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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.

TagAirport Expansion(155)

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  • 2026-01-01

    2026 Airfield Work Areas Layout Plan

    ★
    A color-coded site plan map of Seattle-Tacoma International Airport showing 13 designated 2026 Airfield Work Areas, including Runway 16C-34C reconstruction (blue), Taxiways N and Z improvements (orange), and multiple cargo area utility and rapid-set projects. The map identifies contractor staging areas, Olympic Road, Cascade Road, Airport Expressway, and Pacific Road as geographic references.
    CategoriesKey Documents Tags1st Runway, Airport Expansion, Airport Layout Plans, Airport Maintenance Technology Magazine, Construction, Runways, Sea-Tac Airport, Taxiways
  • 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
  • 2025-10-28

    Port of Seattle Regular Commission Meeting

    ★
    The Port of Seattle held a Regular Commission Meeting on October 28, 2025, covering routine business such as approval of meeting minutes, claims totaling over $156 million, and several construction and lease authorizations related to Seattle-Tacoma International Airport facilities. Agenda items included contracts for snow storage expansion, a building renovation at Sea-Tac, and a cruise terminal lease agreement. The commission also considered a resolution reaffirming the Port's Welcoming Port Policy in support of immigrants, refugees, and international visitors.
    CategoriesKey Documents, Meetings TagsAirport, Airport Committees, Airport Development Fund, Airport Expansion, Port Of Seattle
  • 2025-10-22

    Programmatic Environmental Checklist – Seattle-Tacoma International Airport Flight Corridor Management Program

    ★
    Environmental checklist for SEA’s Flight Corridor Management Program, which identifies and removes tree obstructions from airport flight corridors every five years to comply with FAA regulations. The document outlines the program’s background, implementation cycles, and environmental review process.
    CategoriesKey Documents TagsAirport, Airport Expansion, FAA, Port Of Seattle, SEPA
  • 2024-01-01

    Flight Corridor Safety Program 2024 – Category III Selection Summary

    ★
    Selection summary for the Flight Corridor Safety Program at Seattle-Tacoma International Airport, evaluating four firms (AECOM, HNTB, Jacobs Engineering, RS&H) for a $2M contract to manage obstructions consisting of trees and vegetation around the airport. HNTB was awarded the contract after receiving outstanding ratings across all criteria.
    CategoriesKey Documents TagsAirport, Airport Expansion, Aviation Committees, Port Of Seattle
  • 2022-06-01

    Everett Link Extension – EVLE Level 2 Station & Alignment Alternatives

    ★
    A draft planning map published by Sound Transit in June 2022 showing the Everett Link Extension (EVLE) Level 2 station and alignment alternatives, including the Representative Project (pink) and other alignment alternatives running between West Alderwood/Alderwood Mall in the south and Everett Station in the north, with proposed stations at Ash Way, Mariner, SR 99/Airport Rd, SW Everett Industrial Center, SR 526/Evergreen, Everett Mall, and Everett Station. Note: This map depicts the Everett Link Extension corridor and does not directly relate to Sea-Tac Airport noise policy; Paine Field is visible on the western edge of the map.
    CategoriesKey Documents TagsAirport, Airport Expansion
  • 2002-06-03

    Legal Analysis of King County’s Role in Des Moines Beach Park Conveyor Belt Proposal

    ★
    Legal counsel James L. Brewer analyzes King County’s jurisdictional authority regarding a proposed fill material conveyor belt operation at Des Moines Beach Park. The memo examines property interests, covenants requiring park use only, and concludes the proposed 30-month project would be inconsistent with park purposes due to significant disruption.
    CategoriesKey Documents, Litigation TagsAirport Communities Coalition, Airport Expansion, airport issues
  • 2002-06-03

    Des Moines Beach Park Legal Analysis and Department of Ecology Letter on Third Runway Fill Material

    ★
    Legal memorandum analyzing King County’s role in proposed Des Moines Beach Park conveyor belt operation, including property rights and park use restrictions. Includes Department of Ecology letter clarifying fill material certification requirements for Port of Seattle’s third runway construction.
    CategoriesCorrespondence, Key Documents, Litigation TagsAirport Expansion, Airport Law, Port Of Seattle
  • 2002-05-01

    C.A.S.E. MEETING MINUTES May 1, 2002

    ★
    Meeting minutes from Citizens Against Sea-Tac Expansion discussing various airport-related issues including geese shooting near schools, conveyor belt project opposition, arsenic contamination concerns, and updates from local representatives on legislative matters and environmental issues. Karen Keiser. Dave Upthegrove. Brett Fish.
    CategoriesKey Documents, Meetings, Organizations TagsAirport Communities Coalition, Airport Expansion, Arsenic, CASE, Conveyor, North Sea-Tac Park
  • 2002-05-01

    Financial Analysis For Redevelopment of Northeast Burien Special Plan Area

    ★
    A financial analysis report prepared by Economic Consulting Services for the City of Burien regarding the redevelopment of the Northeast Burien Special Plan Area. The report was completed in May 2002 and includes economic analysis and consulting services for the redevelopment project.
    CategoriesKey Documents TagsAirport, Airport Development Fund, Airport Expansion

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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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