• Dismantling, overhauling and rebuilding the machine for drilling in ambient conditions. Exposure to water and gas
• Assembly and installation of the device
• 4.5 km long excavation with negative slope in environmental and water conditions
• Supply, installation of a tunnel conveyor system
• TBM overhaul at 2.700 meters due to water influx
• Overhaul of the TBM machine at an area of 3,900 due to the influx of water and Project