CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search From space on Oct. 2008 The Pueblo Chemical Depot is a chemical weapons storage site located in Pueblo County , Colorado , United States . The depot houses 2,611 tons (2,369 metric tons ) of mustard agent in approximately 780,000 munitions, equivalent to about seven percent of the original chemical material stockpile of the United States. [ 1 ] [ 2 ] The current course of action for the Pueblo Chemical Agent-Destruction Pilot Plant , included in the President's Fiscal Year 2010 Budget Request, will allow for acceleration of the project schedule. After systemization and pilot testing of the facility, destruction operations are expected began in spring 2015 with full-scale operations to begin later in the year. Destruction of all munitions is expected to be complete in 2019. The plant w...