Request Letter to Modify Aircraft Routes to FAA 2019

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L Cityof Louisville COLORADO • SINCE 1878 Administrator Steve Dickson Federal Aviation Administration 800 Independence Avenue, SW Washington DC, 20591 RE: City of Louisville, Colorado — Requests to modify aircraft routes September 24, 2019 Dear Administrator Dickson, Office of the Mayor On behalf of the Louisville City Council and residents, we are reaching out in regard to the air flight noise pollution problem over Louisville, Colorado and other parts of Boulder County. The current noise levels negatively affect the public health and environment of those living in the impacted areas. While we are aware there have been opportunities to provide feedback through the EA process, and that the Federal Aviation Administration (FAA) has submitted its proposal as to how to address these issues, we do not believe the FAA proposal adequately solves the noise problem. As such, we are writing to advocate that the following two recommendations be adopted and implemented: 1. Shift the RALFI waypoint (east of Boulder on the ZIMMR flight path) approximately 0.7 nautical miles south; and shift the IPALE waypoint (on the COORZ flight path south of the RALFI) approximately 0.7 nautical miles south. This is made possible by reducing the departure angle between COORZ and CONNR from 17 degrees to 15 degrees. 2. Shift the ZIMMR another 1.3 miles south (for a total southward shift of 2 miles for ZIMMR). This would then involve shifting the COORZ, CONNR and BAYLR flight paths 1.3 miles south. It is our belief, and those of the experts with whom we have consulted, that these small changes would make a significant difference in alleviating the jet noise problem over the City of Louisville and other parts of Boulder County. Sincerely, Robert P. Muckle Mayor 749 Main Street I Louisville CO 80027 303.335.4533 (phone) ,303,335.4550 (fax) www.louisvilleco.gov