Draft EUG Master Plan Update, February 2010

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CHAPTER 6 LANDUSECOMPATIBILITY utilization patterns, and the typical flight tracks of aircraft. Coordination with Airport staff and the FAA, and evaluation of the aviation demand forecasts presented in Chapter 2, provided the necessary information to depict existing and future noise exposure levels at Eugene Airport. Aircraft Fleet Mix Eugene Airport has a diverse fleet mix. Aircraft range from small, single-engine general aviation aircraft such as the Cessna 172 to regional and narrow-body commercial service aircraft like the Canadair CRJ700 and the Boeing 737. The airport also receives a significant number of private corporate turboprop and jet aircraft. Other airport activity includes various military aircraft and general aviation helicopters. The Airport’s fleet mix was provided by Airport staff and supplemented with data from the 2000 Master Plan. Airport Operations The frequency, or total number, of aircraft operations was based on the FAA-approved forecasts contained in Chapter 2 of this Master Plan Update. The total number of operations, with the exception of touch-and-go operations, was divided equally into approach and departure operations. According to Airport staff, touch-and-go operations account for approximately 60 percent of general aviation operations. Daytime-Nighttime Operations The INM assigns “penalties” to nighttime operations because aircraft noise is perceived to be louder at night when ambient sound levels are lower. The proportions of daytime and nighttime activity for commercial operations were based on published flight schedules, while proportions for general aviation and cargo operations were based on discussions with Airport staff. Runway Utilization Runway utilization includes the number, location, and orientation of the active runways, as well as the directions and types of operations that occur on each runway. Runway utilization depends primarily on wind direction and speed, but is also a function of Air Traffic Control (ATC) procedures and separation standards, terminal location, taxiing distances, and runway lengths. Runway utilization percentages were determined based on discussions with Airport staff and supplemented with data from the 2000 Master Plan. Flight Tracks Flight track information represents the path over the ground followed by an aircraft. Because it is not possible to input all of the tracks followed by individual aircraft, the FAA suggests that tracks be consolidated to represent corridors consisting of estimated average flight tracks. Flight track use was determined based on discussions with Airport staff. 2.2.2 Analysis The following exhibits show aircraft noise exposure contours at Eugene Airport, and their relation to the Exhibit 6-4Exhibit 6-5 Airport and surrounding areas. shows contours for 2006 while shows projected contours for 2026. The noise exposure levels for 2026 include increased operations and proposed airfield improvements. 6-11 Eugene Airport Master Plan Update (February 2010)