About India’s First Under-River Metro Tunnel

Subject: Geography

Section: Mapping

It is a part of Kolkata Metro’s East-West Corridor.
It passes under the Hooghly River and forms part of section from Howrah Maidan to Esplanade.
The stretch also has the deepest metro station in the country, the Howrah Maidan station, at 32 metres below ground level.

River Hooghly:

The Hooghly River, also known as the Bhagirathi-Hoogly and Kati-Ganga Rivers.
It is a distributary or arm of the Ganges River.
It is formed in Murshidabad, where the Ganga splits into two parts, while the part flowing through Bangladesh is called the Padma.
The Hooghly River is silted up above Kolkata, and the river flows to the west and south to the estuary of Rupnarayan and then south and southwest to enter the Bay of Bengal through a 32-kilometer-wide estuary.
Haldi, Ajay, Damodar and Rupnarayan are the rivers that feed the lower reaches of the Hooghly.
The important cities near the Hoogli River are Jiaganj, Azimganj, Murshidabad, and Baharampur