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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.

Since 2016, we've worked to obtain justice for residents living under the flight path. Noise. Pollution. Health. Compensation..

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TagSEPA(10)

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  • 2025-12-08 13:21

    NEPA SEPA Timeline Des Moines Airport Advisory Committee 08 Dec 2025 Agenda

    TagsDes Moines Aviation Advisory Committee, NEPA, SAMP, SAMP Four City ILA, SEPA
  • 2025-12-08 00:00

    Des Moines Airport Advisory Committee Meeting Agenda and Minutes

    Airport Advisory Committee meeting agenda for December 8, 2025, including items on SAMP updates, StART meeting updates, complaints/communications, and committee work plan. Responses on noise complaint from Laurel Hughes. Also includes minutes from the November 10, 2025 meeting with discussion of Q&A with Steve Edmiston and various airport-related updates.
    TagsAirport, City Of Des Moines, Des Moines, NEPA, SAMP, SEPA, StART
  • Airport Advisory Committee 08 Dec 2025 Agenda Pdf 1 Pdf
    2025-12-08 00:00

    Airport Advisory Committee Meeting Agenda and Minutes

    Airport Advisory Committee meeting agenda for December 8, 2025, including items on SAMP updates, StART meeting updates, complaints/communications, and committee workplan. Also includes minutes from the November 10, 2025 meeting with discussion of Q&A with Steve Edmiston and various airport-related updates.
    TagsAirport, Des Moines, NEPA, SAMP, SEPA, StART
  • 2025-10-22 00:00

    Programmatic Environmental Checklist – Seattle-Tacoma International Airport Flight Corridor Management Program

    Environmental checklist for SEA’s Flight Corridor Management Program, which identifies and removes tree obstructions from airport flight corridors every five years to comply with FAA regulations. The document outlines the program’s background, implementation cycles, and environmental review process.
    CategoriesKey Documents TagsAirport, Airport Expansion, FAA, Port Of Seattle, SEPA
  • 2025-09-10 00:00

    Jennifer Sanscrainte Ogden Murphy Wallace SAMP SEPA Engagement Letter – Special Environmental Counsel Services

    Legal engagement letter from Ogden Murphy Wallace, P.L.L.C. to the City of SeaTac for special environmental counsel services regarding Jennifer Sanscrainte Ogden Murphy Wallace SAMP SEPA Engagement Letter – Special Environmental Counsel Services for environmental review processes for the Port of Seattle’s Sustainable Airport Master Plan (SAMP). The letter outlines hourly billing rates, scope of
    Tagsletter, NEPA, Port Of Seattle, SAMP, seatac, SEPA
  • 2024-09-30 21:05

    NEPA and SEPA Comparison Diagram

    Diagram contrasting NEPA (federal) and SEPA (Washington state) environmental review processes.
    TagsEnvironmental Review, NEPA, SEPA
  • 2019-03-28 16:39

    Arlyn Purcell

    Currently, Arlyn Purcell is the SEPA contact for the Sea-Tac Airport SAMP program. The Port of Seattle Selected Arlyn Purcell, AICP, as New Director, Aviation Environment and Sustainability SEATTLE, WA– Following a nationwide search, thePort of Seattle has selectedArlyn Purcell, AICP to be the new Director, Aviation Environment and Sustainability at the Port of Seattle.
    CategoriesPeople TagsNEPA, Port Of Seattle, SAMP, SEPA
  • 2018-09-28 20:56

    State of Washington Code: SEPA

    The section of the State of Washington’s legal code concerning SEPA
    CategoriesResources TagsSEPA
  • 2018-06-21 00:21

    Port Of Seattle – Resolution No 3212

    A RESOLUTION of the Port Commission of the Port of Seattle, King County, Washington, adopting a Master Plan Update for Seattle-Tacoma International Airport, approving development of a new dependent air carrier runway, authorizing certain actions relating to the new runway and other improvements in the Master Plan Update, and committing to fulfill additional noise reduction measures in accordance with Puget Sound Regional Council Resolution A-96-02. WEBEREAS, the number of passengers served by Seattle-Tacoma International Airport (STIA) increased from approximately 4.7 million in 1970 to approximately 2 2 . 8 million in 1995, an increase of 385%, and the Master Plan Update forecast prepared in 1994 projects that the number of passengers will continue to increase significantly in the future; and VHEREAS, the number of airctaft operations and the amount of cargo tonnage at STIA increased from 150,676 operations in 1970 to 386,500 operations in 1995 and from 130,171 metric tons of cargo in 1970 to 408,200 metric tons in 1995, and the Master Plan Update Forecast prepared in 1994 projects that the number of aircraft operations and the amount of cargo tonnage will increase significantly in the future; and WHEREAS* in the mid-1980rs, the Port completed the Airport Comprehensive Planning Review 6 Airspace Update Study which concluded that the existing runway system at STIA would not be capable of serving efficiently the increasing demand past the year 0 0 , and the Federal Aviation Administration (FAA) initiated an Airport Capacity Enhancement StUdy which concluded that. there was extensive d'.lay primarily…
    CategoriesKey Documents TagsPort Of Seattle, Puget Sound Regional Council, Rv, SEPA, Third Runway
  • 2018-03-19 00:00

    Des Moines letter to Erika Harris on Sea-Tac Vision 2050 Scoping

    Des Moines letter to Erika Harris (SEPA responsible official for PSRC) on Sea-Tac Vision 2050 Scoping 3.19.18
    TagsSEPA
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  • PSCAA Advisory Council Meeting Agenda
    Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
    1904 3rd Avenue, Suite 105, Seattle, WA 98101
    Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]

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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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This is the first study to combine a one-year mobile monitoring campaign with PMF (Positive Matrix Factorization) analysis to simultaneously estimate source-specific air pollution exposures and emission factors of different vehicle types. This methodology can be extended to other metropolitan areas.
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