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Immediate positive economic benefits will result <br />from construction of the airport. A recent study <br />authored by D.M. Brown, Chairman of Georgetown <br />University's economics department concludes that <br />each dollar spent for construction generates $2.80 <br />in economic activity. <br />The General Aviation Manufacturers Association <br />(GAMA) developed a methodology to determine the <br />economic impact of an airport in a community.* The <br />study provides an abbreviated method for deter- <br />mining a portion of the economic benefits derived <br />from an airport. This method results in a conser- <br />vative figure, since it is based solely on arriving <br />transient passengers. <br />The potential economic impact derived from Gateway <br />North Industrial was determined using the GAMA <br />method and applied to forecast itinerant <br />operations. Briefly, the methodology consists of <br />four steps as follows: <br />1. Determine Annual Non -based Itinerant Aircraft <br />Arrivals (assume 50% of itinerant arrivals are <br />non -based). <br />2. Multiply by 3.2 the <br />3. Multiply by $50.00, <br />ture per visitor. <br />Result: Direct dollar impact <br />average passenger load. <br />the average daily expendi- <br />of visitors. <br />4. Multiply result by four, the cyclic multiplier <br />within a local economy estimated by the U.S. <br />Chamber of Commerce. <br />Result: Total annual economic impact of visitors. <br />*"The Economic Importance of Airports and General Aviation" <br />8-6 <br />