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Article 6: Development Standards 112 <br /> Section 6.15: Soil Erosion and Sedimentation Contro1245F <br /> (2) Alteration of Watercourses <br /> (a) Natural watercourses shall not be dredged, cleared of vegetation, <br /> deepened, widened, straightened, stabilized or otherwise altered except <br /> in accordance with an approved FiFesion eFes'eR and sedo ,.epAgUep <br /> -Control-WanErosion and Sedimentation Control Plan. <br /> (b) Water shall be retained or detained before it enters any natural <br /> watercourse in order to preserve the natural hydro-dynamics of the <br /> watercourse and to prevent sedimentation. <br /> (3) Limit ' and-Disturbing nGtivityLand-Disturbing Activity <br /> (a) The area of disturbance by development shall be as small as practical. <br /> (4) Land Alterations <br /> (a) No grading, cutting or filling shall be commenced until erosion and <br /> sedimentation control devices have been installed between the disturbed <br /> area and water bodies, watercourses, wetlands, or adjoining properties. <br /> (5) Wetland Protection <br /> (a) Wetlands and other water bodies shall not be used as sediment traps <br /> during development. <br /> (6) Maintenance Requirements and Responsibility <br /> (a) Erosion and sedimentation facilities shall receive regular maintenance to <br /> ensure that they continue to function properly. <br /> (b) Temporary basins shall be cleaned out when they are filled to 50% of <br /> their design capacity. <br /> (7) Artificial Watercourses <br /> (a) Any artificial watercourse (where the need is demonstrated) shall be <br /> designed considering soil type so that the velocity of flow is low enough <br /> to prevent accelerated erosion. <br /> (8) Buffer Area Requirements <br /> (a) Soil and pollutants carried over land, primarily from roads, trails, and/or <br /> land-disturbing activities, can be effectively trapped by leaving a <br /> relatively undisturbed strip of vegetation parallel and adjacent to the <br /> watercourse. <br /> (b) Properly managed overland water stormwater runoff can be directed <br /> into this buffer area in a manner that will reduce velocity and cause <br /> dispersion of the waterstormwater runoff. Sediments carried by the water <br /> stormwater runoff will settle out as a result of this slowing and dispersion <br /> process. <br /> (c) The width of these buffer areas shall depend on the type of stream or <br /> drainage area and shall be determined as follows: <br /> (i) Creeks and tributaries - (i.e., permanent streams flowing directly <br /> into a water supply reservoir within University Lake, Cane Creek, <br /> and Upper Eno Watersheds and permanent streams flowing into <br /> such streams). <br /> a. Measure along a line running perpendicular to the edge <br /> of the floodplain 50 feet from the edge of the floodplain <br /> plus an additional distance equal to: 4 x slope x 100. <br /> Orange County, North Carolina—Unified Development Ordinance Page 6-129 <br />