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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.

TagMaster Plan(51)

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  • 2001-11-01

    EXH AR17604: Figure 1.3-1 — Master Plan Update Improvement Projects at STIA

    Port of Seattle Natural Resource Mitigation Plan figure (AR017604, Exhibit 46, dated 12-20-01) showing Master Plan Update Improvement Projects at Seattle-Tacoma International Airport (STIA). Map depicts Third Runway construction area, Runway Safety Areas (RSAs), MSE retaining walls used to avoid and minimize wetland impacts, relocated section of Miller Creek, Miller Creek Detention Facility, Lora Lake,
    TagsACC, Environmental Impact Statement, Master Plan, Miller Creek, Pollution Control Hearings Board, Port Of Seattle, Third RunwayFolderBox 08
  • 2001-11-01

    EXH AR029275: Natural Resource Mitigation Plan, Master Plan Update Improvements, Seattle-Tacoma International Airport

    Final Natural Resource Mitigation Plan (NRMP) prepared by Parametrix, Inc. for the Port Of Seattle, covering Master Plan Update Improvements at Seattle-Tacoma International Airport (Sea-Tac Airport). Document number 556-2912-001 (03), dated November 2001. Administrative Record document AR 029275–AR 029277.
    TagsACC, Environmental Impact Statement, Master Plan, NEPA, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac AirportFolderBox 11
  • 2001-11-01

    EXH AR052286: Miller Creek Riparian Corridor and Instream Enhancement Project — Wetland A17 Restoration, STIA Master Plan Update Improvements

    Report prepared by Parametrix, Inc. for Port Of Seattle regarding the Miller Creek Riparian Corridor and Instream Enhancement Project and Wetland A17 Restoration, part of the Seattle-Tacoma International Airport Master Plan Update Improvements. Document AR 052286 covers wetland mitigation design, Army Corps of Engineers requirements, buffer averaging, hydrology, soils, vegetation, grading, landscape plan, performance standards,
    TagsACC, Army Corp of Engineers, Environmental Impact Statement, Master Plan, Miller Creek, Pollution Control Hearings Board, Port Of SeattleFolderBox 22
  • 2001-07-12

    EXH AR050671: Transmittal Form — STIA Natural Resource Mitigation Plan Tables and Wetland Photographs, Parametrix to Ecology

    Transmittal form dated July 12, 2001 from Jim Kelley at Parametrix, Inc. (Kirkland, WA) to Ann Kenny at Washington Department of Ecology NW Regional Office (Bellevue, WA), project number 556-2912-001 (03), transmitting materials for the Sea-Tac International Airport Master Plan Update Improvements. Materials include three copies of STIA Wetland Photographs and Maps report, and four
    TagsACC, Auburn Wetland, Ecology, Master Plan, Pollution Control Hearings Board, Sea-Tac AirportFolderBox 21
  • 2001-05-01

    EXH AR050379: Wetland Photographs and Maps — Master Plan Update Improvements, Seattle-Tacoma International Airport

    Wetland photographs and maps prepared by Parametrix, Inc. for the Port Of Seattle, documenting wetlands and other Waters of the U.S. in the Miller Creek Basin near Seattle-Tacoma International Airport (STIA) as part of the Master Plan Update Improvements. AR 050379–050381. Includes photo point map showing delineated wetlands verified and not verified by ACOE (Army
    TagsACC, Map, Master Plan, Miller Creek, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac AirportFolderBox 21
  • 2001-04-05

    EXH AR028405: Port Of Seattle Master Plan Update — Wetland Functional Analysis, Wetlands A6-A7-A8, A12-A13-A18

    Parametrix, Inc. wetland functional analysis forms prepared for the Port Of Seattle Master Plan Update, documenting wetland attributes for wetlands A6-A7-A8 and A12-A13-A18, dated 4/5/01, investigator W.K./Mil. Records presence/absence of wetland attributes including vegetation classes (Cowardin), forested wetland coverage (80%, 30%), impervious surface (>60% urban/runway), buffer conditions, seasonal ponding, emergent vegetation, seeps and springs, flooding
    TagsACC, Environment, Master Plan, Pollution Control Hearings Board, Port Of Seattle, SAMPFolderBox 10
  • 2000-12-01

    EXH AR009646: Natural Resource Mitigation Plan — Master Plan Update Improvements, Seattle-Tacoma International Airport

    Final Natural Resource Mitigation Plan prepared by Parametrix, Inc. for Port Of Seattle covering Master Plan Update Improvements at Seattle-Tacoma International Airport, dated December 2000. Filed as part of PCHB No. 01-133, Port of Seattle’s memo opposing ACC’s motion for stay, Volume 3 of 3, received by Environmental Hearings Office on October 1, 2001. Includes
    TagsACC, Environmental Impact Statement, Master Plan, PCHB, Pollution Control Hearings Board, Port Of SeattleFolderBox 05
  • 2000-12-01

    EXH AR048122: Wetland Functional Assessment and Impact Analysis, Master Plan Update Improvements, Sea-Tac Airport

    Wetland Functional Assessment and Impact Analysis prepared by Parametrix, Inc. for Port Of Seattle, Seattle-Tacoma International Airport, December 2000 (project number 556-2912-001). AR 048122. Covers wetland delineation, functional assessment, and impact analysis for Master Plan Update Improvements including Runway Safety Areas, relocation of South 154th Street, new Third Runway, borrow areas, and South Aviation Support
    TagsACC, Master Plan, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac Airport, Third Runway, Water QualityFolderBox 20
  • 2000-12-01

    EXH AR048591: Natural Resource Mitigation Plan, Master Plan Update Improvements, STIA

    Final Natural Resource Mitigation Plan prepared by Parametrix, Inc. for Port Of Seattle, Seattle-Tacoma International Airport Master Plan Update Improvements, December 2000 (AR 048591, project 556-2912-001). Covers wetland delineation and descriptions, Miller Creek Basin, Des Moines Creek Basin, Gilliam Creek, South Aviation Support Area (SASA), runway safety area extensions, South 154th Street relocation, on-site borrow
    TagsACC, Environmental Impact Statement, Master Plan, Miller Creek, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac AirportFolderBox 20
  • 2000-12-01

    EXH AR049528: Port Of Seattle Seattle-Tacoma Airport Master Plan Update Low Streamflow Analysis

    Low Streamflow Analysis prepared by Earth Tech, Inc. for Port Of Seattle as part of the Seattle-Tacoma Airport Master Plan Update, dated December 2000. Report covers existing streamflow conditions, watershed modeling of current and proposed conditions, hydrologic behavior of runway fill, non-hydrologic flows, secondary recharge effects, reserved stormwater release, and summary of low streamflow effects
    TagsACC, Master Plan, Miller Creek, Pollution Control Hearings Board, Port Of Seattle, Sea-Tac Airport, StormwaterFolderBox 21

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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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