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Baof 96 prE 625 In order to maintain the county's adopted level of service, the applicant would be required to retain approximately 436,152 cubic feet of runoff on-site. With the soil characteristics of the subject property, it is estimated that the pre -development runoff rate is 96.05 cubic feet/second. Based upon staff's analysis, the drainage level of service standard would be met 'by limiting off-site discharge to the IRFWCD's maximum discharge rate of two inches in twenty-four hours, and requiring retention of the 436,152 cubic feet of runoff for the most intense use of the property. As with all development, a more detailed review will be conducted during the development approval process. - Recreation A review of county recreation facilities and the projected demand that would result from the most intense development that could occur on the property under the proposed amendment indicates that the adopted levels of service would be maintained. The table below illustrates the additional park demand associated with the proposed development of the property and the existing surplus acreage by park type. LOS Project (Acres per Demand Surplus Park Time 1000 population) Acres Acreage Urban District 5.0 1.69 180.818 Community (south) 1.25 0.42 8.054 Beach 1.5 0.51 64.645 River 1.5 0.51 25.642 Based upon the analysis conducted, staff has determined that all concurrency -mandated facilities, including drainage, roads, solid waste, recreation, water, and wastewater have adequate capacity to accommodate the most intense use of the subject property under the proposed amendment. Therefore, the concurrency test has been satisfied for the subject request. Impact on the Residential Allocation Ratio Of particular importance to this request is the impact of the land use change on the county's Residential Allocation Ratio (RAR). A RAR is the measure of total residential units allowed under the land use plan compared to the'number of residential units expected to be needed through the plan's planning horizon, based on population projections. In 1990, when the comprehensive plan was adopted, it allowed over 119,000 units. In this case, the proposed amendment would increase the maximum number of residential units allowed on the site by 37. That increase would have an insignificant impact on the county's RAR. More than off -setting the 37 unit increase that would occur with the proposed amendment is the reduction in build -out units that has resulted from land use plan amendment approvals since plan adoption. Since plan adoption, several land use amendments involving residentially designated land within the urban service area have been approved. The effect of these amendments has been a net decrease of 1,169 units in the county's build -out projection. The following table depicts the information used to determine the change in the number of units. Since the C/I, RC, and C-1 designations are not intended for residential uses, land use amendments redesignating land from residential to C/I, RC, or C-1 reduce the number of units allowed. Similarly, land use amendments redesignating land from one type of residential to a lower density residential reduce the number of units allowed. NOVEMBER 21, 1995 22