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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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  • 2018-02-20

    Burien Airport Committee (BAC) agenda, February 20, 2018

    The Burien Airport Committee (BAC) met on February 20, 2018 to discuss aviation capacity concerns near Sea-Tac Airport, including responses to Resolution No. 396, which calls for addressing regional aviation capacity needs in western Washington. The agenda covered updates on several airport studies, an interlocal agreement among four cities to jointly respond to the Sustainable Airport Master Plan (SAMP) Environmental Impact Statement (EIS), and ongoing noise-related efforts such as the Quiet Skies Burien initiative. Draft minutes from October 2017 reflect earlier committee work on scoping questions for the EIS and efforts to coordinate a unified voice among nearby airport-impacted cities.
    TagsBAC, Burien Airport Committee, EIS, PSRC, SAMP
  • 2017-11-01

    Puget Sound Gateway Program – Phase 1 of the SR 509 Completion Project: Noise technical report

    This 2017 Noise Technical Report, prepared by The Greenbusch Group for the Washington State Department of Transportation, evaluates the noise impacts of Phase 1 of the SR 509 Completion Project near Seattle-Tacoma International Airport. It compares the proposed highway improvements against a 2003 environmental impact study, assessing changes in noise levels, affected residents, and noise abatement measures such as sound walls. The report concludes with recommendations for minimizing construction and long-term traffic noise impacts on surrounding communities.
    TagsEIS, NEPA, Noise, SR509, WSDOT
  • 2013-10-23

    Future (2018) NEM/NCP Noise Exposure Map: Seattle-Tacoma International Airport 14 CFR Part 150 Study Update

    This map, prepared by Landrum & Brown for the Port of Seattle's 14 CFR Part 150 Study Update, shows projected aircraft noise exposure around Seattle-Tacoma International Airport for the year 2018. It illustrates three noise contour zones (DNL 65, 70, and 75 dBA), with the total area above DNL 65 dBA covering approximately 7.3 square miles and affecting an estimated 3,771 housing units and 9,712 residents. The map also identifies noise-sensitive land uses such as schools, churches, hospitals, and libraries within the affected area, and was certified by the Port of Seattle's Director of Aviation Planning and Environmental Programs.
    TagsEIS, Environmental Impact Statement, Landrum & Brown, Noise Exposure Update, Part 150, Port Of Seattle, Sea-Tac Airport, Third Runway
  • 2001-08-02

    Exhibit 96: Email — Briefing Material for Governor on Sea-Tac 3rd Runway Project

    Email from Dianne Pastore, Ecology Director’s Office, to Raymond Hellwig and Curt Hart (cc: Thomas Fitzsimmons, Sheryl Hutchison) requesting briefing materials for Tom Fitzsimmons’ meeting with the Governor and Paul Isaki on the SeaTac 3rd Runway Project. Materials requested by Dennis Clark, Governor’s Office, by COB Tuesday August 7, 2001. AR 017821, Exhibit 96.
    TagsACC, Ecology, EIS, Pollution Control Hearings Board, Sea-Tac Airport, Third Runway
  • 2001-06-22

    EXH AR021830: GeoSyntec Letter — ACC Response to Comments, West MSE Wall Seismic Stability, Third Runway

    GeoSyntec Consultants, hired by the Airport Communities Coalition, wrote to the U.S. Army Corps of Engineers and Washington State Department of Ecology in June 2001 raising serious technical concerns about the proposed Third Runway Expansion at Seattle-Tacoma International Airport. The letter challenges the Port of Seattle's geotechnical analysis for the West Mechanically Stabilized Earth (MSE) Wall, arguing that soil strength testing was insufficient, the extent of liquefiable material may have been underestimated, and seismic stability analyses were being performed incorrectly. GeoSyntec concluded that the Port had not yet demonstrated the wall could be safely and economically constructed to withstand potential seismic loads without unacceptable deformation.
    TagsACC, Airport Communities Coalition, EIS, Mechanically Stabilized Earth, Pollution Control Hearings Board, Port Of Seattle, Third Runway
  • 2001-05-14

