Contonga Mine

Contonga, a 990 tpd underground Zinc mine located in Perú’s Ancash Region, has been in operation for more than 25 years. Tierra Group team members assisted Nyrstar’s acquisition due diligence team by performing a fatal flaw analysis of Contonga’s Tucush Tailings Storage Facility (TSF) in 2009. Following the acquisition, Tierra Group’s team developed a modification plan to the 40-m high cyclone tailings dam to meet regulatory requirements and to allow the mine to continue operating. Two subsequent dam raise designs have been developed, which will allow Contoga Mine to continue operating through 2015, at which time a new TSF will be required.

In anticipation of Tucush’s closure, Tierra Group initiated a siting study to identify a new TSF location, and conceptual closure and reclamation planning has begun. Tierra Group also designed an expansion for the Tucush TSF, provided operations support, and designed a new crusher foundation.

Project Highlights

  • Due Diligence
  • Water Balance
  • Climatology
  • As-Built Drawing & Report
  • PMF Hydrology & Hydraulic Designs
  • Conventional TSF Remediation Design
  • Dam Monitoring
  • Foundation Designs
  • Detailed Design for Construction
  • Operations Plans
  • CQA

Project Photos

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Customer Testimonial

“Tierra Group’s Team has provided Nyrstar with geotechnical and environmental engineering services to a large majority of our mining operations. Primarily focused on practical Tailings Impoundment Solutions, Tierra Group have also provided top quality engineering services for Mining related technical reports such as Mineral Resource and Ore Reserve Statements. Tierra Group has been a dedicated engineering partner to Nyrstar.”

Rod Lamond, General Manager