The Portland Bridge Book

From the back cover: "This edition delivers: 150 historic and large format contemporary photographs, many published for the first time; annotated drawings by Joseph Boquiren showing Portland's movable bridges in operation; "How and Why Bridges are Built" written by Fremont Bridge field engineer Ed Wortman; expanded and localized glossary of bridge terms; Portland transportation history timeline, truss patterns, bridge poetry, lyrics; new chapter about the Sauvie Island bridge, the first new river bridge built by Multnomah County in 50 years."