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<br />Using the specific data for San Marcos <br />Municipal Airport described above, <br />runway length requirements for the <br />various classifications of aircraft that <br />may operate at the airport were <br />examined using the FAA Airport Design <br />computer program Version 4.2D which <br />groups general aviation aircraft into <br /> <br />TABLE3B <br />Runway Length Requirements <br />San Marcos Municipal Airport <br /> <br />several categories, reflecting the <br />percentage of the fleet within each <br />category and useful load (passengers <br />and fuel) of the aircraft. Table 3B <br />summarizes FAA recommended runway <br />lengths for San Marcos Municipal <br />Airport. <br /> <br />AIRPORT AND RUNWAY DATA <br /> <br />Airport elevation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597 feet <br />Mean daily maximum temperature of the hottest month . . . . . . . . . . . . .. 94.7 F <br />Maximum difference in runway centerline elevation ................. 20 feet <br />Length of haul for airplanes of more than 60,000 pounds ......... 1,000 miles <br />Dry runways <br /> <br />RUNWAY LENGTHS RECOMMENDED FOR AIRPORT DESIGN <br /> <br />Small airplanes with less than 10 passenger seats <br />75 percent of these small airplanes. . . . . . . . . . . . . . . . . . . . .. 2,800 feet <br />95 percent of these small airplanes . . . . . . . . . . . . . . . . . . . . .. 3,300 feet <br />100 percent of these small airplanes . . . . . . . . . . . . . . . . . . . . .. 4,000 feet <br />Small airplanes with 10 or more passengers seats ................ 4,500 feet <br /> <br />Large airplanes of 60,000 pounds or less <br />75 percent of business jets at 60 percent useful load <br />75 percent of business jets at 90 percent useful load <br />100 percent of business jets at 60 percent useful load <br />100 percent of business jets at 90 percent useful load <br /> <br />5,000 feet <br />7,300 feet <br />6,000 feet <br />9,500 feet <br /> <br />Airplanes of more than 60,000 pounds. . . . . . . . . . . . . . . . . . . . . . . . .. 6,200 feet <br /> <br />REFERENCE: FAA's airport design computer software utilizing Chapter Two of <br />AC 150/5325-4A, Runway Length Requirements for Airport <br />Design., no changes included. <br /> <br />As mentioned previously, the current <br />critical design aircraft for Runway 12- <br />30 fall within ARC C-II. This is based <br />upon a 250 operational level by typical <br />corporate aircraft, depicted in Table <br /> <br />3C, that now use the airport. Ultimate <br />planning will be considered for all <br />corporate general aviation aircraft up to <br />ARC D-II. The appropriate F AArunway <br />length planning category for aircraft <br /> <br />3-7 <br />