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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.

TagSEPA(233)

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  • 2013-09-24

    Part 150 Public Comment Process Summary — Commission Presentation, September 24, 2013 (Slide 13)

    A Port of Seattle presentation slide summarizing the Part 150 and SEPA public comment process: Draft documents were published and a 45-day comment period began April 15, 2013; a public hearing was held May 15, 2013; the comment period ran April 15 through May 30, 2013; over 70 comments were received covering general noise, abatement, land mitigation, program management, Part 150 process, environmental issues, and other topics. Responses to all comments are contained in the Final Part 150 document.
    TagsPart 150, Port Of Seattle Commission, Sea-Tac Airport, SEPAFolderCommission Presentation
  • 2013-04-12

    SEPA Determination of Non-Significance (DNS) of Proposed Action: Sea-Tac Airport Part 150 Noise Compatibility Planning Study

    The Port of Seattle issued a State Environmental Policy Act (SEPA) Determination of Non-Significance for the Sea-Tac Airport Part 150 Noise Compatibility Planning Study, concluding the plan would not have a significant adverse impact on the environment. The study outlines 23 noise mitigation measures—including limiting nighttime flights, sound-insulating homes and schools, and constructing a Ground Run-Up Enclosure—aimed at reducing aircraft noise for communities surrounding Seattle-Tacoma International Airport. A 45-day public comment period was open through May 30, 2013, with the determination signed by Elizabeth Leavitt, Director of Aviation Planning and Environmental Programs.
    TagsElizabeth Leavitt, Noise Mitigation, Part 150, Port Of Seattle, SEPAFolder2013
  • 2012-06-15

    Second Development Agreement: City of Des Moines and Port Of Seattle — Des Moines Creek Business Park

    This Second Development Agreement, dated June 15, 2012, is a formal planning contract between the City of Des Moines, Washington, and the Port of Seattle governing the development of the Des Moines Creek Business Park (DMCBP), a multi-phase commercial and logistics project located near Sea-Tac Airport. The agreement outlines development regulations, zoning, environmental review requirements under SEPA, transportation infrastructure improvements, and land use phases including a logistics park, retail or business park, and an area for Puget Sound Energy/Benaroya. It also addresses mitigation measures, master plan approvals, recreation path requirements, and a purchase option for retail development on Port-owned property.
    TagsCity Of Des Moines, Des Moines Creek Business Park, DMCBP, Port Of Seattle, SEPAFolderDes Moines Creek Business Park
  • 2012-06-15

    Second Development Agreement: City of Des Moines and Port Of Seattle

    This Second Development Agreement, dated June 15, 2012, is a formal contract between the City of Des Moines, Washington, and the Port of Seattle governing the planned development of the Des Moines Creek Business Park (DMCBP). The agreement outlines development regulations, phased project areas including a logistics park and retail or business park, transportation infrastructure improvements, and environmental review requirements under the State Environmental Policy Act (SEPA). It serves as a key planning document shaping land use and development near Seattle-Tacoma International Airport, with direct implications for surrounding communities affected by airport-related growth and noise policy.
    TagsCity Of Des Moines, Des Moines Creek Business Park, DMCBP, Port Of Seattle, SEPAFolderDes Moines Creek Business Park
  • 2011-05-03

    Resolution No. 3650, as amended

    Resolution No. 3650 was adopted by the Port of Seattle Commission on May 3, 2011, updating the Port's policies and procedures under the State Environmental Policy Act (SEPA) to reflect changes in law and improve effectiveness. The resolution requires the Port to analyze and, where appropriate, mitigate the environmental impacts of its proposals, including consideration of greenhouse gas emissions and climate change. It supersedes all prior related resolutions and formally designates policies that may be used to condition or deny actions under SEPA's substantive authority.
    TagsClimate, Environmental Review, Port Of Seattle, Port Of Seattle Commission, SEPAFolderResolutions
  • 2009-10-05

    Northeast Redevelopment Area (NERA): City of Burien Draft Supplemental Environmental Impact Statement

    The City of Burien's 2009 Draft Supplemental Environmental Impact Statement (SEIS) examines redevelopment options for the Northeast Redevelopment Area (NERA), located near Sea-Tac Airport. Three alternatives are evaluated, including rezoning the area to allow airport-compatible uses such as light industrial, office, and limited retail (Alternative 1), a more restricted version without auto or general retail sales (Alternative 2), or maintaining the existing SPA-4 zoning with no changes (Alternative 3). The document is relevant to Sea-Tac Airport noise policy as all proposed land use changes are explicitly designed to ensure compatibility with airport operations in the surrounding community.
    TagsCity of Burien, Environmental Impact Statement, NERA, Northeast Redevelopment Area, SEPAFolderBurien
  • 2007-07-16

    VISION 2040 supplemental draft environmental impact statement

    The VISION 2040 Supplemental Draft Environmental Impact Statement, published by the Puget Sound Regional Council in July 2007, identifies a Preferred Growth Alternative for managing forecasted population and development growth in the Puget Sound region through the year 2040. It supplements a May 2006 Draft EIS that examined four conceptual growth alternatives, adding analysis of environmental impacts associated with the preferred option. The document was prepared in accordance with Washington State's Environmental Policy Act and invites public comment on regional growth planning policies.
    TagsEnvironmental Impact Statement, PSRC, Puget Sound Regional Council, Regional Transportation Plan, SEPAFolderPuget Sound Regional Council
  • 2002-11-04

    KCIA draft master plan and SEPA/EIS and NEPA/EA executive office briefing

    This 2002 executive briefing presents the draft Master Plan and environmental review documents (SEPA/EIS and NEPA/EA) for King County International Airport (Boeing Field), located five miles south of downtown Seattle. The airport, which covers 594 acres and hosts 150 tenant businesses and 479 based aircraft, recorded approximately 290,000 flight operations in 2001. The FAA accepted the Master Plan in Fall 2001 and approved the Airport Layout Plan in March 2002, setting the stage for future development and noise impact assessments.
    TagsEnvironmental Impact Statement, KCIA, Master Plan, NEPA, RCAA, SEPAFolderRCAA
  • 2002-10-23

    EXH AR044222: Court of Appeals Order Granting Motion for Reconsideration in Part and Amending Opinion — ACC et al. v. Port Of Seattle et al., No. 43100-5-I

    Washington Court of Appeals Division One order granting in part Port Of Seattle’s motion for reconsideration of the November 15, 1999 opinion in No. 43100-5-I. Parties include City of Des Moines, City of Burien, City of Federal Way, City of Normandy Park, City of Tukwila, Highline School District No. 401, Airport Communities Coalition (ACC) as
    TagsACC, Airport Communities Coalition, Caselaw, Des Moines, Pollution Control Hearings Board, Port Of Seattle, SEPAFolderBox 18
  • 2002-10-23

    EXH AR039919: Resolution No. 3211 — Port Of Seattle SEPA Appeal Procedures

    Resolution No. 3211 of the Port Commission of the Port of Seattle, King County, Washington, repealing sections 15.4 and 21 and subsections 21.1, 21.2, 21.3, 21.4, and 21.5 of Port Resolution 3028, and adopting new SEPA administrative appeal procedures under ch. 43.21C RCW and chapter 197-11 WAC. Establishes appealable SEPA decisions (EIS adequacy and issuance
    TagsACC, Environmental Impact Statement, Pollution Control Hearings Board, Port Of Seattle, RCW, SEPA, WACFolderBox 17

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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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