Newly incised drainage channel in the Mount St. Helens blast zone, on Smith Creek. In 1980 this drainage channel was approximately 80 feet wide and 20 feet deep. One year later, in 1981, the drainage channel was approximately 200 feet wide and 36 feet deep. Note the remains of trees in the channel and people for scale near center of view. Photo by Lyn Topinka. Skamania County, Washington. September 1980. Page 109, upper photo, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984.
Digital File:cvof0042