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Comprehensive Plan Public School Facilities Element Student Generation Multiplier A critical component of the school concurrency process is projecting the number of students that will be generated from new residential development. In order to calculate the number of students associated with new residential development, a student generation multiplier was created. Because the number of students living in a housing unit varies depending on the type of residential housing, the student generation rate per residential unit is based on three housing types: single family, multi -family, and mobile home. Two key pieces of data were used to calculate student generation rates. These were the Geographic Information System (GIS) parcel file from the Indian River County Property Appraisers office with associated land use and attribute data (2005), and the GIS Point file based on the October 2005 FTE Survey data provided from the School District (for the school year 2005-2006). A spatial join was applied to these key files resulting in one database with a common location. Once the data were joined, the student GIS Point file was assigned a housing type based on the closest proximity of a residential parcel to the GIS centerline point. As a 100 percent student inventory (not a sample set), the volume of data used (16,857 geo- coded students) was large enough to offset occasional land use assignment errors. The student database was then sorted by grade and housing type. To calculate a student generation rate (multiplier), the total number of students (by school type) was divided by the total number of occupied dwelling units by residential type. Table 12.5a shows the number of students by residential housing type and school type in Indian River County as of the October 2005 student count. The occupied dwelling unit counts are based on an average 90 percent occupancy rate. The occupancy rate was determined by dividing permanent 2005 Bureau of Economic and Business Research (BEBR) households by the 2005 Metropolitan Planning Organization (MPO) housing unit count. The student generation multipliers by residential housing type were derived from the "Indian River County Student Generation Rates by Housing Type" report prepared by Fishkind and Associates, Inc. (May 24, 2006). Consequently, the number of students associated with a development can be calculated by applying the multiplier to the development's proposed number and type of residential housing units. The projected number of students is the product of the development units multiplied by the student generation multiplier for the unit type. Community Development Department Indian River County 7