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FACILITY REQUIREMENTS on the secondary runway to separate commercial and general aviation operations. It was explained that because of the very large speed differentials between small general aviation aircraft and jet aircraft, safety is dramatically enhanced by the separation of traffic provided by Runway 16L-34R. The EUG ATCT controllers expressed that overall, the secondary runway provides great benefit in ensuring safe and efficient operations. As such, it was determined Runway 16L-34R must be maintained at a design level that allows for similar utilization as is provided today. Runway 16L currently has a RDC of D-III-1600 and Runway 34R of D-III-4000. These design standards are recommended to be maintained though the planning period to ensure that the secondary runway provides the EUG airfield system the same amount of safety and efficiency as offered today. 3.5.3.2Runway Designation Runway designations provided on each runway indicate the runway orientation according to the magnetic compass bearing. Runway designations can change due to the slow drift of the magnetic poles on the Earth's surface, which over time change the runway’s magnetic bearing. Magnetic declination relates to the degree of drift that must be accounted for. Depending on an airport’s location and how much drift takes place, it may be necessary to change the runway designation. It is recommended that runway designations be changed if there is more than a 5 degree difference from the runway’s true bearing. As of November 23, 2016, the magnetic declination at the Airport is 15° 11’ E and it was changing by 0° 7’ W per year. As illustrated in Table 3-5, Both Runway 16R-34L and Runway 16L-34R have magnetic bearings greater than a 5 degree tolerance during the planning period. As such, the runways will require re-designation within the planning period in the year 2023. TABLE 3-5 RUNWAY DESIGNATION ExistingFuture (2035) RunwayRunwayTrueMagneticMagneticRunwayRunway DesignationHeadingBearingBearingBearingHeadingDesignation Runway 16R163°179° 22' 12"164° 11' 24"166° 44' 57"166°Runway 17R Runway 34L343°359° 22' 12"344° 11' 24"346° 44' 57"346°Runway 35L Runway 16L163°179° 23' 24"164° 12' 36"166° 45' 69"166°Runway 17L 343° Runway 34R359° 23' 24"344° 12' 36"346° 45' 69"346°Runway 35R Source: NOAA - National Centers for Environmental Information, RS&H Analysis, 2016 3.5.3.3Runway Length Requirements Runway length is determined by the greater requirement of the takeoff or landing performance characteristics of the existing and future design aircraft, or the composite family of airplanes as represented by the design aircraft. The takeoff length, including takeoff run, takeoff distance, and accelerate-stop distance, is typically the more demanding of the runway length requirements. EUGENE AIRPORT MASTER PLAN 3-9