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<br />Generally, AlA's can be expected to <br />reach two percent of annual itinerant <br />operations. In 1992 (only operational <br />statistics available for the period at San <br />Marcos), AlA's reached 1.54 percent of <br />annual itinerant operations. Future <br /> <br />AlA projections have been made at two <br />percent of annual itinerant operations. <br />Thus, AlA's have been projected to <br />reach 1,600 by the long term. Table 2J <br />presents AlA forecasts for the planning <br />period. <br /> <br />TABLE2J <br />Annual Instrument Approaches (AlA) Projections <br />San Marcos Municipal Airport <br />Year AlA's Itinerant Operations Ratio <br />1991 190 N/A ------- <br />1992 269 17,480 1.54% <br />1993 352 N/A ------- <br />1994 378 N/A ------- <br />1996 257 N/A ------- <br />1997 563 N/A ------- <br />1998 463 21,717 2.13% <br />1999 440 39,076 1.13% <br />2000 338 36,800 0.92% <br />PLANNING HORIZON FORECASTS <br />Short Term 1,046 52,300 2.00% <br />Intermediate 1,170 58,500 2.00% <br />Long Range 1,600 80 000 2.00% <br /> <br />SUM1VlARY <br /> <br />This chapter has outlined the various <br />aviation demand levels anticipated for <br />the next 20 years at San Marcos <br />Municipal Airport. Long term growth <br />at the airport will be influenced by <br />many factors including the local <br />economy, the need for a viable aviation <br />facility in the immediate area and <br />trends in general aviation at the <br />national level. <br /> <br />The next step in the master planning <br />process will be to assess the capacity of <br />existing facilities, their ability to meet <br />forecast demand, and to identify <br />changes to the airfield and/or landside <br />facilities which will create a more <br />functional aviation facility. The <br />aviation demand forecasts for San <br />Marcos Municipal Airport through the <br />long term planning horizon are <br />summarized on Exhibit 2C. <br /> <br />2-21 <br />