This dataset represents PRONGHORN use areas in Utah as determined by wildlife biologists first during 2001. The data for Carbon, Emery, Grand, Wayne, Garfield, and San Juan were updated by state and federal agency biologists March 2004. Another update was completed in November 2004 in conjunction with the Richfield BLM RMP process. An update in Uintah county by UDWR biologists was completed in January 2006. In May 2006 the dataset was converted from a Critical, High, Substantial and Limited value system to a Crucial/Substantial value system. In 2010, Uintah county biologist added two crucial yearlong areas to the file. Data for use at 1:100,000 scales.