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7 <br /> through extension of the Efland sewer system owned by Orange County. <br /> Because the district is bordered or bisected by so many transportation and <br /> utility systems,the entire district has been designated as Primary <br /> Development Area. <br /> The district is characterized by gently rolling topography with few <br /> building constraints. However, soils unsuited for development are found <br /> along intermittent streams which flow south beneath I-40/1-85 to join <br /> Seven-mile Creek, a tributary of the Eno River. Because of its location <br /> on the western edge of the Upper Eno Watershed, land uses in the district <br /> are subject to watershed protection standards governing impervious <br /> surface and the control of stormwater. <br /> The total amount of impervious surface covered by buildings and parking <br /> lots is limited to 70%of a building site. As shown on the schematic plan, <br /> stormwater control for multiple sites may be provided through <br /> construction of several detention basins. located along individual streams <br /> draining the district,particularly on the north side of the interstate(as <br /> shown on the schematic man). Alternatively, larger. single detenrio_n <br /> basin could be constructed on the south side of I-85 at or below the <br /> confluence of the streams. Detention basins may also be constructed on <br /> individual sites. Impervious surface limits and standards for detention <br /> basin construction and maintenance are discussed further in Section 2.3 - <br /> Land Intensity and Appendix C - Wet Detention Basin Standards., <br /> respectively. <br /> Section 2.4 Environmental Factors <br /> I-85/Buckhorn Road District <br /> The I-85 Buckhorn Road Economic Development District has three <br /> potential service providers-the Orange-Alamance Water Corporation, <br /> Orange County(through the Efland sewer system), and the City of <br /> Mebane. <br /> Water Supply. Service to this District is available from the Orange <br /> Alamance Water Corporation by-way-of an existing 12-inch water line <br /> along U.S. Highway 70. From this distribution main extend the following <br /> lines: <br /> 6-inch water line West side of Buckhorn Road from U.S. Highway 70 <br /> to south side of Southern Railroad <br />