The swing bridge was converted to a vertical lift bridge. As I noted, this is likely the ONLY Vertical Lift Bridge in the world with a CENTER lift tower!
Very detailed history of the river, navigation on the river, the railroad and the bridge, plus many good maps and photos.
Page at the project engineer's site on the conversion of this swing bridge to a vertical-lift span.
I had been planning to wait until I could photograph the bridge before I posted it; it is quite out of the way and off the beaten track. However, I was just made aware of the conversion that was about to be made. I'm glad they are restoring it to function, rather than just sealing it shut, although I'm sure the Canadian National Railway does not agree.