Port of Seattle Letter to Arlene Brown noise information

received your call to the noise information line on October 171h, 1999. Your message identified two areas of concern, low lli.rcraft over your neighborhood and jet noise after 10:00 p.m. The following information addresses these concerns. Small aircraft arriving and departing Sea-Tac Airport do not follow the same flight paths as the larger jets. This is primarily a safety and capacity issue. Because the smaller propeller aircraft fly at a slower rate,than the jets, they are turned early to move out of the way of the faster moving jets. Jet aircraft remain in a straight-out departure route for several miles. For the same reason, the propeller aircraft arrivals are also tum onto ' approach close in to the airport. Either way this puts some of the smaller aircraft over the ·Normandy Park area. I have enclosed a map, which depicts the propeller flight path, and your neighborhood is highlighted. Because these aircraft are arriving and departing, the altitudes are lower than aircraft overflying the area. Sea-Tac Airport does have a restriction on the older louder aircraft between the hours of 10:00 p.m. and 7:00a.m. The Port of Seattle does not legally have the ability to restrict the newer aircraft. Although tl~e newer engines are quieter, a large, heavily loaded jet airplane may still be very noticeable. We continue to work with the airline operators to minimize the number of louder aircraft at night. Weather conditions such as fog, or wind from the east may also increase noise levels for you…

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PSCAA Advisory Council Meeting Agenda
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1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]