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India’s First Under-River Metro Tunnel

Context:

Prime Minister recently inaugurated a metro train service between Howrah Maidan and Esplanade in Kolkata, marking the opening of India’s first under-river metro tunnel.

Relevance:

GS III: Infrastructure

Dimensions of the Article:

  1. About India’s First Under-River Metro Tunnel
  2. Key Facts about River Hooghly

India’s First Under-River Metro Tunnel: Connecting Kolkata’s East-West Corridor

  • Integral part of Kolkata Metro’s East-West Corridor.
  • Passes beneath the Hooghly River in the city’s northeast.
  • Tunnel is positioned 13 meters below the riverbed and 37 meters below ground level.
  • Constitutes a 4.8 km underground section from Howrah Maidan to Esplanade.
  • Project cost amounts to Rs 4,965 crore.

Additional Features:

  • Houses the country’s deepest metro station, Howrah Maidan, located 32 meters below ground level.
  • Expected to traverse the 520-meter stretch under the Hooghly River in just 45 seconds.

Key Facts about River Hooghly:

  • Also known as Bhagirathi-Hoogly and Kati-Ganga Rivers.
  • A Ganges distributary, stretching approximately 260 km.
  • Originates in Murshidabad, West Bengal, where the Ganga divides into the Padma in Bangladesh and the Hooghly.
  • Silted up above Kolkata, the river flows southwest to enter the Bay of Bengal through a wide estuary.
  • Majority of water sourced from the Farakka Feeder Canal, thanks to the Farakka Barrage.
  • Fed by rivers like Haldi, Ajay, Damodar, and Rupnarayan in the lower reaches.
  • Important cities along the Hoogli include Jiaganj, Azimganj, Murshidabad, and Baharampur.
  • Spanned by notable bridges like the cantilever bridge between Haora and Kolkata and the Bally Bridge between Bally and Baranagar.

-Source: The Hindu


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