Dugway Proving Ground (DPG) is a US Army facility located approximately 85 miles (140 km) southwest of Salt Lake City, Utah in southern Tooele County and just north of Juab County. It encompasses 801,505 acres (3,243 km², or 1,252 sq mi) of the Great Salt Lake Desert, an area the size of the state of Rhode Island, and is surrounded on three sides by mountain ranges. It had a resident population of 795 persons as of the 2010 United States Census, all of whom lived in the community of Dugway, Utah, at its extreme eastern end. The name "Dugway" comes from a technique of digging a trench into a hillside to create a flat surface along which a wagon can travel. Dugway Proving Ground is located 13 miles south of the 2,624 sq mi Utah Test and Training Range.