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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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  • Recommended Noise Remedy Boundary Map — Sea-Tac Airport Part 150 Study

    This map, prepared by Landrum & Brown for the Port of Seattle's 14 CFR Part 150 Study at Seattle-Tacoma International Airport, shows the Recommended Noise Remedy Boundary (blue dashed line) alongside the Existing Remedy Boundary (black dashed line) and the Future (2018) NEM/NCP 65 DNL Noise Exposure Contour. The future noise contour covers 7.3 square miles, encompassing an estimated 3,771 housing units, 9,712 residents, and 9 noise-sensitive facilities in communities including Des Moines, Burien, SeaTac, Normandy Park, and Tukwila.
    TagsLandrum & Brown, Map, Noise Boundary, Part 150, Sea-Tac AirportFolderPart 150
  • Noise Events mapped

    Visualizing flights over the 24 Permanent Noise Monitors The 2032 boundary is not finalized and subject to frequent change! Based on a presentation of the possible 2032 boundary by the Technical Review Committee of the current Part 150
    Tagsbeta, Map
  • Port Packages mapped

    Structures with Port of Seattle avigation easements Background When the Port of Seattle conducted their initial Part 150 Study in 1985, there were at least 11,000 structures inside the eligible boundary area. Since then, it has conducted four more, including the current one. Since then, the boundary, and the structures included within those boundaries, have
    CategoriesResources Tagsbeta, Map
  • FAA UAS Facility Map – Sea-Tac Airport Maximum Altitude Grid (July 2025)

    A GIS-style grid map overlaid on the south Seattle/Sea-Tac region showing noise exposure values (0, 50, 100, 200, 250, 300, 400 units) across cells covering communities including Burien, Tukwila, Renton, Normandy Park, and SeaTac. A dashed blue boundary line delineates what appears to be a noise impact or study area boundary around Seattle-Tacoma International Airport.
    TagsMapFolderFAA
  • 2025-02-26

    StART SIRRPP Update — Sound Mitigation Contractor Map by Property (September 2022) — Slide 7

    Slide 7 from a Sea-Tac Airport presentation titled 'Survey Overview and Results (cont.)' showing a geographic map of properties around Seattle-Tacoma International Airport color-coded by sound mitigation contractor (Other, Milgard, Alpine, CDI/Peerless/Devac). The map is dated September 2022 and includes a note directing homeowners to contact the Noise Programs office at 206-787-5393 to determine eligibility for sound mitigation programs.
    TagsMap, Noise Mitigation, Sea-Tac Airport, SIRRPP, Sound Insulation, StARTFolderSIRRPP 20250226
  • 2032 DNL ELU Nrb
    2025-01-01

    2032 DNL Noise Contours with Existing Land Use and Noise Remedy Boundary — Sea-Tac Airport

    This GIS map depicts the 2032 Day-Night Average Sound Level (DNL) noise contours (65, 70, and 75 dB) for Seattle-Tacoma International Airport (SEA), overlaid with generalized land use classifications and the current Noise Remedy Boundary. Sourced from the State of Washington (2024) and SEA SAMP, adapted by ESA in 2025, the map covers surrounding jurisdictions including Burien, SeaTac, Tukwila, Normandy Park, Des Moines, and unincorporated King County.
    TagsLand Use, Map, Noise Countour, Part 150, SAMP, Sea-Tac AirportFolder2024
  • 2024-11-12

    Environmental Remediation Liability Sites — Fishermen’s Terminal and Terminal 91 Property Boundaries Map (Page 131, November 12, 2024 RM Packet)

    This is Figure 2 of 3 from Item No. 8e Attachment 2, dated November 12, 2024, showing property boundaries (outlined in red) for environmental remediation liability sites at Fishermen's Terminal and Terminal 91 in Seattle's north maritime area. The map uses NAD 1983 StatePlane Washington North FIPS 4601 Feet coordinate system at a scale of 1 inch = 3,000 feet.
    TagsMap, Maritime, Port Of SeattleFolderMeetings
  • Seattle-Tacoma-SEA-Overview Map

    Aerial satellite map of Seattle-Tacoma International Airport (SEA/Sea-Tac) showing the Main Terminal, North Satellite, South Satellite (gates S1–S16), concourses labeled A, B, C, and D, the SeaTac Airport Link light rail station, and parking structures. The map highlights airside pedestrian connector routes in blue and orange overlaid on the satellite imagery.
    TagsMap, TerminalFolderTerminal
  • 2024-10-01

    SAMP Exhibit 3-3 Area of Potential Effects (APE) Water

    Exhibit 3-3 from the Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan (SAMP) Near-Term Projects, prepared by Landrum & Brown, dated October 2024 (Draft). The map depicts the Biological Resources ESA Study Area boundary (shown in blue dashed line) surrounding the airport property, extending to Puget Sound to the west and encompassing nearby waterways including Miller Creek and Walker Creek.
    Tagsenvironmental assessment, Landrum & Brown, Map, NEPA, SAMP, Sea-Tac AirportFolderChapter-3 (Affected Environment)
  • 2024-09-05

    HAWKZ Eight Arrival (RNAV) — Transition Routes, Seattle-Tacoma International Airport

    The HAWKZ Eight Arrival (HAWKZ8) is a standard terminal arrival route (STAR) used to guide aircraft into Seattle-Tacoma International Airport (SEA) from multiple directions, including transitions from waypoints such as Battle Ground, Klamath Falls, and Lakeview. The procedure requires RNAV 1 capability (DME/DME/IRU or GPS) and radar, and directs jet aircraft to descend via Mach number until intercepting 280 knots. Aircraft follow a series of waypoints and altitude restrictions, ultimately converging at the HAWKZ fix at 12,000 feet and 270 knots before continuing to the airport.
    TagsATC, FAA, Map, Sea-Tac AirportFolderFlight Tracks

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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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