TagEnvironmental Impact Statement(140)
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1997-05-07Final supplemental environmental impact statement: Proposed master plan update, Seattle-Tacoma International Airport
★ 32This Final Supplemental Environmental Impact Statement (FSEIS) evaluates proposed updates to the Master Plan for Seattle-Tacoma International Airport, examining the effects of revised aviation demand forecasts on runway capacity, safety improvements, and landside facilities. It analyzes a range of alternatives to address poor-weather airfield performance, runway length needs for Pacific Rim flights, and runway safety area compliance with FAA standards. The document also assesses environmental consequences including noise impacts on surrounding communities, air quality, wetlands, and construction effects. -
1997-02-01Sea-Tac International Airport impact mitigation study: Initial assessment and recommendations
★ 32This February 1997 report, prepared for five cities near Seattle-Tacoma International Airport along with the Highline School District and Highline Community Hospital, assesses the impacts of Sea-Tac Airport on surrounding communities and offers initial mitigation recommendations. Funded by a State of Washington grant, the study was conducted by Hellmuth, Obata + Kassabaum and Raytheon Infrastructure Services to address concerns such as noise and other community impacts. It represents an early collaborative effort by local jurisdictions to seek remedies and protections for residents and institutions affected by airport operations. -
2026-07-31Mitigation bank project sites map
A map showing potential mitigation sites and existing Port of Seattle habitat sites in the greater Seattle area, including Terminal 25, Terminal 117, and the Auburn Site. The map covers cities including Seattle, Burien, Tukwila, SeaTac, Des Moines, Federal Way, Kent, Renton, and Auburn. Sites are categorized by land use type including storage, vacant, and -
2026-07-16Joint letter from Burien, Des Moines, and SeaTac requesting extension of SAMP SEPA DEIS comment period
The city managers of Burien, Des Moines, and SeaTac jointly wrote to Port of Seattle Commissioners requesting an extension of the public comment period for the Sustainable Airport Master Plan’s SEPA Draft Environmental Impact Statement from 60 to at least 120 days. The letter cites three independent grounds: extraordinary technical complexity, enormous document volume, and -
2026-07-16
Joint letter from Burien, Des Moines, and SeaTac requesting extension of SAMP SEPA DEIS comment period
The city managers of Burien, Des Moines, and SeaTac jointly wrote to Port of Seattle Commissioners requesting an extension of the public comment period for the Sustainable Airport Master Plan’s SEPA Draft Environmental Impact Statement from 60 to at least 120 days. The letter cites three independent grounds: extraordinary technical complexity, enormous document volume, and -
2026-07-14Community open house: Burien, Des Moines, and SeaTac demand equity for airport-impacted communities
Presentation boards from a community open house hosted by Burien, Des Moines, and SeaTac focused on equity concerns related to the Sustainable Airport Master Plan (SAMP). The materials highlight deficiencies in the Draft Environmental Impact Statement (DEIS), including inadequate analysis of hazardous materials impacts and land use compatibility. The boards identify specific technical deficiencies such -
2026-07-14
Community open house: Burien, Des Moines, and SeaTac demand equity for airport-impacted communities
Presentation boards from a community open house hosted by Burien, Des Moines, and SeaTac focused on equity concerns related to the Sustainable Airport Master Plan (SAMP). The materials highlight deficiencies in the Draft Environmental Impact Statement (DEIS), including inadequate analysis of hazardous materials impacts and land use compatibility. The boards identify specific technical deficiencies such -
2026-07-14Seattle Tacoma International Airport (SEA) Sustainable Airport Master Plan (SAMP) Draft Environmental Impact Statement (DEIS) community open house
Presentation slides from a community open house held on July 14, 2026, regarding the Seattle-Tacoma International Airport Sustainable Airport Master Plan (SAMP) Draft Environmental Impact Statement (DEIS). The presentation covers the SAMP overview, DEIS highlights, next steps, and the public comment process. The event was co-hosted by the cities of Burien, Des Moines, and SeaTac. -
2026-07-14
Seattle Tacoma International Airport (SEA) Sustainable Airport Master Plan (SAMP) Draft Environmental Impact Statement (DEIS) community open house
Presentation slides from a community open house held on July 14, 2026, regarding the Seattle-Tacoma International Airport Sustainable Airport Master Plan (SAMP) Draft Environmental Impact Statement (DEIS). The presentation covers the SAMP overview, DEIS highlights, next steps, and the public comment process. The event was co-hosted by the cities of Burien, Des Moines, and SeaTac. -
2026-07-09Port of Seattle Commission Special Meeting – SEPA SAMP NTP Draft EIS Public Comment
The Port of Seattle Commission is holding a Special Meeting to gather public input on the Sustainable Airport Master Plan (SAMP) Near-Term Projects Draft Environmental Impact Statement (DEIS) — and your voice matters. This critical environmental review shapes the future of Seattle-Tacoma International Airport and surrounding communities, making public participation essential. Meeting begins at 4:00 p.m. with informational displays and staff available to answer questions, followed by an official public comment period from 4:30–6:00 p.m. where Commissioners will be present to hear testimony directly. Virtual sign-ups are accepted July 6–8, 2026, and written comments can be submitted via email. The meeting is also available to view or listen to online or by phone.