India’s First Underwater Train 

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• India’s first underwater train in Kolkata is all set to be fully completed by 2023. 

• This is a one-of-a-kind underwater metro train that is built in India and is being compared to Eurostar which joins London and Paris.

• The Kolkata Metro Rail Corporation (KMRC) has made a way to pass under the Hooghly River. 

• The East and West corridor will be connected via this twin tunnel over 500 meters. 

• The train will be 13 meters below the Hooghly River.

• As per reports, the train will run at a depth equal to a 10-story structure while underwater. 

• The tunnel will be built with 1.4 m-wide concrete rings, which will be part of the metro station. 

• The tunnel will have hydrophilic gaskets to prevent water from entering the tunnels.  

• According to the reports, the project has been completed at the cost of roughly INR 8600 crore.

• The project is likely to become operational by March 2023.