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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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  • 2025-10-14

    Port Of Seattle regular commission meeting agenda, October 14, 2025

    This document is the agenda for the Port of Seattle Regular Commission Meeting held on October 14, 2025, covering routine administrative and business items such as lease agreements, labor contracts, and environmental remediation funding. It does not contain specific Sea-Tac Airport noise policy content, though it includes an item authorizing a ten-year cargo building lease with Amazon.com Services at Seattle-Tacoma International Airport. The meeting was held both in person at Port headquarters and virtually via Microsoft Teams.
    TagsAmazon, Fred Felleman, Port Of Seattle, Port Of Seattle Commission, Sea-Tac AirportFolderMeetings
  • 2025-10-14

    Sustainable Airport Master Plan Near-Term Projects Update

    Port of Seattle presentation updating on the FAA’s completion of NEPA Environmental Assessment for 31 proposed SAMP projects, finding no significant environmental impact. Covers regional growth driving air travel demand, project details, and next steps including Port-led environmental review and public engagement.
    TagsFAA, NEPA, Port Of Seattle, SAMP, Sea-Tac Airport, Sustainable Airport Master PlanFolderSAMP
  • 2025-10-14

    Sea-Tac 2026 Budget CPE Comparison Across Large-Hub Airports

    Slide 54 (page 56 of 95) from a Seattle-Tacoma International Airport (SEA) presentation compares 2026 forecast Cost per Enplanement (CPE) across five large-hub airports: DEN ($17.05), LAX ($37.60), ORD ($29.08), SEA ($21.10), and SFO ($29.03). Sources are cited as 2026 Budget documents or Preliminary Official Statements on bond issuance.
    TagsAirline Industry, Budget, Forecast, Sea-Tac AirportFolderStatistics
  • Sea-Tac Airport Budget Summary and Key Indicators, 2023–2026

    A financial summary slide presenting Seattle-Tacoma International Airport's budget data from 2023 actuals through the 2026 proposed budget, showing operating revenues projected to reach $982,884 thousand and capital expenditures of $835,887 thousand in 2026. Key indicators include Cost Per Enplanement (CPE) rising to $21.10, enplaned passengers of 27,031 thousand, and a 16.5% increase in capital expenditures from the 2025 approved budget.
    TagsBudget, Port Of Seattle, Sea-Tac AirportFolderFinance
  • 2025-10-13

    Port Commission briefing SAMP: SEPA Includes Additional Analyses

    A presentation slide titled 'SEPA Includes Additional Analyses' lists environmental review topics covered under the State Environmental Policy Act (SEPA), including Earth, Air, Water, Plants and Animals, Energy and Natural Resources, Environmental Health, Land and Shoreline Use, Transportation, Public Services and Utilities, Climate, Environmental Justice, and Cumulative Impacts. A footnote notes that Climate, Environmental Justice, and Cumulative Impacts were removed from the NEPA Final EA, highlighting differences between state and federal environmental review processes relevant to Sea-Tac Airport proceedings.
    TagsEnvironmental Review, Port Of Seattle Commission, SAMP, Sea-Tac Airport, SEPAFolderCommission
  • 2025-10-10

    FAA Grant Compliance Review: Seattle-Tacoma International Airport Report

    The FAA conducted a compliance review of Seattle-Tacoma International Airport (SEA), managed by the Port of Seattle, to assess whether airport revenues were being used in accordance with federal law and FAA policies. The review found several violations, including the use of airport funds for familiarization tours promoting tourism and existing airline routes, which are prohibited forms of general economic development. The FAA ordered reimbursement of over $354,000 in improper marketing expenses and required the Port to immediately stop using airport revenue for non-compliant marketing activities.
    TagsAirport Improvement Program, Audit, FAA, Port Of Seattle, Sea-Tac AirportFolderFAA
  • 2025-10-10

    Acoustical Testing Results for SIRRPP — October 2025

    In September 2025, acoustical engineers tested 29 homes near Seattle-Tacoma International Airport to measure how much aircraft noise penetrates indoors. The study found that none of the homes exceeded the 45-decibel interior noise threshold required to qualify for federally funded soundproofing treatments, though 10 homes had at least one room above that level. The findings are part of SEA's Repair and Replacement Program, which evaluates whether previously soundproofed homes need updated windows and doors.
    TagsHMMH, Noise Remedy Program, Part 150, Sea-Tac Airport, SIRRPP, Sound InsulationFolderSIRRPP HMMH Acoustic Testing
  • 2025-10-01

    NEM_Wkshp_Boards_8

    A presentation introducing the Part 150 Study process for Seattle-Tacoma International Airport. The document explains the federal regulatory framework for preparing Noise Exposure Maps and Noise Compatibility Programs, outlines the phases of the study process, and provides historical context of previous Part 150 studies conducted at SEA from 1985 to 2014.
    Tagscommunity engagement, Noise, Part 150, Port Of Seattle, Sea-Tac AirportFolder2024
  • 2025-09-26

    Appendix O: Agency & Public Engagement (with responses)

    Appendix O of the FAA NEPA Draft Environmental Assessment (EA) for the Sustainable Airport Master Plan (SAMP) at Sea-Tac Airport. Documents agency and public engagement activities during the EA process, including coordination under NEPA (42 U.S.C. 4321 et seq.), FAA Orders 1050.1F and 5050.4B, and CEQ regulations (40 CFR parts 1500-1508). Notes regulatory changes including
    Tagscommunity engagement, FAA, NEPA, SAMP, Sea-Tac AirportFolderAppendices
  • 2025-09-23

    Port Of Seattle regular commission meeting agenda, September 23, 2025

    The Port of Seattle held a Regular Commission Meeting on September 23, 2025, covering routine business including approval of meeting minutes, claims totaling approximately $141 million, and personnel matters. A key action item was authorization for the Executive Director to renew a Bonneville Power Administration contract to supply electrical power to Seattle-Tacoma International Airport from 2028 through 2044, estimated at $150 million. The meeting also included a briefing on the 2026 preliminary budget rollup for Port-wide central services.
    TagsBudget, Labor, Port Of Seattle, Port Of Seattle Commission, Sea-Tac AirportFolderMeetings

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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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