Value: AH, Label: Zone AH - An area inundated by 1% annual chance flooding (usually an area of ponding), for which BFEs have been determined; flood depths range from 1 to 3 feet Description: N/A Symbol:
Value: AO, Label: Zone AO - An area inundated by 1% annual chance flooding (usually sheet flow on sloping terrain), for which average depths have been determined; flood depths range from 1 to 3 feet Description: N/A Symbol:
Value: X,0.2 PCT ANNUAL CHANCE FLOOD HAZARD Label: 500 year floodplain - Areas of 500-year flood; An area inundated by 0.2% annual chance flooding Description: N/A Symbol:
Value: X,AREA OF MINIMAL FLOOD HAZARD Label: Zone X - Areas determined to be outside 500-year floodplain determined to be outside the 1% and 0.2% annual chance floodplains Description: N/A Symbol:
Description: Selected watersheds in Mesa County, bordering the Colorado River.From https://www.milwaukeeriverkeeper.org/whats-a-river-basin-whats-a-watershed/: A watershed is simply the area of land that catches rain and snow and drains or seeps into a marsh, stream, river, lake or groundwater. Both river basins and watersheds are areas of land that drain to a particular water body, such as a lake, stream, river or estuary. In a river basin, all the water drains to a large river. The term watershed is used to describe a smaller area of land that drains to a smaller stream, lake or wetland. There are many smaller watersheds within a river basin.