The U.S. Army Pueblo Chemical Depot originally stored 2,613.2 U.S. tons of the blister agent mustard in projectiles and mortar rounds.
Original Pueblo Stockpile
2,613
U.S. Tons of Mustard Agent

Chemical Weapons Destruction Technologies
MAIN PLANT
START DATE: SEPT. 7, 2016
END DATE: JUNE 16, 2023

Neutralization Followed by Biotreatment
The Assembled Chemical Weapons Alternatives program, the U.S. Army Pueblo Chemical Depot and the community worked together to select neutralization followed by biotreatment to destroy the chemical weapons stored at the depot.
EXPLOSIVE DESTRUCTION TECHNOLOGY
START DATE: MARCH 18, 2015
END DATE: DEC. 5, 2018

Explosive Destruction System
The Explosive Destruction System, or EDS, augmented the pilot plant to destroy a number of problematic munitions that could not be easily destroyed by the main plant’s automated equipment. During two campaigns from March 2015 to December 2018, the EDS eliminated 951 items resulting in 3.82 tons of mustard agent destroyed.
STATIC DETONATION CHAMBER
START DATE: FEB. 19, 2022
END DATE: JUNE 22, 2023

Static Detonation Chamber
The Static Detonation Chamber supported the chemical weapons destruction progress at the Pueblo Chemical Agent-Destruction Pilot Plant. Three SDC units augmented the main plant by eliminating some 4.2-inch mortar rounds and overpacked problematic munitions.
Upcoming Meetings
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Permitting Working Group and Colorado Chemical Demilitarization Citizens’ Advisory Commission Meetings will be held on Feb. 26, 2025, at 3 p.m. MT.
Online platform: Zoom
Phone: 1 (719) 359-4580 Meeting ID: 84351934182#For information, please contact the Pueblo Chemical Stockpile Outreach staff at (520) 687-1713 or pueblooutreach@iem.com
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Permitting Working Group and Colorado Chemical Demilitarization Citizens’ Advisory Commission Meetings will be held on April 30, 2025, at 3 p.m. MT.
Online platform: Zoom
Phone: 1 (719) 359-4580 Meeting ID: 84351934182#For information, please contact the Pueblo Chemical Stockpile Outreach staff at (520) 687-1713 or pueblooutreach@iem.com
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Permitting Working Group and Colorado Chemical Demilitarization Citizens’ Advisory Commission Meetings will be held on June 25, 2025, at 3 p.m. MT.
Online platform: Zoom
Phone: 1 (719) 359-4580 Meeting ID: 84351934182#For information, please contact the Pueblo Chemical Agent-Destruction Pilot Plant outreach staff at (520) 687-1713 or pueblooutreach@iem.com