Photograph of the Calcutta Docks taken about 1889 by an unknown photographer showing the 80 ft entrance to the half-tide basin with construction work in progress. The Calcutta Port is the only major riverine port in India and constitutes the Calcutta Dock System. The entrance to the dock was to be through a tidal basin about 600 ft by 650 ft, and from the tidal basin to the river were two entrances, one 80 ft wide and the other 60 ft. This view is of the westernmost of the two entrances to the tide basin.Source:http://bl.uk