Unified Development Ordinance, 4th supplement, September 2017

Part 10A: Unified Development Ordinance City of Raleigh, North Carolina 9 – 2 Effective Date: September 01, 2013 Supp. No. 4 Article 9.1. Tree Conservation Sec. 9.1.1. Intent The intent of the tree conservation regulations is to preserve tree coverage, mature trees and natural resource buffers, and lessen the impact of development on the surrounding properties. The most significant trees, greater basal area tree stands and healthy trees in the most appropriate locations, should be considered when granting an alternate. Sec. 9.1.2. Applicability Prior to approval of any subdivision of any tract 2 acres or greater in size or site plan for a parcel 2 acres or greater, tree conservation areas must be provided in accor- dance with the requirements of this UDO, provided that delineation of tree conser- vation areas for a site subject to either condemnation or the threat of condemnation shall be delayed until a site plan or further subdivision of the parcel first occurs. Sec. 9.1.3. Tree Conservation Required A. Tree Conservation 1. Tree conservation area requirements by district are set forth below. The eligibility for tree conservation is based on the gross site area. The amount of conservation area required is calculated as a percentage of the net site area. District Conservation Area Required (min) R-1, R-2 15% All other districts 10% 2. Any eligible tree conservation priority in conflict with a build-to requirement is not required to be protected. Sec. 9.1.4. Tree Conservation Area Allocation A. Primary Tree Conservation Areas The following are primary tree conservation areas and must be the first areas saved to meet the tree conservation requirement. All primary tree conservation areas on the site must be established even if doing so exceeds the minimum required percentage. 1. -SHOD-1 and -SHOD-2 protective yards (see Sec. 5.3.1. ) . 2. Parkway Frontage protective yards (see Sec. 3.4.3. ) 3. CM primary tree conservation areas (see Article 4.2. Conservation Management (CM) ) . 4. -MPOD protective yards (see Sec. 5.2.2. ) . 5. A healthy, champion tree and its critical root zone. 6. Zone 2 of Neuse River Riparian Buffers, as established in title 15A of the North Carolina Administrative Code Subarticle 2B Section .0233. 7. Areas with a gradient of 45% or greater that are adjacent to or within floodways. 8. An undisturbed area adjoining aThoroughfare varying in width between 0 and 100 feet; provided that the total undisturbed area is equal to an area measured 50 feet perpendicular to theThoroughfare. B. Secondary Tree Conservation Areas 1. The following secondary tree conservation areas, listed in priority order from highest to lowest, must be included once the primary tree conservation areas are exhausted. a. A minimum 65-foot wide perimeter buffer when the adjoining or adjacent property is not a Thoroughfare or is not vacant. b. A minimum 32-foot wide perimeter buffer when the adjoining or adjacent property is vacant. c. The critical root zone of any tree 10 inches or greater in DBH that is located within 50 feet of a Thoroughfare or within 65 feet of any non- vacant property boundary or roadway that is not a Thoroughfare. d. The critical root zone of any tree 10 inches or greater in DBH that is located within 32 feet of a vacant property boundary. 2. Secondary tree conservation areas described in h. through Sec. 9.1.4.B.1.b. above must be at least 32 feet in all directions and be a minimum of 4,000 square feet in area, excluding external boundaries. 3. The critical root zone of a saved tree in Sec. 9.1.4.B.1.c. or Sec. 9.1.4.B.1.d. above must be preserved in entirety even if it extends beyond 65 feet or 32 feet. When a landscape easement is obtained from the adjoining land that prohibits all tree disturbing activity, off-site areas for protected critical root