Alaska Airlines plane departing Sea-Tac with Mount Rainier in the background

SEA Part 150

Noise Study

Project Overview

The Port of Seattle will begin a new multi-year Part 150 Noise and Land Use Compatibility Study update for SEA Airport in 2024.

A Part 150 Noise and Land Use Compatibility Study is a voluntary FAA program that sets guidelines for airport operators to document aircraft noise exposure, and to establish noise abatement and compatible land use programs. These noise abatement procedures and/or mitigation programs must be approved by the FAA in order to qualify for potential federal funding. This will be the fourth Part 150 update undertaken at SEA Airport since the initial study was conducted in 1985.

The study identifies and evaluates two components, (1) aircraft noise levels and (2) land uses, during two distinct phases of this study:

  • Noise Exposure Maps (NEM) phase – contour maps are produced showing existing and future aircraft sound levels using the FAA-required 65 DNL noise metric.
  • Noise Compatibility Program (NCP) phase – measures recommended in an NCP are designed to reduce noise and incompatible land uses within the noise exposure area. These may include noise abatement measures, noise mitigation measures such as sound insulation programs, and/or preventative measures.
North Terminal at Sea-Tac Airport

North Terminal at Sea-Tac Airport

Study Kickoff Workshops

The study will include extensive public engagement throughout the process. To begin these efforts, the Port had scheduled three Study Kickoff Workshops in June. The workshops were in an open-house format and occurred at the following dates, times, and locations and anyone was encouraged to attend:

Wednesday, June 5, 2024, 6:00PM – 8:00 PM
Gregory Heights Elementary School
16201 16th Ave. SW, Burien WA 98166
Thursday, June 6, 2024, 6:00PM – 8:00PM
Mount Rainier High School
22450 19th Ave. S, Des Moines, WA 98198
Saturday, June 8, 2024, 10:00AM – 12:00PM
Glacier Middle School
2450 S 142nd St., SeaTac, WA 98168