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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.
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  • 2024-10-01

    Chapter 3: Affected Environment — Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects

    This draft Environmental Assessment from October 2024 examines the existing conditions around Seattle-Tacoma International Airport (SEA) as part of the Sustainable Airport Master Plan Near-Term Projects. Using 2022 as the baseline year, it describes SEA's location on approximately 2,800 acres in the City of SeaTac, situated 12 miles south of downtown Seattle and surrounded primarily by residential neighborhoods. The study covers a General Study Area of 3,692 acres to identify where proposed airport development actions could have direct or indirect environmental impacts on nearby communities.
    Tagsenvironmental assessment, Landrum & Brown, NEPA, SAMP, Sea-Tac Airport, Sustainable Airport Master PlanFolder2024 Draft EA
  • 2024-10-01

    Seattle-Tacoma International Airport Environmental Assessment for the SAMP Near-Term Projects: Chapter 2 — Alternatives

    This draft Environmental Assessment chapter from October 2024 outlines the process used to evaluate alternatives to proposed construction and expansion projects at Seattle-Tacoma International Airport (SEA). Using a two-step screening process, planners assessed public suggestions — such as building a new airport, using high-speed rail, or limiting growth — against the project's core purpose of serving 56 million annual passengers at an optimal level of service, rejecting most suggestions as unfeasible or insufficient. A No Action Alternative is also included, which assumes none of the proposed improvements would be built, though several independent projects already underway or planned by 2032 would still proceed.
    Tagsenvironmental assessment, Landrum & Brown, NEPA, SAMP, SAMP Draft EA, Sustainable Airport Master PlanFolder2024 Draft EA
  • 2024-10-01

    Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects: Chapter 1, Introduction and Purpose & Need

    The Port of Seattle is preparing an Environmental Assessment for 31 near-term improvement projects at Seattle-Tacoma International Airport (SEA), covering upgrades to taxiways, runways, terminals, and support facilities. The projects, expected to be operational by 2032, aim to reduce crowding, long lines, and flight delays that have grown as passenger demand has increased. The Federal Aviation Administration (FAA) will review the findings to determine whether the projects will significantly impact the surrounding environment, potentially affecting noise levels for nearby communities.
    TagsFAA, Landrum & Brown, NEPA, SAMP, SAMP Draft EA, Sustainable Airport Master PlanFolder2024 Draft EA
  • 2024-10-01

    SAMP Exhibit 3-3 Area of Potential Effects (APE) Water

    Exhibit 3-3 from the Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan (SAMP) Near-Term Projects, prepared by Landrum & Brown, dated October 2024 (Draft). The map depicts the Biological Resources ESA Study Area boundary (shown in blue dashed line) surrounding the airport property, extending to Puget Sound to the west and encompassing nearby waterways including Miller Creek and Walker Creek.
    Tagsenvironmental assessment, Landrum & Brown, Map, NEPA, SAMP, Sea-Tac AirportFolderChapter-3 (Affected Environment)
  • 2024-10-01

    Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects: Chapter 7 References

    This document is the References section of the Environmental Assessment for Seattle-Tacoma International Airport's Sustainable Airport Master Plan Near-Term Projects, prepared by Landrum & Brown in October 2024. It lists the sources cited across four chapters, including federal regulations, FAA advisory circulars, technical memoranda, city and county planning documents, and environmental studies used to evaluate the airport's proposed near-term development projects. Key references cover topics such as air quality, greenhouse gas emissions, stormwater management, facility requirements, and land use planning for the communities surrounding Sea-Tac Airport.
    TagsEnvironmental Impact Statement, Landrum & Brown, NEPA, SAMP, SAMP Draft EA, Sustainable Airport Master PlanFolder2024 Draft EA
  • 2024-10-01

    Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects: Chapter 6 — List of Preparers

    This section of the Seattle-Tacoma International Airport Environmental Assessment lists the individuals and organizations responsible for preparing the document, including staff from the FAA, Port of Seattle, and several consulting firms. The team covered a wide range of technical areas, with specialists handling noise analysis, air quality, surface transportation, wetlands, cultural resources, and public engagement. The assessment was produced in October 2024 as a draft under the airport's Sustainable Airport Master Plan for near-term projects.
    Tagsenvironmental assessment, FAA, Landrum & Brown, NEPA, Port Of Seattle, SAMP, Sustainable Airport Master PlanFolder2024 Draft EA
  • 2024-10-01

    Seattle-Tacoma International Airport Environmental Assessment for the SAMP Near-Term Projects: Chapter 5 — Cumulative Impacts

    This section of the Seattle-Tacoma International Airport Environmental Assessment examines cumulative impacts from past, present, and reasonably foreseeable future development projects at and around SEA airport, covering the period from 2017 through 2032. It reviews actions by the Port of Seattle and surrounding cities and agencies — including hotel construction, terminal expansions, and flight procedure changes — to assess how their combined environmental effects, such as noise, emissions, and land use changes, may affect nearby communities. Projects beyond 2032 or those in the long-term vision phase are excluded from detailed analysis due to insufficient specificity.
    TagsCEQ, environmental assessment, Landrum & Brown, NEPA, SAMP, Sustainable Airport Master PlanFolder2024 Draft EA
  • 2024-06-01

    Environmental Justice Protocol: Seattle-Tacoma International Airport

    This document is an Environmental Justice Protocol prepared by Landrum & Brown, Incorporated for the Federal Aviation Administration and the Port of Seattle in June 2024. It addresses socioeconomics, environmental justice, and children's health considerations related to Seattle-Tacoma International Airport. The protocol provides a framework for evaluating how airport-related impacts may affect minority, low-income, and other vulnerable populations in surrounding communities.
    TagsEnvironmental Justice, FAA, Landrum & Brown, NEPA, Port Of Seattle, SAMP, 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
  • 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

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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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