309th Aerospace Maintenance and Regeneration Group

The 309th Aerospace Maintenance and Regeneration Group, often called The Boneyard, is a United States Air Force aircraft and missile storage and maintenance facility in Tucson, Arizona, located on Davis-Monthan Air Force Base. AMARG was previously Aerospace Maintenance and Regeneration Center, AMARC, the Military Aircraft Storage and Disposition Center, MASDC, and was established after World War II as the 3040th Aircraft Storage Group.AMARG takes care of nearly 4,000 aircraft, which makes it the largest aircraft storage and preservation facility in the world. An Air Force Materiel Command unit, the group is under the command of the Ogden Air Logistics Complex at Hill Air Force Base, Utah. AMARG was originally meant to store excess Department of Defense and Coast Guard aircraft, but has in recent years been designated the sole repository of out-of-service aircraft from all branches of the US government.HistoryAMARG was established in 1946 as the 4105th Army Air Force Base Unit to house B-29 and C-47 aircraft. Davis-Monthan Air Force Base was chosen because of Tucson's low humidity, infrequent rainfall, alkaline soil and high altitude of 2550ft, reducing rust and corrosion. The hard soil makes it possible to move aircraft around without having to pave the storage areas.