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r DEC - 7 1001 <br />BOOK 91 uv 138 <br />runoff volume, based on that amount of impervious surface and the <br />25 year/24 hour design storm, would be approximately 4,356,000 <br />cubic feet. In order to maintain the county's adopted level of <br />service, the applicant would be required to retain approximately <br />217,800 cubic feet of runoff on-site. With the soil <br />characteristics of the subject property, it is estimated that the <br />pre -development runoff rate is 245 cubic feet/second. <br />Based upon staff's analysis, the drainage level of service <br />standards would be met by limiting off-site discharge to its pre - <br />development rate of 245 cubic feet/second and requiring retention <br />of the 217,800 cubic feet of runoff for the most intense use of the <br />property. <br />As with all development, a more detailed review will be conducted <br />during the development approval process. <br />- Recreation <br />A review of county recreation facilities and the projected demand <br />that would result from the most intense development that could <br />occur on the property under the proposed amendment indicates that <br />the adopted levels of service would be maintained. The table below <br />illustrates the additional park demand associated with the proposed <br />development of the property and the existing surplus acreage by <br />park type. <br />The concurrency requirements for drainage, solid waste, water, and <br />parks have been met for the proposed amendment. With the execution <br />of the referenced developer's agreements for roads and wastewater, <br />the concurrency test will be satisfied for the subject request. <br />Impact on the Residential Allocation Ratio <br />Of particular importance to this request is the impact of the land <br />use change on the county's residential allocation ratio. A <br />residential allocation ratio is the measure of total residential <br />units allowed under the land use plan compared to the number of <br />residential units expected to be needed through the plan's planning <br />horizon, based on population projections. The following formula is <br />used to calculate the residential allocation ratio: <br />Total number of units allowed - Existing units <br />Projected number of units needed (1990-2010) <br />When Indian River County and the State Department of Community <br />Affairs (DCA) entered into a stipulated settlement agreement to <br />bring the county's plan into compliance with state requirements, <br />both parties agreed to a residential allocation ratio. Given the <br />agreed upon ratio, the county's residential land use designations <br />were acceptable to DCA. Subsequently, the stipulated settlement <br />agreement was implemented through an amendment to the county's <br />comprehensive plan. That amendment, which was found in compliance <br />36 <br />LOS <br />Project <br />(Acres per <br />Demand <br />Surplus <br />Park Type <br />1000 population) <br />Acres <br />Acreage <br />Urban District <br />5.0 <br />5.48 <br />206.154 <br />Community (north) <br />3.0 <br />3.29 <br />24.715 <br />Beach <br />1.5 <br />1.65 <br />72.246 <br />River <br />1.5 <br />1.65 <br />33.243 <br />The concurrency requirements for drainage, solid waste, water, and <br />parks have been met for the proposed amendment. With the execution <br />of the referenced developer's agreements for roads and wastewater, <br />the concurrency test will be satisfied for the subject request. <br />Impact on the Residential Allocation Ratio <br />Of particular importance to this request is the impact of the land <br />use change on the county's residential allocation ratio. A <br />residential allocation ratio is the measure of total residential <br />units allowed under the land use plan compared to the number of <br />residential units expected to be needed through the plan's planning <br />horizon, based on population projections. The following formula is <br />used to calculate the residential allocation ratio: <br />Total number of units allowed - Existing units <br />Projected number of units needed (1990-2010) <br />When Indian River County and the State Department of Community <br />Affairs (DCA) entered into a stipulated settlement agreement to <br />bring the county's plan into compliance with state requirements, <br />both parties agreed to a residential allocation ratio. Given the <br />agreed upon ratio, the county's residential land use designations <br />were acceptable to DCA. Subsequently, the stipulated settlement <br />agreement was implemented through an amendment to the county's <br />comprehensive plan. That amendment, which was found in compliance <br />36 <br />