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.

The operational range area of Camp Navajo includes a RCRA permitted Open Burn / Open Detonation (OB/OD) area. The OB/OD range is being addressed under the installation restoration program as part of the RCRA permit.

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 Operational Range area of Camp Navajo. Other database entries for Camp Navajo include an Army Guard MMRP entry and a RCWM entry.

The operational range area associated with Camp Navajo includes an OB/OD area located in the southern part of Camp Navajo and estimated to be between 2,000 to 5,000 acres. The OB/OD area is under a RCRA permit administered by the State.

Twenty vadose zone monitor wells were installed in the OB/OD area around Navy Army Depot (NAAD) 02 to prepare the site for post-closure under the Resource Conservation and Recovery Act (RCRA). Final Munitions of Explosive Concern (MEC) remediation activities have started and will continue until September 2009. The site will begin to transfer to the Arizona Department of Environmental Quality’s (ADEQ) Hazardous Waste Permits Unit to undergo RCRA post-closure. Remediation activities planned include a surface sweeps and MEC removal near NAAD 02, the screening and backfilling of stockpiled soil into NAAD 02, and the submission of several decision documents to complete the closure.