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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.

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  • 2025-08-25

    South Seattle College program could help Sea-Tac fill workforce gap

    Diesel Transportation and Heavy Equipment Technology instructor Mark Murphy, right, teaches a class on electrical theory and how it relates to diesel engines at South Seattle College in July. (Ken Lambert / The Seattle Times) By Ryan Nguyen Seattle Times news producer Education Lab is a Seattle Times project that spotlights promising approaches to persistent challenges
    CategoriesFrom The Web TagsSea-Tac Airport, Seattle Times
  • 2025-08-22

    SEA Offers Travel Tips for Final Weekend of Record Setting Summer

    Checkpoint changes, north end ticketing options, plus new treats to enjoy. Plan ahead August 22, 2025 A record-setting summer is coming down to its final weekend as the Labor Day holiday approaches at Seattle-Tacoma International Airport (SEA). Since June, multiple records have been set for overall and international passenger levels while travelers who haven’t been
    CategoriesFrom The Web, News Stories TagsPort Of Seattle, Press Release, Sea-Tac Airport
  • 2025-08-21

    SEPA Determination of Non-Significance: Sea-Tac Airport Flight Corridor Management Program (POS SEPA No. 2025-05)

    The Port of Seattle has issued a Determination of Non-Significance (DNS) under Washington's State Environmental Policy Act (SEPA) for its Flight Corridor Management Program at Seattle-Tacoma International Airport. The program, conducted approximately every five years, identifies and removes trees and other obstructions near the airport's runways that could interfere with flight paths, while also requiring ongoing ecological monitoring and tree replacement. A 15-day public comment period ran through September 11, 2025, after which the Port planned to formally adopt the determination, with any appeals required to be filed in King County Superior Court within 21 days of formal adoption.
    TagsFlight Corridor Safety Program, Port Of Seattle, Sea-Tac Airport, SEPA, TreesFolderFlight Corridor Safety Program
  • 2025-08-20

    Programmatic Environmental Checklist: Seattle-Tacoma International Airport Flight Corridor Management Program

    The Port of Seattle's Flight Corridor Management Program is an ongoing effort to identify and remove trees near Seattle-Tacoma International Airport (SEA) that obstruct the flight paths of its three parallel runways, as required by FAA regulations. Approximately every five years, the Port surveys the area, removes obstructing trees, and replants replacements, with each cycle documented in publicly available Implementation Plans and Regulatory Memoranda. This 2025 programmatic environmental review under Washington's State Environmental Policy Act (SEPA) covers the long-term program rather than individual removal projects.
    TagsFlight Corridor Safety Program, Port Of Seattle, Sea-Tac Airport, SEPA, TreesFolderFlight Corridor Safety Program
  • 2025-08-14

    United Airlines To Reportedly Move Concourses In Seattle & Open New Lounge

    United Airlines is making some big changes at Seattle-Tacoma International Airport (SEA). The airline is relocating its entire operation to a new concourse, meaning a new lounge will be on the way as well. The United gates will be relocated from Concourse A to Concourse B at SeaTac, and a new United Club is expected to be built
    CategoriesFrom The Web, News Stories TagsSea-Tac Airport, Simple Flying, Terminal, United Airlines
  • Port Properties and Trees GIS

    A map centered on Seattle-Tacoma International Airport (Sea-Tac) showing clusters of red circles and green dots overlaid on the airport and surrounding communities including Burien, SeaTac, Tukwila, and Normandy Park. The blue outlined polygon appears to delineate a municipal or study boundary, and the red/green markers likely represent noise complaint locations or flight track data points used in airport noise policy analysis.
    TagsMap, Port Of Seattle, Sea-Tac Airport, TreesFolderProperties
  • 2025-08-12

    Sea-Tac Airport 2025 Capital Expenditures Financial Summary — RM Packet Page 252

    A financial summary table from what appears to be a Seattle-Tacoma International Airport board or budget report (page 252 of 292) detailing 2025 capital expenditures, showing projects including C Concourse Expansion, SEA Gateway, Post IAF Airline Realignment, and others, with total spending of approximately $806.9M forecast against a $816.3M budget. Footnotes explain variances for each major project.
    TagsAirport Expansion, Budget, capital improvements, Port Of Seattle, Sea-Tac AirportFolder2025-Q2
  • 2025-08-12

    Sea-Tac Airport ADF Sources and Uses Summary — 2025 Forecast vs. Budget (Page 251)

    This slide (page 251 of 292) presents the Airport Development Fund (ADF) Sources and Uses summary for Seattle-Tacoma International Airport, comparing 2025 forecast against 2025 budget. Key figures include a 1/1/2025 ADF balance of $739,774K (forecast) vs. $703,614K (budget), total sources of $957,838K, total uses of $(867,612)K, and a projected 12/31/2025 ADF balance of $830,000K, meeting the 18-month operating expense target.
    TagsAirport Development Fund, Budget, Port Of Seattle, Sea-Tac AirportFolder2025-Q2
  • 2025-08-12

    Sea-Tac Airport Development Fund Balance — Financial Presentation (Page 214)

    A bar chart from a Sea-Tac Airport financial presentation (page 214 of 292) showing the Airport Development Fund Balance with a beginning balance of $739,774 thousand, an ending balance forecast of $830,000 thousand, and a budget of $829,833 thousand. The slide notes the ending balance forecast of $830M meets the target of 18 months of O&M in 2025.
    TagsAirport Development Fund, Budget, Port Of Seattle, Sea-Tac AirportFolder2025-Q2
  • 2025-08-12

    Non-Aero Detail: AVBP Revenue Trends — Port Of Seattle Regional Meeting Packet (Page 250)

    A presentation slide titled 'Non-Aero Detail: AVBP Revenue Trends' (page 250 of 292) showing Airport Business & Properties segment revenues from 2019 through 2025 forecast/budget. Two charts display revenue trends by segment (Flight Kitchens, Other Airport Properties, CLEAR, Clubs & Lounges) and total airport properties revenues, noting that combined revenues surpassed 2019 levels in 2023 and that growth will continue in 2025 with the addition of the International Place (STOC) property.
    TagsAirport Highlights, Port Of Seattle, Presentation, Sea-Tac AirportFolder2025-Q2

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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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