After doing a bit of Googling, turns out that you are indeed correct.
I'll fix the categories
Not 100% sure but think this line was THI&E. The UTC went east from Indianapolis through Maxwell, Shirley, Carthage, Mt. Lawn etc. to New Castle and left New Castle heading south to Dunreth where it joined the THI&E line from Indianapolis to Richmond along US 40.
They were all merged into Indiana Railroad (IR, Indiana Rail Road- IRR is different) in the 1920's.
This was actually a through truss built by Pan American Bridge Company out of New Castle. It is mentioned in their Golden Anniversary Booklet they published in 1952. I believe that a picture of it does exist but I can't remember where I saw it.
The Honey Bee Line (IN&T) ran to the North of here.