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Dredging of the Toutle River after the Mount St. Helens 1980 erupti...

Detailed Description

U.S. Army Corps of Engineers preformed dredging projects on the Toutle, Cowlitz, and Columbia Rivers and by 1987 enough material had been removed to build a 12 lane highway, one-foot thick from New York, NY to San Francisco, CA.


Public Domain.