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

Newcrest Red Chris Tailings Stewardship

Tierra Group provided Tailings Stewardship Services for TSFs and water dams at the Cadia, Terfer, and Red Chris properties. Responsibilities included data/report review; identifying and assisting the client with managing risks, liabilities, controls, and reporting; evaluating progress towards GISTM compliance;…

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Ray 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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La Trinidad

Tierra Group began work at La Trinidad providing heap leach pad construction recommendations and a water balance. Tierra Group continued support with a heap leach pad expansion design, slope stability analyses, hydrologic analyses, diversion design, liner design, and leach solution…

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Oracle Ridge Copper

Tierra Group represented Oracle Ridge Mining as the Qualified Person for portions of the feasibility-level design including the Dry Stack Tailings Storage Facility (TSF) Design, Site-Wide Stormwater Management, Water Supply Pipelines, Haul Road and Access Road Design Improvements, and the…

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Lagunas Norte Mine

The Lagunas Norte Mine, operated by Barrick Misquichilca S.A., is an open pit gold mine located in the Quiruvilca district, Santiago de Chuco province, La Libertad department, Perú. The main study objective was to evaluate the volume of effluent discharge…

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Bald Mountain Mine

Tierra Group assisted the Bald Mountain Mine Project Development Team with an evaluation of potential uses for spent ore on legacy heap leach facilities. Tierra Group completed a collaborative trade-off study with site personnel evaluating spent ore use as overliner…

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Morelos Mine

Tierra Group designed and implemented a stability and safety monitoring plan for Torex Gold’s Morelos Mine dry stack tailings storage facility (TSF). The monitoring plan includes installing inclinometers and vibrating wire piezometers, and training operations staff to download instrumentation readings.…

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San Francisco Mine

Tierra Group conducted geo-electrical testing to locate leaks present in the geomembrane liners underlying a Solution Conveyance Canal, Sumps 1 and 2, and the Intermediate Pond at Timmins Gold Corp’s San Francisco Mine in Sonora, Mexico. Leak detection testing procedures…

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Cerro Negro

Tierra Group was selected to assist Goldcorp with global Tailings Stewardship Strategy (TSS) implementation at all of Goldcorp’s active tailings sites in Latin America (Mexico, Argentina, and Guatemala). Tierra Group worked in conjunction with Goldcorp and another global engineering consulting…

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La Negra Mine

Tierra Group performed a tailings storage facility safety (TSF) audit for the 90 m high upstream constructed tailings dam at La Negra Mine in Querétaro, Mexico. The project included a TSF dam inspection and Dam Safety Inspection Report (DSIR) containing operational…

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Midas Gold Project

Midas Gold’s project is located in the remote central Idaho Rockies near the town of Yellow Pine.  It is a brownfields gold-antimony project featuring three open pits and an anticipated 22,000 tpd plant throughput, along with challenging terrain and environmental…

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El Aguila

Tierra Group performed a 3rd party engineering design peer review of a tailings storage facility expansion design. The review resulted in the owner realizing $650,000 in cost savings without compromising the facility's design integrity over the original design. Tierra Group also…

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