Secondary and Cumulative Impacts Master Management Plan - 2014

Article 3 Zoning Districts 3-74 WSO, Water Supply Watershed Overlay District

(20) Wetland restoration 3-73-8 Design, Construction, and Maintenance of Disturbances within Special Watershed Buffers Any allowed disturbance that occurs as a result of the activities expressly permitted in Section 3-73- 7(B) must be designed, constructed, and maintained so as to: (A) minimize impervious or partially impervious surface coverage; Commentary: The use of pervious surfacing materials and/or dual ribbon design is encouraged. (B) diffuse the flow of stormwater runoff, encourage sheet flow and avoid concentrated discharge of stormwater into surface waters; (C) maximize the use of Best Management Practices (BMPs) to minimize adverse water quality impacts; and comply with all applicable standards and conditions of Section 3-73-7(B). OA 05/02 May 16, 2005 3-74 WSO, Water Supply Watershed Overlay District 3-74-1 Purpose The WSO, Water Supply Watershed Overlay district is intended to ensure that the quality of public water supplies is protected while allowing limited orderly development. The regulations of the WSO overlay district protect water quality by requiring vegetated watershed buffers around surface water bodies and streams and by limiting the area of impervious coverage. The subdistricts and their accompanying development standards are consistent with the classifications used by North Carolina Department of Environment and Natural Resources and recognize the varying function and sensitivity of different watershed areas. 3-74-2 Subdistricts Established The WSO overlay district includes the following subdistricts: (A) WSO-2NC, Water Supply Watershed II (Non-Critical Area) The WSO-2NC overlay district is intended to be applied to the area outside of the designated critical area of all WS- II watersheds outside of the watershed’s critical area, as classified by the North Carolina Department of Environment and Natural Resources. (B) WSO-3NC, Water Supply Watershed III (Non-Critical Area) The WSO-3NC overlay district is intended to be applied to the area outside of the designated critical area of all WS-III watersheds, as classified by the North Carolina Department of Environment and Natural Resources. (C) WSO-3CA, Water Supply Watershed III (Critical Area) The WSO-3CA overlay district is intended to be applied to the designated critical area of all WS-III watersheds, as classified by the North Carolina Department of Environment and Natural Resources. (D) WSO-4P, Water Supply Watershed IV (Protected Area) The WSO-4P overlay district is intended to be applied to the designated protected area of all WS-IV watersheds, as classified by the North Carolina Department of Environment and Natural Resources. The overlay contains two subdistricts: WSO-4P-1 and WSO-4P-2.

Wake County Unified Development Code 3-54