The Left Coast Lifter, one of the world’s largest floating cranes, floats next to the Spuyten Duyvil Bridge. Amtrak is repairing the rotating middle section of the bridge, which requires the crane to lift it onto a barge. And it’s heavy — the middle portion weights a whopping 1.6 million pounds. It’s part of an effort by Amtrak to repair the bridge, which still suffers from damage by Hurricane Sandy in 2012. Repair work is expected to last until August.