Chuquicamata, also known as Chuqui, is the world’s largest open pit copper mine. Located in Chile’s Antofagasta Region, it is 15 km north of Calama and 245 km northeast of the capital Antofagasta, at an elevation of 2,870 meters above sea level.

Currently, the Chuquicamata mine has almost exhausted its production capacity as an open pit mine. For this reason, work began in 2012 on the construction of an underground mine, with the aim of extending its operational life and increasing its production capacity.

The project involves the expansion of the Chuquicamata underground mine through two specific contracts:

• Contract CC-110: covers mining development, fortification, and civil works in all sub-levels of the northern macro-blocks N41/N42/N51. In addition, it includes mining development for the subsidence level of macro-blocks N02/N01, as well as the construction and installation of civil, mechanical, electrical, and hydraulic infrastructure in northern macro-blocks N41/N42.
• Contract CC-140: provides for the construction of the main injection tunnel No. 15, mining tunnel No. 14, two by-passes connected to the existing ventilation tunnels, and connection tunnels with future vertical mining and injection tunnels.