Chuquicamata, also called Chuqui, is the largest open-pit copper mine in the world. Located in Chile in the Antofagasta Region, 15 km north of Calama and 245 km north-east of the capital Antofagasta at an altitude of 2870 m above sea level. The Chuquicamata mine has almost exhausted its production capacity as an open pit mine, so much so that construction work on the underground mine began in 2012. The object of the project is the expansion of the underground Chuquicamata mine which aims to increase its production capacities and useful life. The CC-110 contract concerns the mining development, fortification and civil works in all sublevels of the N41/N42/N51 northern macro-blocks. Mining development for the subsidence level of the N02/N01 macro-blocks only. Construction and enabling of civil, mechanical, electrical and hydraulic infrastructures in the northern N41/N42 macro-blocks.