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Article 10: Definitions Section 10.1: Definitions Orange County, North Carolina – Unified Development Ordinance Page 10-69 purpose of stormwater provision of this Ordinance, the waterbody must be part of a natural drainageway (i.e. connected by surface flow to a stream). Water-Dependent Structure Any structure for which the use requires access to or proximity to or citing within surface waters to fulfill its basic purpose, such as boat ramps, boathouses, docks and bulkheads. Ancillary facilities such as restaurants, outlets for boat supplies, parking lots and commercial boat storage areas are not water- dependent structures. Water Feature A prominent aspect or characteristic of a geographic area that exhibits verifiable evidence of a presence of water in the soil. Examples of water features include, but are not limited to, perennial and intermittent streams, lakes, ponds, reservoirs, springs, artesian wells, irrigation wells, marshes or swamps, wetlands, and natural drainage ditches (non-ephemeral). Water surface elevation (WSE) The height, in relation to mean sea level, of floods of various magnitudes and frequencies in the floodplains of riverine areas. Watercourse A lake, river, creek, stream, wash, channel or other topographic feature on or over which waters flow at least periodically. Watercourse includes specifically designated areas in which substantial flood damage may occur. Water Supply, Public A water supply system that serves a city or town located partly or entirely within Orange County that has a population in excess of 2,500. Water Supply Watershed (or Protected Watershed) Land that drains to existing reservoirs which are public water supplies or potential reservoir sites or stream intakes which have been designated for protection. All such lands have been classified by the Environmental Management Commission as WS-II, WS-III or WS-IV watersheds and require protection in accordance with the State Mandate. (See definition for “State Mandate”). Water Supply Watershed Critical Area, County Designated The land area within one-half mile of the normal pool elevation (or designated elevation) of an existing Class II water supply reservoir, or the ridgeline of the watershed, whichever is less; and the land area within one-half mile of the normal pool elevation (or designated elevation) of a proposed water supply reservoir designated for protection, or the ridgeline of the watershed, whichever is less; and the area within one-half mile of streams flowing into Class I reservoirs, as designated for protection within this Ordinance. Water Supply Watershed Critical Area, State Required The land area within one-half mile of the normal pool elevation of water supply reservoirs in which an intake is located (i.e., Class I reservoirs), or the ridgeline of the watershed, whichever is less. Wetlands Those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas. (Definition taken from EPA regulations at 40 CFR Section 230.3(t) and COE Regulations at 33 CFR Section 328.3(b), as of July 2nd, 2002) Wholesale Trade 192