This document outlines the Future (2021) Noise Exposure Map and Noise Compatibility Program for Seattle-Tacoma International Airport, projecting noise levels for a typical day in 2021 assuming all recommended noise abatement measures are in place. Using the FAA's Integrated Noise Model, it forecasts 419,597 annual aircraft operations — a 15.4% increase over 2016 baseline levels — and maps noise contours at 65, 70, and 75 decibel DNL thresholds. The report details the fleet mix and runway usage data used in the modeling, with Boeing 737-800s representing the largest share of daily operations.Open full document
Notes
This appendix presents the methodology and input data for the Future (2021) Noise Exposure Map/Noise Compatibility Program (NEM/NCP) for Sea-Tac Airport, prepared using FAA’s Integrated Noise Model Version 7.0b. It includes projected 419,597 annual operations for 2021 with noise contours at 65, 70, and 75 DNL levels. Detailed tables show the distribution of average day operations by aircraft type, fleet mix, and runway end utilization assumptions.