Three views of the Duluth harbor this morning, Friday, March 2, 2012. Top, a crane barge, owned by Duluth Timber, sank in her Railroad Street slip yesterday. The Coast Guard is investigating any potential spills or other hazards that might be involved. Just off the slip, the Coast Guard cutter Alder was sitting still in the still water (note: I said water, not ice). Below, the Duluth Aerial Lift Bridge was also pretty still (more water).