TagCATEX(16)

The Quiet Skies Coalition challenges the FAA's Categorical Exclusion (CATEX) for new turboprop flight routes over Burien, Washington, arguing that the FAA's own noise analyses show significant increases in noise levels that exceed the agency's 1.5 dB DNL significance threshold — contradicting the FAA's claim of no environmental impact. The coalition contends that the FAA's reliance on an outdated 2013-2018 Sea-Tac Part 150 noise study, which failed to account for a 51% increase in airport operations, led to inaccurate noise assessments and improper use of a categorical exclusion. Community members and the City of Burien are urged to join legal and political efforts to challenge the FAA and Port of Seattle's authority over flight path decisions affecting residents from Shoreline to Federal Way.

A legal and regulatory analysis arguing that the FAA must conduct a broader cumulative environmental impact review of Seattle-Tacoma International Airport expansion, following a 9th Circuit Court ruling that remanded the 'Burien Turn' flight path back to the FAA. The document contends that multiple airport expansion projects—including the addition of 14 new gates and the extension of Highway 509—were each approved individually under categorical exclusions (CATEXs) without properly accounting for their combined effects on noise, air quality, and environmental justice communities. The author argues that under NEPA regulations, the FAA is required to analyze these past, present, and future actions together to determine whether their collective impact is significant.

This document presents a point-by-point rebuttal to an FAA 'Limited Update' regarding a new flight departure procedure at Seattle-Tacoma International Airport, arguing that the FAA has failed to conduct required safety risk analyses, properly assess cumulative noise and air quality impacts on environmental justice communities, and comply with court-ordered environmental review under NEPA. The authors contend that the FAA is understating the scope and timeline of the Sea-Tac Airport Master Plan (SAMP) expansion while dismissing significant health, noise, and emissions impacts on nearby residents. The critique calls out procedural shortcuts, incomplete public comment responses, and what it characterizes as predetermined conclusions designed to avoid full environmental scrutiny.

In a July 17, 2020 email to Burien Airport Committee members, Sharyn Parker urges the City of Burien to accept Sea-Tac Airport's offer to place a temporary portable noise monitor in the city, noting there is currently no monitor near the 'New Route' where Q400 turboprop and jet aircraft continue to fly westbound during north-flow conditions. Parker cautions that site selection is a complex process requiring careful attention to obstacles, noise buffers, and power availability, drawing on her experience with King County International Airport where similar projects took two to four years. She recommends the city respond with a simple 'yes' by the July 24, 2020 deadline and request an extension if needed to properly identify one or two suitable monitoring locations.

In March 2020, the Burien City Council wrote to the FAA requesting a comprehensive Environmental Impact Statement (EIS) that fully accounts for the cumulative noise and air quality impacts of Sea-Tac Airport's rapid growth, which saw operations increase by nearly 30% between 2014 and 2018. The letter argues that multiple airport expansion projects — including new terminal gates and altered flight paths — were each approved without significant environmental review, but together have caused substantial harm to surrounding communities. The council also cites a 2019 Ninth Circuit Court ruling that found the FAA failed to properly assess cumulative impacts, and demands the agency conduct a thorough analysis using a pre-expansion baseline of 2013.

This January 2020 FAA document updates a flight procedure at Seattle-Tacoma International Airport (SEA), allowing the airport's air traffic control tower to automatically direct southbound turboprop aircraft to make a westerly turn shortly after takeoff during north-flow operations, between 6am and 10pm. The change, which applies to roughly 90% of affected turboprop departures, was previously halted after the City of Burien filed a legal challenge. A thorough environmental and noise review found only minor noise increases in some areas, well below the FAA's thresholds requiring further review.

These documents relate to community and legal efforts surrounding Sea-Tac Airport flight path and environmental policy in late 2019 and early 2020. They include notes from a December 2019 call with attorney Matt Adams discussing the aftermath of a 9th Circuit Court ruling against the FAA's automated flight turn over Burien, and a letter from 350 Seattle urging Washington State to include climate impacts in a comprehensive Sea-Tac Airport impact study. Key topics include cumulative environmental review requirements, potential EIS obligations under NEPA, and the significant greenhouse gas emissions attributed to Sea-Tac operations.

The Ninth Circuit Court of Appeals partly sided with the City of Burien in its challenge against the FAA's approval of a flight procedure that routes low-flying turboprop planes westward over Burien after takeoff from Seattle-Tacoma Airport. The court found that the FAA acted arbitrarily and capriciously by failing to consider all reasonably foreseeable future actions at Sea-Tac when evaluating whether the procedure's cumulative environmental and noise impacts required a full environmental review under the National Environmental Policy Act (NEPA). The FAA had attempted to exempt the procedure from such review by classifying it as a 'categorical exclusion,' but the court determined that the agency's cumulative impacts analysis was incomplete.