Webpage used for location research: http://mplindianaroom.blogspot.com/2010/04/mpl-treasure-trov...
I had looked at the map when I added the bridge page Joseph, and I agree that this is a good possibility for the former location of the bridge.
Would like to find some verification to confirm it.
While I can't be sure, there is a Bridge Street that runs east-west out of Mooresville, which crosses the East Fork of White Lick at 39.616413N,86.360581W. This seems to be the most likely place for this bridge.
Nothing left to show that a bridge was once there. I do know that Bridge Street did have a Through Truss we used to take when I was in High School (late 70's).