Loma Prieta, California, Earthquake October 17, 1989. Oakland. Pancaked upper deck of the Cypress viaduct of Interstate 880. Guardrail on the right is on the lower deck. Slide III-8, U.S. Geological Survey Open-File Report 90-547. Open File-90-545

Digital File:whg00006

ID. Wilshire, H.G. 6ct