San Xavier Mine West Portal Expansion

The San Xavier Mine in Sahuarita, Arizona, requires a new portal expansion to the underground 150-ft level (vertical) at a maximum decline grade of 15%. The project sponsor requests a multistep process to decide the portal expansion's location and structure. A 70,000 square meter area will be surveyed using magnetics and resistivity data to determine the optimal location and structure of the new portal and decline. Following the interpretation of the collected geophysical data, the sponsor requests the team determine the design for the potential portal expansion on the Western side of the San Xavier Mine.