Creative Commons Attribution-Share Alike 3.0 Unported
Photo taken by Joe Mabel
View this photo at Wikimedia Commons
BH Photo #190180
I believe this is a three hinged arch bridge. It is very rare, but some arch bridges lack a true arch shape, and some can come to a point at the crown hinge. Here is another extreme example: https://historicbridges.org/bridges/browser/?bridgebrowser=m...
Some type of hinged arch perhaps.
We are curious about the middle of the bridge, where it looks to be a pinned connection between two halves.
We are unfamiliar with this detail.