 This was opened in November 1907, and the Extension was further enlarged by 27 acres, that part opening on 14 July 1914.At the date of opening the new lock entrance for the South Dock Extension was 1,000 feet long and 100 feet in width, the largest lock in the world.In the nineteenth century and the first decades of the twentieth, the dominant means of land transport was by rail, and the dominant traffic flow was coal for export or coastal shipping.