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<br />the safety of nighttime operations to <br />each runway end (without a more <br />extensive approach lighting system) by <br />providing pilots with the ability to <br />identifY these runway ends and <br />distinguish this lighting from other <br />lighting on the airport and in the <br />approach areas. REILs are presently <br />installed at end of Runway 8 and 26. <br />REILs should be planned for both ends <br />ofthe crosswind runway. If Runway 30 <br />is upgraded to a MALSR, the REIL <br />would not be required, however, <br />consideration should be given to <br />installing REILs until a precision GPS <br />approach is approved for the runway. <br /> <br />HELIP AD <br /> <br />There is no designated helipad at the <br />airport. Future facility planning should <br />include providing a helipad with a <br />separa te tiedown position to <br />accommodate the parking needs of <br />transient and based helicopter parking. <br />This should also include installing edge <br /> <br />lighting on the helipad for easier <br />identification of the helipad at night. <br />Proper markings should be maintained <br />through the planning period. <br /> <br />AIR TRAFFIC <br />CONTROL TOWER <br /> <br />The establishment of a new FAA funded <br />air traffic control tower follows a two- <br />phase process as detailed in F.AA <br />Handbook 7031.2C, Airway Planning <br />Standard Number One - Terminal Air <br />Navigation Facilities and Air Traffic <br />Control Services. The first phase <br />involves identifYing possible candidacy <br />through an analysis of annual operation <br />levels. The second phase involves a <br />cost-benefit analysis of the tower <br />location over a 15-year time frame. To <br />be identified as a possible candidate for <br />a new air traffic control tower, the sum <br />ofthe following formula must be greater <br />than or equal to one. The formula is as <br />follows: <br /> <br />AC+ AT+ GAl + GAL + MI+ ML= X <br />38,000 90,000 160,000 280,000 48,000 90,000 <br /> <br />Where: <br /> <br />AC = <br />AT = <br />GAl = <br />GAL = <br />MI = <br />ML = <br /> <br />Air Carrier Operations <br />Air Taxi Operations <br />General Aviation Itinerant Operations <br />General Aviation Local Operations <br />Military Itinerant Operations <br />Military Local Operations <br /> <br />U sing forecast activity data prepared in <br />Chapter Two, it is expected that San <br />Marcos Municipal Airport would qualifY <br />as a possible candidate for an air traffic <br />control tower due to levels of air traffic <br />at the airport. At short term planning <br /> <br />horizon activity levels, the sum of the <br />formula above is 0.65. For the <br />intermediate term the sum is 0.75. At <br />long term planning horizon levels, the <br />sum 0.99. <br /> <br />3-14 <br />