 13, 2026, and is scheduled to meet again on May 11, 2026, to discuss issues related to Seattle-Tacoma International Airport's impact on the Des Moines, Washington community. Key agenda topics include updates on the Sustainable Airport Master Plan (SAMP) and its Draft Environmental Impact Statement, as well as a proposed workplan amendment covering noise and traffic mitigation measures, public education efforts, and a community survey. The committee also seeks a more comprehensive traffic analysis that accounts for impacts from the completed WSDOT Highway 509 project.

Agenda for the Des Moines Airport Advisory Committee meeting covering approval of minutes, complaints/communications, StART meeting update, SAMP update, and workplan amendment discussion. Includes items about supporting city response to SAMP Draft EIS, public education efforts, and mitigation measures research.

This document outlines educational resources available to teachers for a community planning project in the Highline/Sea-Tac area, circa 1973. Resources include in-service training sessions, TV video tapes on topics such as noise pollution and urban streams, field trips to local sites including the airport, and class projects like noise samplings and drainage demonstrations. Study materials cover community trends, open space, environmental reports, and land use policy guides produced by the Environmental Development Commission and the League of Women Voters.