TagNoise Abatement Procedures(57)

An infographic comparing common outdoor and indoor sound levels measured in decibels (dB(A)), ranging from 0 (Threshold of Hearing) to 110 dB (Rock Band / Car Horn at 3 ft.). Outdoor examples include Car Horn, Gas Lawn Mower, Noisy Urban, and Busy Highway; indoor examples include Rock Band, Food Blender, Vacuum Cleaner, and Normal Speech.

A 2018 Garmin-based aeronautical chart illustrating South Flow Noise Abatement Procedures at Seattle-Tacoma International Airport, showing the Initial Departure Corridor (green lines), Arrival Corridor (red lines), and a reference point north of the SR-520 bridge, with aircraft maintaining 5 nautical miles and 3,000 feet altitude constraints.

The StART Aviation Noise Working Group met in February 2025 to review Seattle-Tacoma International Airport's Late Night Noise Limitation Program, which tracks aircraft noise between midnight and 5 AM and found 8% of operations exceeded thresholds in Q4 2025. The group decided against expanding the program to cover 11 PM–midnight, as most flights in that hour already use quieter aircraft and the change would triple monitored operations with little noise-reduction benefit. Additional updates covered a significant drop in propeller aircraft turns over Burien, progress on the Sound Insulation Program, and action items including a new 5–6 AM operations analysis and a multi-year trends chart.

This FAA guidance document explains how Airport and Community Roundtables work as forums where local governments, communities, and aviation stakeholders can collaboratively discuss concerns about nearby airport operations. The FAA participates in these roundtables to provide technical expertise but does not vote on issues, and roundtables can submit formal recommendations for changes to flight procedures or airspace operations. Any recommended changes must go through a thorough FAA review process, including safety and environmental assessments, and can take several years to implement.

This document is an invoice and supporting monthly status report from Vianair Inc. to the City of Alexandria for aviation consulting services covering January–February 2025, totaling $9,750. The work included flight procedure reviews, public meeting presentations, steering committee participation, and software analysis related to the Alexandria (SoA) project. The invoice was recommended for approval by representatives from Fairfax County and Prince George's County and formally approved by the City of Alexandria on April 15, 2025.