When you want to do heavy lifting on the river, you bring out the crane barge. It doesn't move under its own power, so you also bring out the tow boat (on the right). The crane spent the weekend behind the old (now empty) Englund Marine building shown here, then it moved off and docked at the Maritime Museum. It has two huge metal pilings suspended from it. I haven't asked around, so I don't know if it's planning to do some work, or if it's just finding available places to dock until it goes to work again.
The pilings you see here are from earlier buildings, now gone. The seagulls, cormorants, herons, and (in season) ducks love to roost here.
For other photos featuring red, take a look at Ruby Tuesday.