Just for clarification I had come from Five Islands Harbor, Georgetown, up the Sasanoa River which joins the Kennebec River just beyond the two bridges, in my 20' I/O boat.
After docking at Bath Waterfront Park and having some lunch in downtown Bath I was on my way back to my Five Islands mooring(see photo). The two bridges in the prior photo are the Carlton Bridge, now only used by the railroad; and Sagadahoc Bridge which replaced Carlton. Sagadahoc, when it was finished, was America's longest bridge of its type. Huge(meaning long) concrete modules were cast not far in back of where I took the photo in my lead post. Then each module was barged to the scene and put into place by "wickid big" cranes on barges. Bath Iron Works, Shipbuilder, lies just on the other side of the bridges.
It was unusual to see the Carlton in a raised position. It's likely that Bath Iron Works had been maneuvering a ship which wouldn't be going under the bridges unless the wind or some other factor were to lead it Northerly. The Sagadahoc was built to accommodate the destroyers passing beneath, if necessary.
HR