STIA Airport Noise Reduction Programs Sound Information Fact Sheets Bundled 08-1998 0001

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 nois'e programs are divided into Noise Abatement and N–oise 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 co'mmunities. 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 Stage 3 (the quietegt) 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. Since the inception of the program in January 1 991 , Sea-Tac's Stage 3 fleet mix has increased from 50% to 85%. The national Stage 3 fleet mix in 1996 was 70%. .e Nighttime Limitations This program, Qhich went into effect Oct. 1, 1990, phases out Stage 2 (the noisiest) jet aircraft flights during the nighttime hours. Each year the nighttime hours expanded until October 1, 1995. Since 1995, operations'of these jets have been restricted between p.m. and 7 a.m.. Ground Noise Control Powerbacks. Airlines at Sea-Tac are not allowed to use engine power to back away from gates. With the…
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