StART Dec 11 2019 presentation two

• Two Noise Abatement Departure Profiles (NADPs) are followed domestically and internationally: the Close-in and Distant departure profiles • A Close-in NADP is more beneficial in abating noise in areas closer to the runway end; while a Distant NADP is more beneficial in abating noise in areas farther down the departure corridor • A Distant NADP appears to provide the most benefits to the developed areas in the SEA environs Key Points esassoc.com PORT OF SEATTLE Presentation Overview • Introduction • Background on Abatement Departure Profiles • Review the SEA NADP Noise Analysis Results • Recommendations • Respond to Questions from StART Members esassoc.com PORT OF SEATTLE • To determine the NADPs currently in use at Seattle-Tacoma International Airport (SEA), ESA surveyed five airlines operating Boeing 737-800s at SEA • The existing NADPs were normalized to Stage Length 4 conditions and aircraft noise exposure was modeled using the Aviation Environmental Design Tool (AEDT) • ESA compared the Sound Exposure Level (SEL) Contours and Grid Point values for the Close-In and Distant NADPs for four runway ends: 16L, 16C, 34R, and 34C • The analysis identified a preferred NADP for use at SEA Introduction esassoc.com PORT OF SEATTLE • After the technical work was completed and presented to the StART Working Group on October 14, 2019, Delta Air Lines conducted a internal review of its response to the NADP Survey • As a result of that review, Delta Air Lines determined that its survey response incorrectly reflects the NADP that it…

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Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
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 [...]