Vinci has won a $400M (£250M) contract to design and build two mining tunnels in Chile.
The contract, won via its subsidiaries Vinci Construction Grands Projets and Soletanche Bachy, covers drilling and blasting two 9km tunnels. Each have an average cross section of 65m², together with two intermediate access tunnels totalling 6km. The first of the main tunnels is for transporting personnel; the other is for the ore.
The tunnels will enable a new mine level to be created in El Teniente, the world’s biggest underground copper mine. El Teniente is located at an altitude of between 1.5km and 1.9km, 80km to the south of Santiago in the Andes.
The client is Chilean national copper company Codelco. Works will start in October 2011 and will take 40 months to complete.