ZONE A:

SFHAs inundated by the 1% AEP (100-year) flood. No BFEs determined.

ZONE AE (formerly A1-30):

SFHAs inundated by the 1% AEP (100-year) flood. BFEs deter mined by detailed study.

ZONE AO:

SFHAs inundated by 1% AEP (100-year) flood depths of 1 to 3 feet, usually sheet flow on sloping terrain. Depths shown are average. For areas of alluvial fan flooding, velocities are also determined. See 44CFR59, “ ".

ZONE AH:

SFHAs inundated by 1% AEP (100-year) flood depths of 1 to 3 feet, usually areas of ponding. BFEs are determined. In Texas, Zone AH usually applies to playas, low areas with no outflow. The only escapes are infiltration and evaporation.

ZONE AR

: SFHAs that result from the decertification of previously accredited flood protection systems that are in the process of being restored to provide a 1% AEP (100-year) or greater level of flood protection.

ZONES AR/A1-30, AR/AE, AR/AH, AR/AO and AR/A (Dual Zones):

SFHAs that result from the decertification of previously accredited flood protection systems that are in the process of being restored to provide a 1% AEP (100-year) or greater level of flood protection. After restoration is complete, these areas will still experience residual flooding from other flooding sources.

ZONE A99:

SFHAs inundated by the 1% AEP (100-year) flood to be protected from the 1% AEP flood by a Federal flood protection system under construction. No BFEs determined.

ZONE V:

SFHAs in coastal areas with velocity hazards (wave action) inundated by the 1% AEP (100-year) flood; no BFEs determined.

ZONE VE (formerly V1-30)

: SFHAs in coastal areas with velocity hazards (wave action) inundated by the 1% AEP (100-year) flood. Base flood elevations determined by detailed study.

ZONE B and ZONE X (shaded):

Areas of 0.2% AEP (500-year) flood; areas subject to the 1% AEP (100-year) flood with average depths of less than 1 foot or with contributing drainage area less than 1 square mile; areas protected by levees from the base flood.

ZONE C and ZONE X (unshaded)

: Areas determined to be outside the 0.2% AEP (500-year) floodplain.

ZONE D

: Areas in which flood hazards are undetermined.