About India's first Underwater Metro:
- It is a part of Kolkata Metro’s East-West Corridor.
- It passes under the Hooghly River in the city's northeast, with the tunnel 13 meter below the riverbed and 33 meter below ground level.
- Total length of the tunnel: 520 meter
- It forms part of the 4.8 kms underground section from Howrah Maidan to Esplanade
- Once this stretch is open then Howrah will be the deepest Metro station (33 meters below the surface) in the country.
- The metro is expected to cover the 520-meter stretch under Hooghly river in 45 seconds.
- The tunnel will have exists for emergencies like earthquakes.
