Areas subject to inundation by 1-percent-annual-chance shallow flooding (usually areas of ponding) where average depths are between one and three feet. Base Flood Elevations (BFEs) derived from detailed hydraulic analyses are shown in this zone. Mandatory flood insurance purchase requirements and floodplain management standards apply.
- Answers to Questions About the National Flood Insurance Program - Flood Insurance Assesments and Mappingt Requirements
- IS-9 Managing Floodplain Development Through The National Flood Insurance Program (NFIP) (page 3-33) (PDF 8MB, TXT 1MB) (entire document)