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India's first underwater tunnel
January 6 , 2023
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- As part of Kolkata’s East-West Metro Corridor, India’s first underwater tunnel is being built under the Hooghly River in West Bengal.
- The metro trains that will use the structure will take just 45 seconds to cross the 520-metre underwater tunnel.
- The Kolkata metro tunnel in Kolkata is 13 metres below the riverbed and 33 metres below the ground.
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