Umatilla Chemical Depot, U.S. Army facility near the city of Umatilla, Oregon
The Umatilla Chemical Depot is a large military base in northeastern Oregon covering more than 17,000 acres. The landscape consists of open spaces with scattered trees, grass fields, and views of the Umatilla River, while historic storage structures and security fences mark its military past.
The site was established in 1940 during World War II to store military supplies and later became a chemical weapons storage facility during the Cold War. Destruction of these weapons began in 2004 and concluded in 2011, marking the end of an era of weapons storage at this location.
The name refers to the Umatilla region and reflects the military's formative role in local history. Today, the community views the site primarily as a workplace and historical landmark rather than a destination for public exploration.
The site is not freely open to the public and operates as a restricted military facility, though occasional tours and events are offered to locals. Visit during warmer months when the open landscape is most visible and accessible.
The site now hosts unexpected wildlife including antelopes and owls that use the quiet, open land as a natural habitat. This transformation from military installation to wildlife refuge shows how nature has reclaimed the abandoned spaces.
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