Google has a photo of the 1880s bridge, but it is a Flickr photo copyrighted by Union Depot - Historic Railroad. The Flickr comments do include a history of the railroad. The photostream contains another photo of this bridge. Thomas Keesling put a copyright on some more old photographs of this bridge: 3/4, closeup, and elevation.
A comment on the "closeup" photo:
|Richard Koenig posted|
A northbound Illinois Central Gulf train crosses over the Wabash River Bridge at Riverton, Indiana. The lead unit is Illinois Central number 9500, an EMD GP38AC. Image by Richard Koenig; taken in the fall of 1979.