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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

    Sea-Tac Airport Airport Snow Storage Expansion Diagram

    ★
    Aerial satellite map of 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
  • 2014-06-15

    Airport Key Map: Sea-Tac Airport Property Zones

    ★ 32
    This Airport Key Map, published by the Port of Seattle on June 15, 2014, provides a general reference overview of property zones surrounding Seattle-Tacoma International Airport. It identifies distinct areas including the Airfield, Terminal, Commercial, South of Airfield, South of 200th, and North of Airfield zones, and distinguishes between Port of Seattle property, lease boundaries, non-Port property, land available for redevelopment, and the proposed SR 509 corridor. The aerial photo, taken in Spring 2012, is intended for general reference only and is not approved for navigation use.
    CategoriesKey Documents TagsMap, Port Of Seattle, property, Runways, SAMP, Sea-Tac Airport, seatac, SR509, Sustainable Airport Master Plan
  • Dnl 2032 70
    2032-01-01

    DNL 65 Noise Contour Map — Sea-Tac Airport Area with Noise Complaint Markers

    An OpenStreetMap-based map centered on the Seattle–Tacoma (Sea-Tac) Airport area showing a highlighted corridor (shaded in orange/yellow) and a black oval outline delineating what appears to be a flight path or noise impact study zone. Clustered purple markers, likely representing noise complaint locations or monitoring stations, are visible near Burien and a southern cluster near Des Moines/Federal Way, with Sea-Tac Airport identifiable near the center of the map.
    TagsDNL65, Map, Noise Countour, Part 150, Sea-Tac Airport
  • Appendix k children8217s environmental health and safety risks socioeconomics and environmental justice NEPA final ea and SEPA page 124

    Appendix K SEPA Environmental Justice Disparities Map page 124

    Appendix K of this environmental review examines socioeconomic conditions, environmental justice, and children's health and safety risks in the area surrounding the proposed project. It finds that 23.3% of the population in the study area is under 18—higher than both King County and statewide averages—and identifies two schools within the project boundary that could expose children to environmental health risks. The appendix also includes an economic impact analysis for the Northwest Seaport Alliance and a separate environmental justice memorandum prepared under Washington State's environmental review process.
    TagsEnvironmental Justice, Landrum & Brown, Map, NEPA, SAMP, SEPA, Sustainable Airport Master Plan, Washington State Department Of Health
  • 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, State of Washington
  • 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
  • 2026-07-14

    Sea-Tac Communities Plan: Map Supplement to Sixth Month Report — Community Trends and Characteristics, Land Use, Ground Transportation and Traffic, Aesthetic and Visual Characteristics, Natural Determinants

    This document is a map supplement to the sixth-month element report for the Sea-Tac Communities Plan, a planning study sponsored by the Port of Seattle and King County and partially funded by a federal FAA grant. It covers five key topics—community trends and characteristics, land use, ground transportation and traffic, aesthetic and visual characteristics, and natural determinants—for the communities surrounding Seattle-Tacoma International Airport. The supplement includes 1970 census tract maps of the Sea-Tac area and an errata note correcting a data classification error for Census Tract 272 related to public assistance recipients.
    TagsKing County, Map, Port Of Seattle, Sea-Tac Communities Plan, STCP
  • 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
  • 2026-07-10

    Sea-Tac Communities Plan – Planning Maps

    The Sea-Tac Communities Plan really was a plan. Because Sea-Tac Airport was sited in a growing area, the Second Runway expansion presented huge challenges. Sea-Tac became the ‘alpha-tester’ for many FAA initiatives. The question they were trying to answer was: how can any major airport function in harmony with its surroundings? One idea, which the
    TagsLand Use, Map, Sea-Tac Communities Plan
  • Stcp chapter unk pg unknown zoning and land use map unk

    STCP Zoning and Land Use Map — Des Moines and Kent Area

    A black-and-white planning grid map (document reference POS 21231) showing residential and institutional land use in the Des Moines/Kent area south of Seattle, including landmarks such as Mt. Rainier High School, Pacific Junior High, Midway Elementary, Parkside Elementary, and Highline Community College. Major roads visible include S. 223rd St., 16th Ave. S., 24th Ave. S., Kent-Des Moines Road, and Pacific Highway South, with Des Moines city limits and Kent city limits marked.
    TagsCity of Kent, Des Moines, Land Use, Map, STCP

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  • StART SEA Stakeholder Advisory Round Table
    Add to CalendarMWednesday Aug 26, 5:00pm - 7:00pm
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    START meetingagenda 2026826 final 0 pdf

    Meeting Objectives Introduce the primary feedback themes identified by StART members regarding StART’s Operating Procedures and determine areas that may warrant future discussion. 5:00 PM – Welcome Meeting Management Welcome Lead: Andrés Mantilla, Facilitator, Uncommon Bridges; Wendy Reiter, Airport Managing Director, POS 5:15 PM – Dinner: All participants eat. 5:30 PM – StART Operating Procedures

    [...]
  • Commercial Aviation Work Group
    Add to CalendarMThursday Sep 3, 10:00am - 1:30pm
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    Cawg agenda sep 3 26 virtual pdf

    Meeting Agenda 10:00 a.m. – 10:15 a.m. | Welcome – Evan Nordby, Chair a. Introductions and Agenda Reviewb. Status of appointments and non-voting member invitationsc. Other updates as necessary 10:15 a.m. – 11:00 a.m. | Is it practical and legal to operate the western Washington [Puget Sound] airports as a single airport system? – Consultant

    [...]

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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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