Daggett County lies at the lower NE corner of Utah. Its north border abuts the south border of the state of [[Wyoming]] and its east border abuts the west border of the state of [[Colorado]]. Its main geographical features are the [[Uinta Mountains]] which comprise its southwestern portion and delineate part of its southern border, and the [[Green River (Colorado River tributary)|Green River]], which has carved a deep gorge through the east-central part of the county. In 1958 the [[United States Bureau of Reclamation]] took advantage of this natural feature to construct the [[Flaming Gorge Dam]], creating the [[Flaming Gorge Reservoir]], which began filling in 1964.