![]() ![]() Major highways, secondary roads, lakes, railroads, streams and other waterways. ![]() The 100-year flood is not a flood event that happens once in a hundred years, rather a flood event that has a 1% chance of occurring every year. It is more precisely defined as the floodplain associated with a flood that has a 1% annual chance of being equaled or exceeded in any given year. ![]() The hazard area or, Special Flood Hazard Area (SFHA), shown on the flood map is known as the 100-year floodplain.
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