4 x 6 x 11" 10 x 15 x 27.5cm. Kit One of the new structures, still in use today, was the flood loader. Served by a network of conveyors, these large buildings are essentially storage bins, which load entire trains on the move. After coal has been washed, crushed to size and graded, it's delivered from these facilities to the flood loader, which can be quite some distance away.