Skip to content
  • STNI
  • Statistics
    • Ops and Passengers
      • King County International Airport (Boeing Field) Annual Operations
    • Financials
    • Aviation fuel uplift in the State of Washington 2018 – 2025
      • Aviation Fuel Tax Revenue in the State of Washington 1983-2025
      • Aviation Fuel Uplift at Sea-Tac Airport
    • Air Quality Monitoring
    • Flight Tracking
      • Flow and Flight Tracks
      • Five Year Comparison
      • Busiest Hours and Days
    • SEL Noise Reports & Graphs
      • About The Permanent Noise Monitors
      • Minutes of Quiet by Noise Monitor
      • Noise Events mapped
      • Noise Events (SEL)
    • Runways
    • Employees
    • Real Estate
      • Port Properties and Trees mapped
    • Parking
  • Events
  • Protest
    • Regular Events
    • Legislation 2026
    • Complain about a particular flight
    • Advocacy Organizations
    • Media Outlets
    • People
    • The Port of Seattle
      • Commission Meetings
      • Public Records Requests
      • StART
      • Highline Forum
    • Contact Your Electeds
  • Resources
    • FAQs
      • FAA Occurrences/Accidents/Indents
    • The SAMP
      • SAMP Public Comment Template
        • Two versions of Appendix K: NEPA/SEPA 2018 vs 2023
      • SAMP NTP: 31 projects by the numbers
      • SEPA Draft EIS (2026)
      • SAMP Record of Decision/FONSI (2025)
      • SAMP Draft EA (October 2024)
      • 2018 Scoping
    • Port Packages
      • Port Package Property Costs
      • Port Packages mapped
      • The Port Package Explainer
      • So you want a (first-time) Port Package? Start here
      • Port Package Looker Upper
      • How do I determine if I have a Port Package or Avigation Easement?
      • Progress on Port Package Update legislation
      • Having a Port Package Problem?
      • Port Package Site Visit Follow-Up
    • Document Library
    • Explainers
      • The Airport Law Cheat Sheet
      • The Grant Explainer
    • External Articles
    • History
      • Timeline
      • The Sea-Tac Communities Plan
        • Sea-Tac Communities Plan – Planning Maps
      • PSRC Third Runway Decision Process
    • Studies
    • Videos
  • Stories
  • Mission
  • Subscribe
  • Contact
Scroll down to content

Get InformedStay Informedx

I understand that you will never share my information with anyone, you will only use it to keep me updated on relevant events and that I may unsubscribe at any time.

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.

TagEnvironmental Review(48)

Advanced Search Options

  • Dates
  • Media
    • External Articles
    • Images
    • PDFs
    • Video
    • Audio
  • Order By
  • Sustainable Airport Master Plan 2019 Scoping Documents

    ★
    1The same documents can be found here. [get_filebird_folder folder_id=170] 1We often provide replicas of important documents, news stories, etc. We refer to this as ‘belt and suspenders’. Although we always recommend that researchers source from the original sites, computers often fail. It’s good to have backup.
    CategoriesKey Documents TagsEnvironmental Review, SAMP, Scoping documents, Sustainable Airport Master Plan
  • 2020-02-01

    Cumulative impacts: 1050.1F desk reference (v2)

    ★ 32
    This FAA guidance document explains how to analyze cumulative environmental impacts for aviation projects, meaning the combined effect of an airport action together with other past, present, and foreseeable future actions by any agency or party. It outlines how to define the study area, determine significance, and consider mitigation, noting that even individually minor impacts can together become significant. While focused on FAA projects broadly, it is relevant to noise and environmental planning at airports like Sea-Tac, where surrounding development and multiple simultaneous projects can compound environmental effects.
    CategoriesKey Documents TagsEnvironmental Review, FAAFolderFAA
  • 2026-05-01

    Key takeaways from what’s heating up for spring: federal permitting policy update

    Environmental Science Associates hosted a webinar examining rapid changes in federal environmental permitting, covering topics such as streamlined categorical exclusions under NEPA, cultural resources consultation under Section 106, and the growing use of AI tools in environmental review workflows. Experts noted that agencies face increasing pressure to accelerate infrastructure permitting timelines while maintaining legally defensible documentation, particularly as recent court decisions and regulatory rescissions create greater agency discretion and less standardized guidance. Organizations are advised to invest in adaptable workflows and early interagency coordination to manage permitting risk in this shifting landscape.
    TagsCEQ, Environmental Review, ESA, NEPAFolderEnvironment
  • 2025-10-13

    Port Commission briefing SAMP: SEPA Includes Additional Analyses

    A presentation slide titled 'SEPA Includes Additional Analyses' lists environmental review topics covered under the State Environmental Policy Act (SEPA), including Earth, Air, Water, Plants and Animals, Energy and Natural Resources, Environmental Health, Land and Shoreline Use, Transportation, Public Services and Utilities, Climate, Environmental Justice, and Cumulative Impacts. A footnote notes that Climate, Environmental Justice, and Cumulative Impacts were removed from the NEPA Final EA, highlighting differences between state and federal environmental review processes relevant to Sea-Tac Airport proceedings.
    TagsEnvironmental Review, Port Of Seattle Commission, SAMP, Sea-Tac Airport, SEPAFolderCommission
  • 2025-07-02

    Draft Cultural Resources Assessment for the Port Of Seattle Industrial Wastewater Treatment Plant Project, King County, Washington

