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23 <br /> Slide#24 <br /> c)Review the differences between watersheds and how that impacts what can be built or operate within <br /> them.(continued) <br /> Pam° Residential Impervious Surface <br /> Area Limits <br /> • Defined in UDO Section 4.2.5 <br /> • Towns have their own limits <br /> • Dark green WPODs have lowest <br /> allowable impervious(6%) <br /> °w•i Em <br /> • For UNIV and CANE protected <br /> "ta;• <br /> areas,we are stricter than the <br /> state's required 12% limit <br /> • The"10/70"rule is applied in our <br /> two Economic Development <br /> Districts (EDDs) <br /> wa�a�;oy Hillsborough EDD(50%max) <br /> P.W P.. �cln emus <br /> Ci Er, Buckhorn-Mebane EDD <br /> Ilan Prcer versiy Ilapervbue gYtlace lMYla <br /> Protautetl tiel °a�`;11 (ResltlentlaQ 1 <br /> ORANGE COUNTY <br /> E—Ptim Eo . 24. NORTH CAROLINA <br /> Christopher Sandt said the darkest green color indicates the watersheds with the most <br /> restrictive impervious area restrictions. He said only 6% of a parcel may be impervious there. <br /> Next, the medium green areas are 12%. He noted that the state requires only a 12% limit. <br /> Commissioner McKee said the 6% impervious surface restriction creates a hardship for <br /> anyone who is stressed financially. On a one-acre lot, there are only 2,500 square feet that must <br /> include the driveway, deck, and any other impervious area, including the rooftop. He said the limit <br /> is 12000 feet on a two-acre lot, which may sound like a lot, but isn't. <br /> Christopher Sandt said it restricts denser multi-family development. He clarified that <br /> people could get approved for up to a 3% bump on the 6% requirement if they install a stormwater <br /> control measure that treats the 3% balance. However, he agreed with Commissioner McKee that <br /> it is very tough to build a house with a long driveway and try to keep the impervious surfaces <br /> under 6%. <br /> Commissioner McKee said the difference in impervious surface requirements creates an <br /> equity issue across the county. <br /> Cy Stober said all the base level impervious allowances allow for a 3% additional footprint <br /> with the installation of stormwater control measures. <br /> Commissioner McKee asked Cy Stober to explain stormwater control measures. <br /> Cy Stober said stormwater control measures are engineered devices designed to intercept <br /> all runoff from any paved area on a property and treat it for volume and sediment, and now <br /> nitrogen and phosphorus under the Falls Lakes rules. <br />