The tunnelling work for construction of the Colaba-Bandra-SEEPZ Metro-3 underground corridor will soon begin from Cuffe Parade in south Mumbai.
The tunnel will pass through Colaba, Azad Maidan, Churchgate and Grant Road upto the Science Museum in Worli.
Work has already started between Mahim and Dadar.
The work is being launched from shafts at three locations — Colaba Woods in Cuffe Parade, another one at Azad Maidan in Chhatrapati Shivaji Maharaj Terminus (CSMT), and one at Mumbai Central.
A total of 17 tunnel boring machines (TBM) will be used for the entire underground corridor's construction. Of these, four have arrived and the remaining are expected to reach by February 2018.