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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.

TagNEPA(390)

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  • 1997-01-01

    Considering Cumulative Effects Under the National Environmental Policy Act

    A handbook published by the Council on Environmental Quality providing guidance on analyzing cumulative effects under NEPA. The document covers scoping, describing affected environments, determining environmental consequences, and addressing cumulative impacts in environmental assessments.
    TagsCEQ, NEPAFolderCEQ
  • 1997-01-01

    Considering Cumulative Effects Under NEPA (Executive Summary)

    A handbook by the Council on Environmental Quality providing framework and methods for analyzing cumulative effects in environmental assessments and impact statements under NEPA. The document outlines principles, steps, and data sources for cumulative effects analysis but does not establish new legal requirements.
    TagsCouncil on Environmental Quality, Environmental Impact Statement, NEPAFolderCEQ
  • 1996-12-01

    EXH AR040251: JARPA Application for Proposed Master Plan Update Improvements at Seattle-Tacoma International Airport

    JARPA (Joint Aquatic Resources Permit Application) and Section 404 application submitted by Port Of Seattle to the U.S. Army Corps of Engineers (Jack Kennedy, Seattle District Office) in December 1996, prepared by Parametrix, Inc. Requests authorization to place fill material into waters of the United States at Sea-Tac Airport associated with the Master Plan Update
    TagsACC, Army Corp of Engineers, Environmental Impact Statement, NEPA, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 17
  • 1996-02-01

    EXH AR038744: Final Environmental Impact Statement for Proposed Master Plan Update Development Actions at Seattle-Tacoma International Airport, Volume 1 of 7

    Final Environmental Impact Statement (EIS) prepared jointly by the Federal Aviation Administration (FAA) Northwest Mountain Region and the Port of Seattle for the Seattle-Tacoma International Airport (Sea-Tac) Master Plan Update, dated February 1996, AR038744. Covers proposed development actions 1996-2020 including a new third parallel runway (Runway 16X/34X) up to 8,500 feet long separated 2,500 feet
    TagsACC, Environmental Impact Statement, FAA, NEPA, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac Airport Master PlanFolderBox 16
  • 1995-07-21

    Airport Impact Assistance Strategy: Work Program Draft, City of Burien

    A 1995 City of Burien memorandum and accompanying draft strategy paper outline concerns about the negative impacts of constructing a third runway at Seattle-Tacoma International Airport on surrounding communities, including increased noise, traffic, and neighborhood blight. The document warns that heavy truck traffic, expanded air traffic noise 'shadow,' and construction disruption could drive down property values, destabilize local businesses, and accelerate community deterioration. It calls for proactive planning and mitigation efforts, while criticizing the Environmental Impact Statement (EIS) for inadequately addressing these impacts.
    TagsACC, City of Burien, Environmental Impact Statement, NEPA, Third RunwayFolderThird Runway
  • 1995-04-01

    ACC Comments on the Proper Scope of the Environmental Impact Statement for a Proposed Development of Seattle-Tacoma International Airport

    The Airport Communities Coalition, representing the cities of Burien, Des Moines, Normandy Park, and Tukwila, Washington, submitted formal scoping comments to the FAA and Port of Seattle regarding the proper scope of an Environmental Impact Statement for a proposed expansion of Seattle-Tacoma International Airport. The comments address key issues including the purpose and need for the project, the role of Puget Sound Regional Council planning, and the requirement for the FAA to independently fulfill its obligations under the National Environmental Policy Act. The document also calls for the EIS to account for connected and cumulative impacts, including planned land-side facility improvements and the Part 150 Noise Mitigation Program.
    TagsACC, Environmental Impact Statement, FAA, NEPA, Third RunwayFolderACC
  • 1992-04-09

    Seattle Community Council Federation v. F.A.A., 961 F.2d 829 (9th Cir. 1992)

    In 1992, the Ninth Circuit Court of Appeals upheld the FAA's decision to change flight patterns for turbine-powered aircraft at Seattle-Tacoma International Airport without preparing a full Environmental Impact Statement. The FAA had issued a Finding of No Significant Impact based on a computer noise model using the 65 decibel day-night sound level as the threshold for significant noise impact, which the court found to be a reasonable approach. The Seattle Community Council Federation had challenged the decision, arguing that the FAA failed to adequately assess the noise effects on surrounding communities.
    TagsEnvironmental Impact Statement, FAA, Four Post Plan, NEPA, SCCF, Seattle Community Council FederationFolderFour Post Plan
  • 1990-03-27

    Final environmental assessment for proposed changes to air traffic arrival and departure routes at Seattle-Tacoma International Airport

    This 1990 Final Environmental Assessment, prepared by the FAA's Air Traffic Division in Seattle, evaluates proposed changes to arrival and departure flight routes at Seattle-Tacoma International Airport. The document was signed by Air Traffic Division Manager Temple H. Johnson, Jr. on March 27, 1990, and examines the potential environmental impacts of rerouting aircraft traffic in and out of Sea-Tac. It serves as an official federal record relevant to noise and environmental policy affecting communities around the airport.
    TagsAir Traffic Control, environmental assessment, FAA, NEPA, Sea-Tac AirportFolderFederal
  • 1990-01-01

    Final environmental assessment: Proposed changes to air traffic arrival and departure routes at Seattle-Tacoma International Airport, Volume II

    This 1990 Final Environmental Assessment, published by the U.S. Department of Transportation's Federal Aviation Administration, examines proposed changes to air traffic arrival and departure routes at Seattle-Tacoma International Airport. Volume II of the document compiles public comments received in response to the Draft Environmental Assessment, reflecting community input on how the proposed route changes could affect noise and other environmental conditions in the Seattle, Washington area.
    TagsAir Traffic Control, environmental assessment, FAA, NEPA, Sea-Tac AirportFolderFederal
  • 1980-03-04

    Proposed Highline Communities Plan Area Zoning: Transmittal Letter from King County Planning Division

    A March 1980 memo from King County's Planning Division manager Karen Rahm notifies recipients about the Proposed Highline Communities Plan Area Zoning, a zoning framework designed to implement the land use guidelines of the 1977 Highline Communities Plan. The memo states that a supplemental draft Environmental Impact Statement was being prepared and would be published in Spring 1980, after which the zoning proposal would be sent to the County Council for adoption. Handwritten notes on the reverse reference page 56, suggesting a potential rezoning from SR to ML (Medium Light industrial) with consideration of buffer zones around ML areas.
    TagsEnvironmental Impact Statement, Highline Community Plan, King County, King County Council, Land Use, NEPAFolderKing County

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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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