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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.

TagElizabeth Leavitt(28)

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  • 2012-09-11

    Port Of Seattle Commission memorandum – Airport Sustainability Master Plan

    ★
    In September 2012, the Port of Seattle Commission considered a $6 million request to create a new Sustainability Master Plan (SMP) for Seattle-Tacoma International Airport, replacing an outdated 15-year-old plan. The update was driven by nearly 50% passenger growth since the last plan, rising capacity pressures on roadways, terminals, and taxiways, and the need to meet FAA requirements for federal grants and environmental permits. The SMP aimed to guide long-term airport development through 2015, balancing future growth with sustainability goals within the airport's existing footprint.
    CategoriesKey Documents TagsElizabeth Leavitt, Port Of Seattle, SAMP, Sustainable Airport Master Plan, Tay YoshitaniFolderMeetings
  • 2018-01-01

    Part 150 2013 Noise Exposure Map NEM PLOT Future 2018

    This is the Future (2018) Noise Exposure Map (NEM/NCP) for Seattle-Tacoma International Airport, produced as part of a 14 CFR Part 150 Study Update by the Port of Seattle. The map displays DNL noise contour bands (65–70, 70–75, and 75+ dBA) overlaid on surrounding land uses, with a data table showing the DNL 65–70 dBA contour covering 4.4 square miles and affecting an estimated 9,712 people; it includes a Sponsor's Certification signed by Elizabeth Leavitt, Director of Aviation Planning and Environmental Programs for the Port of Seattle.
    TagsDNL65, Elizabeth Leavitt, Noise Countour, Part 150, Sea-Tac AirportFolderPart 150
  • 2017-11-07

    Aviation Advisory Committee Meeting Minutes: November 7, 2017

    The Des Moines Aviation Advisory Committee met on November 7, 2017, to discuss several airport-related topics, including an Air Cargo Study being conducted by the Joint Transportation Committee and updates on the Sustainable Airport Master Plan (SAMP) Environmental Impact Statement process presented by Port of Seattle representatives. Key community concerns raised included nighttime flights, aircraft noise frequency, and whether airport-impacted communities would have a voice in upcoming stakeholder meetings. The committee also nominated member Sheila Brush to represent the City of Des Moines on a new Public Forum Panel headed by the Port's Director of Aviation, expected to launch in early 2018.
    TagsDes Moines Aviation Advisory Committee, Elizabeth Leavitt, Karen Keiser, Port Of Seattle, SAMPFolderAd Hoc Aviation Advisory Committee
  • 2016-04-01

    2015 environmental progress report: Seattle-Tacoma International Airport strategy for a sustainable Sea-Tac

    The 2015 Environmental Progress Report for Seattle-Tacoma International Airport outlines the airport's sustainability achievements under its Strategy for a Sustainable Sea-Tac (S3), including increasing the recycling rate from 23 to 34 percent, pursuing renewable natural gas partnerships to cut carbon emissions by 70 percent, and achieving a 90 percent construction waste recycling rate. The report covers environmental, economic, and social sustainability goals integrated with the Port of Seattle's Century Agenda, built on the foundation of the airport's 2009 environmental strategy. Note that this report focuses on broad environmental and sustainability initiatives rather than noise policy specifically.
    TagsCentury Agenda, Elizabeth Leavitt, Port Of Seattle, Sea-Tac Airport, Sustainable Airport Master PlanFolderSea-Tac Airport
  • 2015-12-15

    Sea-Tac Airport Sustainability Goals and Objectives

    A December 2015 presentation by Sea-Tac Airport's Director of Environmental & Planning outlines how the airport is weaving sustainability into its Master Plan across three phases: what and where it builds, how it builds, and how it operates. The plan is guided by the Port of Seattle's Century Agenda and the airport's own Strategy for a Sustainable Sea-Tac (S3), with development concepts for airfield, terminal, and landside areas being screened against sustainability-based evaluation criteria. Key planning constraints include meeting passenger demand growth without adding new runways, improving airfield efficiency through NextGen technology, and converting sustainability goals into measurable decision-making criteria.
    TagsCentury Agenda, Elizabeth Leavitt, Environment, Master Plan, SAMP, Sea-Tac AirportFolderUpdates
  • Airport offers a glimpse at tightening stormwater regulations

    Key takeaways Sea-Tac Airport operates under one of the strictest stormwater permits in the state. Every inch of rain that falls at Sea-Tac generates about 6 million gallons of wasterwater, according to the airport. Despite many toxic chemicals used on-site, such as jet fuel and deicer, the airport reports that its most contaminated area is
    CategoriesFrom The Web TagsEcology, Elizabeth Leavitt, Encyclopedia of Puget Sound, Stormwater
  • 2013-11-20

    Highline Forum Agenda: November 20, 2013

    The November 20, 2013 Highline Forum meeting, held at the Tukwila Community Center, included a Port of Seattle update featuring a recap of the Part 150 noise study and a review of upcoming Sea-Tac Airport capital projects, presented by Port of Seattle staff Stan Shepherd and Elizabeth Leavitt. The forum also addressed a vote on 2014 SW King County legislative positions, which included a new position related to port cooperation, and planning for the following year's meeting schedule and topics. Guidance provided to co-chairs ahead of the meeting outlined procedures for managing the legislative vote and organizing 2014 forum hosting responsibilities among member jurisdictions.
    TagsElizabeth Leavitt, Highline Forum, Part 150, Port Of Seattle, Stan ShepherdFolderHighline Forum 2013
  • 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
  • 2004-06-07

    Water quality certification for U.S. Army Corps of Engineers public notice 1996-4-02325 (Amended-2)

    In June 2004, the Washington State Department of Ecology granted a Water Quality Certification to the Port of Seattle for the construction of a third parallel runway at Seattle-Tacoma International Airport (Sea-Tac), along with related projects such as taxiways, navigational aids, and runway safety areas. The certification, designated Order #1996-4-02325 (Amended-2), was updated to reflect a Washington Supreme Court ruling and confirms that the project complies with applicable provisions of the Clean Water Act and state environmental laws. The approval is subject to conditions including compliance with hydraulic project approvals and stormwater permits issued by state agencies.
    TagsClean Water Act, Ecology, Elizabeth Leavitt, RCAA, Third Runway, Water QualityFolderRCAA
  • 2002-10-21

    EXH AR016567: Prefiled Testimony of Elizabeth M. Leavitt — PCHB No. 01-160, ACC and CASE v. Ecology and Port Of Seattle

    Prefiled direct testimony of Elizabeth M. Leavitt submitted in Pollution Control Hearings Board (PCHB) case No. 01-160, Airport Communities Coalition (ACC) and Citizens Against Sea-Tac Expansion (CASE) v. Department of Ecology and Port Of Seattle. Testimony covers Port Of Seattle’s Aviation Environmental Program, Joint Aquatic Resources Permit (JARPA), 401 Certification, Section 404 projects, Master Plan
    TagsACC, CASE, Elizabeth Leavitt, PCHB, Pollution Control Hearings Board, Port Of SeattleFolderBox 07

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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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