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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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  • 2025-10-28

    O’Hare Airport Snow Storage Expansion Diagram (SAMP Comparison Exhibit)

    ★
    Aerial satellite map of O'Hare International Airport showing two annotated snow storage areas: 'Completed Snow Storage Expansion Phase I' along the south airfield and 'Snow Storage Expansion Phase II by Lagoon 3' on the west side, with green arrows indicating access routes between locations.
    CategoriesKey Documents TagsAirport Expansion, Airport Layout Plans, Map, Port Of Seattle, SAMP, Sea-Tac Airport
  • Sea-Tac Airport Key Map (2016)

    ★ 32
    CategoriesKey Documents TagsMap, property, Runways, seatac
  • Mitigation bank service area pdf
    2026-07-31

    Mitigation bank service area map

    A map showing the mitigation bank service area within WRIA 9 (Water Resource Inventory Area 9), encompassing three subwatersheds: the Lower Green River Subwatershed, the Duwamish Estuary Subwatershed, and the Nearshore Subwatershed. The map displays the Green-Duwamish River and its associated streams in the greater Seattle/King County area of Washington State. An inset map shows
    TagsDuwamish River, Environment, King County, Map, Washington State
  • Mitigation bank project sites pdf
    2026-07-31

    Mitigation bank project sites map

    A map showing potential mitigation sites and existing Port of Seattle habitat sites in the greater Seattle area, including Terminal 25, Terminal 117, and the Auburn Site. The map covers cities including Seattle, Burien, Tukwila, SeaTac, Des Moines, Federal Way, Kent, Renton, and Auburn. Sites are categorized by land use type including storage, vacant, and
    TagsAuburn Wetland, Environmental Impact Statement, Map, Port Of Seattle, Sea-Tac Airport
  • Planning for the airport and its environs 8216the sea tac success story8217 091977 page 9

    Second Runway Aerial Line Drawing – Planning for the airport and its environs: The Sea-Tac success story page 9

    A black-and-white site plan map labeled 'Figure 2. SEA-TAC INTERNATIONAL AIRPORT,' showing the airport's runway configuration, taxiways, terminal area, and surrounding road network. A north arrow is included in the lower left corner, orienting the map with runways running roughly east-west.
    TagsDraft, FAA, Map, Office of Environmental Quality, Peat Marwick Mitchell, Sea-Tac Communities Plan, Second Runway
  • Aaa 2018 ILA port of seattle and city of seatac 25
    2026-07-04

    SAMP NTP: 31 projects by the numbers

    It’s all about construction permits The Sustainable Airport Master Plan Near Term Projects Draft Environmental Impact Statement is a description of the effects of the largest expansion in airport history. But at bottom, it consists of thirty-one construction projects. What we find striking is the absence of detail on most of those projects. In most
    CategoriesExplainers, News Stories Tagsbeta, Map, SAMP Draft SEPA EIS
  • Stcp chapter 6 pg 9 north reinforcement area program application 1

    Sea-Tac Communities Plan: North Reinforcement Area Program Application

    This planning map, document number 6.6.5, is from the Sea-Tac Communities Plan sponsored by the Port of Seattle and King County. It depicts the North Reinforcement Area program application, showing grid-cell zones color-coded by noise mitigation category—including acquisition, purchase guarantee, cost-sharing insulation, and limited cost-sharing insulation—for the residential area surrounding Seattle-Tacoma International Airport, with landmarks such as Cedarhurst Elementary, Boulevard Park Elementary, Hilltop Elementary, Glacier High, and Sunset Junior High visible.
    TagsKing County, Map, Noise Mitigation, Port Of Seattle, Sea-Tac Communities Plan
  • Sea kcia part 150 dnl contours POS noise monitors

    Map of Sea-Tac and KCIA DNL contours with Port of Seattle Noise Monitors

    This map displays noise exposure contours for Seattle-Tacoma International Airport (SEA) comparing the 1991 and 2032 DNL65 projections, alongside KCIA DNL65 and DNL70 contours near Georgetown/South Seattle. It also shows POS (Port of Seattle) permanent and portable noise monitor locations (2020–2022) across the South Seattle, Burien, SeaTac, Tukwila, and Renton areas, with runway geometry markers for KCIA and COTKU [1].
    TagsDNL65, KCIA, Map, Noise Monitors, Part 150, Sea-Tac Airport
  • UpgradeSEA map Upgrademain
    2026-04-23

    Upgrade SEA Airport Improvement Map

    An aerial overview of Seattle-Tacoma International Airport annotated with labeled capital improvement projects under the 'Upgrade SEA' program, including C Concourse Expansion, S Concourse Evolution, Concourse A Building Expansion for Lounges, SEA Gateway, Main Terminal Improvements Program, Baggage Optimization, Checkpoint 1 Relocation, Automated Parking Guidance System, Restroom Renovation, Roadway Improvements, Curbside Accessibility and Safety, and SEA Underground Controls Replacement. The Upgrade SEA diamond logo is visible in the lower left corner.
    TagsAirport Expansion, capital improvements, Map, Sea-Tac Airport
  • 2024 SF NAP JPG 1
    2026-04-21

    2024 South Flow Noise Abatement Procedures graphic

    A 2018 Garmin-based aeronautical chart illustrating South Flow Noise Abatement Procedures at Seattle-Tacoma International Airport, showing the Initial Departure Corridor (green lines), Arrival Corridor (red lines), and a reference point north of the SR-520 bridge, with aircraft maintaining 5 nautical miles and 3,000 feet altitude constraints.
    TagsFlight Tracks, Map, Noise Abatement Procedures, Sea-Tac Airport

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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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