9.7.22 Planning Board Packet - Laserfiche WebLink

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Article 6: Development Standards 123 Section 6.15:Soil Erosion and Sedimentation Control268F (3) Every effort shall be made to maintain buffer zones consisting of existing vegetation between the Land-Disturbing Activity and the watercourse. (G) Additional Standards for Economic Development Districts The following additional standards shall apply within the Economic Development Districts: (1) Lot grading must be done in such a way as to preserve the topographic features and maintain natural drainage patterns, and to provide positive drainage. In locating buildings, parking, and other features on the site, the following standards must be met: (a) Minimize disturbance and phase development wherever practical. (b) Preserve existing vegetation, especially significant stands of trees along drainageways, on steep slopes, and in buffer areas. (c) Use the natural shape of the land with minimal grading to locate features in a way that minimized impacts on and off the site. (2) All site grading must be designed to meet the standards shown on the following table: SLOPE . STANDARDS SLOPESITE AREA MINIMUM SLOPE MAXIMUM Planting Areas 2% 3:1 Parking Lot Pavement 2% 4% Driveways and Access Drives 2% 5% Pedestrian Plaza Areas 1% 2% Sidewalks 1% 8% (3) No cut or fill slopes of any type may be steeper than 3:1 and must have smooth vertical transitions. Where space limitations demand, terracing with approved retaining walls will be utilized. Where retaining walls are used, they must be constructed of a material compatible with the building architecture. (4) Berms, channels, swales, etc. must be graded in such a way as to be an integral part of the landscape, and paved surfaces must be designed with smooth vertical transitions between changes in slope. (5) In order to minimize soil erosion, practical combinations of the following shall be used: (a) Expose the smallest practical area of cleared land during construction. (b) Temporary ditches, dikes, vegetation, and/or mulching must be used to protect critical areas exposed during development or construction. (c) Sediment control measures must be installed and maintained to remove sediment from rja-of#stormwater runoff was during development. (d) Permanent landscaping and groundcover must be installed as soon as practical after construction activities are completed. (e) Temporary groundcover must be used for fill material subject to erosion and on construction projects over six months duration. 6.15.8 Stormwater Outlet Protection (A) Control of Discharge in University Lake, Cane Creek, and Upper Eno Watersheds Orange County, North Carolina— Unified Development Ordinance Page 6-133