Flood Zone Definitions

Flood Zone

Flood Damage Prevention Ordinance

The Flood Damage Prevention Ordinance outlines the procedure for minimizing damage to property from floods.


Flood Zone Definition

Zone

Description

A

Areas subject to inundation by the 1-percent-annual-chance flood event generally determined using approximate methodologies. Because detailed hydraulic analyses have not been performed, no Base Flood Elevations (BFEs) or flood depths are shown. Mandatory flood insurance purchase requirements and floodplain management standards apply.

AE

Areas subject to inundation by the 1-percent-annual-chance flood event determined by detailed methods. Base Flood Elevations (BFEs) are shown. Mandatory flood insurance purchase requirements and floodplain management standards apply.

X

Minimal risk area outside the 1-percent and .2-percent-annual-chance flood plains.  No mandatory flood insurance purchase requirements apply, but coverage is available in participating communities.

D

Unstudied areas where flood hazards are undetermined but flooding is possible. No mandatory flood insurance purchase requirements apply, but coverage is available in participating communities.