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
http://bridgehunter.com/wv/mcdowell/24A240/
and obviously of earlier origin as well. Date may apply to the span that is mismatched with it.