CHENNAI: The Chennai Metro Rail Limited (CMRL) on Saturday achieved a major milestone in Phase II tunnelling works, as Tunnel Boring Machine (TBM) Vaigai made a successful breakthrough at the Mandaveli Station shaft.

The tunnelling on the 775-metre stretch between Greenways and Mandaveli stations, part of Corridor-3, began in February 2024. The work is being executed by Larsen & Toubro Ltd. Two TBMs, Vaigai and Noyyal, were deployed for the section, and the breakthrough by Vaigai marks the completion of the up-line tunnel.

The event was witnessed by CMRL Director (Projects) T. Archunan, along with senior officials, including CGM (PP&D) Livingstone Eliazer, GM (Underground) Anto Jos Menachery, GM (Tracks) C Selvam, Consultant CRE Sanjeev Mandal and Project Director (L&T) Jayarama.

The t

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