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1/10/2005 ARTICLE II. DEFINITIONS Sec. 41.2.1. DEFINITIONS: Unless specifically defined in this Article, words or phrases used in this Chapter shall be interpreted so as to give them the meaning they have in common usage and to give this Chapter its most reasonable application. ACCESSORY USE means a use which is incidental and subordinate to the principal use of the parcel of land on which it is located. ALLUVIAL FAN means a geomorphologic feature characterized by a cone or fan- shaped deposit of boulders, gravel, and fine sediments that have eroded from mountain slopes, transported by flood flows, and then deposited on the valley floors, and which is subject to flash flooding, height velocity flows, debris flows, erosion, sediment movement and deposition, and channel migration. APEX means the point of highest elevation on an alluvial fan, which on undisturbed fans is generally the point where the major stream that formed the fan emerged from the mountain front. APPEAL means a request for a review of the Floodplain Administrator's interpretation of any provision of this Chapter. AREA OF SHALLOW FLOODING means a designated AO or AH Zone on the Flood Insurance Rate Map (FIRM). The base flood depths range from one to three feet; a clearly defined channel does not exist; the path of flooding is unpredictable and indeterminate; and velocity flow may be evident. Such flooding is characterized by ponding or sheet flow. AREA OF SHALLOW FLOOD HAZARD - See "Special flood hazard zone." BASE FLOOD means a flood having a one percent (1%) chance of being equaled or exceeded in any given year (also called the "1 DO-year flood"). Base flood is the term used throughout this Chapter. BASEMENT means any area of the building having its floor subgrade (i.e., below ground level on all sides). BREAKAWAY WALLS are any type of walls, whether solid or lattice, and whether constructed of concrete, masonry, wood, metal, plastic or any other suitable building material which is not part of the structural support of the building and which is designed to break away under abnormally high tides or wave action without causing any damage to the structural integrity of the building on which they are used or any buildings to which they might be carried by floodwaters. A breakaway wall shall have a safe design- loading resistance of not less than ten (10) and no more than twenty (20) pounds per Atty/OrdlOrd.223 120104 3 2277 Muff # 802