    EXH AR050078: Draft Memorandum — Proposed Liquefaction Procedure Under Walls and Slopes, Third Runway Embankment

    Draft memorandum dated May 14, 2001, from Douglas Lindquist (E.I.T.) and Michael Bailey (P.E.) of Hart Crowser, Inc. to Pete Douglass (P.E.) and Embankment Technical Review Board (ETRB), CC Jim Thomson (P.E.) HNTB, project 4978-30. Describes proposed liquefaction potential evaluation procedure for areas beneath walls and slopes of the Third Runway embankment at Sea-Tac Airport.
    TagsACC, Earthquake, EIS, Pollution Control Hearings Board, Sea-Tac Airport, soil, Third Runway
  • 2001-02-13

    EXH AR023568: CV Patrick C. Lucia, GeoSyntec Consultants

    This document is a professional curriculum vitae for Patrick C. Lucia, a civil engineer and Principal at GeoSyntec Consultants specializing in geotechnical engineering, landslides, and slope stability. It details his education, professional registrations, career history, and representative project experience, including bridge seismic reviews, landslide repairs, and reservoir stability evaluations in California. Note: This document does not appear to contain content related to Sea-Tac Airport noise policy.
    TagsACC, EIS, PCHB, Pollution Control Hearings Board, Third Runway
  • 2000-10-26

    EXH 381: Third Runway Embankment Infiltration Memorandum

    A 2000 engineering memorandum from HNTB and Hart Crowser advises the Third Runway Design Team against artificially increasing stormwater infiltration within the proposed runway embankment. The memo warns that enhanced infiltration would raise risks of slope instability, soil liquefaction during earthquakes, and long-term maintenance problems that could not be remedied once the embankment was built. The engineers concluded that these safety and structural risks outweighed any stormwater detention benefits that increased infiltration might provide.
    TagsACC, EIS, Pollution Control Hearings Board, soil, Stormwater, Third Runway
  • 1998-07-01

    EXH AR041639: Findings of Fact, Conclusions of Law and Final Order — City of Des Moines et al. v. Port Of Seattle et al.

    King County Superior Court Findings of Fact, Conclusions of Law and Final Order by Judge Robert H. Alsdorf in consolidated cases No. 96-2-20357-2 KNT, No. 97-2-13908-2 KNT, No. 97-2-22276-1 KNT, No. 98-2-04911-1 KNT. Challenges Port Of Seattle Resolutions 3212 and 3245 approving the Sea-Tac Master Plan Update including construction of a third runway at Seattle-Tacoma
    TagsACC, Airport Communities Coalition, Des Moines, EIS, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac Airport
  • 1998-06-11

    Documents catalogued as received in 1990

    This is a library catalog sheet listing documents received in 1990 related to regional planning and community concerns in the Seattle-Tacoma area. It includes two versions of the 'Vision 2020' environmental impact statement published by the Puget Sound Regional Council (PSRC), as well as a community document titled 'The Injustice of It All' authored by a group called Enraged Housewives. The catalog was originally created in June 1998 and last revised in August 2002.
    TagsEIS, Environmental Impact Statement, History, PSRC, Puget Sound Regional Council, RCAA

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    Add to CalendarMWednesday Aug 26, 5:00pm - 7:00pm
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    START meetingagenda 2026826 final 0 pdf

    Meeting Objectives Introduce the primary feedback themes identified by StART members regarding StART’s Operating Procedures and determine areas that may warrant future discussion. 5:00 PM – Welcome Meeting Management Welcome Lead: Andrés Mantilla, Facilitator, Uncommon Bridges; Wendy Reiter, Airport Managing Director, POS 5:15 PM – Dinner: All participants eat. 5:30 PM – StART Operating Procedures

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    Cawg agenda sep 3 26 virtual pdf

    Meeting Agenda 10:00 a.m. – 10:15 a.m. | Welcome – Evan Nordby, Chair a. Introductions and Agenda Reviewb. Status of appointments and non-voting member invitationsc. Other updates as necessary 10:15 a.m. – 11:00 a.m. | Is it practical and legal to operate the western Washington [Puget Sound] airports as a single airport system? – Consultant

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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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