Bechtel led the team that destroyed the chemical weapons stockpile at the U.S. Army Pueblo Chemical Depot in Pueblo, Colorado.
Though never used by the United States, chemical weapons were stockpiled by the U.S. Army at a number of bases during and after World War II. Bechtel was contracted by the Department of Defense, Program Executive Office, Assembled Chemical Weapons Alternatives, to support their mission of meeting national commitments under the Chemical Weapons Convention to destroy the nation’s chemical weapons stockpile before September 2023.
The Bechtel Pueblo Team, which includes Bechtel, Amentum, and Battelle was awarded the contract in 2002 to design, build, test, and operate the Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP).
The Bechtel team brought expertise and innovation in implementing first-of-a-kind technology to safely destroy the munitions at the Pueblo Chemical Depot. Unlike other demilitarization facilities, PCAPP dismantled munitions using a first-of-a-kind robotic process.
The Bechtel-led team destroyed more than 780,000 projectiles and mortars holding 2,613 tons of mustard agent during three munitions destructions campaigns. The technology used to safely destroy the weapons included neutralization followed by biotreatment and explosive destruction technologies. These munitions were from the WWII era and were stored at the Pueblo Chemical Depot.
The final munition at the Pueblo Chemical Depot was destroyed in June 2023.
Now that the entire stockpile in Colorado has been destroyed, PCAPP will enter the closure phase, which will continue for two to three years. This mission includes the disposal of all secondary wastes, decontamination and decommissioning of facilities and equipment, disposition of property, demolition of certain facilities, and closure of government contracts and environmental permits in accordance with laws and regulations.