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CHAPTER 5. DEMANDCAPACITY ANALYSIS Based on the forecast potential passenger traffic, aircraft operations, and based aircraft an analysis has been conducted for the purpose of determining the required airfield development to accommodate the forecast traffic. A. Runways F Runway'11 L-29R is the major runway with full IFR capability. This runway is currently 150 feet wide by 8,650 feet long with,a'4,000-foot extension beyond the threshold to Runway l IL. This 1,000 feet cannot be used for landing on Runway I IL because of the proximity of Arch-Airport Road off the end of the runway. Current activity and forecast activity for air cargo indicate the need for longer runways in order that long-haul cargo jet aircraft can operate from this airport without intermediate stops for fuel. The longer length runway is needed for takeoff. The existing runway is adequate for landing. The proximity of Highway 99 to the current end of Runway 29R and of Arch-Airport Road to the threshold of Runway 11L limits the length of this runway without major relocations of primary roads. By extending the runway 1,000 feet westerly beyond the threshold of Runway I IL and 1,000 feet easterly beyond the threshold of Runway 29R, longer take-off distances can be realized and by the use of declared distances cargo aircraft will be able to operate longer stage lengths from this airport. If these 1,000-foot extensions are constructed on each end of the runway,then the declared distances for departures from each runway!will be as shown below: r. DECLARED,DISTANCES Runway IIL-29R - Ultimate Runway Development 11 L Departures 29R Departures TORA 9,600' . 10,037' TODA 10,600'. 11,037' ASDA 9,690' 9,701' LDA 8,690°X 8,701' k i In order to fully utilize these- declared distances it will be necessary to construct blast walls beyond the end of each runway extension adjacent to Highway 99 and Arch-Airport Road to protect vehicular traffic on these roads. With the forecast increase in aircraft operations at this airport a parallel runway will be required. The existing parallel runway is only 500 feet centerline to centerline spacing from the main Runway 11 L-29R. It is recommended that the existing short parallel runway be abandoned and replaced with.a°new parallel runway located 700 feet centerline to centerline spacing in order to allow simultaneous operations from the two runways. It is further recommended that the relocated runway be 100 feet wide by 6,000 feet long so that commercial turbo jet aircraft can-,utilize this runway on a temporary basis when maintenance work is being conducted on Runway IIL-29R and so that business jet aircraft can utilize the short parallel runway and provide relief for the main instrument runway. 5-1