Item No. 11b_Attachment_4
Meeting Date: May 27, 2025

2024/25 Annual Report

Since its inception, StART's Aviation Noise Working Group, with a mission to prioritize and explore
potential near-term actions to reduce and prevent aviation noise, has made its Aviation Near-term
Noise Action Agenda its primary focus. The Agenda includes several programs and efforts intended to
provide aviation noise relief to the Highline Forum-member cities. In 2024 and 2025, work on the
Agenda continued but with more of a focus on results monitoring, considering refinements, if needed,
and promoting the agenda's outcomes both with internal and external audiences.
The Aviation Noise Working Group is comprised of a subset of StART members, Port staff, and
additional staff from the Highline Forum-member cities and other representational entities along with a
noise consultant to provide expert advice. The working group typically meets every other month.
Each meeting included a report on the Aviation Near-Term Noise Action Agenda, including tracking
the Runway Use Plan's goal of minimizing use of the Third Runway during the late night hours and
quarterly reports on the Late Night Noise Limitation Program which attempts to incentivize air
carriers to fly at less noise sensitive hours or transition to quieter aircraft.
Working Group members also received, at each meeting, a Sound Insulation update including the
latest on the Noise Insulation Repair and Replacement Pilot Program and a SEA operations update.
Along with appointed land use planners, the
working group members also participate on
the Part 150 Noise Study's Technical Review
Committee. The Part 150 Noise Study
provides the Highline Forum-member cities
with a significant opportunity to influence
current aviation noise reduction and
prevention programs and recommend new
approaches. Two of the working group
meetings dedicated substantial agenda time
to the Part 150 Noise Study in 2024.Your
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