The Pueblo Chemical Agent-Destruction Pilot Plant is safely destroying the remaining U.S. chemical weapons stockpile stored at the U.S. Army Pueblo Chemical Depot in Colorado. The depot originally stored 2,613 U.S. tons of the blister agent mustard in projectiles and mortar rounds. PCAPP is using neutralization followed by biotreatment and Static Detonation Chamber units to destroy the munitions. Agent destruction operations began March 18, 2015, and are scheduled to be completed by Dec. 31, 2023.
For the Media:
Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) Completes Safe Destruction of More Than 380,000 105mm Mustard Agent Projectiles
The Pueblo Chemical Agent-Destruction Pilot Plant, known as PCAPP, is destroying the chemical weapons stored at the U.S. Army Pueblo Chemical Depot (PCD) in Colorado. The following video clips show how projectiles containing mustard agent were processed inside the main plant.
- (00:00- 00:10)
Toxic materials handlers prepare 105mm projectiles for transportation to PCAPP, where they will be destroyed. - (00:11-00:23)
Ordnance technician clips and removes metal banding from palletized 105mm projectiles so the munitions can be destroyed by PCAPP’s automated system. - (00:24-00:45)
An ordnance technician uses a lift assist to place a 105mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP (wide shot). - (00:46-01:03)
An ordnance technician uses a lift assist to place a 105mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP (close-up).
(01:04- 01:07)
A 105mm projectile moves down a conveyor into the Projectile/Mortar Disassembly System. - (1:08-1:33)
Inside the Agent Processing Building, a robot in the Munitions Washout System (MWS) lifts a 105mm projectile from a Cavity Access Machine after the munition has been drained and rinsed to remove mustard agent for neutralization. The robot places the munition onto the drained munition weigh station to ensure removal of agent. Next, an infeed conveyor will take it through the Munitions Treatment Unit (MTU) to complete the decontamination of munitions bodies. The MTU elevates the temperature of the munition to at least 1,000 degrees Fahrenheit for at least 15 minutes.
Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) 50% Mustard Agent Destroyed
The Pueblo Chemical Agent-Destruction Pilot Plant, known as PCAPP, is destroying the chemical weapons stored at the U.S. Army Pueblo Chemical Depot (PCD) in Colorado. The following video clips show how projectiles containing mustard agent were processed inside the main plant.
- (0:00-0:20)
An ordnance technician uses a lift assist to place a 155mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP. - (0:21-0:40)
Inside the Agent Processing Building, a robot in the Munitions Washout System (MWS) lifts a 155mm projectile from a Cavity Access Machine after the munition has been drained and rinsed to remove mustard agent for neutralization. The robot places the munition onto the drained munition weigh station to ensure removal of agent. Next, an infeed conveyor will take it through the Munitions Treatment Unit (MTU) to complete the decontamination of munitions bodies. The MTU elevates the temperature of the munition to at least 1,000 degrees Fahrenheit for at least 15 minutes. - (0:41-0:58)
Inside the Agent Processing Building, a robot in the Munitions Washout System (MWS) lifts a 155mm projectile from a feed conveyor. The energetics which propel and explode the round have already been removed in the Enhanced Reconfigure Building. The robot places the munition nose down in a Cavity Access Machine to remove agent from the cavity of the projectile. - (0:59-1:32)
(HD Video) An ordnance technician removes a 105mm projectile off a conveyor belt using a lift assist in the Reconfiguration Room of the Enhanced Reconfiguration Building at PCAPP and places the munition in a holding pallet with other munitions for transport back to PCD to await processing at a later date. - (1:33-1:49)
(HD Video) Munitions are placed on a conveyor in the Enhanced Reconfiguration Building as they make their way from unboxing in the Receiving and Traveling Area to a Vapor Containment Room. - (1:50-2:29)
Closed Circuit video shows an ordnance technician uses a lift assist to place a 155mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP. - (2:30-2:45)
Inside an Explosion Containment Room, the Projectile/Mortar Disassembly system removes the nose closure, or lifting lug, from a 155 mm projectile. - (2:46-2:56)
Inside an Explosion Containment Room, the Projectile/Mortar Disassembly system removes the nose closure, while a robotic arm lifts a munition from the burster rod removal station. - (2:57-3:07)
Inside an Explosion Containment Room, the robotic arm lifts the 155mm from the station and places it onto a conveyor. - (3:07-3:23)
Ordnance technicians wearing Demilitarization Protective Ensemble gear prepare secondary waste for disposal.
Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) Operations
The Pueblo Chemical Agent-Destruction Pilot Plant, known as PCAPP, is destroying the chemical weapons stored at the U.S. Army Pueblo Chemical Depot in Colorado. The following video clips show the first 155mm projectiles containing mustard agent being transported from storage igloos at the depot to the plant. The first set of chemical weapons was processed inside the plant on Sept. 7, 2016.
- (0:00-0:18)
Chemical Material Handlers place the first set of 155mm projectiles onto a pallet for transport from the Pueblo Chemical Depot’s storage igloos to PCAPP. - (0:19-0:44)
Technicians place an overpacked pallet of agent-filled munitions into the bed of a Modified Ammunition Vehicle for transport from the Pueblo Chemical Depot’s storage igloos to PCAPP. - (0:45-1:36)
An ordnance technician uses a lift assist to place the first 155mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP. - (1:37-1:52)
Inside an Explosive Containment Room, the Projectile/Mortar Disassembly system removes the nose closure, or fuze, from a munition. - (1:53-2:10)
Inside an Explosive Containment Room, the Projectile/Mortar Disassembly system removes the nose closure, or fuze, from a munition, while a robotic arm lifts a munition from the burster rod removal station. - (2:11-2:28)
Inside an Explosive Containment Room, the Projectile/Mortar Disassembly lifts a 155mm projectile and places it onto a conveyor.
Pueblo Chemical Agent-Destruction Pilot Plant Systemization
Prior to operations at the Pueblo Chemical Agent-Destruction Pilot Plant, all machinery, equipment and processes were operated and tested with water or simulants to ensure each functions together as an integrated system. The following video clips show the plant, as well as recent testing and training activities at this first-of-a-kind facility.
- (0:00-0:09)
Building exteriors. - (0:10-0:30)
Workers using lift assist to move ACWA Test Equipment. - (0:31-0:49)
Workers training in Demilitarization Protective Ensemble. - (0:50-1:04)
Projectile/Mortar Disassembly removing mock energetics from inert munitions. - (1:04-1:27)
Munitions Washout System testing inert munitions. - (1:28-1:39)
Control room workers.
PCAPP Fact Sheets:
- Facts: Acronyms Commonly Used in the Chemical Weapons Destruction Program
- Facts: Biotreatment Process
- Facts: Chemical Munitions in Pueblo
- Facts: Chemical Weapons Destruction at the U.S. Army Pueblo Chemical Depot
- Facts: Colorado Chemical Demilitarization Citizens’ Advisory Commission
- Facts: Hydrolysate Overview
- Facts: Improved Cavity Access Machines
- Facts: Munitions Handling Lift Assist
- Facts: Munitions Treatment Unit
- Facts: Munitions Washout System
- Facts: Neutralization Followed by Biotreatment
- Facts: Partners in the Pueblo Chemical Weapons Destruction Program
- Facts: PCAPP Training Facility
- Facts: Personnel Reliability Program
- Facts: Projectile/Mortar Disassembly System
- Facts: Static Detonation Chamber
- Facts: The Treatment or Disposal of Secondary Wastes
- Facts: Understanding Operations Terminology
- Facts: Water for Weapons Destruction: Source, Quantity, Groundwater Protection
Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) Completes Safe Destruction of More Than 380,000 105mm Mustard Agent Projectiles
The Pueblo Chemical Agent-Destruction Pilot Plant, known as PCAPP, is destroying the chemical weapons stored at the U.S. Army Pueblo Chemical Depot (PCD) in Colorado. The following video clips show how projectiles containing mustard agent were processed inside the main plant.
