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Average flood depths derived from detailed hydraulic analyses are shown within <br />this zone. Mandatory flood insurance purchase requirements apply. <br />Zone AR: Areas that result from the decertification of a previously accredited flood <br />protection system that is determined to be in the process of being restored to <br />provide base flood protection. Mandatory flood insurance purchase requirements <br />apply. <br />Zone A99: Areas subject to inundation by the one-percent annual chance flood event, but <br />which will ultimately be protected upon completion of anunder-construction <br />Federal flood protection system. These are areas of special flood hazard where <br />enough progress has been made on the construction of a protection system, such as <br />dikes, dams, and levees, to consider it complete for insurance rating purposes. Zone <br />A99 may only be used when the flood protection system has reached specified <br />statutory progress toward completion. No base flood elevations or depths are <br />shown. Mandatory flood insurance purchase requirements apply. <br />(2) Accessory structure (appurtenant structure) means a structure that is located on the <br />same parcel of property as the principal structure and the use of which is incidental <br />to the use of the principal structure. Accessory structures should constitute a <br />minimal initial investment, may not be used for human habitation, and be designed <br />to have minimal flood damage potential. Examples of accessory structures are <br />detached garages, carports, storage sheds, pole barns, and hay sheds. <br />(3) Addition (to an existing structure) means any walled and roofed expansion to the <br />perimeter of a structure in which the addition is connected by a common load- <br />bearing wall other than a firewall. Any walled and roofed addition, which is <br />connected by a firewall or is separated by independent perimeter load-bearing <br />walls, is new construction. <br />(4) Appeal means a request for a review of the floodplain administrator's interpretation <br />of any provision of this ordinance or a request for a variance. <br />(5) Area of shallow flooding means a designated AO or AH Zone on the community's <br />Flood Insurance Rate Map (FIRM) with base flood depths from one to three feet <br />where a clearly defined channel does not exist, where the path of flooding is <br />unpredictable and indeterminate, and where velocity flow may be evident. Such <br />flooding is characterized by ponding or sheet flow. <br />(6) Base Flood Elevation (BFE) means the elevation of the one-percent annual chance <br />flood. <br />(7) Basement means that portion of a structure having its floor sub-grade (below <br />ground level) on all sides. <br />(8) Building -see "Structure." <br />Page 4 of 31 <br />