Each day, on my ride to work I can check on the progress of the new portland bridges.
The two on the willamette are the Tri-Met light rail and the Sellwood replacement bridge.
In just a few weeks, the old Sellwood bridge is going to pushed 30-60 feet north, onto a temporary set of pillars, so that the new one can be built pretty much where the old one is now. In that way, traffic will be disrupted for just a week or so.
This will be fun to see.