- (00:00- 00:10)
Toxic materials handlers prepare 105mm projectiles for transportation to PCAPP, where they will be destroyed. - (00:11-00:23)
Ordnance technician clips and removes metal banding from palletized 105mm projectiles so the munitions can be destroyed by PCAPP’s automated system. - (00:24-00:45)
An ordnance technician uses a lift assist to place a 105mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP (wide shot). - (00:46-01:03)
An ordnance technician uses a lift assist to place a 105mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP (close-up).
(01:04- 01:07)
A 105mm projectile moves down a conveyor into the Projectile/Mortar Disassembly System. - (1:08-1:33)
Inside the Agent Processing Building, a robot in the Munitions Washout System (MWS) lifts a 105mm projectile from a Cavity Access Machine after the munition has been drained and rinsed to remove mustard agent for neutralization. The robot places the munition onto the drained munition weigh station to ensure removal of agent. Next, an infeed conveyor will take it through the Munitions Treatment Unit (MTU) to complete the decontamination of munitions bodies. The MTU elevates the temperature of the munition to at least 1,000 degrees Fahrenheit for at least 15 minutes.
Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) 50% Mustard Agent Destroyed
The Pueblo Chemical Agent-Destruction Pilot Plant, known as PCAPP, is destroying the chemical weapons stored at the U.S. Army Pueblo Chemical Depot (PCD) in Colorado. The following video clips show how projectiles containing mustard agent are processed inside the main plant.
- (0:00-0:20)
An ordnance technician uses a lift assist to place a 155mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP. - (0:21-0:40)
Inside the Agent Processing Building, a robot in the Munitions Washout System (MWS) lifts a 155mm projectile from a Cavity Access Machine after the munition has been drained and rinsed to remove mustard agent for neutralization. The robot places the munition onto the drained munition weigh station to ensure removal of agent. Next, an infeed conveyor will take it through the Munitions Treatment Unit (MTU) to complete the decontamination of munitions bodies. The MTU elevates the temperature of the munition to at least 1,000 degrees Fahrenheit for at least 15 minutes. - (0:41-0:58)
Inside the Agent Processing Building, a robot in the Munitions Washout System (MWS) lifts a 155mm projectile from a feed conveyor. The energetics which propel and explode the round have already been removed in the Enhanced Reconfigure Building. The robot places the munition nose down in a Cavity Access Machine to remove agent from the cavity of the projectile. - (0:59-1:32)
(HD Video) An ordnance technician removes a 105mm projectile off a conveyor belt using a lift assist in the Reconfiguration Room of the Enhanced Reconfiguration Building at PCAPP and places the munition in a holding pallet with other munitions for transport back to PCD to await processing at a later date. - (1:33-1:49)
(HD Video) Munitions are placed on a conveyor in the Enhanced Reconfiguration Building as they make their way from unboxing in the Receiving and Traveling Area to a Vapor Containment Room. - (1:50-2:29)
Closed Circuit video shows an ordnance technician uses a lift assist to place a 155mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP. - (2:30-2:45)
Inside an Explosion Containment Room, the Projectile/Mortar Disassembly system removes the nose closure, or lifting lug, from a 155 mm projectile. - (2:46-2:56)
Inside an Explosion Containment Room, the Projectile/Mortar Disassembly system removes the nose closure, while a robotic arm lifts a munition from the burster rod removal station. - (2:57-3:07)
Inside an Explosion Containment Room, the robotic arm lifts the 155mm from the station and places it onto a conveyor. - (3:07-3:23)
Ordnance technicians wearing Demilitarization Protective Ensemble gear prepare secondary waste for disposal.
Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) Operations
The Pueblo Chemical Agent-Destruction Pilot Plant, known as PCAPP, is destroying the chemical weapons stored at the U.S. Army Pueblo Chemical Depot in Colorado. The following video clips show the first 155mm projectiles containing mustard agent being transported from storage igloos at the depot to the plant. The first set of chemical weapons was processed inside the plant on Sept. 7, 2016.
- (0:00-0:18)
Chemical Material Handlers place the first set of 155mm projectiles onto a pallet for transport from the Pueblo Chemical Depot’s storage igloos to PCAPP. - (0:19-0:44)
Technicians place an overpacked pallet of agent-filled munitions into the bed of a Modified Ammunition Vehicle for transport from the Pueblo Chemical Depot’s storage igloos to PCAPP. - (0:45-1:36)
An ordnance technician uses a lift assist to place the first 155mm projectile onto a conveyor inside the Enhanced Reconfiguration Building at PCAPP. - (1:37-1:52)
Inside an Explosive Containment Room, the Projectile/Mortar Disassembly system removes the nose closure, or fuze, from a munition. - (1:53-2:10)
Inside an Explosive Containment Room, the Projectile/Mortar Disassembly system removes the nose closure, or fuze, from a munition, while a robotic arm lifts a munition from the burster rod removal station. - (2:11-2:28)
Inside an Explosive Containment Room, the Projectile/Mortar Disassembly lifts a 155mm projectile and places it onto a conveyor.
Pueblo Chemical Agent-Destruction Pilot Plant Systemization
Prior to operations at the Pueblo Chemical Agent-Destruction Pilot Plant, all machinery, equipment and processes were operated and tested with water or simulants to ensure each functions together as an integrated system. The following video clips show the plant, as well as recent testing and training activities at this first-of-a-kind facility.
- (0:00-0:09)
Building exteriors. - (0:10-0:30)
Workers using lift assist to move ACWA Test Equipment. - (0:31-0:49)
Workers training in Demilitarization Protective Ensemble. - (0:50-1:04)
Projectile/Mortar Disassembly removing mock energetics from inert munitions. - (1:04-1:27)
Munitions Washout System testing inert munitions. - (1:28-1:39)
Control room workers.
PCAPP Aerial Photo:

PCAPP Fact Sheets:
- Facts: Acronyms Commonly Used in the Chemical Weapons Destruction Program
- Facts: Biotreatment Process
- Facts: Chemical Munitions in Pueblo
- Facts: Chemical Weapons Destruction at the U.S. Army Pueblo Chemical Depot
- Facts: Colorado Chemical Demilitarization Citizens’ Advisory Commission
- Facts: Hydrolysate Overview
- Facts: Improved Cavity Access Machines
- Facts: Munitions Handling Lift Assist
- Facts: Munitions Treatment Unit
- Facts: Munitions Washout System
- Facts: Neutralization Followed by Biotreatment
- Facts: Partners in the Pueblo Chemical Weapons Destruction Program
- Facts: PCAPP Training Facility
- Facts: Personnel Reliability Program
- Facts: Projectile/Mortar Disassembly System
- Facts: Static Detonation Chamber
- Facts: The Treatment or Disposal of Secondary Wastes
- Facts: Understanding Operations Terminology
- Facts: Water for Weapons Destruction: Source, Quantity, Groundwater Protection
More PCAPP Resources
To learn more about the PCAPP mission of destroying the U.S. chemical weapons stockpile in Pueblo, click on the links below to access press releases, news articles and videos.
Contact us:
For media inquiries about the Pueblo Chemical Agent-Destruction Pilot Plant, contact:
Ron Eccher
Phone: (719) 296-5905
Email: ronald.eccher@iem.com
Pueblo Chemical Stockpile Outreach Office
Phone: (719) 546-0400
Email: PuebloOutreach@iem.com