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STNI

STNISea-Tac Noise.Info

  • Solve for Sea-Tac. Solve for every airport.
  • Since 2016, working to obtain justice for everyone living under the flight path.
  • Less Noise. Cleaner Air. Better Public Health. Compensation.
  • Everything you think you know about the airport is wrong.

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  • 2018-09-28

    Sustainable Airport Master Plan near term projects NEPA EA and SEPA EIS scoping comments

    In September 2018, the cities of SeaTac, Burien, Normandy Park, and Des Moines submitted joint scoping comments urging the Port of Seattle to broaden its environmental review of the Sustainable Airport Master Plan (SAMP) beyond just near-term construction projects. The cities argued that cumulative impacts — including a projected 60% increase in aircraft operations and 75% rise in passengers by 2034 — require a full analysis of noise, air quality, and traffic effects on nearby communities. They also called for a baseline period starting in 2012, rather than 2018, to capture the significant growth and airspace changes that have already occurred without adequate environmental review.
    CategoriesCorrespondence TagsEnvironmental Impact Statement, NEPA, SAMP, Scoping documents, SEPAFolderSeaTac
  • 2018-09-28

    City of SeaTac scoping comments on Sustainable Airport Master Plan near term projects NEPA EA and SEPA EIS

    The City of SeaTac submitted formal scoping comments to the Port of Seattle in September 2018, raising concerns that the environmental review for the Sustainable Airport Master Plan (SAMP) was too narrowly focused on 'near term projects' and should be expanded to cover the airport's full long-term growth vision. The city also reminded the Port of binding commitments made in a 2018 Interlocal Agreement and a 2015 Letter of Understanding, including promises to assess transportation impacts, protect nearby wetlands, and mitigate effects on city streets from increased cargo truck and passenger traffic. Key issues flagged include the impact of new cargo facilities, a proposed employee parking lot near wetlands, and the need to account for public transit use by airport workers and travelers.
    CategoriesCorrespondence TagsCity Of SeaTac, Environmental Impact Statement, NEPA, SAMP, SEPAFolderSeaTac
  • 2018-09-28

    Joint Scoping Comments on Sustainable Airport Master Plan Near-Term Projects NEPA EA and SEPA EIS from Cities of Burien, Des Moines, Normandy Park, and Sea-Tac

    In September 2018, the cities of SeaTac, Burien, Normandy Park, and Des Moines jointly wrote to the Port of Seattle urging a broader environmental review of the Sustainable Airport Master Plan (SAMP) for Seattle-Tacoma International Airport. The cities expressed concern that limiting the review to only near-term construction projects would ignore the cumulative noise, air quality, and traffic impacts already burdening their communities. They called on the Port to assess impacts from 2012 onward, include the full long-term SAMP in the environmental analysis, and consider alternative airport sites as part of the review.
    TagsCity of Burien, City Of SeaTac, NEPA, SAMP, SEPAFolderPDR26-042 Burien
  • 2018-08-13

    Aviation Advisory Committee Meeting Minutes — August 13, 2018

    The Des Moines Aviation Advisory Committee met on August 13, 2018 to discuss the Port of Seattle's Sustainable Airport Master Plan (SAMP) environmental scoping process, including a public scoping meeting scheduled for September 10, 2018 at Highline College. Committee members, city officials, and residents raised concerns about airport noise, air and water pollution, and the scope of the environmental review, which will cover both state (SEPA) and federal (NEPA) requirements. The committee encouraged broad community participation in the upcoming scoping meeting and discussed ensuring that airport expansion since 2012 be included in the review.
    TagsDes Moines Aviation Advisory Committee, NEPA, Quiet Skies Coalition, SAMP, SEPAFolderAd Hoc Aviation Advisory Committee
  • 2018-07-30

    Agency Scoping Meeting: Agency Invitation Letter — SEPA Determination of Significance and Request for Comments on SEPA EIS and NEPA EA, Sea-Tac Airport Sustainable Airport Master Plan (SAMP)

    The Port of Seattle is conducting an environmental review of near-term construction projects at Seattle-Tacoma International Airport (Sea-Tac) planned through 2027, as part of the Sustainable Airport Master Plan (SAMP). Key planned improvements include a second terminal, a centralized maintenance campus, off-airport cargo facilities, and roadway and fueling expansions to accommodate up to 477,000 annual flights and 56 million passengers. A full Environmental Impact Statement (EIS) under Washington State's SEPA, as well as a federal Environmental Assessment under NEPA led by the FAA, are being prepared to evaluate potential environmental impacts.
    TagsEnvironmental Impact Statement, NEPA, Port Of Seattle, SAMP, SEPAFolder2018 Scoping
  • 2018-05-01

    Technical Memorandum No. 7: Facilities Implementation and Financial Feasibility — Seattle-Tacoma International Airport

