Statement of Qualifications

Civil engineering is designing, constructing, and maintaining physical structures, and comprises at least a partial component of nearly everything Tierra Group International, Ltd. does. Whether applying our core, geotechnical, water resources, or geologic hazards expertise, inevitably our work leads to modifications made to the natural environment or the construction of man-made structures. Tierra Group applies its civil engineering expertise to the conception, design, construction, and operations of physical structures such as:

  • Tailings Dams
  • Water Dams
  • Heap Leach Pads
  • Waste Rock Dumps
  • Retaining Walls
  • Hydraulic Structures - Canals, Channels, Head Structures, Culverts, Pipelines, and Ponds
  •  Infrastructure - Foundations, Roads, Bridge Abutments

Tierra Group has applied our professional civil engineering expertise designing and constructing dozens of these structures on six continents. This geographic variety has allowed Tierra Group’s Team to develop expertise designing facilities under a variety of challenging geotechnical conditions and climates, such as:

  • Laterites
  • Saprolites
  • Swelling or Collapsible Soils
  • Karst
  • High and Active Seismicity (Earthquakes)
  • High Altitudes (4,000 masl)
  • Tropics

Tierra Group has innovatively adapted to these challenging environments using highly-trained professionals and state-of-the-art techniques and software to execute the following:

  • Conceptual Plans
  • Feasibility Designs
  • Final Engineering Designs
  • “For Construction” Drawings
  • Construction Specifications
  • Resident Engineering
  • Quality Assurance

Regardless of the engineering challenges posed, Tierra Group’s broad experience, intimate attention to site-specific conditions, and keen focus on developing innovative solutions has earned us a respected reputation and loyal clients around the world.


Select Civil Projects

Mission Mine

Tierra Group is implementing a corporate Tailings Stewardship Strategy (TSS) at all of ASARCO Grupo Mexico’s mines in Arizona, USA (Hayden, Mission and Ray mines). Tierra Group conducted a site visit to each site to perform dam safety inspections, interview…

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Sterling Mine

Sterling Mine Sterling is an underground gold mine in southern Nevada. Gold recovery is through heap leaching and a carbon adsorption-desorption-recovery (ADR) plant. Tierra Group team members have a long history at Sterling starting with heap leach pad final permanent…

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Tennessee Mines

Tierra Group performed Dam Safety Reviews (DSRs) for Nyrstar’s tailings storage facilities (TSFs) located in Tennessee, United States.  Tierra Group served as the Tailings Reviewer to ensure conformity with local regulations, the Nyrstar Tailings Storage Facility (TSF) Standard, and to…

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Amulsar Gold Project

Tierra Group completed a technical review of the heap leach pad for the Amulsar Mine property owned by Lydian Armenia located near the town of Jermuk to the southeast of Armenia. The heap leach pad consists of four phases with…

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Santa Pancha Mine

Tierra Group provided a desktop and field review of B2Gold’s Santa Pancha Mine hydrogeology . The review identified data gaps in site data and provided recommendations for ameliorating the existing site hydrogeology model and improve underground water management system efficiency.

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El Diamante Hydropower Dam

Tierra Group conducted a Preliminary Site Assessment of a potential large-scale landslide near the El Diamante Hydropower Complex in Matagalpa, Nicaragua.

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Masbate Mine

Tierra Group performed a due diligence study of Masbate’s 12-Mt tailings storage facility. Services provided included a forensic study to determine the cause of seepage through an abutment and performed an independent safety audit of tailings management practices. A risk…

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Black Butte Copper Project

Black Butte Copper Project Tierra Group performed a third-party design review of a Cemented Tailings Facility (CTF) and multiple process and freshwater ponds. Tailings will be mixed with cement at the planned paste plant and deposited in the CTF along…

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Confidential Client - Brazil

Tierra Group was retained to perform metallurgical due diligence on two operating properties and two prospects in early stage development. The two existing operations consisted of a convention heap leach followed by ADR to produce a Dore on-site and a…

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Guanacevi

Tierra Group provided Tailings Stewardship Services, including a dam inspection, slope stability review and operational improvements. The Guanacevi tailings storage facility, located in Durango, Mexico, consists of dry-stack (Press filtered) tailings placed atop a conventional (slurry) tailings storage facility.

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Hayden Operations

Tierra Group is implementing a corporate Tailings Stewardship Strategy (TSS) at all of ASARCO Grupo Mexico’s mines in Arizona, USA (Hayden, Mission and Ray mines). Tierra Group conducted a site visit to each site to perform dam safety inspections, interview…

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Antapaccay

Glencore’s Antapaccay mine is located in the Espinar province, Cuzco, Perú. Tierra Group logged geotechnical, geological and geo-mechanical properties of drill core advanced in Antapaccay's Northern Pit. Approximately 6,000 meters of core were logged. Specific samples were selected for geotechnical…

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