Hall's Mill in the background manufactured cotton thread at the time of this photo.
Photo collection of Chester Gehman
BH Photo #485405
Has to make you wonder if much of that bracing was added later in an attempt to stiffen the trusses.
But then again... you never know! lol
I'm going in a different direction as I'm not seeing an ellipse here, but essentially a large diamond (with all kinds of crazy bracings) within a vertical endpost through truss. I think the ends may well be entirely cast... perhaps the whole bridge. I've not seen anything like it and would not be surprised if it's at least 1860's.
Here is the basis of my guess:
My first guess is that it is a very early (first?) form of a lenticular through truss by Corrugated Metal Co. (predecessors to the Berlin Iron Bridge Co.). Putting its build date at of before 1877.
I have some other guesses but I'm quite certain my first is correct.
Very bizarre and unusual! I wouldn't be surprised if this one didn't date into the 1850's. It puts me in mind of a precursor to a K-Truss.
Rather unusual truss configuration. Any guess on truss type and builder?