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• • Indian River County I Impact Fee Update Study n umber of employees, since the service -demand characteristics can vary considerably by type of industry. Functional population is the equivalent number of people occupying space within a community on a 24 -hour -day, 7 -days -a -week basis. A person living and working in the community will have the functional population coefficient of 1.0. A person living in the community but working elsewhere may spend only 16 hours per day in the community on weekdays and 24 hours per day on weekends for a functionaipopulation coefficient of 0.76 (128-hourpresence divided by168 hours in one week VA person commuting into the ,e4 erf county to work five days per week would have a functional population coefficient of 0.30 ? (50 -hour presence divided by 168 hours in one week). Similarly; a person traveling into the community to shop at stores, perhaps averagiaours per week would have a functional population coefficient of 0.05. Functional population thus tries to capture the. presence of all peop.fe within the community, whether residents, workers;;or visitors, to<arrive at a total estimate of effective population need to be served. This form of adjusting population tohelp measure real facility needs replaces the population approach of merel weighting. r• esidents two -,thirds and workers one-third • OCAV (Nelson and Nicholas 1992) By `estimating theyfunctional and weighted population per unit of land use.across all majorr, certainbfacilitiesand uses ,in a community, an estimate of the demand for the present and future year can be calculated. The following paragraphs explain how functional population is calculated for residential and n on-residential land uses. ars Residential Functional Population �;..., Developing the residential component of functional population is simpler than developing the non-residential component. It is generally estimated that people spend one-half to yew three-fourths of their time at home and the rest of each 24-hour day away from their place of residence. In developing the residential component of the Indian River County functional population, an analysis of the County s population and employment characteristics was conducted. Based on this analysis, it was estimated that people, on average, spend 16.4 hours, or approximately 68 percent, of each 24-hour day at their place of residence and the other 32 percent away from home. This analysis is presented in Tables A-5 and A-6. Tindale -Oliver & Associates, Inc. January 2014 Indian River County A-5 Impact Fee Update Study