India’s First Underwater Metro Tunnel in Kolkata

Santhosh Kumar 08/03/2024
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India’s First Underwater Metro Tunnel in Kolkata mind map Recent News: Inauguration: By: Prime Minister Narendra Modi Date: Not specified in provided information When: Expected completion: 2023 Why: Decongest traffic Transform lives near Hooghly river What Length of corridor: 16.6 km Underwater stretch: 520 meters Depth below riverbed: 33 meters Depth below surface: 13 meters Construction cost: Rs 8,600 crore Features: 1.4m-wide concrete rings Hydrophilic gaskets to prevent water ingress Stations: - Esplanade - Mahakaran - Howrah - Howrah Maidan Travel time reduction: Sector V to Howrah Howrah to Sealdah: 40 minutes (from 1.5 hours) Where: Under Hooghly river Connecting: Howrah and Kolkata IT hub of Salt Lake Sector V to Howrah Maidan Who: Kolkata Metro Rail Corporation (KMRC) Site Supervisor: Mithun Ghosh How: Twin tunnel over 500 meters Tunnel boring: Timeline: First tunnel: May end or first week of June 2017 Second tunnel: July end 2017 Restrictions: Only one tunnel boring machine operational at a time Significance: First of its kind in India Expected to be at par with Eurostar (London to Paris) Helps reduce travel time Aids in traffic decongestion Challenges: Technical challenges: Underwater construction complexities Evacuation passages for emergencies Way Forward: Not specified in provided information

The Kolkata Metro Rail Corporation is set to complete India’s first underwater metro tunnel, connecting the East and West metro corridors under the Hooghly river between Howrah and Kolkata. This 520-meter stretch, part of a 16.6 km east-west corridor, is designed to significantly reduce travel time and decongest traffic in the area. The project, costing Rs 8,600 crore, includes safety features like walkways for emergency evacuation and is built 33 meters below the riverbed. The underwater tunnel will connect the IT hub of Salt Lake Sector V to Howrah Maidan, crossing the river. With stations at Esplanade, Mahakaran, Howrah, and Howrah Maidan, the metro aims to transform transportation in Kolkata, making it akin to international standards similar to the Eurostar connection between London and Paris​​​​​​.

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