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Article 10: Definitigm Section 10.1: Definitions An area of land adjacent to a stream or a FEMA-identified floodplain, whichever is greater, which, except as permitted within this Ordinance, must remain undisturbed in its natural state. Streams are identified by any of the following means: a) Shown as solid blue lines or as broken blue lines on the USGS Quadrangle maps, b) Shown as a water feature in the Orange County Soil Survey, or c) A water feature identified by a field determination of County staff trained in surface water identification through the North Carolina Division of Water tyEnvironmental Quality ( QNCDEQ). Stream buffers shall extend around the perimeter of all other water features if any portion of the stream buffer touches the water feature. Disputes pertaining to water feature identification decisions by County staff shall be filed directly to the QNCDEQ. S eam, Ephemeral (Stormwater) A fe ure that carries only stormwater in direct response to precipitation with water flowing on during and sh rtly after large precipitation events. An ephemeral stream may or may not have a w -defined channel, a aquatic bed is always above the water table, and stormwater runoff is the pri ary source of A water. n hemeral stream typically lacks the biological, hydrological, and physical ch acteristics commonly as ociated with continuous or intermittent conveyance of water. Stream, Inter 'ttent A well defined chan I that contains water for only part of the year, typically d ing winter and spring when the aquatic bed below the water table. The flow may be heavily sup emented by stormwater runoff. An intermittent st am often lacks the biological and hydrological c racteristics commonly associated with the contin us conveyance of water. Stream, Modified Natura An on-site channelization or reloc ion of a stream channel and s sequent relocation of the intermittent or perennial flow as evidenced by to ographic alterations in the mmediate watershed. A modified natural stream must have the typical biologic a hydrological and ph y cal characteristics commonly associated with continuous conveyance of water. Stream Order A ranking of the relative sizes of streams within w rshed based on the nature of their tributaries. The smallest unbranched tributary is called first order, a stream receiving the tributary is called second order, and so on. Stream, Perennial A well-defined channel that contains wat year round duri a year of normal rainfall with the aquatic bed located below the water table for most the year. Groundwa r is the primary source of water for a perennial stream, but it also carries s rmwater runoff. A peren ' I stream exhibits the typical biological, hydrological and physical character' tics commonly associated wi continuous conveyance of water. Street A way for vehicular traffic w ther designated as a street, highway, thor hfare, parkway, throughway, freeway, road, avenue, bo evard, lane, place or however otherwise desig ted. Street, Alley A minor way used imarily for vehicular access to the rear or side of properties o erwise abutting a street at the front nd which is not intended for general circulation. Street, A rial A street us d primarily for through traffic, usually on a continuous route. These streets car high volumes f traffic, in excess of 1,200 trips per day. For purposes of these regulations such st ets includ hose so designated in the Comprehensive Plan or element thereof. S eet, Collector Orange County, North Carolina—Unified Development Ordinance Page 10-54