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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.

TagPuget Sound(125)

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  • 1999-12-02

    EXH AR026984: Ground Water Flow Map – C1 Aquifer, Ground Water Study, Seattle-Tacoma International Airport

    Ground Water Flow Map for the C1 Aquifer prepared by Associated Earth Sciences, Inc. (project no. 8V07019, figure 7) as part of a Ground Water Study at Seattle-Tacoma International Airport, dated 12/02/99. The map covers the Sea-Tac Airport area including Normandy Park, City of SeaTac, Tukwila, Des Moines, and surrounding Puget Sound shorelines. Shows ground
    TagsACC, Ecology, Map, Pollution Control Hearings Board, Puget Sound, Sea-Tac AirportFolderBox 10
  • 1999-05-01

    Miller Creek Basin: Historic Puget Sound Salmon Stream — Basin Map with Proposed Third Runway Site

    This 1999 document by C. Gower describes the Miller Creek Basin, a historic Puget Sound salmon stream located in the cities of SeaTac, Burien, and Normandy Park in King County, Washington (Water Resource Inventory Area No. 9). The basin includes several lakes — Arbor, Tub, Reba, Lora, and Burien — and drains into Puget Sound via Miller Creek and Walker Creek. The map highlights the proposed Third Runway site at Sea-Tac Airport within the watershed, raising concerns about potential environmental impacts to this salmon-bearing stream system.
    TagsMap, Miller Creek, Puget Sound, Sea-Tac Airport, Third RunwayFolderThird Runway
  • 1999-04-01

    EXH AR026946: Assessment of Spawning and Habitat in Three Puget Sound Streams, Washington

    BioAnalysts, Inc. report by T.W. Hillman, J.R. Stevenson, and D.J. Snyder prepared for Airport Communities Coalition (ACC), Des Moines, WA. Surveys of habitat composition and condition, redd (nest) abundance and distribution, and spawning population characteristics of coho (Oncorhynchus kisutch), chum (O. keta), and cutthroat trout (O. clarki) in Miller Creek, Walker Creek, and Des Moines
    TagsACC, Des Moines Creek, Miller Creek, Pollution Control Hearings Board, Puget Sound, SalmonFolderBox 10
  • 1998-06-11

    Documents catalogued as received in 1991

    This catalog log lists three transportation planning documents received in 1991 and accessioned into an archive between 2001 and 2003. The documents cover Puget Sound regional transportation alternatives (the Flight Plan Project), air pollutant contributions at Seattle-Tacoma International Airport, and a feasibility study for preserving the Stampede Pass Rail Corridor. Together they represent early 1990s regional planning efforts related to air quality, rail, and transportation policy in the greater Seattle-Tacoma area.
    TagsHistory, Puget Sound, Railroads, RCAA, Sea-Tac AirportFolderRCAA
  • 1997-11-18

    EXH AR017515: Washington Administrative Code Chapter 173-201A — Water Quality Standards for Surface Waters of the State of Washington

    WAC Chapter 173-201A establishes water quality standards for surface waters of the State of Washington under RCW 90.48, including definitions for AKART, background conditions, best management practices (BMP), fecal coliform, mixing zones, pH, turbidity, wetlands, nonpoint source pollution, and trophic state. Covers general water use and criteria classes (Class AA extraordinary), dissolved oxygen standards, fecal
    TagsACC, Ecology, Pollution Control Hearings Board, Puget Sound, WAC, Washington Administrative Code, Water QualityFolderBox 08
  • 1996-06-20

    Summary of the Regional Council’s decision process relating to amending the Metropolitan Transportation Plan to include a third runway at Sea-Tac International Airport with additional noise reduction measures

    This 1996 Puget Sound Regional Council document summarizes the multi-year planning process behind the decision to add a third runway at Seattle-Tacoma International Airport. It traces efforts dating back to the 1988 Regional Airport System Plan through environmental reviews, expert panel evaluations, and feasibility studies, concluding that no viable alternative sites or demand-management strategies could eliminate the need for the new runway. The approval was conditioned on additional noise reduction measures to address impacts on surrounding communities.
    TagsMetroplitan Transportation Plan, PSRC, Puget Sound, Third RunwayFolderPuget Sound Regional Council
  • 1994-05-18

    1994 Puget Sound water quality management plan

    The 1994 Puget Sound Water Quality Management Plan is a regional environmental policy document adopted on May 18, 1994 by the Puget Sound Water Quality Authority, based in Olympia, Washington. It outlines strategies and guidelines for managing and protecting water quality across the Puget Sound region. Note: This document pertains to water quality management and does not contain content related to Sea-Tac Airport noise policy.
    TagsEnvironment, King County, Puget Sound, State of Washington, Water QualityFolderEnvironment
  • 1993-01-28

    RCAA letter to Transportation Policy and Executive Board

    A January 28, 1993 letter from James T. Murphy of the Regional Commission on Airport Affairs (RCAA) to the Transportation Policy and Executive Board, presenting independent consultant research on air capacity options for the Puget Sound region. The letter notes that RCAA had delivered three volumes of material over three weeks, with a final compilation to follow, aimed at helping the Board make informed decisions about managing airport capacity. The RCAA, backed by dozens of community organizations and cities including Burien, Des Moines, Normandy Park, and Tukwila, framed its work as an alternative voice on Sea-Tac Airport expansion and noise policy.
    CategoriesCorrespondence Tagscommunity engagement, Puget Sound, RCAA, Regional Commission On Airport AffairsFolderRCAA
  • 1991-08-01

    Puget Sound Air Transportation Committee News: Public Shapes Air Capacity Alternatives

    In 1991, the Puget Sound Air Transportation Committee (PSATC) gathered public input on long-term air capacity solutions for the Seattle region, with over 1,200 people participating through meetings and written comments. Key public concerns included opposition to expanding Sea-Tac Airport, worries about noise and air pollution impacts on nearby residents, and support for high-speed rail alternatives. The committee identified several potentially feasible options—including multiple airport systems and a new international airport to replace Sea-Tac—while ruling out others, such as a distant remote airport and high-speed rail alone, as insufficient stand-alone solutions.
    TagsAir Transportation Commission, Flight Plan Project, Port Of Seattle, Puget Sound, Puget Sound Council of GovernmentsFolderPSCAA
  • 1991-05-01

    EXH AR019107: Field Assessment Mitigation Replacement Ratios Puget Sound

    This 1991 report by Sheldon and Associates, prepared for the Washington Department of Ecology, assesses wetland mitigation replacement ratios in the Puget Sound region. It evaluates compensation sites where wetlands were restored or created to offset permitted wetland losses, examining how well those sites functioned as replacements. The report provides findings, conclusions, and recommendations on compensation plan design, monitoring, and appropriate replacement ratios for regulatory guidance.
    TagsACC, Ecology, PCHB, Pollution Control Hearings Board, Puget Sound, Third RunwayFolderBox 08

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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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