US Army Corps of Engineers
Northwestern Division Website

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Author: Ross Hiner, Dam Safety Program Manager
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  • January

    Ready for the “Big One”? The Corps studies and prepares for the worst case

    Scientists tell us the Pacific Northwest is due for a very large earthquake—possibly as large as magnitude 9.2—from the Cascadia Subduction Zone (CSZ) off the Pacific coast, stretching from northern California to southern British Columbia. The U.S. Army Corps of Engineers, Portland District has been evaluating potential impacts to its dams in the Willamette, Rogue and Columbia River regions to prepare for such an event.