Category : Key Documents(100)

The 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.

Technical analysis of airspace interactions between Sea-Tac Airport and Boeing Field, examining runway capacity models, aircraft delay calculations, and the effects of airspace interactions on airport operations. The document presents detailed capacity and delay calculations using computerized models.

Seattle's 2018 Community Greenhouse Gas Emissions Inventory, prepared by the Seattle Office of Sustainability & Environment, tracks and analyzes the city's greenhouse gas emissions across sectors including transportation, buildings, industry, and waste. The report compares 2018 emissions data against previous years, examines per capita trends, and outlines Seattle's climate reduction goals and strategies. Note: This document focuses on citywide carbon emissions and climate policy, and does not address Sea-Tac Airport noise issues.

Port of Seattle Commission agenda memorandum requesting $30 million for 2026 environmental remediation and approval of a $259 million five-year spending plan for cleanup of historical contamination at maritime and aviation properties. The program addresses contamination from past industrial operations including Lower Duwamish Waterway Superfund Site and various terminal locations.

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.

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.