Overview (Looking north from southern end of bridge)
Photo taken by James McCray in July 2015
BH Photo #345610
I think I can offer a fairly confident idea for this bridge. Bridges built with a narrow one-lane width such as that seen on this bridge would be very rare after 1920. Its pretty clear it was built to be widened at a later date into a two lane bridge. As to why it was built as a one-lane bridge, I also have a strong theory. Note the construction date (during World War II) and also note this is a steel stringer bridge (recall there was a steel shortage during the war). Bridges built during this period often have unusual histories. I therefore believe that the bridge was built using limited steel supplies as a one-lane bridge and planned (after the steel shortage ended) to have additional steel beams added to create a standard two-length bridge.
Like the great Pyramids of Egypt, or Stonehenge, or various Aztec and Mayan Ruins of Mexico and South America this will remain a mystery for great minds to discuss and debate until Christ comes back. I will just default and say that it was the aliens who built the bridge for a purpose only they know. Perhaps there is an X-Files episode that covers it or it has been discussed at length on the Coast to Coast Radio Show.
Who built this bridge? And why are the piers so much wider than the deck? Was it meant to be dual purpose?