One of the most unique double deck bridges in the world The Foxburg Bridge in Armstrong County

Double Decker bridges in Pa are nothing new in Pittsburgh you have the Fort Pitt and Fort Duquesne  have been around since the fifitys .
But one very unique double decker bridge was along the Allegheny River in Foxburg  Armstrong County.

http://bridgehunter.com/pa/armstrong/foxburg/

https://en.wikipedia.org/wiki/Foxburg_Bridge_%281921%29

http://www.historicbridges.org/bridges/browser/?bridgebrowser=truss/foxburg/

http://www.bridgemapper.com/bridge_detail.php?ID=2860

 

I encountered it in the summer of 1974 while on a Boot & Paddle canoe trip from Boyscout camp in Tionesta to Pittsburgh.  a total of 150 miles of paddling I have done it twice as a teen.

It was  foggy morning when we came across this bridge when I noticed a cars headlights going one way when all of a sudden a train was coming over the top the opposite direction 

So what was going on  not much it seems as a way to save money engineers had combined  2 functions into one bridge . Autos ran inside the cage part of the bridge and trains ran on top. a most unusual arrangement as usually trains and or trolleys in the case of the Smithfield Street Bridge  ran side by side.

Unfortunately the bridge which was built in 1921 was torn down several years ago