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I ' A <br /> of this part of Efland and not affected by water quality in McGowan <br /> Creek. <br /> Lake Ben Johnson - is a small run-of-the-river portion of the Eno <br /> which is currently the Town of Hillsborough's primary water supply. <br /> This reservoir is located two miles downstream on the Eno from <br /> Corporation Lake, beyond the point where Seven-Mile Creek also <br /> enters the Eno River. Thus, the entirety of Efland drains into this <br /> water supply, as the portion of Efland south of the Southern <br /> Railway flows mainly into the Seven-Mile Creek basin, where a <br /> future reservoir has been proposed on Seven-Mile Creek south of <br /> Interstate 85. <br /> The future reservoirs, Seven-Mile Creek and Upper Eno, have <br /> different implications from Efland drainage. The Seven-Mile Creek <br /> watershed includes the southern portion of Efland, as all areas <br /> south of the Southern Railway drain into this creek. However, the <br /> Upper Eno reservoir would be located north of McGowan Creek, which <br /> means that none of the Efland area would drain into this potential <br /> source. (Please see Map 3) . <br /> As a result of this hydrological pattern, the entire community of <br /> Efland is within the Upper Eno Protected Watershed - whether <br /> draining into McGowan Creek, Seven-Mile Creek, or the Eno itself. <br /> Accordingly, special water quality protection provisions have been <br /> implemented for the entire watershed - including Efland as defined <br /> here. In addition, only a small portion of Efland is within a <br /> "water quality critical area" (WQCA) , an area which drains directly <br /> into a main tributary of a current or proposed reservoir, or the <br /> (current or proposed) reservoir itself. This protection <br /> classification requires special development protection measures, <br /> such as larger lots and more stringent ground cover limitations. <br /> The provisions of this classification will be discussed in greater <br /> detail in Subsection C of this section. <br /> Natural Historic and Cultural Sites of significance <br /> Orange County has endeavored during the past 10 years to inventory <br /> and identify sites of special significance in a number of different <br /> categories. <br /> This is done largely via two inventories: <br /> An Inventory- of Sites of Cultural Historic Recreational <br /> Biological and Geo o ical Significance in the Unincor orated <br /> Portions of Oran a Count . County of Orange, 1988. <br /> Inventor of the Natural Area and Wildlife Habitats of Oran e <br /> Count North Carolina. The Triangle Land Conservancy, 1988. <br /> 6 <br />