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<br />category runway length is based upon 100 percent of the general <br />aviation fleet at 60 percent of useful load when the ambient <br />temperature is 1000 F. Cooler temperatures will allow most aircraft <br />to operate at weights substantially heavier than 60 percent. There <br />are also weight limitations imposed by the paving strength design <br />limits which are less than 30,000 pounds in some areas on the <br />airport. <br /> <br />BK.B 3.1 <br />J.UIIH LDGlB RIQJIREMBRTS <br />Runway Category Ienqth (Ft.) * <br />Basic utility (BU) 3,100 <br />General utility (GO) 3,800 <br />(Stage I) <br />General utility (GO) 4,600 <br />(Stage II) <br /> <br />T.ransport (T) (100% fleet @ 60% load) 6,200 <br /> <br />Transport (T) (100% fleet @ 90% load) 9,000 <br /> <br />*Based <Xl elevation 600 I MSL, nomal maxi.Jrun t.elr'p!rature of 9S<1? <br /> <br />Based upa1 forecasts of act! vity and the anticipated mix of aircraft <br />at San Marcos Municipal Ai.J:port, Transport airport criteria has been <br />selected as the long range design standard for the airport. As a <br />result of the variables in aircraft operating weight, field elevation, <br />runway gradient and normal maximum temperature, the runway length <br />required to accommodate 100 percent of the Transport fleet at 90 <br />percent useful load is 9,000 feet. However, it is not economically <br />prudent to desi9I1 the runway to achieve the capability to accommodate <br />a few additional aircraft types1 in view of the rather limited number <br />of additional aircraft that would be accommodated by the additional <br />length, it would not be wise to consider such major construction <br />during the planning period. The existence of such facilities in <br />nearby metropolitan areas places such an improvement in a questionable <br />light. <br /> <br />Table 3.2 below sOOws typical jet aircraft which should be accommo- <br />dated by the San Marcos Municipal facility. <br /> <br />3.2 <br />