Stumbled on this page and saw the question about the bridge. I don't think this bridge was anything special, I looked at it many years ago before it was replaced. It looked like it was made from salvaged materials and the "trusses" if you can call them that were of welded construction and didn't look like bridge trusses.
This spot now shows a culvert there on satellite, and this wouldn't be the only instance of a crossing being replaced in this county where the replacement doesn't get listed (due to being too small), so my guess is it's gone.
That said - a deck truss being newly built in 1968?
So, it essentially would have been a "Frankenbridge" in that regard.