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Future planning for Runway 12-30 should consider providing up to 7,000 feet. This length would better situate the San Marcos Municipal Airport to serve the range of business jet aircraft on a regular basis. In order to fully accommodate ARC B-II aircraft, the appropriate planning category for the crosswind runways is "small airplanes with 10 or more passenger seats." As shown in Table 3B, a runway length of 4,500 feet is recommended for this category. All crosswind runways currently exceed this minimum requirement. TxDO,!, Polices and Standards indicates that a crosswind runway should have a length of at least 80 percent of the primary runway length. If Runway 12-30 were extended to 7,000 feet, at least one crosswind runway should be at least 5,600 feet long. Alternative analysis, to be conducted in the next chapter, will consider extending Runway 12-30 up to 7,000 feet and ensure that at least one crosswind runway provide 5,600 feet. RUNWAY WIDTH Runway width is based upon the planning ARC for each runway. For ARC D-II, the FAA specifies a runway width of 100 feet. TxDOT's Policies and Standards indicates that a Transport Airport should provide a runway width of 100 feet. The existing width of Runway 12-30, at 150 feet, exceeds FAA and TxDOT requirements. All other crosswind runways are currently 100 feet wide, exceeding this minimum requirement. While consideration could be given to reducing the width of Runway 12-30 to 100 feet (ARC D-II) and the crosswind runways to 75 feet (ARC B-II), the cost to reconstruct these runways at 100 and 75 feet (which would require relocating all the existing runway lighting) would need to be compared to the cost to reconstruct them at 100 and 75 feet. It should also be noted that maintaining a crosswind runway at a width of 100 feet will better suite the runway to accommodate the airport's traffic when the primary runway is closed. RUNWAY PAVEMENT STRENGTH The most important feature of airfield pavement is its ability to withstand repeated use by aircraft of significant weight. At the airport, this includes a wide range of general aviation aircraft ranging from small single-engine aircraft to business jet aircraft. Runway 12-30 presently has a single wheel loading (SWL) strength of60,000 pounds. Runway 4-22 has a pavement strength rating of 15,000 pounds SWL; Runway 8-26 has 80,000 pounds SWL; and Runway 17-35 has 20,000 pounds SWL. TxDOT's Policies and Standards indicates a mImmum pavement strength of 30,000 pounds SWL for general aviation transport and reliever airports. These pavement strengths ratings are sufficient to serve the expected mix of aircraft to use the airport through the planning period. TAXIWAYS Taxiways are constructed primarily to facilitate aircraft movements to and from the runway system. Some 3-9