Floodway
Designated on FEMA NFIP maps, either the Flood Insurance Rate Map (FIRM) or the Flood Boundary Floodway Map (FBFM), as the area of a watercourse plus the adjacent overbank floodplain that should not be encroached upon in order to allow the discharge of the base flood. Any activity in the floodway must comply with the NFIP and local regulations.