Sound Information Noise Abatement Office Fact Sheet PM5.3.94

The Port of Seattle provides one of the most comprehensive noise management programs in the nation with Sea-Tac’s noise abatement and mitigation measures. Sea-Tac’s noise programs are divided into Noise Abatement and Noise Remedy. Noise abatement programs relate directly to noise reduction at the source – models of aircraft and engine types at Sea-Tac, flight procedures, ground noise restrictions, etc.. Noise remedy programs are those that mitigate the effects of noise in the impacted communities. These type of programs include sound insulation of homes, sales assistance and the home acquisition and relocation program. NOISE ABATEMENT PROGRAMS Noise Budget This program guarantees that Sea-Tac will move steadily and predictably toward an all Stag6 3 (the quietest) jet fleet, reducing noise each year over the next 10 years. The “budget” allocates the maximum amount of noise that-airlines are allowed to make each year at Sea-Tac and this allocation is reduced annually. During the first three years of the program Sea-Tac's Stage 3 fleet rose to 81 % from 50%. The national Stage 3 fleet is at 59c70 for 1993/94. Nighttime Limitations This program, which went into effect Oct. 1, 1990, phases out Stage 2 (the noisiest) jet aircraft flights during the nighttime hours. Each year the nighttime hours expand until they restrict operation of these jets between 10 p.m. and 7 a.m. on October 1 , 1995. Ground Noise Control Powerbacks. Airlines at Sea-Tac are not allowed to use engine power to back away from gates. With the use of tugs, all…
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