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- Drainage BOOK 91 Fa GF 940 All developments are reviewed for compliance with county stormwater regulations which require on-site retention, preservation of floodplain storage and minimum finished floor elevations. In addition, development proposals must meet the discharge requirements of the county Stormwater Management Ordinance. The subject property is located within the R-2 Drainage Basin. Therefore, development on the site would be prohibited from discharging any runoff in excess of the pre -development rate. In this case, the minimum floor elevation level of service standard applies, since the property lies within a floodplain. Consistent with Drainage Policy 1.2, "all new buildings shall have the lowest habitable floor elevation no lower than the elevation of the 100 - year flood elevation as shown on the Federal Emergency Management Agency's Flood Insurance Rate Map, or as defined in a more detailed study report." Since the subject property lies within Flood Zone AE, which is a special flood hazard area located within the 100 - year floodplain, any development on this property must have a minimum finished floor elevation of no less than 6 feet above mean sea level. Besides the minimum elevation requirement, on-site retention and discharge standards would apply to any development on the subject property. With the most intense use of this site under the proposed zoning, the maximum area of impervious surface will be approximately 48,134 square feet, or.l.l acres. The maximum runoff volume, based on that amount of impervious surface and the 25 year/24 hour design storm, will be approximately 55,662 cubic feet. In order to maintain the county's adopted level of service, the applicant will be required to retain approximately 10,244 cubic feet of runoff on-site. With the soils characteristic of the subject property, it is estimated that the pre -development runoff rate is 4.7 cubic feet/second. Based upon staff's analysis, the drainage level of service standard will be met by limiting off-site discharge to the site's pre - development rate of 4.7 cubic feet/second, requiring retention of 10,244 cubic feet of runoff for the most intense use of the property, and requiring that all finished floor elevations exceed 6 feet above mean sea level. As with all development, a more detailed review will be conducted during the development approval process. - Recreation Recreation concurrency requirements apply only to residential development. Therefore, this rezoning request would not be required to satisfy recreation concurrency requirements. Based upon the analysis conducted, staff has determined that all concurrency -mandated facilities, including drainage, roads, solid waste, water, and wastewater, have adequate capacity to accommodate the most intense use of the subject property under the proposed zoning. Therefore, the concurrency test has been satisfied for the subject request and staff has issued a conditional concurrency certificate to the applicant. Consistency with Comprehensive Plan Rezoning requests are reviewed for consistency with all policies of the Comprehensive Plan. Rezoning requests must also be consistent with the overall designation of land uses as depicted on the Future Land Use Map; these uses include agricultural, residential, recreational, conservation, and commercial and industrial land uses and their densities. Commercial and industrial land uses are located in nodes throughout the unincorporated areas of Indian River County. The goals, -objectives and policies are the most important parts of the Comprehensive Plan. Policies are statements in the plan which identify actions which the county will take in order to direct the community's development. As courses of action committed to by the county, policies provide the basis for all county land development 38