An area inundated by 1% annual
chance flooding with velocity hazard (wave action); no BFEs have been determined.
Zone VE
An area inundated by 1% annual
chance flooding with velocity hazard (wave action); BFEs have been determined.
Zone A
An area inundated by 1% annual
chance flooding, for which no BFEs have been determined.
Zone AE
An area inundated by 1% annual
chance flooding, for which BFEs have been determined.
Zone AO
An area inundated by 1% annual
chance flooding (usually sheet flow on sloping terrain), for which average depths have
been determined; flood depths range from 1 to 3 feet.
Zone AO (Alluvial
Fan)
An alluvial fan
inundated by 1% annual chance flooding (usually sheet flow on sloping terrain), for which
average flood depths and velocities have been determined; flood depths range from 1 to 3
feet.
Zone AH
An area inundated by 1% annual
chance flooding (usually an area of ponding), for which BFEs have been determined; flood
depths range from 1 to 3 feet.
Zone A99
An area inundated by 1% annual
chance flooding, for which no BFEs have been determined. This is an area to be protected
from the 1% annual chance flood by a Federal flood protection system under construction.
Zone D
An area of undetermined but
possible flood hazards.
Zone AR (Future)
An area inundated by flooding,
for which BFEs or average depths have been determined. This is an area that was
previously, and will again, be protected from the 1% annual chance flood by a Federal
flood protection system whose restoration is Federally funded and underway.
Zone X500 (0.2%
Annual Chance)
An area inundated by
0.2% annual chance flooding; an area inundated by 1% annual chance flooding with average
depths of less than 1 foot or with drainage areas less than 1 square mile; or an area
protected by levees from 1% annual chance flooding.
Zone X
An area that is determined to be
outside the 1% and 0.2% annual chance floodplains.
Zone 100IC (1% Annual Chance
Flood Discharge Contained in Channel)
An area where the 1% annual
chance flooding is contained within the channel banks and the channel is too narrow to
show to scale. An arbitrary channel width of 3 meters is shown. BFEs are not shown in this
area, although they may be reflected on the corresponding profile.
Zone 500IC (0.2% Annual Chance
Flood Discharge Contained in Channel)
An area where the 0.2% annual
chance flooding is contained within the channel banks and the channel is too narrow to
show to scale. An arbitrary channel width of 3 meters is shown.
Zone FWIC (Floodway Contained in
Channel)
An area where the floodway is
contained within the channel banks and the channel is too narrow to show to scale. An
arbitrary channel width of 3 meters is shown. BFEs are not shown in this area, although
they may be reflected on the corresponding profile.
Zone FPQ (Flood Prone Area)
An area designated as a
"Flood Prone Area" on a map prepared by USGS and the Federal Insurance
Administration. This area has been delineated based on available information on past
floods. This is an area inundated by 1% annual chance flooding for which no BFEs have been
determined.
UNDES (Area of Undesignated
Flood Hazard)
A body of open water, such as a
pond, lake, ocean, etc., located within a community's jurisdictional limits, that has no
defined flood hazard.
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