Base (100-Year) Flood Elevation (BFE)


Base (100-Year) Flood Elevation (BFE) : The water surface elevation of the base flood in relation to a specified datum, usually the National Geodetic Vertical Datum of 1929 (NGVD) or the North American Vertical Datum of 1988 (NAVD), and usually expressed in units of feet. In Zone AO areas, the base flood elevation is the natural grade elevation plus the depth number (from 1 to 3 feet)
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