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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.

TagAirport Expansion(165)

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  • Sea-Tac Airport International Arrivals Facility Aerial Planning Rendering

    An aerial architectural rendering or composite photograph showing a large international airport with multiple terminals, gates, runways, and what appears to be a new terminal connector or people-mover structure highlighted in lighter tones against a desaturated background. The image style suggests it is a planning or proposal visualization, possibly for a terminal expansion project.
    TagsAirport Expansion, International Arrivals Facility, Sea-Tac Airport, TerminalFolderTerminal
  • 2024-12-21

    Construction Site with Steel Beam Installation

    A crane lifts the final steel beam during a topping-out ceremony, decorated with an evergreen tree and an American flag — a traditional construction milestone. A large crowd of workers in high-visibility vests and hard hats gather to observe the event at an active multi-story construction site.
    TagsAirport Expansion, ConstructionFolderTerminal
  • 2024-10-22

    Sea-Tac Airport Capital Spending Projections 2025–2029 — Slide 20 (Draft Plan of Finance, October 2024)

    A bar chart from a Sea-Tac Airport presentation (slide 18) projects $4.9 billion in airport capital spending from 2025 through 2029, broken down annually into Mega Projects and Other Projects. Annual totals range from $863.8M (2029) to $1,138.5M (2026), with a reference line marking the 20-year historical maximum of $579.1M.
    TagsAirport Expansion, Property Tax Levy, Sea-Tac Airport, Tax LevyFolderTax Levy 2025
  • 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
  • 2024-06-25

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

    An aerial rendering depicting the SR 509 Expressway extension (Stage 1b) in SeaTac, Washington, showing planned infrastructure including a new 24th Avenue South interchange, new 34th Avenue S connection to I-5, a reconfigured S 208th Street, a toll point on SR 509, and proximity to the Sound Transit Angle Lake Station. The project corridor runs east-west connecting I-5 to existing SR 509 near Angle Lake.
    CategoriesResources TagsAirport Expansion, Airport Layout Plans, seatac, Sound TransitFolderSR-509
  • 2023-08-27

    CASE officers and contacts list

    This document appears to be an organizational roster for CASE (Citizens Against Sea-Tac Expansion), listing officer positions and contact information including a Chair (acting), Vice Chair, Treasurer, Secretary, and members of Technical and Research Committees focused on noise and environmental health concerns. The document references a goal of addressing airport expansion alternatives and includes phone numbers for key members such as Loretta Bower (Treasurer) and Joan Bell (Secretary). It likely dates from the early period of community organizing around Sea-Tac Airport expansion opposition.
    CategoriesCorrespondence TagsAirport Expansion, CASE, Citizens Against Sea-Tac Expansion, Handwritten Notes, RCAA, Sea-Tac AirportFolderRCAA
  • 2023-08-27

    RCAA information on air capacity issues

    A letter from the Regional Commission on Airport Affairs (RCAA) to Senator Skratek urges review of air capacity issues related to Sea-Tac Airport expansion, noting that the expansion could negatively affect many people. The letter encloses a book suggested by Jeff Newell containing executive summaries and charts covering air capacity issues, and requests 30 minutes of the Senator's time before the final Transportation Policy Board vote on March 4. The letter is endorsed by a wide range of community organizations, cities, and advocacy groups opposed to or concerned about Sea-Tac expansion.
    CategoriesCorrespondence TagsAirport Expansion, Capacity, RCAA, Sea-Tac AirportFolderRCAA
  • 2023-08-22

    Airport construction slowed by ecology laws, says E.P.A. official

    An EPA official warned that environmental and ecology laws have slowed the construction and expansion of new airports across the United States. Stanley M. Greenfield, assistant administrator of the Environmental Protection Agency, stated that airports generate significant noise, air, and water pollution, and that surrounding industrial and residential growth creates a 'vicious cycle' of expensive, hard-to-solve problems. He called for a comprehensive national program for aircraft noise abatement, noting that complete technological control of aircraft noise at the source was not yet available.
    TagsAirport Expansion, Environmental Protection Agency, EPA, Noise PollutionFolderNewspapers
  • 2023-07-18

    Paine Field Aerial View

    Aerial photograph looking north showing Paine Field (KAWO/PAE) with runway 34 threshold markings visible in the foreground, and the Boeing Everett production facility — the world's largest building by volume — visible in the background with characteristic blue-roofed structures. Puget Sound and the city of Everett are visible in the upper background. This facility is distinct from Sea-Tac Airport.
    Tagsaircraft, Airport Expansion, RunwaysFolderPaine Field

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Upcoming Events

  • 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

    [...]

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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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