• The tunneling work gets completed by Tunnel Boring Machine [TBM] in East West Metro Corridor with the breakthrough of “Urvi“ at Bowbazar, Kolkata on 15.05.2021.
• With this breakthrough the entire TBM tunneling for the Kolkata East-West Metro Project is completed.
• The Tunnel Boring Machine ‘Urvi’ which had earlier completed East Bound tunnel from Esplanade to Sealdah on 09.10.2020 was relaunched from Sealdah after necessary refurbishment and inspection on 09.01.2021 to complete the balance 800 m tunneling work in West Bound tunnel from Sealdah to Bowbazar.
Mains Paper 3: Science and Tech
Prelims level: Tunnel Boring Machine
Mains level: Significant feature of the Tunnel Boring Machine