The East-West Metro corridor, the second line of Kolkata’s Metro network, will connect Kolkata and Howrah, and one of its attractions would be India’s first underwater transport tunnel over the Hooghly river.
Concerning the East-West Corridor
- The East-West Corridor is projected to greatly reduce city congestion.
- The line connects Salt Lake Sector V, Kolkata’s IT powerhouse, to the western suburb of Howrah.
- The eastern section of the East-West line is operational, while the western section is buried.
- The complete line has 12 stations, including the country’s deepest, Howrah, at a depth of 33 metres.
The Underwater Tunnel is a key element
- The Hooghly River tunnels are 520 metres long and more than 30 metres below the river’s surface at their deepest point.
- The trains will go at 80 km/h and will cross the half-kilometer segment beneath the Hooghly in around 45 seconds.
- The interior diameter of the underwater tunnels is 5.55 metres, and the external diameter is 6.1 metres.
Source: https://indianexpress.com/article/explained/metro-under-the-river-hooghly-river-kmrc-howrah-maidan-8569520/#:~:text=Trial%20runs%20are%20underway%20on,the%20city's%20most%20congested%20stretches