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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.

TagSIRRPP(46)

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  • 2025-09-12

    Acoustical Testing Results for SIRRPP — September 2025

    In August 2025, acoustical engineering firm HMMH measured indoor noise levels at 31 homes near Seattle-Tacoma International Airport to assess eligibility for the airport's Sound Insulation Repair and Replacement Program. Testing found that only one of the 31 homes met the FAA's minimum threshold of 45 decibels interior Day-Night Average Sound Level required to qualify for full sound insulation treatment, while seven additional homes had at least one room exceeding that level. The study used FAA-approved methods, including a Boeing 737-800 aircraft noise spectrum, to calculate how much airport noise penetrates each habitable room with windows closed.
    TagsFAA, HMMH, Noise Remedy Program, Sea-Tac Airport, SIRRPP, Sound InsulationFolderSIRRPP HMMH Acoustic Testing
  • 2025-08-17

    Port of Seattle Commission meeting features Q2 financials

    Despite small bumps in non-aero, performance remains strong August 12, 2025 Agenda and full Packet Director Metruck had several reasons to smile, not the least of which being the airport’s continued record-breaking weekly operations report. Beyond that this last Commission meeting had two items of interest for us. SIRRPP In his opening remarks Director Metruck mentioned
    CategoriesNews Stories TagsAirport Development Fund, Port Of Seattle Commission, SIRRPP
  • 2025-08-08

    Acoustical Testing Results for SIRRPP — August 2025

    This August 2025 technical report by Harris Miller Miller & Hanson Inc. (HMMH) presents the results of interior sound insulation testing conducted at 28 homes near Seattle-Tacoma International Airport (SEA) in July 2025. Using FAA-approved measurement methods, acoustical engineers tested every habitable room in each home to determine how much aircraft noise penetrates indoors, with a threshold of 45 decibels (dB) required for a home to qualify for sound insulation assistance. Of the 28 structures tested, only two met the 45 dB qualification threshold, while nine others had at least one room exceeding that level but did not qualify under current FAA policy.
    TagsFAA, HMMH, Noise Mitigation, Sea-Tac Airport, SIRRPP, Sound InsulationFolderSIRRPP HMMH Acoustic Testing
  • 2025-07-16

    Burien City Council proposes cancelling SIRRPP?

    It costs no more to do it right. At the July 14, 2025 Burien City Council meeting Councilmember Linda Akey made this proposal. I would like to request the city council take two actions. One, authorize city staff to work on a letter to the Port of Seattle requesting an end to the Port Package
    CategoriesNews Stories TagsBurien Airport Committee, City of Burien, SIRRPP
  • 2025-07-16

    Acoustical Testing Results for SIRRPP — July 2025

    Harris Miller Miller & Hanson Inc. (HMMH) conducted sound insulation measurements at 30 homes near Seattle-Tacoma International Airport in June 2025 to determine whether interior noise levels meet the federal threshold for sound insulation assistance. Using FAA-approved testing methods, the study found that only 3 of the 30 homes had median interior Day-Night Average Sound Levels (DNL) at or above the qualifying 45 dB threshold, while an additional 3 homes had individual rooms exceeding that level. The results inform eligibility decisions under the SEA Repair and Replacement Program, which is governed by FAA Advisory Circular 150/5000-9B and the Airport Improvement Program Handbook.
    TagsFAA, HMMH, Noise Remedy Program, Sea-Tac Airport, SIRRPP, Sound InsulationFolderSIRRPP HMMH Acoustic Testing
  • 2025-06-19

    Burien Airport Committee Port Package proposal

    Airport group makes important recommendation to Burien City Council At their June 17 meeting the BAC voted 5-0 to make the following recommendation to their City Council. Port package program revamp (resolution) The City of Burien believes that, as currently structured, the Port of Seattle’s “Port Package” replacement program is a failure. Hundreds of homeowners,
    CategoriesNews Stories TagsBAC, SIRRPP, Sound Insulation
  • 2025-06-09

    Three votes. Three dollars.

    Funding Port Package updates made simple There’s always been confusion about Port Packages (sound insulation): Who pays for it? Who can pay for it? Who is eligible? Who should be eligible? There are a bunch of rules governing all of the above. They may seem complicated. Because they are. But the actual solutions are simple.
    CategoriesNews Stories TagsAIP, PFC, SFO, SIRRPP
  • StART SIRRPP Update_2.26.2025_15

    A presentation slide from a Sea-Tac Airport noise insulation program briefing explaining Expected Useful Life (EUL) of windows and doors for homes, based on four studies. The slide lists EUL ranges for aluminum window frames (15–20 yrs), vinyl window frames (20–30 yrs), glass/glazing (8–20 yrs), storm/window screens (10–15 yrs), storm doors (7–10 yrs), sliding doors (20 yrs), and entry door slabs (20–30 yrs), and notes that EULs do not account for acoustic performance.
    TagsSIRRPP, StARTFolderSIRRPP 20250226
  • 2025-02-26

    StART SIRRPP Update — Field Assessment Findings: Windows, Doors, and Ventilation — Slide 10 (February 26, 2025)

    A presentation slide summarizing field assessment findings for a noise insulation or mitigation program. Key findings include operational and appearance issues with windows (locking, condensation, seal failures, mold), absence of entry doors in port-sponsored installations, and ventilation via non-mechanical vents or fresh air intakes.
    TagsNoise Mitigation, SIRRPP, Sound Insulation, StART, WindowsFolderSIRRPP 20250226
  • 2025-02-26

    StART SIRRPP Update: Field Assessment and Acoustic Testing of 30 Homes — Slide 9 (February 26, 2025)

    A presentation slide states that third-party consultants conducted field assessment and acoustic testing concurrently at 30 homes over a two-week period beginning August 19, 2024. The 30 homes were selected to reflect the distribution of manufacturers by year for sound insulation packages installed between 1986 and 2014.
    TagsSea-Tac Airport, SIRRPP, Sound Insulation, StARTFolderSIRRPP 20250226

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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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