Detailed Design Consultancy (DDC) and Site Services / Supervision - (i) for the construction of two new Tunnels - one parallel to the existing 544 m long Old Goa Tunnel, and the other parallel to the existing 1561 m long Pernem Tunnel and also (ii) for the rehabilitation of the existing Old Goa and Pernem Tunnels on the Konkan Railway route, in the State of Goa, India.