TagNoise Abatement Procedures(103)

Chapter 53.54 RCW authorizes Washington port districts operating large airports (such as Sea-Tac) to carry out programs that reduce the impact of jet aircraft noise on surrounding neighborhoods, including purchasing properties, providing soundproofing, and offering transaction assistance to affected homeowners. The law defines 'impacted areas' with specific distance limits from runways and allows properties within those boundaries to receive noise mitigation benefits. Recent 2024 updates expand the program to allow inspection, repair, or replacement of previously installed noise mitigation equipment that is no longer working as intended or has caused structural damage.

This document is the FAA's official Record of Approval for King County International Airport/Boeing Field's (Boeing Field/BFI) Noise Compatibility Program under Federal Aviation Regulation Part 150. It outlines six key recommendations to reduce aircraft noise impacts on nearby residents, including developing combined noise contours with Seattle-Tacoma International Airport, implementing quieter flight approach and departure procedures, and upgrading noise monitoring systems. The FAA reviewed and issued determinations on each recommendation, approving most measures on a voluntary basis while noting that approvals do not constitute commitments to implement the actions.

This document is the FAA's Record of Approval for Seattle-Tacoma International Airport's Noise Compatibility Program, which outlines measures to reduce aircraft noise and manage land use around the airport. It covers both new and updated measures, including voluntary rescheduling of nighttime flights, preferential runway use during nighttime hours, and a Fly Quiet Program to encourage airlines to follow noise abatement procedures. The FAA approved most measures as continuations of previously approved programs dating back to 1985, while disapproving the engine maintenance run-up regulations.

Local communities surrounding Seattle-Tacoma International Airport are demanding accountability from the Port of Seattle (POS) regarding its compliance with FAA Part 150 noise mitigation measures, some dating back to 1985. The document raises detailed questions about ten specific program elements — including voluntary flight rescheduling, engine run-up restrictions, noise abatement corridors, the Fly Quiet Program, and home sound insulation — asking for data on how consistently and effectively each measure has actually been implemented. Critics argue that despite decades of commitments, key noise reduction tools such as a Ground Run-Up Enclosure have been quietly dropped, while growing air traffic continues to harm residential neighborhoods and environmentally vulnerable populations.

This document is an invoice and supporting monthly status report from Vianair, Inc. to the City of Alexandria for consulting services related to flight procedure design and noise analysis conducted between February 17 and March 16, 2024. The total billed amount of $19,500 covers work by multiple consultants including flight procedure design, steering committee meetings, website content development, and software analysis services, and was approved by City of Alexandria representative Felipe Ip on May 13, 2024.

The BANGR Nine Departure is a standardized instrument departure procedure (SID) for pilots flying out of Seattle-Tacoma International Airport (SEA), directing aircraft on specific headings and altitudes depending on which runway they use. Aircraft departing on northbound runways (34L, 34C, 34R) climb to at least 932 feet before routing through waypoints like CUSBU, NESOE, or DODVE, crossing WUREL at or above 3,100 feet, while southbound runway departures (16L, 16C, 16R) follow similar climb profiles through waypoints like CAVOB, OTLIE, or WESET, crossing RENBE at or above 3,000 feet. All routes converge at the BANGR waypoint, which must be crossed at or above 10,000 feet, with specific minimum climb gradients established to manage aircraft noise and terrain clearance in the surrounding communities.

The OZWLD One Departure (RNAV) is an instrument departure procedure for Seattle-Tacoma International Airport (SEA) that routes aircraft departing from runways 34L, 34C, and 34R northwestward through a series of waypoints—including NESOE, CUSBU, DODVE, WUREL, ATOME, BREMM, and OZWLD—before continuing on course. The procedure is only available between 2200 and 0600 local time, a restriction that reflects noise-mitigation efforts limiting certain departure routes to overnight hours. Aircraft must maintain a minimum climb gradient of 500 feet per nautical mile to 940 feet, cross WUREL at or above 3,100 feet, and maintain 9,000 feet until cleared to their filed altitude.