20250303 13252600 1.0 TRUE FEMA Flood Fema Flood Dataset for Whatcom County, WA including the 100 Yr Floodplain & Floodway. The Fema 100 Yr Floodplain are areas that will be inundated by a flood event having a 1-percent chance of being equaled or exceeded in any given year, as derived from FEMA Flood Insurance Rate Maps. A "Regulatory Floodway" means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height. Communities must regulate development in these floodways to ensure that there are no increases in upstream flood elevations. Federal Emergency Management Agency (FEMA) Whatcom FEMA Flood Whatcom NHD Data (Flowlines)