New Delhi, Sept. 20 -- In a significant milestone for the ambitious undersea tunnel project between BKC and Shillphata, the New Austrian Tunnelling Method (NATM) has successfully achieved a breakthrough for its 5 km tunnel stretch.

This critical section, which runs 4.881 km, notably includes a challenging 7 km segment beneath the Thane Creek. Tunneling commenced in May 2024, and on July 9, engineers celebrated the first breakthrough for a continuous 2.7 km section, connecting the ADIT to the Savali shaft.

With this achievement, excavation is now complete between the Savali shaft and the tunnel portal at Shillphata, paving the way for the tunnel's integration with the viaduct segment of the Mega Airport High-Speed Rail (MAHSR) project. T...