Secondary and Cumulative Impacts Master Management Plan - 2014

APPENDIX B – WAKE COUNTY PROGRAMS TO MITIGATE SECONDARY AND CUMULATIVE IMPACTS

this SCIMMP. These rules require that existing riparian buffer areas be protected and maintained on both sides of intermittent and perennial surface waters. Article 11 of the UDO requires that all riparian surface waters in the County’s jurisdiction have a 50-foot-wide buffer if the feature is present on either the most recent version of the USDA Soils Map or 7.5-minute quadrangle topographic map prepared by the USGS. Wider riparian buffers are required in water supply watersheds (WSWs) and Resource Conservation Overlay Districts, as described below. The Swift Creek Watershed falls within portions of the planning area for Wake County, the towns of Apex, Cary, Gardner and Holly Springs, and the City of Raleigh. Swift Creek is identified as a water supply watershed (WSW). According to Article 11 of the UDO, the following buffer requirements apply in WSWs:  100 feet from the flood pool elevation of a water supply impoundment that are 25 or more acres (measured perpendicular to the shoreline)  50 feet from the normal pool elevation of a non-water supply impoundment with a drainage area of 25 acres or more  100 feet along perennial streams on the most recent edition of USGS topographic maps; inner 50 feet (Zone 1) is undisturbed vegetated; outer 50 feet (Zone 2) is stable vegetated  50 feet along non-perennial watercourse, channel, ditch, or similar physiographic feature with a drainage area of 25 acres or more  30 feet from the normal pool elevation of the water supply impoundment with a drainage area of at least 5 acres but less than 25 acres  30 feet along each side of a watercourse, channel, ditch, or similar physiographic feature with a drainage area of at least 5 acres but less than 25 acres  Minimum building setback from all buffers of 20 feet, except the 100-foot perennial stream buffer, which has no required setback  Inner 50 feet (Zone 1) of the 100-foot-wide required buffer along perennial streams either platted as part of a development lot and included within a conservation easement, or set aside as a reserved conservation parcel Bass Lake is located within the Town of Holly Springs Planning Area and within the County’s Resource Conservation Overlay districts. According to Article 11 of the UDO, the following buffers apply in a Resource Conservation Overlay district:  100 feet required around special water impoundment (special watershed: a watershed area in Wake County zoning jurisdiction that contains [a] special water impoundment[s] that provide[s] significant wildlife habitat, characteristics unique to Wake County, public recreation, or potential for future recreation)  50 feet along each side of a stream or impoundment draining 25 or more acres of land

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