• Complete modernization of the TBM machine after the completion of 15 km of the first phase of drilling
• Modification and updating of the TBM machine due to the severe geological conditions of the area (water pressure and H2S gas)
• Assembling and launching the TBM machine
• Supervisor drilling operations up to 500 meters in length of the tunnel
• Supply, installation of a tunnel conveyor system
• Overhaul and restart on 19th kilometer due to flooding