The bridge was used by the GM&O. It was built during the Cache River diversion project.
The GM&O never crossed the Cache before this project. May have been a ICG bridge after the merger in the 1970's. The other Cache river IC bridge is at another location.
Just want to clarify things based on the previous comment. This is a GM&O era bridge across the Cache Channel. I have a photo dated May 21, 1965, taken by the GM&O, of this bridge.