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maintained, a 4,000 foot length is adequate. This runway could be utilized specifically for training operations and operations by small aircraft exclusively. Keeping a third runway at a shorter length would be less expensive than maintaining three at current lengths. RUNWAY WIDTH Runway 12-30 is currently 150 feet wide, while the other runways are 100 feet wide. FAA and TxDOT standards call for a width of 100 feet to meet ARC D-II standards. If Runway 12-30 were kept as the primary runway, however, it could be more costly to narrow the runway and move the runway lights as opposed to maintaining it at 150 feet. A benefit/cost analysis will need to be done at the time of the next maintenance project to determine if it should be narrowed, especially if this runway is to be extended. The selected crosswind runway should be maintained at a width of 100 feet. If a third runway is kept, it could be reduced to 75 feet to serve small aircraft exclusively. This could be done by simply maintaining and marking the center 75 feet of the runway. RUNWAY PAVEMENT STRENGTH All four runways are constructed of asphalt. Runway 8-26 provides the greatest single wheel gear loading (SWL) strength at 80,000 pounds. Runway 12-30 is strength rated at 60,000 pounds SWL. Runways 4-22 and 17-35 provide much less strength rated at 15,000 pounds SWL and 20,000 pounds SWL, respectively. In order to accommodate corporate and charter general aviation aircraft, the primary runway at the airport should be strength rated at least 75,000 pounds dual wheel gear loading (DWL). The strength of Runways 8-26 and 12- 30 are adequate to meet this requirement. Runways 4-22 and 17-35 would need to be strengthened if either were chosen as the primary or crosswind runway. If a third runway is kept, it should be maintained at 12,500 pounds SWL. RUNWAY SAFETY AREAS The design of airfield facilities includes both the pavement areas to accommodate landing and ground operations of aircraft as well as imaginary safety areas to protect aircraft operational areas and keep them free of obstructions would could affect the safe operation of aircraft at the airport The imaginary safety areas include the: runway safety area (RSA) and object free area (OFA). The FAA defines the OFA as "a two dimensional ground area surrounding runways, taxiways, and taxilanes which is clear of objects except for objects whose location is fixed by function (i.e. airfield lighting)." The RSA is defined as "a defined surface surrounding the runway prepared or suitable for reducing the risk of damage to airplanes in the event of an undershoot, overshoot, or excursion from the runway." Furthermore, the FAA has placed a higher significance on maintaining adequate RSAs at all airports due to 4-7