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19 <br /> Lot size requirements would be the same as discussed in the item above. The State mandate <br /> subjects any use which is not residential in nature to the non-residential impervious surface <br /> provisions. <br /> 7. When will BMP's (wetwater detention basins) be required? <br /> Upper Eno and Back Creek Watersheds <br /> BMPs will be required for: <br /> New residential developments which exceed 1 dwelling unit per acre and 12% <br /> impervious surface. <br /> New non-residential projects which exceed 12% impervious surface <br /> Lower Eno Watershed <br /> BMPs will be required for: <br /> New residential developments which exceed 3 dwelling units per acre and 36% <br /> impervious surface (without curb and gutter). <br /> New residential developments which exceed 2 du/acre and 24% impervious surface <br /> (with curb and gutter). <br /> New non-residential projects which exceed 36% impervious surface(without curb and <br /> gutter). <br /> New non-residential projects which exceed 24% impervious surface (with curb and <br /> gutter). <br /> All Other Watersheds <br /> BMPs will not be required. <br /> 8. What advantages and disadvantages result from establishment of an interim five-acre <br /> lot size standard in Cane Creek Watershed? <br /> Advantages <br /> Greater watershed protection would be provided pending the outcome of the Cane <br /> Creek Study. <br /> OWASA and Chapel Hill recommend the higher standards. <br /> OWASA has made a significant investment in the Cane Creek Reservoir. <br />