    This 2018 technical memorandum, prepared by Leigh Fisher for the Port of Seattle, outlines near-term construction projects, financial feasibility, and long-term vision for Seattle-Tacoma International Airport as part of its Sustainable Airport Master Plan. It covers major airside, terminal, cargo, and landside projects, along with an assessment of airfield operational feasibility and recommended actions following the plan's completion. While focused primarily on facilities and finance, the document provides context for infrastructure decisions that may affect airport operations and surrounding communities.
    TagsCargo, Port Of Seattle, SAMP, Sea-Tac Airport, SEPA, Sustainable Airport Master PlanFolderTechnical Memos
  • 2018-05-01

    Technical Memorandum No. 9: Sustainability Planning and Management Strategy — Seattle-Tacoma International Airport

    This 2018 technical memorandum outlines a Sustainability Planning and Management Strategy for Seattle-Tacoma International Airport, developed by Leigh Fisher and Synergy Consultants for the Port of Seattle. It establishes sustainability goals, objectives, and metrics across financial, environmental, and social focus areas, drawing on FAA guidance and Port of Seattle commitments. The document also addresses climate change risks to airport facilities and provides a framework for integrating sustainability into near-term airport development decisions.
    TagsFAA, Port Of Seattle, SAMP, Sea-Tac Airport, SEPA, Sustainable Airport Master PlanFolderTechnical Memos
  • 2018-05-01

    Technical Memorandum No. 8: Environmental Overview, Seattle-Tacoma International Airport

    This 2018 technical memorandum prepared by Leigh Fisher for the Port of Seattle provides an environmental overview of Seattle-Tacoma International Airport as part of its Sustainable Airport Master Plan. It examines existing environmental conditions across topics such as air quality, noise, water resources, biological resources, and hazardous materials, then assesses how the airport's near-term construction and improvement projects could affect those resources. The document is intended to guide planners in understanding potential environmental impacts — including noise and compatible land use — before major airport development decisions are finalized.
    TagsEnvironmental Impact Statement, Port Of Seattle, SAMP, Sea-Tac Airport, SEPA, Sustainable Airport Master PlanFolderTechnical Memos
  • 2018-03-19

    City of Des Moines comment letter on Vision 2050 scoping

    In a March 2018 letter to the Puget Sound Regional Council, the City of Des Moines, Washington, expressed concerns about the disproportionate noise, air quality, and health impacts that SeaTac Airport's rapid growth places on nearby residents. The city urged that Vision 2050's environmental review include a serious evaluation of siting a second major commercial airport in western Washington to relieve capacity pressure on SeaTac. It also called for multi-modal transportation solutions and thorough analysis of jet fuel emissions and other environmental impacts as part of regional aviation planning.
    CategoriesCorrespondence TagsSEPAFolderDes Moines
  • 2018-03-06

    Interlocal Agreement Between the Cities of Burien, Des Moines, Normandy Park and Sea-Tac for Environmental Review of the Sea-Tac Airport Sustainable Airport Master Plan

    Four cities near Sea-Tac Airport — Burien, Des Moines, Normandy Park, and SeaTac — entered into a formal interlocal agreement in 2018 to coordinate their review of the Port of Seattle's Sustainable Airport Master Plan (SAMP), a 20-year airport growth proposal with potential significant noise and environmental impacts on surrounding communities. The agreement establishes a shared process for hiring consultants, pooling funding, and submitting unified comment letters during the NEPA and SEPA environmental review processes. It covers the period from March 2018 through December 2020 and is governed by Washington State's Interlocal Cooperation Act (RCW 39.34).
    TagsEnvironmental Impact Statement, Interlocal Agreement, NEPA, SAMP, SEPAFolderFour City ILA

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Upcoming Events

  • Stay Grounded Event: Night trains, not night planes!
    Add to CalendarMSunday Sep 13: 12:00am
    Ntnnp social media3

    For the past two years, more than 220 initiatives from 15 countries have declared September 13th as the International day for the ban of night flights at airports. In parallel, activists across Europe have been gathering for pyjama parties for night trains – coordinated in 2024 and 2025 by Back on Track and Stay Grounded.

    [...]
  • Burien Airport Committee Meeting September 15, 2026
    Add to CalendarMTuesday Sep 15: 6:00pm
    400 SW 152nd St, Burien, WA 98166
    Burien airport committee 15 sep 2026 agenda pdf pdf

    a) Part 150 Noise Study (Emily Inlow-Hood) — 15 minutes
    b) SAMP Update and Next Steps (Brian Davis and Sarah Moore) — 15 minutes
    c) Legislative Updates — 10 minutes
       • SCA (Sarah Moore)
       • Work with Sen. Orwall (Brian Davis)
    d) StART Reorganization (Jeff Harbaugh and Karen Veloria) — 10 minutes

    [...]

[See all...]


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Issues

Sea-Tac Airport is currently undergoing the largest and longest expansion in its history, collectively known as the Sustainable Airport Master Plan (SAMP). Some of it you can already hear, but you’re probably not aware of what it all means. Here’s what you need to know.
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Read This!

As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.
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