I've written several times about the bridge that has been called the Hirohito Bridge, the Keelung River Bridge, and probably various other names that I've never heard. I'm not obsessed with the structure or anything, but I crossed it so many times on my way to the Club 63 and elsewhere that it is very much a part of my Taipei memories.
The bridge that existed when I was there was built in 1923 for Japanese Emperor Hirohito's visit to the Taiwan Grand Shrine. The shrine was located on the spot today occupied by the Grand Hotel. You can see the bridge toward the bottom of this painting.
The photo below is how it looked when I was at USTDC in the 1970s.
I recently received a couple of images from a friend that show the previous bridge that spanned the river at that point. I don't know if this was the original bridge or if there was another one there prior to this one.