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The purpose of this page is to define Zone AO, a commonly used term in floodplain management. To explore other common floodplain management terms access the NFIP Policy Index.
Areas subject to inundation by 1-percent-annual-chance shallow flooding (usually sheet flow on sloping terrain) where average depths are between one and three feet. Average flood depths derived from detailed hydraulic analyses are shown in this zone. Mandatory flood insurance purchase requirements and floodplain management standards apply.
Some Zone AO have been designated in areas with high flood velocities such as alluvial fans and washes. Communities are encouraged to adopt more restrictive rquirements for these areas.
originally posted by: another_lurker
I found this information on the Liam Douglas facebook page, and he has also made a youtube video which is over 30 mins. long to read this wording and talk about it. He really needs to replace his battery in his smoke detector, the beeping was driving me crazy through the video.