Alluvial Fan Flood Plain Mapping

Utah Division of Emergency Management (DEM) is currently working on mapping all alluvial fans in Utah. Alluvial fans are geologic landforms that are subject to infrequent, but destructive flooding events. This resource provides GIS shapefiles of mapped areas of Utah. Alluvial fan mapping has been completed in the Wasatch and Oquirrh Mountains and parts of Cache, Sevier, Salt Lake, Sanpete, Utah and Washington Counties.