My guess would be that the King Bridge Co. built the newer span.
I agree Anthony. It has what appears to be Phoenix Columns and the details on the bridge are very Phoenix Bridge Co looking. I would assume this was fabricated by Phoenix Bridge Co and installed by King Bridge Co. Anyone know if this can be verified?
Very similar to the Tug Fork Bridge
and obviously of earlier origin as well. Date may apply to the span that is mismatched with it.