What is a floodplain?

A floodplain is an area with water and ground surface elevations at or below the base flood or the 100-year frequency flood elevation.  Floodplains may also include detached special flood hazard areas, ponding areas, etc.  The floodplain is also known as the special flood hazard area (SFHA).

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1. What is a floodplain?
2. Can I develop on a floodplain?
3. How do I know if my property is located in a floodplain?