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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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  • Wsdot aviation fuel tax prr may 1, 2026 september 1, 2026 combined responsive records pdf
    2026-05-08

    Washington State Aviation Fuel Tax Compliance Information: Email Correspondence with FAA

    Email chain forwarded by Ann Richart (WSDOT Aviation Director) to Terri Palumbo on May 8, 2026, regarding Washington State aviation fuel tax collections and dispersants compliance. FAA Director of Office of Airport Compliance Michael Helvey (michael.helvey@faa.gov, (202) 267-9363) acknowledges receipt of compliance information submitted April 24, 2026 by Richart on behalf of Washington State Secretary
    TagsAviation Fuel, Department of Revenue, FAA, WSDOTFolderAviation
  • 2026-05-04

    Acoustical Testing Results for SIRRPP — May 2026

    Harris Miller Miller & Hanson Inc. (HMMH) conducted sound insulation testing at 30 homes near Seattle-Tacoma International Airport (SEA) in March 2026 to measure how much aircraft noise penetrates indoors. The study found that none of the 30 homes exceeded the FAA's 45-decibel interior noise threshold required to qualify for sound insulation treatments under current federal policy. However, nine homes had at least one individual room where interior noise levels surpassed 45 decibels, suggesting those specific rooms could benefit from upgraded windows or doors.
    TagsFAA, HMMH, Noise Remedy Program, Sea-Tac Airport, SIRRPP, Sound InsulationFolderSIRRPP HMMH Acoustic Testing
  • Ctc l ohare beam signing 73
    2026-04-30

    United Airlines cuts summer O’Hare flights at behest of FAA

    A United Airlines jet taxis at O’Hare International Airport in Chicago on April 23, 2026. (Antonio Perez/Chicago Tribune) By Talia Soglin | tasoglin@chicagotribune.com | Chicago Tribune PUBLISHED: April 30, 2026 at 4:53 PM CDT | UPDATED: April 30, 2026 at 5:18 PM CDT Getting your Trinity Audio player ready… United Airlines plans to cut more
    CategoriesFrom The Web TagsAir Traffic Control, Chicago Tribune, Commercial Aviation, FAA, O'Hare
  • 69efb3c57b303.hires
    2026-04-27

    Government watchdog urges FAA to address Boeing Max engine issue

    A Boeing 737 MAX 8 operated by Southwest Airlines flies over Ritzville, Washington, on July 16, 2021. (Travis Ness/The Seattle Times/TNS) By Lauren Rosenblatt Seattle Times The Federal Aviation Administration should do more to address safety risks from an engine feature on Boeing’s 737 Max that has twice filled planes with smoke, a government watchdog
    CategoriesFrom The Web TagsBoeing, Boeing 737 MAX, FAA, Seattle Times
  • 2026-04-24

    WSDOT Letter to FAA: Tax Collections, Offsets, and State Efforts to Resolve Airport Revenue Compliance Issue

    In an April 2026 letter to the FAA, the Washington State Department of Transportation provided detailed tax collection data and proposed spending offsets in response to federal questions about how Washington taxes aviation fuel. The letter covers Aircraft Fuel Tax revenues dating to 1983, local sales and use taxes on aircraft fuel tracked since 2023, and hazardous substance taxes, while explaining which taxes are grandfathered under federal rules. The state also outlined its methodology for calculating aviation-related budget offsets and committed to providing further updates within 60 days.
    TagsAviation Fuel, FAA, RCW, Washington State Legislature, WSDOTFolderAviation
  • Wsdot letter to FAA 2026 04 24 pdf
    2026-04-24

    WSDOT Letter to FAA: Tax Collections, Offsets, and State Efforts to Resolve Airport Revenue Compliance Issue

    In an April 2026 letter to the FAA, the Washington State Department of Transportation provided detailed tax collection data and proposed spending offsets in response to federal questions about how Washington taxes aviation fuel. The letter covers Aircraft Fuel Tax revenues dating to 1983, local sales and use taxes on aircraft fuel tracked since 2023, and hazardous substance taxes, while explaining which taxes are grandfathered under federal rules. The state also outlined its methodology for calculating aviation-related budget offsets and committed to providing further updates within 60 days.
    TagsAviation Fuel, FAA, RCW, Washington State Legislature, WSDOTFolderAviation
  • Dnl Average Sound Level

    Day-Night Average Sound Level Calculation

    This diagram explains the DNL (Day-Night Average Sound Level) metric used in airport noise policy, showing a bar chart of hourly LEQ sound levels (in dBA) over a 24-hour period labeled 'One Day of Events (DNL).' It highlights the 10-dB nighttime penalty applied to noise events occurring during nighttime hours, which is a standard FAA methodology for calculating community noise exposure.
    TagsDNL65, FAA, Noise Exposure UpdateFolderNoise
  • FAA SPL V2 HR Trim

    SEL Sound Exposure Level and Energy Metrics

    An educational diagram illustrating acoustic measurement concepts including Sound Exposure Level (SEL), Lmax, LEQ, and energy, plotted as sound level (dB) over time (seconds). The graphic shows how SEL compresses a noise event's total energy into a normalized 1-second value, with Lmax appearing approximately 10dB above the LEQ reference line.
    TagsFAA, Noise 101, Scientific MeasurementFolderNoise
  • 2026-04-21

    ZSE Radar Cheat Sheet

    The ZSE Radar Cheat Sheet is an air traffic control reference guide covering radar separation standards, identification procedures, and communication phraseology used in the Seattle Center (ZSE) airspace. It outlines required lateral and vertical separation distances between IFR and VFR aircraft in different airspace classes, as well as rules for vectoring, handoffs, approach clearances, and wake turbulence. The document serves as a quick-reference tool for controllers managing aircraft in and around the Seattle area, including procedures relevant to operations near Sea-Tac Airport.
    TagsAir Traffic Control, ATC, FAA, TRACONFolderATC
  • Trump Lee Zeldin Epa Deregulation of Greenhouse Gases Announcement.apnews

    Trump and Lee Zeldin EPA Greenhouse Gas Deregulation Announcement

    A speaker addresses the room from a podium bearing the Seal of the President of the United States, while a second man in a navy suit and pink tie stands to the right holding a green official folder. The setting appears to be the Roosevelt Room or a similar formal White House venue, with an American flag and painted portrait visible in the background.
    TagsEnvironmental Protection Agency, EPA, Executive Orders, FAA, Greenhouse gasesFolderEPA

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Upcoming Events

  • Part 150 NCP Workshop — Burien
    Add to CalendarMSaturday Oct 17: 10:00am

    Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.

    [...]
  • Part 150 NCP Workshop — SeaTac
    Add to CalendarMMonday Oct 19: 6:00pm

    Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.

    [...]
  • Part 150 NCP Workshop — Des Moines
    Add to CalendarMTuesday Oct 20: 6:00pm

    Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.

    [...]

[See all...]


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.
read more...

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.
continue...

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