This bridge is a simple two span deck girder, which is parallel to the middle bridge. It was built to carry the East Side Line of the Northern Pacific.
Built in 1889, the bridge originally consisted of two tracks of single span deck plate girder. In 1926, a center pier was added to the bridge to reinforce the aging girders.
It is unknown when the second track was removed, but the girders have remained largely unaltered since the construction of the center pier.
The bridge has been ranked by the author as being locally significant, due to the common design of the bridge.
The photo above is an overview.