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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.

TagThird Runway(1067)

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  • 2001-12-26

    EXH 295: ACC Interrogatories Nos. 1-19 and Requests for Production Nos. 1-6; Objections and Responses

    The Port of Seattle submitted formal objections and responses to interrogatories filed by the Airport Communities Coalition (ACC) before Washington State's Pollution Control Hearings Board, related to a legal dispute over the Port's Third Runway Project. The case centered on the Department of Ecology's water quality certification issued under federal Clean Water Act Section 401. The document outlines the legal procedures governing the exchange of information between the parties during the hearing process.
    TagsACC, Airport Communities Coalition, Ecology, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 09
  • 2001-12-26

    EXH 407: ACC Interrogatories Nos. 1-19 and Requests for Production Nos. 1-6; Objections and Responses

    This document contains the Port of Seattle's formal objections and responses to interrogatories and requests for production filed by the Airport Communities Coalition (ACC) before Washington State's Pollution Control Hearings Board (Case No. 01-160). The Port identifies over a dozen expert witnesses it intends to call, including specialists in geotechnical engineering, toxicology, hydrology, and groundwater science from firms such as Parametrix, Inc., Hart Crowser, and ENSR Toxicology. The case centers on environmental and pollution concerns related to Sea-Tac Airport operations.
    TagsACC, PCHB, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 09
  • 2001-12-22

    PCHB Doc 5791: ACC’s Motion for Partial Summary Judgment Regarding Absence of Water Right

    ACC (Airport Communities Coalition) motion for partial summary judgment filed in PCHB No. 01-160 against State of Washington Department of Ecology and Port of Seattle, arguing the Section 401 Certification should be invalidated because the Port lacks a water right to permanently mitigate low-flow impacts of the Sea-Tac Airport third runway project. Cites PCHB December
    TagsACC, Army Corp of Engineers, PCHB, Pollution Control Hearings Board, Third Runway, Water QualityFolderBox 03
  • 2001-12-20

    EXH AR026603: Letter USFWS to James M. Lynch — Monitoring Plan Embankment Fill Seepage, Master Plan Update ESA Consultation (1-3-00-F-1420)

    This December 2001 letter from the U.S. Fish and Wildlife Service's Western Washington office provides detailed comments on a Monitoring Plan for Embankment Fill Seepage related to a Sea-Tac Airport Master Plan Update, reviewed under the Endangered Species Act. The agency requested key revisions, including monitoring both seepage quality and quantity, beginning monitoring when seepage first occurs rather than after embankment completion, and ensuring groundwater wells are considered as a monitoring pathway. The letter also clarified that any exceedances of water quality criteria must be reported promptly, and that the Federal Aviation Administration—not the Port—would be responsible for reinitiating formal consultation.
    TagsACC, ESA, FAA, Master Plan, PCHB, Pollution Control Hearings Board, Sea-Tac Airport, Third Runway, Water QualityFolderBox 10
  • 2001-12-20

    EXH AR053223: Effect of Shear Modulus on Deformations and Reinforcing Stresses of MSE Walls — Third Runway Project

    Memorandum dated December 20, 2001 from Michael Bailey, P.E. and Reda A. Mikhail, P.E. of Hart Crowser, Inc. to Jim Thomson, P.E. of HNTB Corporation regarding AR053223, project 4798-40. Analyzes sensitivity of MSE (Mechanically Stabilized Earth) wall design to variations in soil shear modulus under dynamic/seismic loading for the Third Runway Project at Sea-Tac Airport,
    TagsACC, Mechanically Stabilized Earth, Pollution Control Hearings Board, SAMP, Sea-Tac Airport, Third RunwayFolderBox 22
  • 2001-12-19

    Exhibit 2057: Port Of Seattle Natural Resources Mitigation Plan — 401 Water Quality Certification Conditions Matrix

    Email from Jim Kelley (Parametrix, Inc.) to Ann Kenny dated December 19, 2001, transmitting a matrix document summarizing changes made to the Port Of Seattle Natural Resources Mitigation Plan (NRMP) to comply with Water Quality Certification #1996-4-02325 (401 Certification) issued September 21, 2001. The attached matrix details resolutions for required mitigation conditions including: monitoring duration
    TagsACC, Ecology, NEPA, Pollution Control Hearings Board, Port Of Seattle, Third Runway, Water QualityFolderBox 12
  • 2001-12-18

    Exhibit 141: Order Granting Motion to Stay the Effectiveness of Section 401 Certification — ACC v. Ecology and Port Of Seattle (PCHB 01-160)

    Pollution Control Hearings Board (PCHB) Order Granting Motion to Stay the Effectiveness of Section 401 Certification No. 1996-4-02325 (amended-1), issued by Washington State Department of Ecology to the Port Of Seattle on September 21, 2001, in case PCHB 01-160. Airport Communities Coalition (ACC) filed the motion; Board members Kaleen Cottingham and Robert V. Jensen heard
    TagsACC, Clean Water Act, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 08
  • 2001-12-18

    Exhibit 228: NHC Letter to U.S. Army Corps of Engineers Identifying Port Of Seattle Document Inconsistencies in SMP and NRMP for Sea-Tac Airport Master Plan Update

    A December 2001 technical letter from Northwest Hydraulic Consultants, written on behalf of the Airport Communities Coalition, identifies inconsistencies in the Port of Seattle's stormwater management plans for Sea-Tac Airport expansion. The letter argues that the Port's hydrologic modeling failed to account for the planned commercial redevelopment of borrow pit areas by 2006, and that the Natural Resource Mitigation Plan reverted to an outdated stormwater approach relying on regional detention facilities to be built by others. These gaps, the consultants contend, prevent a full assessment of the airport Master Plan Update's environmental impacts.
    TagsACC, Airport Communities Coalition, Army Corp of Engineers, Pollution Control Hearings Board, Port Of Seattle, Stormwater, Third RunwayFolderBox 08
  • 2001-12-14

    EXH AR028396: Agreement Between Port Of Seattle and City Of Sea-Tac for Development of Certain Port-Owned Properties

    Agreement effective December 14, 2001 between Port Of Seattle and City of SeaTac for development of Port-owned properties known as Borrow Area #3 (south of South 200th Street, west of 18th Avenue South) and Borrow Area #4 (north of South 200th Street, west and south of 18th Avenue South and South 196th Street). Resolves outstanding
    TagsACC, City Of SeaTac, Interlocal Agreement, Land Use, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 10
  • 2001-12-13

    EXH AR026623: Ecology Justification Amendment No. 3 Contract C0100121 Shannon & Wilson

    In December 2001, Washington State Department of Ecology drafted a justification to amend its contract with engineering firm Shannon and Wilson, Inc., adding $57,412 to support ongoing review of the Port of Seattle's Natural Resource Mitigation Plan related to the proposed Third Runway project at Sea-Tac Airport. The amendment was needed to cover expert witness testimony before the Pollution Control Hearings Board following an appeal of Ecology's 401 Water Quality Certification, as well as field monitoring of wetland construction and review of revised mitigation documents. Funding for the contract was provided through an interagency agreement with the Port of Seattle and was not approved by the Port Commission until December 11, 2001.
    TagsACC, Airport Communities Coalition, Ecology, Pollution Control Hearings Board, Port Of Seattle, Third Runway, Water QualityFolderBox 10

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Upcoming Events

  • Stay Grounded Event: Night trains, not night planes!
    Add to CalendarMSunday Sep 13: 12:00am
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    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

    [...]

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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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