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Agent Destruction 

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A chemical operations crew from the Umatilla Chemical Depot separate rocket 

motor and warhead sections on nine M55 rockets that were sent to an Army 

lab in Picatinny, N.J., for propellant sampling and analysis. 

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The Umatilla Chemical Depot (UMCD) was one of nine Army 

installations in the United States that stored chemical 

weapons. The chemical weapons originally stored at the depot 

consisted of various munitions and ton containers containing 

GB or VX nerve agents or HD blister agent. Stockpile disposal 

operations were successfully concluded in October 2011 using 

high-temperature incineration technology. This technology has 

been used by the Army for more than two decades, safely at 

several sites to successfully dispose of more than 80 percent 

of the nation’s original chemical weapons.

The Army worked in partnership with Oregon state and local 

government agencies, as well as federal agencies like the U.S. 

Environmental Protection Agency and the Centers for Disease 

Control and Prevention, to safeguard the local community and 

protect the environment as we stored and disposed of these 

chemical weapons. The Army safely stored approximately 12 

percent of the nation's original chemical weapons at the 

Umatilla Chemical Depot starting in 1962.

The UMCD opened in 1941. The depot's mission was to store 

and maintain a variety of military items, from blankets to 

ammunition. The depot’s mission, however, changed in 1962 

to include the safe storage of chemical weapons. From 1990 

to 1994 the facility reorganized in preparation for eventual 

closure, shipping all conventional ammunition and supplies to 

other installations.

The Umatilla Chemical Agent Disposal Facility (UMCDF) was 

designed for the sole purpose of destroying the chemical 

weapons stored at the UMCD. Facility construction was 

completed in 2001, and the Army began testing the facility. 

Weapons disposal took place from 2004-2011.

DEQ approves closure plan for 

UMCDF [142KB pdf] 1/18/2013 

Hermiston, OR - Umatilla Chemical Depot, 

Hermiston, Ore. The Umatilla Chemical 

Agent Disposal Facility (UMCDF) has taken 

another step towards successful project 

completion and establishing legacy of 

environmental responsiblity in northeast 

Oregon. 

Ceremony to Mark End of 

Chemical Weapons Stockpile 

[168KB pdf] 3/8/2012 Umatilla, OR - 

The Umatilla Chemical Depot and Umatilla 

Chemical Agent Disposal Facility will hold a 

public ceremony to celebrate the End of 

UMCDF Chemical Demilitarization Operations 

and the Destruction of the UMCD Chemical 

Weapons Stockpile. 

UMCDF Weekly Update [126KB pdf] 

11/17/2011 Hermiston, OR - Umatilla 

Chemical Agent Disposal Facility weekly 

project update week ending November 18, 

2011. 

UMCDF Weekly Update [109KB pdf] 

11/3/2011 Hermiston, OR - Umatilla 

Chemical Agent Disposal Facility weekly 

project update for week ending November 4, 

2011. 

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Reports

Umatilla, OR

The U.S. Army Chemical Materials Activity (CMA) - Umatilla, OR Page 1 of 2

http://www.cma.army.mil/umatilla.aspx 4/20/2015
Umatilla Chemical Agent Disposal Facility Safety Milestone 

On 15 January 2010, Washington Demilitarization Company, LLC announced the UMCDF team 

achieved the safety milestone of six million man-hours of continuous effort without an accident 

resulting in a lost day away from work. This is the first time UMCDF has reached the six million manhour mark and comes after a calendar year of 2009 that finished with a recordable injury rate of .70. 

This achievement reflects highly upon the UMCDF, the U.S. Army Chemical Materials Agency, and the 

U.S. Army.

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