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Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)
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      Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)


      Mission: The safe elimination of chemical weapons at Pueblo and Blue Grass by Sept. 30, 2023

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  • BLUE GRASS
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      Blue Grass Chemical Agent-Destruction Pilot Plant (BGCAPP)

      BGCAPP is safely destroying the chemical weapons stockpile currently in storage at the Blue Grass Army Depot near Richmond, Kentucky.

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  • PUEBLO
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      Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP)

      PCAPP is safely destroying the chemical weapons stockpile currently in storage at the U.S. Army Pueblo Chemical Depot in Colorado.

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PCAPP Destruction information
PCAPP Destruction information

The U.S. Army Pueblo Chemical Depot originally stored more than 2,600 tons of the blister agent mustard in projectiles and mortar rounds.

Storage igloos at  The U.S. Army Pueblo Chemical Depot 155mm projectile 155mm Projectiles 105mm Projectiles 105mm projectile 4.2-inch Mortar Rounds 4.2-inch mortar round CAMPAIGN COMPLETE: SEPT. 5, 2020 CAMPAIGN UNDERWAY CAMPAIGN UNDERWAY 155 155mm Projectiles The 155mm projectile is a World War II-type munition. Both the M104 and M110 projectiles contain approximately 12 lbs. of blister (mustard) agent. Colored bands, signifying the chemical agent contained in the munition, mark the outside of the projectile casings. The shell contains an adapter and burster casing that screw into the nose of the shell, also allowing a fuze to be screwed into the nose of the projectile. CLOSE PCAPP 155mm projectile CAMPAIGN INITIATED: SEPT. 7, 2016 CAMPAIGN COMPLETED: SEPT. 5, 2020 105 105mm Projectiles The 105mm projectile is a World War II-type munition. The projectile contains approximately 3 lbs. of blister (mustard) agent. Colored bands, signifying the chemical agent within the munition, mark the outside of the projectile casings. The shell contains an adapter and booster casing that screw into the nose of the shell, allowing a fuze to be screwed into the nose of the projectile. CLOSE PCAPP 105mm projectile CAMPAIGN INITIATED: DEC. 11, 2020 4.2 4.2-inch Mortar Rounds The 4.2-inch mortar round, produced in the United States, consists of a one-piece forged steel-case projectile body with fuze, burster and tail assembly. Each munition contains approximately 6 lbs. of agent that is sealed inside with a steel burster well. The shell contains a perforated vane assembly welded to the inside of the body, designed to accommodate the burster tube extending from the fuze. The tail assembly consists of a pressure plate and rotating disk, propelling charge, cartridge container, ignition cartridge and striker nut assembly. CLOSE PCAPP 4.2-inch mortar round CAMPAIGN INITIATED: FEB. 19, 2022

PCAPP aerial image October 2019. PCAPP is safely destroying the stockpile of chemical weapons in storage at the U.S. Army Pueblo Chemical Depot in Colorado. Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) *Information as of 7 May 2022. Plant at a Glance

Chemical Weapons Destruction Technologies

Technologies chosen to safely destroy the Pueblo stockpile.

MAIN PLANT

START DATE: SEPT. 7, 2016
STATUS: OPERATIONAL
PCAPP ordnance technician uses lift assist in Enhanced Reconfiguration Building

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.

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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.

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STATIC DETONATION CHAMBER

START DATE: FEB. 19, 2022
STATUS: PHASE II TRIAL BURN TESTING
Three Static Detonation Chamber (SDC) units will augment the main plant by destroying all problematic munitions, including the 4.2-inch mortar rounds.

Static Detonation Chamber

The Static Detonation Chamber (SDC) complex is part of the chemical weapons destruction process at the Pueblo Chemical Agent-Destruction Pilot Plant. Three thermally heated detonation chambers in the SDC complex are augmenting the main plant by eliminating 4.2-inch mortar rounds and overpacked munitions.

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Upcoming Meetings

Permitting Working Group, Biotreatment Utilization Group and Colorado Citizens’ Advisory Commission Meetings will be held online on May 25, 2022, at 2 p.m. MDT.

Computer: Zoom – https://us02web.zoom.us/j/85125795932
Phone: 1 346 248 7799 Meeting ID: ‪851 2579 5932#

For information, please contact the Pueblo Chemical Stockpile Outreach Office at (719) 546‑0400, or pueblooutreach@iem.com

There will be a series of public meetings to discuss multiple Permit Modification Requests on June 1, 2022, starting at 1:30 p.m. MDT. The in-person meeting will be held at the Pueblo Chemical Stockpile Outreach Office, 104 W. B St., Pueblo.

For information, please contact the Pueblo Chemical Stockpile Outreach Office at (719) 546‑0400, or pueblooutreach@iem.com

Permitting Working Group, Biotreatment Utilization Group and Colorado Citizens’ Advisory Commission Meetings will be held on June 29, 2022.
For information, please contact the Pueblo Chemical Stockpile Outreach Office at (719) 546‑0400, or pueblooutreach@iem.com

Recent PCAPP News

Agent-filled 4.2-inch mortar rounds are monitored during Static Detonation Chamber agent trial testing operations at the Pueblo Chemical Agent-Destruction Pilot Plant.

Static Detonation Chamber Trial Testing Concludes

13 May 2022
Pueblo Chemical Agent-Destruction Pilot Plant Monthly Recap – April 2022

Pueblo Chemical Agent-Destruction Pilot Plant Monthly Recap – April 2022

4 May 2022
Colleen Brisnehan, the Colorado Department of Public Health and Environment hazardous waste program manager, is the newest appointed member of the Colorado Chemical Demilitarization Citizens' Advisory Commission.

Colorado Commission Welcomes New Member

4 May 2022
PCAPP Monthly Recap - March 2022

PCAPP Monthly Recap – March 2022

5 April 2022

Recent PCAPP Videos

April 27 Colorado Chemical Demilitarization Citizens’ Advisory Commission Meeting (2022)

April 27 Colorado Chemical Demilitarization Citizens’ Advisory Commission Meeting (2022)

28 April 2022
Feb. 23 Colorado Chemical Demilitarization Citizens’ Advisory Commission Meeting (2022)

Feb. 23 Colorado Chemical Demilitarization Citizens’ Advisory Commission Meeting (2022)

24 February 2022
Environmental Experts Explain Static Detonation Chamber Safety

Environmental Experts Explain Static Detonation Chamber Safety

24 February 2022
Pueblo Static Detonation Chamber Units Start Destroying Mustard Rounds

Pueblo Static Detonation Chamber Units Start Destroying Mustard Rounds

23 February 2022
“I enjoy the community we have within PCAPP as well as the opportunity to rid the world of chemical weapons.”
Thomas P.
Ordnance Technician
Thomas P., Ordnance Technician, PCAPP
“The people I work with make my job pleasant. We handle business in a serious fashion, but we enjoy each other’s company.”
Javon N.
Ordnance Technician
Javon N., Ordnance Tech, PCAPP
“There is a long history behind these munitions, and they’ve been stockpiled for generations. Now we get to play a part in ridding the world of them.”
Paul N.
Ordnance Technician
Paul N., Ordnance Technician, PCAPP
“It’s never hard to come in to work because I have good people around me.”
Eric E.
Ordnance Technician
Eric E., Ordnance Technician, PCAPP

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Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)