These two boats and this crane are at the far end of the Gowanus Canal, between the Union Street Bridge and the pumping station. A reader emailed last week to note that they were and wondered what they might be doing. Dredging? Construction? While dredging might eventually happen–and this end of the canal is at the top of the list because of all the sludge left behind here by raw sewage pouring into the canal–it won’t occur for years. As far as we can tell, it looks like they are repairing the bulkhead at the end of what would be Sackett Street, near the movie and TV special effects company that is headquarted on the canal.