- Department of Transportation. Federal Highway Administration. Office of Planning, Environment, and Realty. Office of Natural and Human Environment. National Scenic Byways Program. 1991-9999
- National Archives at College Park - Still Pictures
The original finding aid described this photograph as: Original Caption: Oregon's state engineer, Conde B. McCullough, oversaw the building of many of Oregon's historic bridges. Location: Oregon (44.428° N 124.068° W) Status: Public domain. Photo by Dennis Adams.