    This July 2025 draft cultural resources assessment, prepared by Stell for WSP USA and the Port of Seattle, evaluates potential cultural and archaeological impacts associated with a proposed Industrial Wastewater Treatment Plant project in King County, Washington. The 10.6-acre study area is located near Des Moines and covers sections in Townships 22N and 23N. The assessment found no archaeological sites, isolates, or traditional cultural properties within the project area.
    TagsDes Moines, Environmental Review, Historic Preservation, King County, Port Of SeattleFolderGrid
  • Wsp007.01 draft culturalresources desktopstudy july 2, 2025 pdf
    2025-07-02

    Draft Cultural Resources Assessment for the Port Of Seattle Industrial Wastewater Treatment Plant Project, King County, Washington

    This July 2025 draft cultural resources assessment, prepared by Stell for WSP USA and the Port of Seattle, evaluates potential cultural and archaeological impacts associated with a proposed Industrial Wastewater Treatment Plant project in King County, Washington. The 10.6-acre study area is located near Des Moines and covers sections in Townships 22N and 23N. The assessment found no archaeological sites, isolates, or traditional cultural properties within the project area.
    TagsDes Moines, Environmental Review, Historic Preservation, King County, Port Of SeattleFolderGrid
  • 2025-01-15

    Interlocal agreement between the cities of Burien, Des Moines, Normandy Park and SeaTac for environmental review of the Sea-Tac Airport Sustainable Airport Master Plan

    Four cities near Sea-Tac Airport — Burien, Des Moines, Normandy Park, and SeaTac — have joined together under a formal interlocal agreement to coordinate their review of the Port of Seattle's Sustainable Airport Master Plan (SAMP), which could bring significant noise and environmental impacts to surrounding communities over the next 20 years. The agreement establishes a shared process for hiring consultants, submitting joint public comments, and responding to environmental documents produced under federal (NEPA) and state (SEPA) law. The collaboration is set to run through December 31, 2027, with the City of Des Moines managing consultant contracts and the City of Burien overseeing fiscal matters.
    TagsEnvironmental Review, Interlocal Agreement, NEPA, SAMP, SEPAFolderSeaTac
  • 2024-12-12

    Interlocal agreement for coordinated SAMP review

    The cities of Burien, Des Moines, Normandy Park, and SeaTac are renewing a cooperative agreement to jointly review and respond to the Port of Seattle's Sea-Tac Airport Sustainable Airport Master Plan (SAMP), which outlines future airport growth that could significantly impact neighboring communities. The new Interlocal Agreement (ILA), approved by Des Moines City Council in December 2024, extends collaboration through December 31, 2027, allowing the cities to share consultants and coordinate formal comments on the airport's environmental review process under NEPA and SEPA. Des Moines has committed up to $74,170 toward consultant services, with each city's share determined by relative population.
    CategoriesMeetings TagsEnvironmental Review, Interlocal Agreement, SAMP, SAMP Four City ILA, Sea-Tac AirportFolderFour City ILA
  • 2024-12-10

    SEA Sustainable Airport Master Plan (SAMP): Environmental review

    The FAA released a draft Environmental Assessment in October 2024 for Seattle-Tacoma International Airport's Sustainable Airport Master Plan (SAMP), which outlines 31 near-term projects to expand airport capacity for growing passenger demand. Key projects include a new passenger terminal and gates, taxiway extensions, cargo facility changes, and employee parking updates. The cities of SeaTac, Burien, Des Moines, and Normandy Park are collaborating to submit technical comments on the plan before the December 13, 2024 deadline.
    TagsCity Of SeaTac, Environmental Review, NEPA, SAMP, SEPAFolderSeaTac
  • 2024-10-18

    Proposed Des Moines Creek Business Park West Development: Hearing Presentation by Laura Hartema, Friends of Des Moines Creek

    Laura Hartema of Friends of Des Moines Creek presented concerns about the proposed Des Moines Creek Business Park West Development (File #LUA2022-0044) in October 2024, highlighting significant environmental impacts including the removal of over 500 trees, filling of wetlands and streams, and more than 30 acres of site disturbance. The presentation compared 1936 and 2023 aerial photos showing the area remains largely forested, and raised issues such as arsenic in soils, stormwater management concerns, and negative effects on neighboring residential properties. The group argues the project requires more thorough environmental review to demonstrate it will not cause significant harm to critical natural areas and the surrounding community.
    TagsArsenic, Des Moines Creek, Des Moines Creek Business Park, Environmental Review, SEPAFolderDes Moines Creek

Posts pagination

Page 1 Page 2 Page 3 … Page 5
Sidebar On/Off

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...]


Help study childhood asthma. Get free HEPA filter!

read more...

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...

The Podcast!

Subscribe to the only podcast devoted to policies, politics, history, impacts for people living under the flight path everywhere. It’s definitely not just about noise!
  • Sea-Tac Noise.Info
  • Connect with STNI

    • Subscribe
    • Port Package Problem?
    • Donate
    • Podcast
    • Socials
      • Facebook
      • X (Twitter)
      • Bluesky
      • Instagram

    "From the City Manager: Airport issues" — , 2018

  • Learn

    • Frequently Asked Questions
    • Explainers
    • Youtube
    • Research Requests
    • Make a complaint
  • Goals

    Fulfill the promises of 1976:
    • Compensation
    • Reduced noise
    • Improved air quality
    • Environmental remediation
Login/Register
©2026•Data Privacy

Message

We use cookies to provide basic functionality. We also provide access to search engines in order to provide site analytics. We do not sell or share your data.
V V