TagSEPA(293)

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.

Des Moines resident Jeffrey Bogen submitted a formal comment arguing that the Seattle-Area Metroplex Environmental Impact Statement's noise analysis is legally inadequate because it relies solely on a federal average-noise metric (DNL) rather than Washington State's broader, multi-factor significance standard. Bogen contends that with roughly 96 additional flights per day projected by 2037, residents will experience more frequent individual noise disruptions — including sleep disturbance and cardiovascular stress — that the DNL metric is mathematically incapable of detecting. He calls on the Port of Seattle to supplement its Final EIS with event-level and nighttime noise metrics supported by peer-reviewed health research, including the FAA's own National Sleep Study.

The Port of Seattle presented a Sustainable Airport Master Plan (SAMP) Near-Term Projects update to commissioners on May 26, 2026, covering both federal (NEPA) and state (SEPA) environmental review processes for planned expansions at Seattle-Tacoma International Airport. The projects include new terminals, taxiway extensions, cargo facilities, a fuel farm expansion, and other infrastructure improvements spread across the airport campus. The presentation outlined the completion of a Final Environmental Assessment and FAA Finding of No Significant Impact, as well as the next steps for a Draft SEPA Environmental Impact Statement and community outreach.

The Port of Seattle presented a draft Environmental Impact Statement under Washington State's environmental review law (SEPA) for a set of near-term construction projects at Seattle-Tacoma International Airport. The projects, part of the Sustainable Airport Master Plan, include expansions and improvements such as new gates, taxiway extensions, a second terminal, cargo facilities, and roadway upgrades. The presentation outlined the environmental review process and next steps, including public outreach and engagement.

The Port of Seattle released a Draft Environmental Impact Statement (DEIS) under the State Environmental Policy Act (SEPA) for near-term construction and expansion projects at Seattle-Tacoma International Airport, finding that surface transportation would face significant impacts while noise and air quality impacts would remain within legal health standards. A 60-day public comment period runs from May 22 to July 21, 2026, with in-person meetings in SeaTac, Burien, Des Moines, and Federal Way, plus virtual options and multilingual outreach. A Final Environmental Impact Statement is expected by the end of 2026.

Presentation about the Port of Seattle’s Sustainable Airport Master Plan Near-Term Projects, covering the completed NEPA process and the required SEPA Draft Environmental Impact Statement. The document outlines various airport infrastructure projects including runway improvements, terminal facilities, maintenance facilities, and cargo operations planned for Sea-Tac Airport.