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[(-1j] "Accessory use" means a use which is incidental and subordinate to the <br /> <br /> principal use of the parcel of land on which it is located. <br /> [(~j] "Appeal" means a request for a review of the floodplain administrator's <br /> interpretation of any provision of this chapter or denial of a request for a variance. <br /> <br /> {{3~] "Area of shallow flooding" means a designated AO or AH zone on the <br /> Flood Insurance Rate Map (FIRM). The base flood depths range from one to three <br /> feet; a clearly defined chazmel does not exist; the path of flooding is unpredictable <br /> and indeterminate; and velocity flow may be evident. Such flooding is <br /> chazacterized by ponding or sheet flow. <br /> [(4~] "Backfill" means the placement of fill material within a specified <br /> depression, hole or excavation pit below the surrounding adjacent ground level as <br /> a means of improving [fleed-water] floodwater conveyance or to restore the land <br /> to the natural contours existing prior to excavation. <br /> "Base flood" means the flood having a one percent chance of being <br /> equalled or exceeded in any given year (also called the "one-hundred-year <br /> flood"). <br /> "Base flood elevation" means the water surface elevation of the base <br /> flood. <br /> "Basement" means any area of the building having its floor subgrade <br /> (below ground level) on all sides. <br /> [(8~J "Breakaway walls" aze any type of walls, whether solid or lattice, and <br /> whether constructed of concrete, masonry, wood, metal, plastic or any other <br /> suitable building material which is not part of the structural support of the <br /> building and which is designed to break away under abnormally high tides or <br /> wave action without causing any damage to the structural integrity of the building <br /> on which they are used or any buildings to which they might be carried by [f]eed <br /> ivater~J floodwaters. A breakaway wa?1 shall have a safe design loading <br /> resistance of not less than ten and no more than twenty pounds per square foot. <br /> Use of breakaway walls must be certified by a [registered] licensed structural <br /> engineer or architect and shall meet the following conditions: (A) breakaway wall <br /> collapse shall result from a water load less than that which would occur during the <br /> base flood; and (B) the elevated portion of the building shall not incur any <br /> structural damage due to the effects of wind and water loads acting <br /> simultaneously in the event of the base flood. <br /> "Coastal high hazard area" -See "Zone V" and "Zone VE." <br /> "Critical feature" means an integral and readily identifiable part of a flood <br /> protection system, without which the flood protection provided by the entire <br /> system would be compromised. <br /> "Development" means any man-made change to improved or unimproved <br /> real estate, including but not limited to buildings or other structures, mining, <br /> dredging, filling, grading, paving, excavation or drilling operations or storage of <br /> equipment or materials. <br /> [(I~)] "Drainage facility" -See "Watercourse." <br /> [(~3j] "Encroachment" means the advance or infringement of uses, plant growth, <br /> fill, excavation, buildings, permanent structures or development into a floodplain <br /> which may impede or alter the flow capacity of a floodplain. <br /> 4 <br /> <br />