TagSea-Tac Airport(2010)

A Des Moines resident's formal comment on the Seattle-Area Metroplex Environmental Impact Statement argues that Sea-Tac Airport's official planning assumption — that average aircraft size will grow by only 0.5% per year — is mathematically incompatible with the airport's own goal of 56 million annual passengers by 2032. The comment shows that reaching that passenger target under the current assumption would require roughly 880,000 flights per year, far exceeding the airport's infrastructure ceiling of about 517,000 operations. The author contends that airlines like Alaska and Delta are already ordering larger aircraft and expanding international routes at Sea-Tac, meaning faster fleet upgauging is not a worst-case scenario but a necessity for the plan to make sense.

A Des Moines resident's formal comment on the Sea-Tac Airport Master Plan (SAMP) Environmental Impact Statement argues that the SAMP's aircraft seat capacity assumptions are now outdated, pointing to major 2026 fleet expansions by Alaska Airlines and Delta that include significantly more and larger widebody aircraft operating from SEA. The comment contends that because larger planes carry more passengers per flight, fewer total aircraft operations would be needed to reach the SAMP's 56 million passenger target, meaning the airport could handle projected growth with less noise impact than the SAMP currently estimates. The author presents revised seat-capacity scenarios suggesting the SAMP's low-growth assumption is internally inconsistent and that updated fleet data should be incorporated into the EIS before final conclusions are drawn.

This technical appendix, prepared by Jeffery Bogen of DAAC in May 2026, analyzes runway and airspace capacity at Seattle-Tacoma International Airport (SEA) to support the Port of Seattle's Sustainable Airport Master Plan (SAMP) environmental review process. It compares FAA 2016 baseline hourly flow rates against observed 2024–2026 performance data, documents current capacity improvements, and projects annual flight operations through 2037 under both constrained and unconstrained growth scenarios. The document is intended as supporting reference material for public comments on seating capacity impacts under SEPA/EIS review.

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.

This document is the agenda for the Port of Seattle Regular Commission Meeting held on May 26, 2026, covering routine administrative and business items such as approval of meeting minutes, claims, and several construction and technology contracts. Key action items include authorizations related to the S Concourse Evolution project at Seattle-Tacoma International Airport, a shore power project at Pier 66, and an emergency power scope of work for the Main Terminal Improvement Program. The agenda does not contain any items specifically addressing airport noise policy.