I had no idea at about all of the suspension toll bridges that had crossed the Red River way back when. I was chasing that when I ran across this piece about the current bridge at Sowells Bluff.
more photos of the bridge
There are 2 pony trusses on each end and 8 riveted Parker through truss sections between them (12 sections total). The bank was so grown up you couldn't get a decent side view and even from the river I would imagine too.