It's almost definitely a relocated truss being used as a farm bridge.
Luke, what do you suppose of this structure? Looks like a road came from the south. Maybe a farm bridge? Looks pony-like
Historicaerials shows that bridge there in 1981, and the 1994 view shows what looks to be a pony truss on Goettemoeller.
Neat little pony truss Mike... I believe there are still lots of them out there undocumented.