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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.

TagSustainable Airport Master Plan(237)

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  • 2017-10-01

    Technical Memorandum No. 6: Alternatives — Seattle-Tacoma International Airport

    This 2017 technical memorandum, prepared by Leigh Fisher for the Port of Seattle, outlines development alternatives for Seattle-Tacoma International Airport as part of a Sustainable Airport Master Plan. It covers proposed changes to the airfield, passenger terminals, ground access, parking, air cargo facilities, and general aviation. The document evaluates options such as runway relocations, new taxiway configurations, and terminal expansions to address capacity, safety compliance, and long-term growth needs.
    TagsPort Of Seattle, Runways, SAMP, Sea-Tac Airport, SEPA, Sustainable Airport Master PlanFolderTechnical Memos
  • 2017-09-01

    Air Quality Baseline (2016) Condition Report: SAMP Environmental Review, Seattle-Tacoma International Airport

    This report, prepared by Landrum & Brown for the Port of Seattle, documents baseline air quality conditions at Seattle-Tacoma International Airport as of 2016, as part of the Sustainable Airport Master Plan (SAMP) Environmental Review. It inventories emission sources across the airport—including aircraft operations, ground support equipment, and stationary sources like boilers and generators—and compares 2016 emission levels to those from 2014. The findings are intended to support future environmental planning and assessment of proposed airport development.
    TagsAEDT, Landrum & Brown, SAMP, Sea-Tac Airport, Sustainable Airport Master PlanFolderSAMP
  • 2017-07-25

    SAMP Update Washington State Transportation Commission July 25, 2017

    A presentation to the Washington State Transportation Commission updating on Sea-Tac Airport’s current status, including passenger and flight operation growth, current major projects, and the Sustainable Airport Master Plan for future demand.
    TagsLTP, SAMP, SASA, Sustainable Airport Master Plan, Washington State Transportation CommissionFolderSAMP
  • 2017-06-21

    DNS for Concourse D Hardstand Holdroom comment letter

    In a June 21, 2017 letter to the Port of Seattle, the City of Des Moines raised concerns about the SEPA Determination of Nonsignificance for the Concourse D Hardstand Holdroom project at Sea-Tac Airport, questioning whether the facility was truly limited to serving existing passenger levels or was also intended to support future growth. The city argued that the DNS should clarify how the project relates to the Sustainable Airport Master Plan and future expansion. Des Moines emphasized that its residents already bear disproportionate noise and health impacts from airport operations and requested thorough environmental analysis and appropriate mitigation for any airport facility enhancements.
    TagsCity Of Des Moines, Concourse D, Sea-Tac Airport, SEPA, Sustainable Airport Master PlanFolderSP #2
  • 2017-06-01

    Technical Memorandum No. 5: Facility Requirements — Seattle-Tacoma International Airport

    This 2017 technical memorandum, prepared by Leigh Fisher for the Port of Seattle, outlines facility requirements for Seattle-Tacoma International Airport as part of the Sustainable Airport Master Plan. It covers planned needs across airfield operations, passenger terminals, ground access and parking, air cargo, and general aviation based on projected activity levels. The document provides detailed assessments of existing infrastructure and identifies future capacity and design requirements to accommodate long-term growth at Sea-Tac.
    TagsPort Of Seattle, SAMP, Sea-Tac Airport, SEPA, Sustainable Airport Master Plan, TerminalFolderTechnical Memos
  • 2017-02-03

    Sea-Tac Airport breaks ground on multi-million dollar expansion

    North Terminal will gain 201,000 sq. ft.; Dining and shopping areas will expand 02/03/2017 Officials from the Port of Seattle and Sea-Tac Airport broke ground on Feb. 3 on a multi-million dollar project that will expand and update much of the facility’s aging North Satellite plus double the dining and shopping areas. More than 201,000
    CategoriesFrom The Web TagsHighline Times, North Satellite, SAMP, Sea-Tac Airport, Sustainable Airport Master Plan
  • 2017-01-30

    Sea-Tac Airport Sustainable Airport Master Plan Update

    The Port of Seattle’s Sustainable Airport Master Plan (SAMP) is wading through a process to plan for airport growth for passenger and cargo service at Seattle-Tacoma International Airport over the next 20 years. The plan looks at what types of actions should be taken to accommodate and mitigate growth of airport operations. The Port of
    CategoriesFrom The Web TagsSAMP, Sustainable Airport Master Plan, The Urbanist
  • 2016-12-02

    Tomorrow @Sea-Tac Coalition advertising supplement

    This December 2016 advertising supplement from the Tomorrow@Sea-Tac Coalition outlines the Port of Seattle's plans to expand and modernize Seattle-Tacoma International Airport, which was the fastest-growing major hub in the country and expected to reach 66 million passengers by 2034. The document highlights billions of dollars in planned capital improvements under a Sustainable Airport Master Plan, covering aircraft operations, passenger facilities, and cargo services, while emphasizing commitments to environmental sustainability. It also spotlights workforce development efforts, noting that Sea-Tac directly and indirectly supports nearly 172,000 regional jobs and actively works to create opportunities for diverse and minority-owned businesses in surrounding South King County communities.
    TagsPort Of Seattle, Puget Sound Business Journal, SAMP, Sea-Tac Airport, Sustainable Airport Master PlanFolderSea-Tac Airport
  • 2016-11-07

    Aviation Capacity and Air Freight Meeting Notes: November 7, 2016

    Meeting notes from a November 7, 2016 aviation capacity and air freight session held at SeaTac International Airport, covering topics such as top cargo commodities, airport capacity constraints, and cargo data tracking challenges. Speakers including port commissioners, WSDOT representatives, and airport managers discussed Sea-Tac's approaching operational capacity, the heavy reliance on passenger belly cargo, and the potential for other Washington airports like Spokane and Moses Lake to absorb freight demand. The group explored possible next steps including an air freight study, shipper outreach, and intermodal coordination strategies.
    CategoriesMeetings TagsCapacity, Cargo, SAMP, Sea-Tac Airport, Sustainable Airport Master Plan, Washington State Legislature, WSDOTFolderSAMP
  • Seattle-Tacoma Airport Master Plan Development

    Seattle-Tacoma (Sea-Tac) International Airport, one of the fastest growing and busiest airports in the US, served more than 42 million passengers and 332,000 metric ton (mt) of air cargo in 2015. Project Type Airport master plan Location Seattle-Tacoma International Airport, Washington, US Estimated Investment $1.645bn Start of Construction Q1 2017 Expected Completion 2021 Seattle-Tacoma (Sea-Tac)
    CategoriesFrom The Web TagsAirport Technology, SAMP, Sustainable Airport Master Plan

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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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