The work on India’s first metro rail line under the river is almost complete and the service is expected to start soon. The East-West Metro corridor will pass through under Hooghly river and it will become the first such river crossing in the country.
Operating under Indian Railways, Kolkata Metro has constructed the first-ever transport tunnel in the country which will pass underwater. The tunnel has been constructed using world’s finest technology, soon rail travel will be introduced for rail passengers on this route.
The inquiry of Railway Safety Commissioner on Salt Lake Sector-5 from the Salt Lake Stadium i.e. around 5 kilometres of this metro line was completed on Tuesday and it is expected to get approval soon. Once it is approved, services of the metro will be started for the common people on this section.
It is worth mentioning that the East-West corridor of Kolkata metro is 15 Km-long which spans from Salt Lake Stadium to Howrah. This metro line between Salt Lake Sector-5 to Salt Lake Stadium has Karunamayi, Central Park, City Center and Bengal Chemical metro stations. Kolkata metro is spending Rs 8,572 crore on this entire project.
A transport tunnel is being built inside the river. Two tunnels are being constructed on the up and down line, which is about 1.4 kilometres long. The width of the Hooghly river here is about 520 meters and this tunnel passes through the bottom of the river bottom.
As per Kolkata metro website, the tunnel will enable the metro to travel more than a 10 storied building below the water surface for almost half a kilometre across the Hooghly river. The reinforced concrete segmental tunnel linings have a thickness of more than a quarter of a metre and are caulked with a gasket of neoprene and hydrophilic rubber to seal the tunnel from ingress of water. This marvel of modern technology is India’s first rare venture.