What is the 1 % Annual Chance Flood?

Published 10/27/2009 02:03 PM   |    Updated 10/27/2009 02:03 PM
What is the 1 % Annual Chance Flood?
The 1 percent annual chance flood (also known as the 100-Year Frequency Flood or Base Flood) is the flood that has a 1 percent chance of being equaled or exceeded in any given year. Any flood zone that begins with the letter A is subject to the 1 percent annual chance flood.
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