This bridge is now removed. It was still listed in the CFR as a movable bridge, but stated that it didn't have to be opened for water traffic (especially as the downstream 2nd (Market) Street Bridge was replaced with a fixed bridge, rendering this part of the river non-navigable), plus there's a water main that was run over the eastern sidewalk that wouldn't let them open it in any case. (I've never seen it with the counterweight in place.)
What's there now is only a narrow wooden pedestrian crossing that's basically balanced on top of that water main, and a lot of cranes and excavators etc. I don't know what they're putting in its place.
Flood waters have reached this bridge.
http://www.youtube.com/watch?feature=player_embedded&v=1Uv5Q...!
Sorry, it's the western sidewalk that has the water main. Current street view *on* the bridge still shows the bridge with cars on it, but when you get to the approaches you see the barricades (albeit with the bridge still there beyond them).