Description: 100 year floodplain are areas that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year, derived from FEMA Flood Insurance Rate Maps.
Description: A compilation of best available floodway boundaries. A floodway is the channel of a stream plus any adjacent floodplain area that must be kept free of encroachment so that the 1 percent annual chance flood can be carried without substantial increases in flood heights.