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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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  • 2024-06-25

    SR 509, I-5 to 24th Avenue S. (Stage 1b)

    Aerial rendering showing the planned SR 509 Expressway extension (Stage 1b) connecting I-5 to 24th Avenue S. in the SeaTac/Kent area of Washington State. The image labels key project elements including the new SR 509 Expressway alignment, a toll point near S. 208th St, southbound and northbound SR 509 ramps, a southbound I-5 off-ramp, 24th Ave S. interchange ramps, a future light rail corridor, and the S. 216th St overpass.
    CategoriesResources TagsAirport Development Fund, Airport Expansion, Port Of SeattleFolderSR-509
  • 2024-06-25

    SR 509, I-5 to 24th Avenue S. (Stage 1b)

    A planning rendering for SR 509, Stage 1b, showing proposed highway improvements between I-5 and 24th Avenue S. in the Kent/Des Moines area. Labeled features include new northbound and southbound I-5/SR 509 ramp connections, a new Veterans Drive I-5 undercrossing and SR 516 interchange improvements, wider sidewalks and shared use paths, and the future SoundTransit Kent/Des Moines Station along SR 99.
    TagsAirport Development Fund, Airport Expansion, Port Of SeattleFolderSR-509
  • 2024-06-21

    Port Of Seattle Letter to Secretary Buttigieg Supporting Delta Air Lines SEA-DCA Flight Application

    In a June 2024 letter to U.S. Transportation Secretary Pete Buttigieg, Port of Seattle leaders expressed strong support for Delta Air Lines' application to add a new daily nonstop flight between Seattle-Tacoma International Airport (SEA) and Ronald Reagan Washington National Airport (DCA). The letter highlights that only two direct flights per day currently serve the SEA-DCA route, leaving most Pacific Northwest travelers bound for the Washington, D.C. area to use connecting flights or more distant airports. Port officials argue that adding the new route would increase competition, lower fares, and improve access to the nation's capital for residents throughout the Pacific Northwest.
    TagsDelta, DOT, FAA Reauthorization, Port Of Seattle, Reagan National Airport, SlotsFolderReagan D.C.
  • 2024-06-20

    Notice of public hearing: Port Of Seattle bond and note issuance

    The Port of Seattle held a public hearing on June 20, 2024, to consider issuing up to $400 million in commercial paper notes and up to $850 million in revenue bonds to fund improvements across its maritime and aviation facilities. A significant portion—up to $600 million—is earmarked for Seattle-Tacoma International Airport projects, including runway repairs, terminal construction, noise mitigation, and related airfield upgrades. The notice also covers funding for seaport terminals, marinas, and Port technology infrastructure throughout the Seattle area.
    TagsNorthwest Seaport Alliance, Port Of Seattle, public hearing, Sea-Tac AirportFolderFinance
  • 2024-06-12

    Sea-Tac Airport PFAS SHARP report — part 1 of 2

    A SHARP (Site Hazard Assessment Ranking and Prioritization) report for SeaTac Airport covering PFAS contamination identified at four areas: fire station, fuel farm, fire training area, and industrial wastewater system. The report details media scores for groundwater, soil, surface water, sediment, and indoor air, noting concerns about Des Moines Creek and the City of Highline’s
    TagsDes Moines Creek, Ecology, PFAS, Port Of Seattle, Sea-Tac AirportFolderWater
  • 2024-06-05

    Appendix F Public Outreach

    The Port of Seattle held public workshops in June 2024 to kick off an update to the Seattle-Tacoma International Airport Part 150 Noise Study, gathering community input from residents and other interested parties near the airport. The workshops were promoted through a wide range of online publications, social media, and community outreach channels, with materials available in multiple languages including Spanish, Somali, Vietnamese, and Chinese. A follow-up workshop on Draft Noise Exposure Maps was scheduled for September–October 2025.
    Tagscommunity engagement, Outreach, Part 150, Port Of Seattle, Sea-Tac AirportFolderNEM
  • Appendix f public outreach ada final pdf
    2024-06-05

    Appendix F Public Outreach

    The Port of Seattle held public workshops in June 2024 to kick off an update to the Seattle-Tacoma International Airport Part 150 Noise Study, gathering community input from residents and other interested parties near the airport. The workshops were promoted through a wide range of online publications, social media, and community outreach channels, with materials available in multiple languages including Spanish, Somali, Vietnamese, and Chinese. A follow-up workshop on Draft Noise Exposure Maps was scheduled for September–October 2025.
    Tagscommunity engagement, Outreach, Part 150, Port Of Seattle, Sea-Tac AirportFolderNEM
  • 2024-06-01

    Purpose and Need Technical Report: Sustainable Airport Master Plan – Near-Term Projects

    This technical report, prepared by Landrum & Brown for the Port of Seattle in June 2024, outlines the purpose and need for near-term construction and improvement projects identified in Sea-Tac Airport's Sustainable Airport Master Plan. It is part of a broader set of supporting documents that also covers alternatives analysis, terminal needs assessment, and air cargo facility requirements. The report provides the foundational justification for proposed airport development decisions and infrastructure changes.
    TagsEnvironmental Impact Statement, Landrum & Brown, NEPA, Port Of Seattle, SAMP, Sea-Tac Airport, Sustainable Airport Master PlanFolderAppendices
  • 2024-06-01

    Purpose and Need Technical Report: Sustainable Airport Master Plan – Near-Term Projects

    This technical report, prepared by Landrum & Brown for the Port of Seattle in June 2024, outlines the purpose and need for near-term capital projects identified in Sea-Tac Airport's Sustainable Airport Master Plan. It is part of a broader set of supporting documents that also covers alternatives analysis, terminal needs assessment, and air cargo facility requirements. The report provides the foundational justification for proposed airport improvements and infrastructure expansions at Seattle-Tacoma International Airport.
    TagsEnvironmental Impact Statement, Landrum & Brown, NEPA, Port Of Seattle, SAMP, Sea-Tac Airport, Sustainable Airport Master PlanFolderAppendices
  • 2024-06-01

    Appendix B: SAMP – Near-Term Projects: Purpose and Need Technical Report

    This technical report, prepared by Landrum & Brown for the Port of Seattle in June 2024, outlines the purpose and need for near-term construction and improvement projects identified in the Sustainable Airport Master Plan for Seattle-Tacoma International Airport. It is part of a broader set of supporting documents that also covers alternatives analysis, terminal needs, and air cargo facility requirements. The report provides the foundational justification for planned airport development decisions.
    TagsEnvironmental Impact Statement, Landrum & Brown, Port Of Seattle, SAMP, Sea-Tac Airport, SEPA, Sustainable Airport Master PlanFolderAppendices

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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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