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Article 6: Development Standards 133 <br /> Section 6.15: Soil Erosion and Sedimentation Control266F <br /> construction or development. <br /> (b) EXGen+as preyided in co,.+i„n G �iR�i��io� of+h o nr non,o <br /> Pprovisions for a ground cover sufficient to restrain erosion must be <br /> accomplished within 15 working days or on calendar days whiGheve <br /> period is she he timelines as specified in the most current version308 <br /> of the North Carolinas Administrative Code Title 15A Chapter 4: <br /> Sedimentation Control Ere ci„n Gointrel ftAnnunl following completion of <br /> construction or development. <br /> {48)(5) Design Storm <br /> (a) Except as provided in Sections 6.15.7(B)(6) and 6.15.7(B)(7)-309 of this <br /> Ordinance and in the standard for-sedimon+ ponds in the evil Eresien <br /> and Sediment Gen+rol Mangy almne+nUrreRt yerci n319 of+SG- Cry <br /> erosion and sedimentation control measures, structures, <br /> and devices shall be so planned, designed, and constructed as to <br /> provide protection from accelerated erosion and sedimentation from the <br /> calculated maximum peak rates of stormwater runoff31 from the 10ten- <br /> year frequency storm. <br /> (b) RuReff Stormwater runoff rates shall be calculated according to tag the <br /> procedures in the latest edition of the United States Department of <br /> AgricultureSDA Natural Resources-&G4-Conservation Service's "National <br /> Engineering Field Handbook 630 forManual fer Conservation Practices," <br /> or according to other calculation procedures acceptable to the Erosion <br /> Control Officer. <br /> "f} LStandards for High Quality Waters <br /> In High Quality Water(HQW)zones the following design standards shall apply: <br /> (a) Uncovered Areas <br /> (i) Uncovered areas in HQW zones shall be limited at any time to a <br /> maximum total area of 20 acres within the boundaries of the <br /> tract. Only the portion of the Land-Disturbing Activity within a <br /> HQW zone shall be governed by this section. <br /> (ii) Larger areas may be uncovered within the boundaries of the <br /> tract with the written approval of-_by Director of the Di"iSi n Gf <br /> Land Rese FGGS of the Department of ERVirnnmen+and Natural <br /> ResouMeTtThe Division of Energy, Mineral, and Land <br /> Resources (DEMLR), upon the applicant providing engineering <br /> justification with a construction sequence that considers phasing, <br /> limiting exposure, submission of weekly self-inspection reports, <br /> and more conservative design than the 25-year storm. The <br /> Director of DEMLR may also stipulate the inclusion of other <br /> conditions in the plan as necessary based on specific site <br /> conditions.-312 <br /> Next r-mm- t+e^-- dpd , .-pace <br /> 101 For ground cover requirements-cEonsistent reference to"most current version"of the NC Administrative Code <br /> Title 15A Chapter 4:Sedimentation Control. <br /> 101 Text correction—added a space. Reference to the sections specific to additional requirements for projects in <br /> HWQ and Falls Lake Watershed areas. <br /> 311 Consistent use of"stormwater runoff'—NOTE.the use of"stormwater runoff"is implemented through <br /> remainder of Section 6.15,as applicable. <br /> "I Correction of entity name and addition of information from 15A NCAC Chapter 4. <br /> Orange County, North Carolina—Unified Development Ordinance Page 6-125 <br />