The Tooele Depot is a 44,000-acre Army facility that was the primary ammunition storage facility for the Army's western district. The Depot consists of two areas, with different functions, separated by 15 miles of state highway. The 24,000-acre North Area has the headquarters, administrative offices, and acres of storage facilities. Until 1992, the North Depot was a major wheeled vehicle maintenance facility, where every kind of wheeled vehicle in the Army, up to five tons or so, as well as generators, refrigeration units and other field equipment was repaired or remanufactured for reuse and resale. This function of Tooele has been moved, due to the RCRA (Base Realignment and Closure Act) and much of the North Area is a ghost town.The North Area remains an active depot for the storage and disposal of conventional weapons. Over 900 munition storage igloos, spread out across the valley floor, make up two million square feet of secured munition storage space in the North Depot. Also in the North Area is an open burn area for the disposal of surplus and unstable munitions, where open detonations occur sometimes at the rate of two major blasts per day.