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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.

TagSea-Tac Airport(1835)

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  • 2026-05-01

    SAMP Near-Term Projects Draft EIS Chapter 5: Cumulative Impacts

    This section of the May 2026 Draft Environmental Impact Statement for Seattle-Tacoma International Airport examines how the airport's near-term construction projects may combine with other past, present, and planned developments to create cumulative environmental effects. The analysis covers 58 projects in the surrounding area—including housing, road improvements, and airport expansions—completed or expected between 2017 and 2032, within a study area defined by the airport grounds, the 65 DNL noise contour, and the surface transportation zone. Long-term airport expansion proposals beyond 2032 are excluded from the analysis because they lack sufficient detail and funding approval to allow meaningful review.
    TagsEnvironmental Impact Statement, Port Of Seattle, SAMP, Sea-Tac Airport, SEPAFolderDraft EIS
  • 2026-05-01

    Draft EIS Chapter 6: References — Seattle-Tacoma International Airport SAMP Near-Term Projects

    This document is the References section of the Draft Environmental Impact Statement (EIS) for Seattle-Tacoma International Airport's Sustainable Airport Master Plan Near-Term Projects, published in May 2026 under Washington State's Environmental Policy Act (SEPA). It lists the sources cited across the EIS's chapters, covering topics such as aviation activity forecasts, terminal facility requirements, air quality standards, greenhouse gas emissions, geological surveys, and federal FAA design guidelines. The references draw from federal agencies (FAA, EPA), state bodies (WSDE, WDNR, WDFW), regional organizations (Puget Sound Regional Council), and consulting firms that informed the airport's environmental review and planning process.
    TagsEnvironmental Impact Statement, Port Of Seattle, SAMP, Sea-Tac Airport, SEPAFolderDraft EIS
  • Sustainable airport master plan near term projects state environmental policy act draft environmental impact statement and next steps page 3

    SAMP Near-Term Projects Aerial Map — SEPA Draft EIS

    A slide titled 'SAMP Near-Term Projects' presents an aerial map of Seattle-Tacoma International Airport identifying planned near-term capital improvements including a Second Terminal, North Gates, Taxiway A/B and D Extensions, Runway Blast Pads, Hardstand areas (Central and North), Busway and Stations, Roadway Improvements, Fuel Farm Expansion, ARFF Relocation, Westside Maintenance Campus, C4S Warehouse Redevelopment, Off-site Cargo, and a Centralized Receiving and Distribution Facility. The slide is numbered page 3 and uses a color-coded legend distinguishing new terminal, maintenance, cargo, support facilities, hardstand pads, existing buildings, new pavement, and demolition areas.
    TagsEIS, Environmental Impact Statement, Port Of Seattle, SAMP, Sea-Tac Airport, SEPA, StART, Sustainable Airport Master PlanFolderStART
  • Start Meetingagenda 2026429 Pdf 1
    2026-04-29

    StART Meeting Agenda — April 29, 2026

    The StART (SEA Stakeholder Advisory Round Table) meeting scheduled for April 29, 2026 focuses on updates to the Sustainable Airport Master Plan (SAMP) Near-Term Projects and their environmental review process, including an explanation of how the state-level SEPA Environmental Impact Statement differs from the federal NEPA Environmental Assessment. The agenda includes a presentation by Port of Seattle staff, a community roundtable update, and an open public comment period. StART serves as a forum for cooperation between the Port of Seattle and communities neighboring Seattle-Tacoma International Airport.
    CategoriesMeetings TagsNEPA, Port Of Seattle, SAMP, Sea-Tac Airport, SEPA, StARTFolderStART
  • 2026-04-24

    Request for updated information to complete hazard assessments of contaminated sites located at SeaTac Airport

    The Washington State Department of Ecology sent a letter to Megan King at Port of Seattle requesting updated information about contaminated sites at SeaTac Airport by August 31, 2026. The letter explains the Site Hazard Assessment and Ranking Process (SHARP) used to evaluate contamination in soil, groundwater, surface water, sediment, and indoor air. Six specific
    CategoriesCorrespondence TagsEcology, MTCA, Port Of Seattle, Sea-Tac AirportFolderEcology
  • UpgradeSEA map Upgrademain
    2026-04-23

    Upgrade SEA Airport Improvement Map

    An aerial overview of Seattle-Tacoma International Airport annotated with labeled capital improvement projects under the 'Upgrade SEA' program, including C Concourse Expansion, S Concourse Evolution, Concourse A Building Expansion for Lounges, SEA Gateway, Main Terminal Improvements Program, Baggage Optimization, Checkpoint 1 Relocation, Automated Parking Guidance System, Restroom Renovation, Roadway Improvements, Curbside Accessibility and Safety, and SEA Underground Controls Replacement. The Upgrade SEA diamond logo is visible in the lower left corner.
    TagsAirport Expansion, capital improvements, Map, Sea-Tac AirportFolderSea-Tac Airport
  • Baggage

    Unclaimed Luggage Lined Up at Airport Baggage Claim

    A large collection of unclaimed or delayed luggage is lined up in rows at an airport baggage claim area. A monitor in the background displays 'Baggage Claim' text, and a baggage carousel is visible with travelers standing nearby.
    TagsAirports, Cargo, Sea-Tac AirportFolderAirlines
  • 04092026 Alaska Bags 142842

    Alaska Airlines Self-Service Bag-Tag Kiosks at Sea-Tac Airport

    Passengers check in at the Alaska Airlines self-service bag-tag kiosks inside a terminal. The Alaska Airlines logo and 'Print bag tags' signage are clearly visible on the kiosks and wall branding.
    TagsAirline Industry, Alaska Air, Sea-Tac Airport, TerminalFolderAirlines
  • Southwest Checked Bags 12640

    Southwest Airlines Self-Service Check-In Kiosks at Sea-Tac Airport

    Travelers use self-service check-in kiosks at a Southwest Airlines terminal, identifiable by the Southwest branding and 'Start Here' signage on the kiosk stations. A woman with a pink backpack and a young child are seen with luggage at one of the kiosks.
    TagsAirline Industry, Sea-Tac Airport, Southwest AirlinesFolderAirlines
  • United Airlines Bag Fees 88592

    United Airlines Boeing 737 (N37267) at Gate A22

    A United Airlines Boeing 737 (registration N37267) is parked at gate A22 of a terminal, with ground crew and equipment visible. The aircraft displays the current United Airlines livery with blue tail logo and bold 'UNITED' fuselage lettering.
    Tagsaircraft, Sea-Tac Airport, United AirlinesFolderAirlines

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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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