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Article 6: Development Standards 86 <br /> Section 6.15: Soil Erosion and Sedimentation Control201 F <br /> (a) Retention and detention ponds may be used to retain and detain the <br /> increased and accelerated stormwater runoff which the development <br /> generates. <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 Ordinance 239 shall be used to ensure that runoff is <br /> retained on the site before being released. The purpose of this <br /> requirement is to ei240nsure that, not only will the standard set forth in <br /> Section-�4' 6.15.8(A) of this Ordinance242 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 /> 239 Consistent reference to"this Ordinance". <br /> 241 Text correction—grammar fix. <br /> 241 Text correction—deleted a space. <br /> 242 Consistent reference to"this Ordinance". <br /> Orange County, North Carolina—Unified Development Ordinance Page 6-126 <br />