Poteau River Bridge near Loving
This is actually a Petite Pennsylvania Truss
Photo taken by Gene McCluney in May 2007
BH Photo #128887
This bridge is far older than 1937. Most pinned Pennsylvania trusses like this generally land somewhere in the 1895-1905 zone. I have seen one like this as late as 1914, but it was a little more massive. Otherwise, to find a pin-connected Pennsylvania newer than that you probably are seeing a very large long-spanning bridge. 1938 Tunnelton Bridge in Pennsylvania for example, although it has pin/rivet combination/hybrid connections. http://www.historicbridges.org/pennsylvania/tunnelton/index....
I suspect that this bridge may be older than 1937. I would be surprised that a bridge this late would use pinned connections.
This bridge looks like it might possibly be a Kansas City Bridge Co. structure.
As of 4/17/2013 the new bridge is built and in place some 150+ yards east of this bridge. This bridge is still standing and somebody (likely a local farmer) has torched the barricades off and it is being used to move farm equipment between pastures.
i don't know if it helps you to approximately date it or make-it, but the name "Jones and Laughlin" appears on the heavier bracing, and the stylized "illinois" stamp on the lighter-duty bracing. Thought it possible Some of you guys with a lot of bridge hunting/researching experience might be able to discern something from that.
Couldn't get any decent pictures, was a cold, rainy,dark day when I was out there.