In this morning's Boston Globe there was a list and map of structurally deficient bridges of which there are apparently 500-600 of them (the article had several different numbers). There was also a map, although no list, and this bridge was one of them. I did a quick check and I see there is a construction project that has cosmetic and some structural repair as well. One of the things they are doing is replacing the ugly chain-link suicide prevention fence with an architecturally nicer one.
The bridge was built almost 60 years ago - before that there was a ferry (there is still a street called Ferry Street) and there is the draw bridge near the harbor that is opened frequently to let boats pass through. The bridge is named after A. Piatt Andrew, a Gloucester resident who among other things started an ambulance service in England and France during WW I.