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Article 3 Zoning Districts
3-74 WSO, Water Supply Watershed Overlay District
Wake County Unified Development Code
3-54
(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.