I always wondered how they got there????

I do a lot of inspections of waterfront bulkheade properties.  I see bulkheaders making repairs and building new bulkheads all the time.  The houses ar quite close together so most of the excavation has to be done from a  barge.  I always wondered how they got the barge to the house.  I was lucky enough to be doing a bulkhead inspection when one came around a bend getting pushed by....what looked like a tin can that had a large deisel engine.  Took some pics.