The construction of the base walls around a shaft in central Kolkata’s Bowbazar is underway, said officials of East-West Metro.
The construction of a concrete base slab, the key to bridging a gap at the Metro site in Bowbazar but stalled since the subsidence on May 11 last year, began in the third week of February this year and was completed on March 3.
The construction of the sidewalls and the roof are the remaining steps before the gap is shut. The closure of the shaft — made to retrieve the twin tunnel boring machines — is a must to bring trains from Sealdah, through the Sector V-bound tunnel, for trial runs between Esplanade and Howrah Maidan.
