‘Atmanirbhar’ underwater metro in Kolkata aims to hit the rails in December
India’s first underwater metro in Kolkata, an example of ‘Atmanirbhar Bharat’, for which a challenging task was done by Indian engineers, is expected to be open for commuters by the end of 2023.
The authorities have constructed a tunnel under the river Hooghly with an internal diameter of 5.55 meters and external diameters of 6.1 meters. The construction of the tunnel is completed with the help of a tunnel-boring machine (TBM)
Tunnels under the bed of river Hooghly, running 32 metres below water level is considered to be an engineering marvel.
