India’s first Underwater Rail Tunnel

Geography Transport

The two organizations Afcons Transtonnelstroy and Kolkata Metro Railway Corporation Ltd (KMCRL) involved in implementing the East West Metro have completed boring the India’s first underwater tunnel under the Hooghly river to link Howrah and Kolkata.
The project connects Howrah to the west and Salt lake to the east.
A massive tunnel boring machine called Rachna was used for boring the underwater tunnel. The tunnel boring job was completed within in a time of one month and six days well ahead of schedule.