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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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  • 2024-12-11

    City of Burien Comment Letter on SAMP Draft Environmental Assessment

    The City of Burien submitted formal comments in December 2024 arguing that the Port of Seattle's Sustainable Airport Master Plan (SAMP) for Sea-Tac International Airport contains serious flaws, including an unrealistically narrow study boundary that ignores noise and air pollution impacts on surrounding neighborhoods. The city contends that the plan fails to account for cumulative impacts such as the SR-509 highway extension, the 2008 opening of the airport's third runway, and emerging science on health risks from ultrafine particles and aircraft noise. Burien is calling for a full Environmental Impact Statement rather than the less rigorous Environmental Assessment currently underway.
    TagsCity of Burien, Environmental Impact Statement, NEPA, SAMP, SR509, Sustainable Airport Master PlanFolder2024 Comment
  • 2024-12-10

    SEA Sustainable Airport Master Plan (SAMP): Environmental review

    The FAA released a draft Environmental Assessment in October 2024 for Seattle-Tacoma International Airport's Sustainable Airport Master Plan (SAMP), which outlines 31 near-term projects to expand airport capacity for growing passenger demand. Key projects include a new passenger terminal and gates, taxiway extensions, cargo facility changes, and employee parking updates. The cities of SeaTac, Burien, Des Moines, and Normandy Park are collaborating to submit technical comments on the plan before the December 13, 2024 deadline.
    TagsCity Of SeaTac, Environmental Review, NEPA, SAMP, SEPAFolderSeaTac
  • 2024-12-06

    Port Of Seattle SAMP presentation Wesley

    A presenter speaks at a podium at Wesley Des Moines church, displaying a PowerPoint slide titled 'Environmental Review – Timeline' covering NEPA/SEPA review milestones from Fall 2018 Scoping through Late 2025 SEPA Final Document and Decision, consistent with Sea-Tac Airport SAMP (Sustainable Airport Master Plan) environmental review proceedings. The timeline references Fall 2024 NEPA steps including a 45-day public comment period and Spring/Summer 2025 SEPA agency and public comment periods.
    TagsDes Moines, NEPA, SAMP, Sea-Tac Airport, SEPAFolderDes Moines
  • 2024-12-02

    EPA Region 10 Letter to Port Of Seattle: Review of FAA Draft Environmental Assessment for Sea-Tac Airport SAMP Near Term Projects

    The U.S. EPA reviewed the Federal Aviation Administration's draft environmental assessment for Sea-Tac Airport's near-term expansion projects, which include a new second terminal, cargo facilities, and other infrastructure planned through 2032. The EPA raised concerns about disproportionate health and environmental impacts on surrounding communities, noting that air quality indicators such as diesel particulate matter and nitrogen dioxide already exceed the 80th state percentile in the project area. The agency recommends that the final assessment more thoroughly address environmental justice, air quality, climate change, and wetlands impacts on these overburdened neighborhoods.
    TagsEJScreen, Environmental Justice, EPA, NEPA, SAMP, Sustainable Airport Master PlanFolder2024 Comment
  • 2024-11-27

    CEQ’s Wings Clipped: D.C. Circuit Invalidates CEQ’s Binding Regulations

    In a significant ruling, the D.C. Circuit in Marin Audubon Society v. Federal Aviation Administration held that the Council on Environmental Quality (CEQ) lacks the statutory authority to issue binding regulations under the National Environmental Policy Act (NEPA).1 The decision calls into question the legal basis for key aspects of NEPA compliance, including the use
    CategoriesFrom The Web, Litigation TagsMarin Audubon Society v FAA, NEPA, Snell & Wilmer
  • 2024-11-12

    Marin Audubon Society v. Federal Aviation Administration: D.C. Circuit Court of Appeals Opinion No. 23-1067

    A federal appeals court reviewed a challenge by conservation groups to an Air Tour Management Plan regulating tourist flights over four national parks near San Francisco, including Golden Gate National Recreation Area and Point Reyes National Seashore. The Federal Aviation Administration and National Park Service had jointly issued the plan under the National Parks Air Tour Management Act of 2000, determining that no full environmental review was required because the plan would cause minimal additional environmental impact. The court considered whether the agencies properly bypassed environmental analysis under the National Environmental Policy Act.
    CategoriesLitigation TagsEnvironmental Impact Statement, FAA, Marin Audubon Society v. Federal Aviation Administration, NEPAFolderLaw
  • DNL65-overlay-APE

    A Google Earth satellite image showing the Seattle-Tacoma (Sea-Tac) Airport area with a red shaded elliptical overlay indicating a noise exposure or flight corridor zone, an orange highlighted road/highway network, and a blue polygon outlining the airport property boundary. Visible route markers include SR-509, SR-516, SR-518, US-99, and I-5.
    TagsNEPA, SAMP, Sustainable Airport Master PlanFolder2024 Draft EA
  • fix the harm graphic 169d79_6e066edc98434fc2a950bc69be687193~mv2

    TagsNEPA, SAMP, Sustainable Airport Master PlanFolder2024 Draft EA
  • Table 4-2: Summary of Potential Environmental Impacts – Socioeconomic, Environmental Justice, and Children’s Health

    This table excerpt from an environmental review document compares three alternatives (No Action, Proposed Action, and Hybrid Terminal Option) for impacts on socioeconomic conditions, environmental justice populations, and children's health and safety risks at Seattle-Tacoma International Airport (SEA). Under the Proposed Action, two businesses (Doug Fox Lot and PACCAR Aviation) and one intersection (24th Avenue South from S. 150th Street) would be closed, with no significant or disproportionate adverse impacts found after mitigation.
    TagsNEPA, SAMP, Sustainable Airport Master PlanFolder2024 Draft EA
  • Chapter 3 Affected Environment_99

    Exhibit 3-23 from the Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects, prepared by Landrum & Brown, dated October 2024 (Draft). The map displays watershed basins (green lines), water features (light blue), and the General Study Area boundary (blue dashed line) surrounding Sea-Tac Airport, including nearby features such as Angle Lake and Puget Sound.
    TagsNEPAFolderChapter-3 (Affected Environment)

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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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