India’s first underwater metro tunnel in Kolkata to get ready by 2023

Zee News India’s first underwater tunnel corridor is built 33 meters below the riverbed of Hooghly river and will provide metro connectivity from Kolkata to Howrah by 2023, said offiials.    https://ift.tt/5xJTOYC April 07, 2022 at 10:43AM India’s first underwater tunnel corridor is built 33 meters below the riverbed of Hooghly river and will provide metro connectivity from Kolkata to Howrah by 2023, said offiials.   

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