Unified Development Ordinance, 5th supplement, March 2018
Part 10A: Unified Development Ordinance City of Raleigh, North Carolina 12 – 19 Effective Date: March 6, 2018 Supp. No. 5 Article 12.2. Defined Terms | CHAPTER 12. DEFINITIONS U Transparency The ability to transmit light so objects on the other side of the material are visible. As applied to windows, the transparent material must pierce the building façade with a minimum distance of 4 feet maintained free of building materials, shelving or other impediment so that views are provided into and out of the building. Tree Disturbing Activity Any activity that results in one or more of the following: 1. The movement of earth, compaction of earth, chemical or physical alteration of earth or a change in the existing soil cover (both vegetative and non vegetative) or the existing soil topography in the critical root zone of a tree or within any tree conservation area, including but not limited to: chemical application, clearing, grading, filling, excavation, stabilization of structures and road or walkway construction 2. Chemical or physical alteration of a tree in any way that diminishes its health and vigor, including but not limited to removal, cutting, root pruning, branch pruning, topping, bark scraping and application of chemical or biological agents. 3. The placement within the critical root zoneor within any tree conservation area of any permanent or temporary encroachment, including but not limited to application of impervious surfaces, storage of equipment, materials, earth parking or circulation of vehicles or equipment. Twenty Five-Year Storm The stormwater runoff resulting from a rainfall of an intensity expected to be equaled or exceeded, on the average, once in 25 years and of a duration which will produce the maximum peak rate of runoff, from the watershed of interest under average antecedent wetness conditions. Two-Year Storm The stormwater runoff resulting from a rainfall of an intensity expected to be equaled or exceeded, on the average, once in 2 years and of a duration which will produce the maximum peak rate of runoff, for the watershed of interest under average antecedent wetness conditions. u Uncovered The removal of ground cover from, on or above the soil surface. Understory Tree An evergreen or deciduous tree whose mature height can be expected to range between 15 feet and 35 feet and which has an expected crown spread range between 15 feet and 25 feet as determined by the latest edition of “American Standards of Nursery Stock” as set forth by the American Association of Nurserymen. Undisturbed Area An area free of any tree disturbing activity except the planting of required landscaping and plantings required by conditional use zoning requirements. Unhealthy A plant or tree that meets any one or more of the following: 1. Its foliage and bark have a form and color that is not characteristic of the species similarly located within the city; 2. Its twig elongation is dissimilar to that of others of the same species and size similarly located within the city; 3. It is not free from infestation of insects and detrimental diseases; 4. More than 10% of its trunk circumference dies in any 1 calendar year; 5. More than 30% of its crown dies or is lost in any 1 calendar year; and/or 6. It no longer screens, filters or shades the area for which it was installed. Unity of Development The visual and functional integration of buildings within a development or area. Urban Frontage The following frontages: Green (-GR), Urban Limited (-UL), Urban General (-UG) and Shopfront (-SH). Utility Service Area An area which contains any utility box, booster box, switching station, transformer, pedestal or backflow preventor or similar above-grade device used to serve underground utilities.