Bridge (with a link to a Microsoft Word document about the bridge), from the website of the state of Oregon Photo of 1888 suspension bridge, from a bridge fan's website Through arch bridges in the United States Bridges completed in 1922 Buildings and structures in Oregon City, Oregon West Linn, Oregon Road bridges on the National Register of Historic Places in Oregon National Register of Historic Places in Clackamas County, Oregon U.S. Route 99 Bridges in Clackamas County, Oregon Bridges over the Willamette River Historic American Engineering Record in Oregon Bridges by Conde McCullough 1922 establishments in Oregon Steel bridges in the United States Box girder bridges in the United States