Album caption and index card: The 75-m (247-ft) St. Helens bridge on State Highway 504. B. After May 18 when it was washed out by the mudflow on the North Fork Toutle River. This steel structure was carried about ½ km (¼ mile) downstream and was partially buried by the mudflow. Man for scale by bridge girder. Cowlitz County, Washington. 1980. Published as figure 406-B in U.S. Geological Survey. Professional paper 1250. 1981.
Handwritten notes on album caption: (Photo by R.L. Schuster)