Dewey, UtahDewey is a ghost town in along the Colorado River in southeastern Grand County, Utah, United States.DescriptionOriginally named Kingsferry, it began in the 1880s when Samuel King built and operated a ferry across the Colorado River at its confluence with the Dolores River. A small community soon developed around the ferry, although it never grew large. The town served as a ferry crossing until the Dewey Bridge was constructed in 1916.