Your First Clue your quarry is lost is a curve in the road...
Professor Kevin Patrick, of Indiana University of Pennsylvania says that when a straight road curves slightly, crosses a bridge, then gently curves back to the original alignment, the bridge is a replacement that was built next to its predecessor. Sadly, that's true here and I was too late to get the deck truss that was here.
Photo taken by J.R. Manning in July 2009
BH Photo #142420