AR: The base floodplain that results from the decertification of a previously accredited flood protection system that is in the process of being restored to provide a 100-year or greater level of flood protection. Base Flood Elevation (BFE) is the water surface elevation of the base flood rounded to the nearest whole foot (consult FIS profiles and tables for more accurate.Base flood depths (feet above ground) are provided. AO: The base floodplain with sheet flow, ponding or shallow flooding.AE Zone delineations are now used on new format FIRMs instead of A1-A30 Zones. AE: The base floodplain where base flood elevations are provided.This is the base floodplain where the FIRM shows a base flood elevation (old format). A1-A30: These are known as numbered A Zones (e.g., A7 or A14). Base flood elevation means the depth or peak eleva- tion of flooding, including wave height, which has a one percent or greater chance of occurring in any given year. ![]() This is often called an unnumbered A Zone or an approximate A Zone. A: The base flood mapped by approximate method, i.e., base flood elevations is not provided. An additional amount of height above the Base Flood Elevation used as a factor of safety (e.g., 2 feet above the Base Flood) in determining the level at which a structure's lowest floor must be elevated or floodproofed to be in accordance with state or community floodplain management regulations.Zone "A" (and its sub-designations: AE, AH, AO and A1-A99). Base flood elevation ( BFE ) means the elevation to which floodwater is anticipated to rise during the base flood.B, Zone B, An area inundated by 500-year flooding an area inundated by. Some zones have multiple sub-designations, as follows: An area inundated by flooding, for which BFEs or average depths have been determined. ![]() There are six (6) flood zone designations. Base flood elevation (BFE) means the elevation shown on the Flood Insurance Rate Map for Zones AE, AH, A1-30, VE and V1-V30 that indicates the water surface elevation resulting from a flood that has a 1-percent or greater chance of being equaled or exceeded in any given year.
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