Engineering Marvel: Know about India's first underwater metro rail
india Mar 05 2024
Author: Aishwarya Nair Image Credits:X
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Inauguration
PM Modi will inaugurate India's first underwater metro rail tunnel during his visit to West Bengal's Kolkata on March 6, 2024.
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Kolkata Metro extension project
This project aims to connect Salt Lake to Howrah via Kolkata with a stretch below the Hooghly River. The underwater metro is part of the East-West Metro corridor.
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Length
The bottom part of the newly-built tunnel is 26 metres from the river’s surface. The trains will ply 16 metres below the riverbed.
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Who built the tunnel?
Construction major Afcons and Russian company Transtonnelstroy jointly built the tunnel. Afcons dug the Hooghly tunnels in April 2017 and completed them in July 2017.
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Automatic Train Operation (ATO) system
Employing an innovative Automatic Train Operation (ATO) system, the metro ensures efficient and seamless transit, with plans to commence commercial operations.
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Station excavated to depth of 30.5 meters
To align with the 40-mtr deep under-river tunnels, the station had to be excavated to a depth of 30.5 meters.