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AIRPORT MASTER PLAN <br />TABLE 4-2 <br />GENERALIZED RUNWAY LENGTH REQUIREMENTS BASED ON AC 150/5325-4B <br />SAN MARCOS REGIONAL AIRPORT <br />Current Runway <br />Aircraft CategoryRunway Runway Length <br />DesignationLengthRequirementDeficiency <br />Small Aircraft: 12,500 pounds or <br />less: <br />13/315,6012,201 <br />95% GA Fleet3,400 <br />8/266,3302,930 <br />17/355,2141,814 <br />13/315,6011,601 <br />100% GA Fleet4,000 <br />8/266,3302,330 <br />17/355,2141,214 <br />13/315,6011,201 <br />100% GA Fleet with 10 or more <br />4,400 <br />8/266,3301,930 <br />passenger seats <br />17/355,214814 <br />Large Aircraft between 12,500 <br />and 60,000 pounds: <br />13/315,601 5,047 554 <br />75% of fleet at 60% useful load <br />8/266,330 4,928 1,402 <br />17/355,214 5,045 169 <br />13/315,601 7,547-1,946 <br />75% of fleet at 90% useful load <br />8/266,330 7,428-1,098 <br />17/355,214 7,545-2,331 <br />13/315,601 6,147-546 <br />100% of fleet at 60% useful load <br />8/266,330 6,028 302 <br />17/355,214 6,145-931 <br />13/315,601 9,697-4,096 <br />100% of fleet at 90% useful load 8/266,330 9,578-3,248 <br />17/355,214 9,695-4,481 <br /> <br />Source: AC 150/5325-4B Figures 2-1, 2-2, 3-1 and 3-2. Generalized length only. Actual lengths should be <br />passengers, and cargo. Calculati airport elevation, mean maximum daily <br />temperature of 97elevation differences for HYI are as follows: RWY 8/26 7.8 feet, RWY <br />13/31 19.7 feet, RWY 17/35 19.5 feet. Figures are increased 10 feet for each foot of elevation difference <br />between high and low points of runway centerline. <br />Based on this analysis, there are likely times during the year when the stage length <br />and/or payload of certain aircraft would be limited when operating from the San <br />Marcos Regional Airport. This is primarily a concern with Runway 17/35 and <br />Runway 13/31 as they are the shorter of the three runways and are the runways <br />used most frequently due to their wind coverage. However, the majority of the <br />large aircraft departing from San Marcosare flying to locations within the <br />continental United States and, consequently, are likely not required to depart the <br />Facility Requirements Chapter Page 5of 70 <br />October 2020 <br /> <br />