Camp Navajo was first established as the Navajo Ordnance Depot in 1942 for support of wartime efforts in the Pacific Theatre. Its mission included the storage, maintenance, and disposal of ammunition and other strategic war supplies, along with soldier training and other support activities. The Depot employed more than 2,000 people during World War II, and was the largest employer in Flagstaff and Coconino County at the time. In 1982, operational control was transferred from the Department of the Army to the Arizona Army National Guard (AZARNG). In 1988, Congress determined that the Army storage mission was no longer required, and the installation was slated for realignment under the Base Realignment and Closure (BRAC) Act. In 1993, the Army storage mission ended, the AZARNG was granted a license for an indefinite period of time, and the name was changed to Camp Navajo. Since 1993, the primary mission of Camp Navajo has been to provide a training site for National Guard, Reserve, and other units.

There is one MMRP site associated with Camp Navajo - The Small Arms Range Safety Fan. The Ammunition Demolition/Burning Area that was initially identified in the MMRP site inventory was determined to be ineligible for the MMRP b/c the area is co-located with the OB/OD Area, and individual sites within the area are being evaluated by either the Installation Restoration Program or OB/OD Area Closure Program.

Camp Navajo is a Army National Guard training installation located near Flagstaff, Arizona. This entry in the UXOInfo.com UXO Site Inventory database is for the MMRP site associated with Camp Navajo. Other database entries for Camp Navjo include an Army Guard RCWM entry and an Army Guard Operational Range entry.

The Small Arms Range Safety Fan was identified and listed as a Closed Range in the 2002 Phase 3 Range Inventory Report and as a MMRP site. A Historical Review was completed in 2004, and a Site Inspection is underway to evaluate the need for further investigation, remedial action, or no further action and site closure.