22-19 - Amend Chapter 1308 flood damage prevention following FEMA flood zone update - ordinance

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nature customarily incidental and subordinate to, the principal structure. (b) Appeal. A request for review of the floodplain administrator's in- terpretation of any provision of these regulations or a request for a vari- ance. (c) Base Flood. The flood having a one percent chance of being equaled or exceeded in any given year. The base flood may also be re- ferred to as the 1% chance annual flood or one - hundred (100) year flood. (d) Base (100 -Year) Flood Elevation (BFE). The water surface eleva- tion of the base flood in relation to a specified datum, usually the Na- tional Geodetic Vertical Datum of 1929 or the North American Vertical Datum of 1988, and usually expressed in Feet Mean Sea Level (MSL). In Zone AO areas, the base flood elevation is the lowest adjacent natural grade elevation plus the depth number (from I to 3 feet). (e) Basement. Any area of the building having its floor subgrade (be- low ground level) on all sides. (f) Breakaway wall. A wall that is not part of the structural support of the building and is intended through its design and construction to col- lapse under specific lateral loading forces, without causing damage to the elevated portion of the building or supporting foundation system. (g) Coastal high hazard area. An area of special flood hazard extending from offshore to the inland limit of a primary frontal dune along an open coast, and any other area subject to high velocity wave action from storms or seismic sources. A coastal high hazard area is identified on a City's FIRM by the designation of zone VE. (h) Development. Any manmade change to improved or unimproved real estate, including but not limited to buildings or other structures, min- ing, dredging, filling, grading, paving, excavation or drilling operations or storage of equipment or materials. (i) Enclosure Below the Lowest Floor. See "Lowest Floor." 0) Executive Order 11988 (Floodplain Management). Issued by Pres- ident Carter in 1977, this order requires that no federally assisted activi- ties be conducted in or have the potential to affect identified special flood hazard areas, unless there is no practicable alternative. (k) Federal Emergency Management Agency (FEMA). The agency with the overall responsibility for administering the National Flood In- surance Program. (1) Fill. A deposit of earth material placed by artificial means. (m) Flood or Flooding. A general and temporary condition of partial or complete inundation of normally dry land areas from: (n) the overflow of inland or tidal waters, and /or (o) the unusual and rapid accumulation or runoff of surface waters from any source. (p) Flood Hazard Boundary Map (FHBM). Usually the initial snap, produced by the Federal Emergency Management Agency, or U.S. De- partment of Housing and Urban Development, for a community depict- ing approximate special flood hazard areas. (q) Flood Insurance Rate Map (FIRM). An official map on which the Federal Emergency Management Agency or the U.S. Department of Housing and Urban Development has delineated the areas of special flood hazard. (r) Flood Insurance Risk Zones. Zone designations on FHBMs and FIRMS that indicate the magnitude of the flood hazard in specific areas of a community. Following are the zone definitions: (1) Zone A: Special flood hazard areas inundated by the 100 -year flood in any given year; base flood elevations are not determined. (2) Zones Al -30 and Zone AE: Special flood hazard areas inundated 24