Tunnel boring machine (TBM) S-711 achieved its first breakthrough at Maa Anandmayee Marg station for package DC-07 under the Delhi metro project phase-IV on January 14, 2025. It was commissioned in June 2023 at the Airforce launch shaft and travelled 2.67 km till Maa Anandmayee Marg station.
Package DC-07 involves design and construction of underground up and down tunnels by shielding TBM from the end of cut and cover tunnel near Sangam Vihar metro station up to the existing Sarita Vihar depot, underground ramp and cut and cover tunnels near Sangam Vihar and Tughlakabad metro station and underground metro stations at Maa Anandmayee Marg, Tughlakabad Railway Colony and Tughlakabad including retrieval/launching shafts on Aerocity-Tughlakabad corridor. The package was awarded to Afcons Infrastructure Limited in January 2022.
Delhi metro project – phase IV involves development of 112.4 km long metro rail network comprising six corridors with an investment of Rs 468 billion. The three corridors to be developed on a priority basis are Maujpur-Mukundpur (12.31 km), Janakpuri West-RK Ashram (29.26 km) and Aerocity-Tughlakabad (23.62 km). Whereas, the other three corridors approved in 2024 by the central government are Inderlok-Indraprastha (12.37 km), Lajpat Nagar-Saket G Block (8.38 km) and Rithala-Narela-Kundli (26.46 km).