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<br />Upper Neuse Watershed Management Plan Appendix A <br />Upper Eno (Corporation Lake) <br />Area in Orange County: 41.4 sq. mi. <br />10.3 percent of land area of Orange County <br />Existing development regulations: <br />• 1 unit per 2 acres in Critical Area <br />• 1 unit per acre and 12 percent impervious surface area maximum in <br />Protected Area <br />• Stream buffer approximately 100 feet <br />Development regulation changes required to meet non-degradation target: <br /> <br />ORANGE <br />COUNTY <br />Habitat Requirement <br />Enhanced peak flow management for any new developments >10 percent: imperviousness <br />Options for Managing Water QualitX <br />1. 1 unit per 5 acres and 5 percent impervious surface area maximum or <br />2. 1 unit per 3 acres plus 1 village per township or <br />3. Performance standards for all new developments: maximum nitrogen and phosphorus surface <br />loading of 1.7 Ibs/ac/yr and 0.3 Ibs/ac/yr, respectively. <br />See Chapter 4 for other recommended actions related to monitoring and enforcement, <br />education, point source controls, and stream/wetland restoration. <br />Upper Eno and Sevenmile Creek (Lake Ben Johnston) <br />Area in Orange County: 60.2 sq. mi. <br />15.0 percent of land area of Orange County <br />Existing development regulations: <br />• 1 unit per 2 acres in Critical Area <br />• 1 unit per acre and 12 percent impervious surface area maximum in <br />Protected Area <br />• Stream buffer approximately 100 feet <br />Development regulation changes required to meet non-degradation target: <br />r r; z <br />r;.~~:.: <br />~.g <br />ORANGE <br />COUNTY <br />Habitat Requirement <br />Enhanced peak flow management for any new developments >10 percent imperviousness <br />UNRBA May 2003 A-7 <br />