What Happened to the Port of Calcutta?

Mumba and cenewa were less in importance than colcatawas maybe in the turn of the twentieth century. Chenna port was also a sort of gaining some importance, even though it was not a cenna doesn't have a natural harbor,. So cenna had some difficulty making it becoming a successful port city. But mumba definitely took over a lot of the work that calcutta was getting. And with a capital shifting to dally, calcutta's importance sort of reduced.