Floodplains and river terraces

A floodplain is land which is susceptible to be inundated  by water of any source. A floodway is the stream channel and that portion of the adjacent floodplain that must remain open to permit the passage of the base flood. A One Hundred Year Flood is the flood elevation that has a one-percent chance of being equaled or exceeded in any given year, also known as the “base flood”.

The Utah Division of Emergency Management’s Hazards and Mitigation Section help identify floodplains and mitigate flooding.

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