Though never used by the United States, chemical weapons were stockpiled at a number of Army bases during and after World War II. In 1985, Congress decided that the time had come to turn the aging weapons into a harmless part of history. Bechtel is now involved with two chemical demilitarization projects at U.S. military sites—the Pueblo Chemical Agent-Destruction Pilot Plant in Pueblo, Colorado, and the Blue Grass Chemical Agent-Destruction Pilot Plant in Richmond, Kentucky.
The Pueblo pilot plant will safely destroy 2,611 tons of mustard agent in artillery projectiles and mortar rounds stored at the U.S. Army Pueblo Chemical Depot. As of June 2010, construction of the pilot plant was nearly 50 percent complete. The Blue Grass Chemical Agent-Destruction Pilot Plant will destroy 523 tons of nerve and mustard agent in rockets and artillery projectiles stored at the Blue Grass Army Depot. As of June 2010, design of that plant was complete, and construction was one-quarter complete.
After the chemical weapons at Blue Grass and Pueblo have been destroyed, the plants themselves will be environmentally closed.