Zone A

The purpose of this page is to define Zone A, a commonly used term in floodplain management.

Definition/Description

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.

National Flood Insurance Program (NFIP) Requirement

• 60.3 (b) - Zone A Requirements
• 64.3 - Definition

Guidance

• Managing Floodplain Development in Approximate Zone A Areas (FEMA 265)
• Answers to Questions About the National Flood Insurance Program - Flood Hazard Assessments and Mapping Requirements (page 29)
• IS-9 Managing Floodplain Development Through The National Flood Insurance Program (NFIP) (page 3-33)

Related Keywords

• Flood Map
• Flood Zones