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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.

TagPort Of Seattle(2410)

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  • 2001-09-12

    EXH AR008249: ACC Motion for Stay — Section 401 Certification No. 1996-4-02325 and CZMA Concurrency Statement, Third Runway, PCHB No. 01-133

    Airport Communities Coalition (ACC) Motion for Stay filed with the Washington Pollution Control Hearings Board (PCHB), Case No. 01-133, seeking to stay Section 401 Certification No. 1996-4-02325 and accompanying CZMA concurrency statement issued by Washington State Department of Ecology to Port Of Seattle on August 10, 2001, related to construction of a Third Runway and
    TagsACC, Airport Communities Coalition, Ecology, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 04
  • 2001-09-12

    PCHB Doc 8284: Declaration of Amanda Azous in Support of ACC’s Motion for Stay

    Declaration by Amanda Azous, professional wetland scientist (Society of Wetland Scientist No. 001067) and principal of Azous Environmental Sciences, filed in PCHB Case No. 01-133 in support of Airport Communities Coalition (ACC) motion for stay of Section 401 Certification No. 1996-4-02325 and CZMA concurrency statement issued August 10, 2001 to Port Of Seattle for construction
    TagsACC, Clean Water Act, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 04
  • 2001-09-10

    EXH AR023886: FW: Summary Runway Stipulated Agreement

    A September 2001 internal email summarizes a Stipulated Agreement between the Washington State Department of Ecology and the Port of Seattle regarding the third runway construction at Sea-Tac Airport. The agreement clarifies the scope and duration of water quality certification conditions (401 permit), including perpetual wetland mitigation requirements, 15-year wetland monitoring, and rules governing fill material approval and stormwater management. Key changes also address hydrologic monitoring schedules, buffer requirements, and reporting frequency to ensure environmental protections remain in place during and after construction.
    TagsACC, Ecology, PCHB, Pollution Control Hearings Board, Port Of Seattle, Stormwater, Third RunwayFolderBox 10
  • 2001-09-10

    EXH AR028013: Third Runway Construction Is a Work in Progress

    Port of Seattle webpage (AR028013) describing Third Runway construction progress at Seattle-Tacoma International Airport (Sea-Tac Airport). Details include delivery of fill material via temporary on/off ramps connecting South 176th Street and Highway 509, construction of retaining walls, stormwater detention pond, timber noise wall, and shoulder widening along SR-509. Contract for 1.9 million cubic yards of
    TagsACC, Construction, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac Airport, SR509, Third RunwayFolderBox 10
  • 2001-09-10

    EXH AR024551: Letter Jay J. Manning (Marten Brown) to PCHB Presiding Officer — Appeal Water Quality Certification #1996-4-02325 & Stipulated Agreement Order of Dismissal

    In September 2001, attorneys for the Port of Seattle filed an appeal of Water Quality Certification #1996-4-02325, issued by the Washington State Department of Ecology for improvements at Seattle-Tacoma International Airport, including construction of a third runway. Simultaneously, the Port and the Department of Ecology filed a Stipulated Agreement and Agreed Order of Dismissal, resolving the Port's appeal by agreeing to amend the water quality certification. The Port requested that the Pollution Control Hearings Board accept the stipulation, dismiss the Port's appeal, and allow the separate Airport Communities Coalition appeal to proceed using the revised certification.
    TagsACC, Airport Communities Coalition, Ecology, Pollution Control Hearings Board, Port Of Seattle, Third Runway, Water QualityFolderBox 10
  • 2001-09-09

    EXH AR023915: Notice of Appeal — §401 CWA Certification & CZMA Concurrence (PCHB No. 01-133)

    In September 2001, the Port of Seattle filed a Notice of Appeal before Washington State's Pollution Control Hearings Board, challenging conditions attached to Ecology's §401 Clean Water Act certification for the construction of a third parallel runway at Seattle-Tacoma International Airport. The appeal document argues that Ecology's certification already fully protects Washington's water resources and that the project had undergone more than a decade of rigorous planning, environmental review, and judicial scrutiny before receiving approval. The filing was prepared by the law firm Foster Pepper & Shefelman and was shared among legal and agency representatives as a confidential, attorney-client privileged communication tied to ongoing settlement discussions.
    TagsACC, Clean Water Act, Ecology, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 10
  • 2001-09-08

