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133 <br /> items that must be addressed at the November Public <br /> Hearing. One is some adjustments to the Back Creek <br /> Watershed which affect the impervious surface limits <br /> and lot size. There are also some clean-up items <br /> for the non-residential zoning lots' in Little <br /> River and Cedar Grove Townships . <br /> Willis summarized the comments and issues report. <br /> This information is an attachment to these minutes <br /> on pages . This information is all <br /> consistent with that presented at public hearing on <br /> August 23, 1993 . <br /> One issue is the recommended lot size and impervious <br /> surface limits for the Little River and Flat River <br /> Watersheds which are significantly more restrictive <br /> than the State mandate. The higher standards were <br /> proposed in response to the recommendations of a <br /> technical study prepared for the Lake Michie and <br /> Little River reservoirs. Also, in 1990, Orange <br /> County adopted standards for University Lake <br /> Watershed in response to recommendations of a <br /> technical study performed for that watershed. For <br /> these reasons, the Planning Staff originally <br /> recommended adoption of a higher standard that that <br /> required by the State mandate. <br /> Willis continued that the State mandate requires a <br /> minimum lot size or impervious surface limit, but <br /> not both. To assure that reasonable development <br /> could still occur on existing lots, impervious <br /> surface on existing lots has been calculated in <br /> accordance with a sliding scale. The percentage of <br /> impervious surface increases as lot size decreases. <br /> The Planning Staff proposes that the existing <br /> sliding scale be revised to provide for a 12% <br /> impervious surface ratio for one-acre lots <br /> (consistent with the 1-acre lot size/12% impervious <br /> surface option offered by the State mandate) , and a <br /> 6% impervious surface ration for 5-acre lots <br /> (consistent with the current requirements for <br /> existing lots in the University Lake Watershed) . <br /> The revised scale would allow less impervious <br /> surface than the existing sliding scale. The <br /> greatest change would occur in 1 .0 acre lots, which <br /> would decrease from 14% to 12% impervious surface. <br /> As the lots size approaches five acres, the <br /> differences diminish. For lot sizes between five <br /> and six acres, the impervious surface ratios of the <br /> revised scale range from . 15% to .50 % less than the <br /> current scale. <br /> Currently, gravel roads and driveways are not <br />