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[(~] "Accessory use" means a use which is incidental and subordinate to the <br />principal use of the parcel of land on which it is located. <br />[(~] "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 />{{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 channel does not exist; the path of flooding is unpredictable <br />and indeterminate; and velocity flow may be evident. Such flooding is <br />characterized by ponding or sheet flow. <br />[(-0~] "Backfill" means the placement of fill material within a specified <br />depression, hole or excavation pit below the sun-ounding adjacent ground level as <br />a means of improving [deed-~vateF] floodwater conveyance or to restore the land <br />to the natural contours existing prior to excavation. <br />{(3~] "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 />{(-~j] "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 />[(8j] "Breakaway walls" are 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 [Reed <br />~] floodwaters. A breakaway wall 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 [~egiste~ed] 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 />{(~9j] "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 />[(~] "Drainage facility" -See "Watercourse." <br />[(~3~] "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 Clow capacity of a toodplain. <br />4 <br />