Base Flood Elevation (BFE) - Pertains to Zones AE, AH, A1-A30, AR, AR/A, AR/AE, AR/A1-A30, AR/AH, AR/AO, V1-V30, and VE only. The water level that would result from a Base Flood is usually expressed as a number of feet above sea level as established by a vertical elevation datum, such as NGVD 1929 or NAVD 1988. There is a 1% chance that flooding would meet or exceed the BFE in a specific location in a given year.