20211213 13485200 1.0 TRUE Base Flood Elevation Lines The computed elevation to which floodwater is anticipated to rise during the base flood. Base Flood Elevations (BFEs) are shown on Flood Insurance Rate Maps (FIRMs) and on the flood profiles. The BFE is the regulatory requirement for the elevation or floodproofing of structures Roanoke County, FEMA (Federal Emergency Management Agency)