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Article 6: Development Standards 114 <br /> Section 6.15: Soil Erosion and Sedimentation Control245F <br /> (b) Water shall be released from detention ponds into watercourses or <br /> wetlands at a rate and in a manner approximating the natural flow which <br /> would have occurred before development. <br /> (c) Retention and detention ponds shall be designed so that they maintain <br /> their structural integrity when subject to a 100-year storm. <br /> (d) Detention and retention areas shall be designed so that shorelines are <br /> sinuous rather than straight and so that the length of the shoreline is <br /> maximized, thus offering more space for the growth of littoral vegetation. <br /> (e) The banks of detention and retention areas shall slope at a gentle grade <br /> into the water as a safeguard against drowning, personal injury or other <br /> accidents, to encourage the growth of vegetation and to allow the <br /> alternate flooding and exposure of the areas along the shoreline as water <br /> levels periodically rise and fall. <br /> (11) Open Space <br /> (a) The use of drainage facilities and vegetated buffer zones as open space, <br /> recreation, and conservation areas shall be encouraged. <br /> (b) Recreational activities undertaken in these open space areas shall be <br /> limited to passive or leisure activities. <br /> (12) Grassed Swales <br /> (a) Drainage within the development shall be accommodated by the natural <br /> drainage systems whenever possible. <br /> (b) The use of grassed drainageways to channel water stormwater runoff <br /> shall be encouraged. <br /> (c) The velocity of stormwater runoff travel in this grassed swale shall range <br /> between 2-4 feet/second. <br /> (13) Retention of Runoff from Industrial Sites <br /> (a) On sites developed for industrial purposes (i.e., uses involving the <br /> manufacturing, processing, creating, repairing, renovating, painting, <br /> cleaning, or assembly of goods, merchandise, or equipment), retention <br /> or detention areas meeting the standards set forth in Section <br /> 6.15.7(C)(10) of this Ordinance299 shall be used to ensure that runoff is <br /> retained on the site before being released. The purpose of this <br /> requirement is to ei300nsure that, not only will the standard set forth in <br /> Section-301 6.15.8(A) of this Ordinance302 be met, but also a mechanism <br /> will be provided to safeguard the watershed against the spillage of toxic <br /> or dangerous substances. <br /> (D) Additional Standards for Borrow and Waste Areas <br /> (1) If the same person conducts the Land-Disturbing Activity and any related borrow <br /> or waste activity, the related borrow or waste activity shall constitute part of the <br /> Land-Disturbing Activity, unless the borrow or waste activity is regulated under <br /> the Mining Act of 1971, G.S. 74, Article 7, or is a landfill regulated by the Division <br /> of Waste Management. If the Land-Disturbing Activity and any related borrow or <br /> waste activity are not conducted by the same person, they shall be considered by <br /> the Erosion Control Officer as separate Land-Disturbing Activities.303 <br /> 291 Consistent reference to"this Ordinance". <br /> 30'Text correction—grammar fix. <br /> 301 Text correction—deleted a space. <br /> 302 Consistent reference to"this Ordinance". <br /> 303 Revised to match NCDEQ's current model ordinance, based on NCDEQ peer review comment. <br /> Orange County, North Carolina—Unified Development Ordinance Page 6-131 <br />