India, June 2 -- The Delhi Metro Rail Corporation (DMRC) has floated a tender to carry out the design and construction of underground tunnels, ramps and four underground Metro stations-at Dayabasti, Sarai Rohilla, Ajmal Khan Park and Jhandewalan Mandir-for the upcoming Phase-4 Green Line Extension from Inderlok to Indraprastha.

Each bidder will have to submit a security of Rs.240 million, with the project to be completed within 42 months of awarding of work, according to the tender dated May 20, a copy of which was accessed by HT.

It said bids are sought for the "design and construction of twin tunnel by shield tunnel boring machine (TBM), cut and cover tunnel box work, underground ramps and four underground stations..", with a deadline...