A unique situation here.
The old rail corridor is now part of a trail system, but instead of crossing the creek on the old bridge it jogs over to a MOB span built next to it. That bridge appears to have been built for another trail that now connects here, and it allows the rail span to be preserved with the tracks still in place.
Not at all a fan of MOB's...but I actually kinda like this!
I didn't think that Indiana had run out of historic bridges to relocate and reuse. Their bridge marketing website lists several AVAILABLE bridges that would have fit this crossing. Perhaps the website is in error, since I can think of no reason to not use one of the available historic bridges listed on that website for this crossing.
http://www.in.gov/indot/2532.htm
...Also is there a written agreement that the railroad bridge will be preserved? What prevents a local contractor from misleading local authorities into the concept that the abandoned railroad bridge is a waste of space and that they would be willing to scrap it out for them?