Umatilla Army Depot, Oregon

Initially christened the Umatilla Army Ordnance Depot at the time of its founding in 1941, the site was peppered with 1,000 storage bunkers spread over its 19,700 acres, which were used to secure conventional munitions. In 1962, the facility began to store chemical weapons as well, coincident with its name being changed to the Umatilla Army Depot. By 1996, the facility was being used exclusively to store chemical weapons (amounting to around 12% of the total U.S. stockpile), and as a consequence, the name was changed yet again to the Umatilla Chemical Depot. In 2001, a separate facility called the Umatilla Chemical Agent Disposal Facility was created. Destruction of all chemical weapons stored on-site began in 2004 (as mandated by the Chemical Weapons Convention of 1997), and by 2011, all chemical agents had been successfully destroyed. The Army then transferred ownership of a portion of the base to the Oregon Military Department, for use by the Oregon National Guard, once environmental remediation had been completed. Possible civilian applications for the remainder, include a wildlife refuge, as well as an industrial park.