That beautiful photo is on the Kate Shelley bridge west of Boone, IA, a bridge still in place but bypassed in recent years in favor of a new bridge nearby. Reportedly, a major reason for the replacement was the corrosion caused by decades of passing ice reefers dripping brine down through the ties onto the bridge girders!
The new replacement bridge is made up largely from deck girders salvaged from the much, much newer abandoned Milwaukee Road bridge not far away. That bridge in turn was built by the Corps of Engineers for the Milwaukee when they dammed the Des Moines River after the War and forced track realignment.
Denny S. Anspach, MD
Sacramento, CA 95864