    EXH 277: Email Chain – Proposed Language Condition E(1)(b) Third Runway Fill Criteria SPLP Testing Drainage Layer Cover

    In September 2001, representatives from the Port of Seattle and the Washington Attorney General's office exchanged emails negotiating the language of Condition E(1)(b), which governs fill material criteria for an embankment construction project. The proposed language would allow the Port to use a 'drainage layer cover' design and to demonstrate fill suitability through Synthetic Precipitation Leaching Procedure (SPLP) testing as an alternative to standard fill limitations. Under the proposal, SPLP test results would be submitted to the Washington Department of Ecology at least ten business days before any fill placement.
    TagsACC, Ecology, Fill Dirt, MTCA, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 09
  • 2001-09-07

    EXH 447: Draft Settlement Agreement — §401 Cert #1996-4-02325 Appeal, Sep 2001

    This September 2001 draft settlement agreement between the Washington State Department of Ecology and the Port of Seattle addresses conditions attached to a Clean Water Act §401 Certification for the construction of a third runway at Seattle-Tacoma International Airport. The agreement clarifies and revises specific environmental conditions — including wetland mitigation, stormwater management, and groundwater monitoring requirements — that would remain in effect during and after construction. The Port agreed to file a formal appeal solely to implement the settlement, after which the parties would jointly request the Pollution Control Hearings Board approve the agreed-upon modifications and dismiss the appeal.
    TagsACC, Clean Water Act, Ecology, PCHB, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 09
  • 2001-09-07

    EXH AR023900: Draft Settlement Agreement & SPLP Work Plan — Ecology §401 Cert #1996.4-02325, Third Runway

    This September 2001 draft settlement agreement between the Washington State Department of Ecology and the Port of Seattle addresses the Port's appeal of a Clean Water Act §401 Certification issued for the construction of a third runway at Seattle-Tacoma International Airport. The agreement clarifies and revises several certification conditions related to wetland mitigation, stormwater management, and groundwater monitoring. Both parties agreed to jointly request that the Pollution Control Hearings Board amend the certification accordingly, after which the Port's appeal would be dismissed.
    TagsACC, Clean Water Act, Ecology, PCHB, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 10
  • 2001-09-06

    EXH AR031263: Parametrix Transmittal of Wetland Hydrology Monitoring Data to Ecology for Port Of Seattle

    Transmittal form dated September 6, 2001 from Paul S. Fendt, P.E. of Parametrix (Kirkland, WA) to Ann Kenny at the Washington State Department of Ecology (Bellevue, WA 98008), transmitting wetland hydrology monitoring data for Port Of Seattle, Project Number 556-2912-001 01 03. Includes Lake Reba Area water level data tables for monitoring wells HC00-B151, HC00-B152,
    TagsACC, Auburn Wetland, Ecology, Environment, Pollution Control Hearings Board, Port Of Seattle, Water QualityFolderBox 12

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  • Port of Seattle Regular Commission Meeting September 22, 2026
    Add to CalendarMTuesday Sep 22: 12:00pm
    17801 International Blvd, Seattle, WA 98158
    2026 09 22 rm packet pdf

    Order of Business 10:30 a.m. 1. Call to Order 2. Executive Session – if necessary, pursuant to RCW 42.30.110 (executive sessions are not open to the public) 12:00 p.m. – Public Session Reconvene or Call to Order and Pledge of Allegiance 3. Approval of the Agenda 4. Special Orders of the Day 4a. Presentation of

    [...]
  • Highline Forum Agenda – September 23, 2026
    Add to CalendarMWednesday Sep 23, 2:30pm - 4:30pm
    City of Des Moines, Police Services Building,
    Highline forum agenda final 23sept2026 pdf

    Highline Forum Agenda Theme: Part 150 Update and PortJobs Overview 2:30pm – Convene Meeting/Introductions Port Co-Chair, Commissioner Mohamed 2:35pm – Public Comments Audience The meeting will be held in person and virtually. Those wishing to provide public comment may: 1) Deliver public comment via email; 2) Deliver public comment via Microsoft Teams; or 3) Deliver

    [...]

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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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