La India Mine

Project Highlights:

  • Civil Design
  • Heap Leach Design
  • Water Balance
  • Geotechnical Investigation
  • Construction Quality Assurance

The La India Mine, located in Sonora Mexico and owned by Agnico Eagle Mines, is expected to pour an average of 90,000 ounces of gold per year over the reserve life.

Tierra Group provided engineering design services for Phase 2 and Phase 3 of the heap leach facility with the associated ponds and water management structures. The Phase 2 expansion optimized the heap leach pad and provided approximately 37.6 million tons (Mt) of additional capacity. Tierra Group provided Construction Quality Assurance (CQA) during initial construction and expansion and conducted an evaluation of current soil cover to aid in prevention of rock acid generation. During the Phase 3 expansion, Tierra Group conducted a geotechnical investigation consisting of borehole drilling, test pits, and geophysical survey, which included the development of geotechnical parameters to conduct settlement and slope stability analyses.

In addition, Tierra Group provided Construction Quality Assurance (CQA) services including construction observation, sampling and field testing, installation of geosynthetic clay liner (GCL), and geomembrane. A geo-electrical study was also implemented to detect leaks in the geomembrane after the placement of the gravel drain (overliner).

Project Highlights:

  • Civil Design
  • Heap Leach Design
  • Water Balance
  • Geotechnical Investigation
  • Construction Quality Assurance

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