First, an overview of the progress. You can see that the lift towers on the Portsmouth side are nearly complete, having surpassed the Kittery towers. Also noteworthy is the lack of towers on the old bridge. While I was traveling for a couple weeks, they were completely demolished. Sorry to have missed that!
These photos were taken from about 190' above the water. There is one more full tower segment, and then the cap remaining. I was standing on the landing of a staircase that will eventually continue to the top.
The final photo below is a view down into the tower. The tower is currently full of staging, but will be an open shaft to accommodate a counterweight. The openings with steel exes in them will be windows. The steel is in place to stabilize the segements while they were transported and stacked.
If you look closely, you'll see two hydraulic jacks under the segment on the right (and two more for the eventual segment on the left). These help to balance the assembly until it's completed.