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Seattle-Tacoma International Airport Noise Budget, January 1, 1991

Document Library
Port of Seattle
Noise Mitigation
Part 150
1993

The Seattle-Tacoma International Airport Noise Budget, effective January 1, 1991, is a formal agreement designed to limit and gradually reduce overall aircraft noise levels at Sea-Tac Airport. It establishes a system of noise allocations assigned to individual passenger and cargo carriers, measured through defined noise exposure levels, with limits enforced on both a quarterly and annual basis. The agreement outlines key definitions and rules governing how noise is measured, allocated, and managed, including provisions for new entrants, international carriers, and government aircraft.

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Seattle-Tacoma International Airport (Sea-Tac, SEA) Noise Budget agreement effective January 1, 1991, establishing the Maximum Airport Noise Exposure Level (ANEL), PCANEL, CCANEL, Airport Noise Fund (ANF), Noise Certificates, PCNEL and CCNEL allocations, Compliance Periods, Enforcement Periods, and definitions for Allocated and Non-Allocated Aircraft Operations. Defines terms including Cargo Carrier, Equivalent Aircraft Cycle (Boeing 727-200 with JT8D-15QN engines), Daytime (7:00 a.m.–9:59:59 p.m.), Nighttime (10:00 p.m.–6:59:59 a.m.), Base Period (August 1–31, 1989), International Service, Government Aircraft, Foreign Carrier, and Stage 3 percentage rules. Published by Port of Seattle, document reference C:/Noise/Mediation/NB82790.PM4.

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