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--- "' -•• compute'"r�+c•stage-aZr- b <br /> streams. Carrboro also has standards for intermittent stxa�sar F L ?J <br /> irherea5 the County does not. i, <br /> Ila <br /> S L <br /> A-10 <br /> s <br /> land-disturbing activity in connection <br /> under ahlakenorrnatural°f <br /> , over, <br /> watercourse. i <br /> ` b- Graded Slopes and Fills <br /> the angle for graded slopes and fills <br /> shat be no greater than the angle which can be retained by <br /> vegetative cover or other adequate erosion control devices or struc- <br /> tures. In any event, slopes <br /> t days of completion tt sl pes left exposed will, within 30 working <br /> Provided with ground cover. devices, or�structuresnsufficienteto�se I� <br /> i restrain erosion. <br /> l c- Ground _ whenever land-disturbing activity is undertaken <br /> ! on a tract comprising more than 20,000 square feet, if more <br /> than 20,000 contiguous square feet is uncovered, the person <br /> conducting the land-disturbing activity shall install such I ' <br /> I sedimentation and erosion control devices and practices as are <br /> I`I <br /> sufficient to retain the sediment generated by the land-disturbin g <br /> activity within the boundaries of the tract during construction <br /> upon and development of said tract, and shall plant or otherwise l <br /> Provide a permanent ground cover sufficient to restrain erosion � � ? <br /> after completion of construction or development within 30 working <br /> ' days or 120 calendar days following completion, whichever period <br /> Is shorter. Amended .effective (April 8, 1980). <br /> I - d- Desil7n and Performance of Control Measures - erosion and �+ <br /> l ine . des n ned, a measures, structures, and devices shall be so <br /> planned, designed, and constructed as-to prvvide control of <br /> accelerated erosion and sedimentation from the calculated peak <br /> rates of runoff from a ten be calculated using theeproceduresyinstorm.USDAnosoi l ;n <br /> Conservation Service's, "National Engineering ' <br /> Conservation Practices," or other calculation II <br /> 9 geld Manual for <br /> to the Erosion Control Officer. Procedures acceptable <br /> on rainfall data published by the RNatip al computations <br /> eathernService for <br /> based <br /> the area. , <br /> I 8-1 � f <br /> I lion AddZaojwt Standtds t' <br /> Lake Wa.tenahed Son Land-D-46 tw b,,bi9 Activity &I. Unive uity <br /> 1. <br /> "3 <br /> The P'tovi,a.inna os Section 8 ahatt a <br /> I <br /> the Un.iveM,14 Lake Wateaahed. In pp� �0 �tnd-d�.dtuab.utg activity <br /> 1 maintenance o won, the dea.ign, constn�, <br /> 5 dnaina e b s terra tion, and I' <br /> Wateuhed a 9 y mt deveQ°pm w th.(n the Uyuv¢hstty Lake. Ij►:, _ <br /> s� aha�, coon ttOt •tot e�ezte►s�lea the t they aiie mope ft <br /> and �l:ese <br /> f t/wa¢ aet Swrth in Section k. t ve .clam <br /> f <br /> a. Cimuine f i n Runo - c6uutrte eut ' <br /> e P0 RunoSS aha.Ce be- Uuted t1140 3 �`�teh God es shaCe � <br /> sys-ten�S dea:fgned to iriacecuse time id o.then <br /> v� y, .incteaee .utS.i,Ctgcatic7n a °� eoncent n, deateaae I <br /> and remove, pottatants. , a tocu suspended 40tids to settCe, <br /> AttenatEo - �uct u: C encowcses sl ge. o,rXon, dcept"Ied, tuidened, s.j t�gh.tejIed, f <br /> j steed on o-the.;AK3e attened except ut accandcuncc cu_4 aye +h` <br /> I ;IFI <br /> . �~ �� Y�\ �� .�• - - 4- � 1 ���`ter <br /> 1ZLi - •h++x�«•+"- <br />