India's first underwater tunnel to be built in West Bengal, expected to start by december 2023.

The first underwater tunnel in India is being built as part of the East-West Metro Corridor’s project, and it will take about 45 seconds for trains to cover the 520-meter stretch. The tunnel that goes under the Hoogly river in West Bengal is being touted as the Indian version of Eurostar’s London-Paris corridor. An estimated cost of Rs 120 crores is being spent on the project.

The tunnel, which is about 2.5 kilometres long, is expected to be commissioned in 2023 following the completion of the section between Sealdah and Esplanade.

The tunnel runs through the Salt Lake Sector V IT hub metro station in the east to Howrah Maidan in the west under the river. The construction of the tunnel has already been completed, and it is expected to be operational in December 2023 following the completion of a 2.5-kilometer section between Sealdah and the Esplanade.

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