11b. Presentation
150 Noise and Land Use
Item No. __11b_supp_________ Meeting Date: October 25, 2022 Part 150 Noise and Land Use Compatibility Study Briefing October 25, 2022 Part 150 Overview • Code of Federal Regulations 14 (CFR 14) Part 150 – FAA established study guidelines • Airports must follow those guidelines to obtain FAA Airport Improvement Program (AIP) grant funding for abatement and mitigation projects • Part 150s focus on airport noise and land use incompatibilities within the 65 Day/Night Level (DNL) contour • Updated 65 DNL noise contours are the required outcome of a Part 150 • FAA-approved mitigation measures become eligible for AIP funding at 80% DNL Noise Contour • Day Night Level (DNL) – annual average of noise from aircraft operating at SEA • Contours must be produced using the FAA-required Aircraft Environmental Design Tool (AEDT) • 65 DNL is the FAA-required metric and level • Contours are depictions of the cumulative impacts of aircraft noise, and must be reviewed and approved by the FAA • FAA will not allow the use of noise monitoring data to assess impacts • The 65 DNL contour is the basis for land use analysis in the Part 150 • Current and future noise impacts will be assessed 3 SEA 2018 DNL Contour S 240th St S 100th St 4 Part 150 Land Use Planning • Identify noise incompatibilities within surrounding communities - below 65 DNL is compatible with all uses • Incompatible land uses at or above 65 DNL: – Residential – Schools – Places of worship – Hospitals – Nursing homes – Daycare facilities with licensed educators • Evaluate new potential noise abatement initiatives • Evaluate ongoing programs from past Part 150 Studies 5 SEA Part 150 Studies • Initial study completed in 1985 • Updates – 1992 – 2002 – 2014 • Extensive public involvement 6 2014 Part 150 Study Record of Approval – Noise Mitigation • Updated noise remedy boundary • Continuation of single-family sound insulation • New Condominium sound insulation • New Apartment sound insulation • Continuation of School Sound Insulation Program • Voluntary acquisition of residential in 3rd runway South Approach Transition Zone (ATZ) 7 2014 Part 150 Study Record of Approval – Noise Abatement • Continuation of Aircraft Maintenance Run-up restrictions • Continuation of the Fly Quiet Program including monitoring noise abatement procedures in place • Ongoing monitoring of the Noise Abatement Corridors • Evaluate and Upgrade the Noise Monitoring System • Continue to operate the Noise Programs Office 8 New SEA Part 150 Study Update • Consulting firm will be hired to lead the study and provide technical expertise • Finalizing the initial consultant scope – Detailed project scope will be developed with chosen consultant and presented to the Commission for input • Consultant procurement finalized by mid year 2023 • Study development and data collection late 2023 • Full public study outreach anticipated early 2024 • Multi-year study that may take 4-7 years to complete 9 Commission Project Authorization November 8th • $1M – authorized in 2022 • $6M – this request to fully fund the project • Authorization to procure consultant and execute contract 10
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