TagLandrum & Brown(62)
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2025-09-24Final Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects: Seattle-Tacoma International Airport
★Final Environmental Assessment (EA) prepared by Landrum & Brown for the Port of Seattle and FAA (lead federal agency under NEPA) for the Sustainable Airport Master Plan (SAMP) Near-Term Projects at Seattle-Tacoma International Airport, signed by FAA Responsible Official Kandice N. Krull on September 24, 2025. The Errata section documents removal of climate change analysis -
2025-09-24
Final Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects: Seattle-Tacoma International Airport
★ 33The Federal Aviation Administration (FAA) released a Final Environmental Assessment (EA) in September 2025 for near-term construction and development projects at Seattle-Tacoma International Airport, prepared on behalf of the Port of Seattle. The Final EA was updated from an earlier Draft EA to reflect public and agency comments, correct errors, and remove sections on climate change, environmental justice, and cumulative impacts following changes to federal executive orders, regulations, and a 2025 Supreme Court ruling. These regulatory shifts meant the FAA was no longer required to analyze how the proposed projects might affect vulnerable communities or contribute to broader environmental trends. -
2013-10-15
Informal Runway Use Agreement (Appendix I 2013 Part 150 Study)
★ 32Appendix I from the 2013 Part 150 Study by Landrum & Brown. A Letter Of Agreement (LOA) where the Port Of Seattle agrees to using the Third Runway primarily for overflows and bad weather. Note the very official looking signature of the Port CEO, Tay Yoshitani. Also note that it is described as an ‘informal -
2013-10-01Seattle-Tacoma International Airport Part 150 noise compatibility study final: Chapter one – inventory
★This document is Chapter One of the Seattle-Tacoma International Airport (Sea-Tac) Part 150 Noise Compatibility Study, finalized in October 2013. It provides an overview of the airport's size, ownership by the Port of Seattle, and its role as the Pacific Northwest's primary commercial hub, while explaining the federal regulations (14 CFR Part 150) that guide airport noise compatibility planning. The study was undertaken to update a 2002 noise plan, accounting for major changes such as the opening of a third parallel runway in 2008, with the goal of reducing noise impacts on surrounding communities. -
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. -
2026-05-01Seattle-Tacoma International Airport SEPA Environmental Impact Statement for the Sustainable Airport Master Plan Near-Term Projects: Chapter 2 — Alternatives
This draft Environmental Impact Statement (EIS) evaluates proposed expansion projects at Seattle-Tacoma International Airport under Washington State's Environmental Policy Act (SEPA). It outlines a two-step screening process used to assess alternatives, including suggestions from public scoping such as building a new airport, using other transportation modes, and limiting growth — most of which were rejected for failing to meet the project's purpose of serving 56 million annual passengers at an optimal level of service. A No Action Alternative is also included, representing a future baseline without the proposed physical improvements. -
2026-05-01
Seattle-Tacoma International Airport SEPA Environmental Impact Statement for the Sustainable Airport Master Plan Near-Term Projects: Chapter 2 — Alternatives
Chapter 2 of the Draft SEPA Environmental Impact Statement (EIS) for Seattle-Tacoma International Airport (Sea-Tac Airport) Sustainable Airport Master Plan (SAMP) Near-Term Projects, prepared by Port Of Seattle, dated May 2026. Covers the two-step alternatives screening process under WAC 197-11 and RCW 43.21C, the No Action Alternative, and Table 2.3-1 evaluating scoping-suggested alternatives including Phased -
2025-09-01Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects: List of Preparers
This section of the Seattle-Tacoma International Airport Environmental Assessment lists the individuals and organizations responsible for preparing the EA for the Sustainable Airport Master Plan Near-Term Projects, finalized in September 2025. It includes contributors from the FAA, Port of Seattle, and multiple consulting firms covering areas such as noise analysis, air quality, surface transportation, wetlands, cultural resources, and public engagement. Key organizations involved include Landrum & Brown, Concord Engineering, Confluence Environmental Company, Parametrix, Stell Environmental, and others. -
2025-09-01Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects: List of Preparers
Chapter 6 List of Preparers for the Seattle-Tacoma International Airport (Sea-Tac Airport) Environmental Assessment (EA) for the Sustainable Airport Master Plan (SAMP) Near-Term Projects, dated September 2025 Final. Lists all individuals and organizations responsible for preparing the EA, including FAA Environmental Protection Specialist Kandice Krull, Port of Seattle staff (Sarah Cox, Steve Rybolt, Adele Pozzuto), -
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.