A lot of that stuff is the collection of Mike Skarry, who operates a floating crane when he is sober enough to walk. But Mike never let sobriety set his schedule. He works when he needs cigarette money.
There is also a floating monster on the Sac, below Decker Island. Tied to that thing is another of Mike's cranes. They left the stuff there years ago, because they felt that the Sacramento River was a safer place to leave it than B.I.
This is a man who truely has no concern for any one or any thing else.