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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.
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TagThird Runway(1067)

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  • 2000-11-15

    EXH AR023671: Ecology Letter — Agreed Order 97TC-N122 Task Completion Status

    A November 2000 letter from the Washington State Department of Ecology to Seattle-Tacoma International Airport summarizes the completion status of environmental tasks required under Agreed Order 97TC-N122. The order mandated a comprehensive groundwater study of the Airport Operations and Maintenance Area (AOMA), including hydrogeological research, contamination mapping, and development of groundwater flow and contaminant transport models. While several research and data-collection tasks were completed, key items such as identifying unknown contamination sources, developing operational groundwater and transport models, and preparing a final Phase I Groundwater Study Report remained incomplete.
    TagsACC, Ecology, PCHB, Pollution Control Hearings Board, Sea-Tac Airport, Third RunwayFolderBox 10
  • 2000-11-13

    EXH AR023669: Memo to Wietfeld & Wang — Info for Questions-To-Port List

    A November 2000 memo from Washington State Department of Ecology's Roger Nye raises concerns that the Port of Seattle failed to adequately identify potential soil and groundwater contamination sites at Sea-Tac Airport, as required by an Agreed Order. Nye outlines four key deficiencies, including the Port's failure to account for historical use of chlorinated solvents in aircraft washing, overlooked fueling facilities, and incomplete identification of contamination sources based on historical operations rather than just historical facilities. The memo calls for a thorough, honest effort to identify all potential contamination areas that could pose risks to nearby drinking water wells and surface waters.
    TagsACC, Ecology, PCHB, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac Airport, Third RunwayFolderBox 10
  • 2000-11-13

    EXH AR029048: Sea-Tac Airport Third Runway 401 Permit Negotiations Final Draft Meeting Notes, November 13, 2000

    Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. for Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held November 13, 2000, 1:00–3:30 PM. Attendees include representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Ann Kenny, Dave Garland), Port Of Seattle (Elizabeth Leavitt, Michael Cheyne, Keith Smith), King
    TagsACC, Clean Water Act, Ecology, NPDES, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 11
  • 2000-11-09

    EXH AR046304: Stability Review of RECo 30% Design — Third Runway Embankment Project

    Memorandum dated November 9, 2000 from Barry Chen, P.E. of Hart Crowser to Jim Thomson, P.E. of HNTB (J-4978-30), reviewing RECo’s 30% design for NSA, West, and South MSE (Mechanically Stabilized Earth) walls for the Third Runway Embankment Project at Sea-Tac Airport. Using SLOPE/W limit equilibrium analyses and FLAC displacement-based modeling, Hart Crowser identified marginal
    TagsACC, Construction, Mechanically Stabilized Earth, Pollution Control Hearings Board, Sea-Tac Airport, Third RunwayFolderBox 19
  • 2000-11-07

    Exhibit 2108: Email Chain — Tom Luster, Paula Ehlers, Chris Gower Regarding Highline Times Misquote on Third Runway Reassignment

    Email chain (AR 033715, ECY00000691) between Tom Luster and supervisor Paula Ehlers, dated November 7, 2000, discussing a November 1, 2000 Highline Times article titled ‘Opponents leery as third runway reviewers changed.’ Luster states he was incompletely quoted by reporter Chris Gower regarding his feelings about being reassigned from the third runway review project —
    TagsACC, Ecology, Highline Times, Pollution Control Hearings Board, Sea-Tac Airport, Third RunwayFolderBox 14
  • 2000-11-07

    EXH AR029041: Sea-Tac Airport Third Runway 401 Permit Negotiations Final Draft Meeting Notes, November 7, 2000

    Final draft meeting notes from Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held November 7, 2000, prepared by Kate Snider of Floyd & Snider Inc. Attendees included Ray Hellwig, Kevin Fitzpatrick, and Ann Kenny from Washington Department of Ecology; Elizabeth Leavitt from Port Of Seattle; David Masters from King County; and Paul Fendt and
    TagsACC, Clean Water Act, Ecology, Pollution Control Hearings Board, Port Of Seattle, Stormwater, Third RunwayFolderBox 11
  • 2000-10-31

    EXH AR028015: Port Of Seattle Third Runway Flow Augmentation/Water Rights Agenda — October 31, 2000

    Agenda for Port Of Seattle Third Runway Flow Augmentation/Water Rights meeting dated October 31, 2000, with handwritten notes. Attendees included Port Of Seattle, Department of Ecology, Attorney General’s Office, and Seattle Public Utilities (SPU). Topics covered potential sources of stream flow augmentation water for Des Moines Creek: SPU Highline Well Field, Highline Water District Well
    TagsACC, Des Moines Creek, Ecology, Pollution Control Hearings Board, Port Of Seattle, Third Runway, WACFolderBox 10
  • 2000-10-31

    EXH AR023764: Agenda — Third Runway Flow Augmentation/Water Rights Meeting

    This October 31, 2000 agenda document outlines a meeting between the Port of Seattle, the Department of Ecology, the Attorney General's Office, and Seattle Public Utilities to address water rights issues related to flow augmentation in Des Moines Creek, connected to the Sea-Tac Airport Third Runway project. The meeting focused on identifying potential sources of stream flow augmentation water, including the SPU Highline Well Field, Highline Water District wells, detained stormwater, and reclaimed water. Key discussion points included whether water right changes were necessary, what approvals were required from the Department of Ecology, and how to develop an action plan for resolving outstanding legal and regulatory issues.
    TagsACC, Des Moines Creek, Ecology, Pollution Control Hearings Board, Port Of Seattle, Third Runway, Water QualityFolderBox 10
  • 2000-10-31

    EXH AR029033: Sea-Tac Airport Third Runway 401 Permit Negotiations — Final Draft Meeting Notes, October 31, 2000

    Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. for the Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held October 31, 2000, 8:00–11:00 AM. Attendees included representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Ann Kenny), Port Of Seattle (Michael Cheyne, Elizabeth Leavitt, Keith Smith), King County
    TagsACC, Des Moines Creek, Ecology, Pollution Control Hearings Board, Port Of Seattle, Stormwater, Third RunwayFolderBox 11
  • 2000-10-30

    EXH AR023747: Ecology Internal Deliberative Memo — Natural Resource Mitigation Plan Review Tasks, Dyanne Sheldon

    A October 30, 2000 internal memo from Erik Stockdale of Washington State Department of Ecology outlines recommended tasks for contractor Dyanne Sheldon, who was hired to evaluate the natural resource mitigation plan for a Port project near Sea-Tac Airport. The memo recommends an open-ended 'Time and Materials' contract and calls for a firewall between Sheldon and the Port, citing concerns about the Port playing Ecology and the Army Corps of Engineers against each other. Key tasks include reviewing wetland mitigation plans for the Des Moines, Walker, and Miller creek basins, evaluating stormwater consistency, and drafting Section 401 Clean Water Act permit conditions.
    TagsACC, Auburn Wetland, Clean Water Act, Ecology, PCHB, Pollution Control Hearings Board, Third RunwayFolderBox 10

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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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