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

NioCorp’s Elk Creek | Tailings Storage Facility (TSF) Feasibility Study

Tierra Group advanced the TSF design to a Feasibility Level according to the Canadian National Instrument NI 43-101 and the U.S. Security and Exchange Commission’s Subpart SK-1300 regulation. Tierra Group’s scope of work included a geotechnical investigation, engineering analysis, and TSF…

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Caeté Complex

Tierra Group developed a site-wide water management plan, and performed a liquefaction potential study following the Samarco tailings dam failure in Minas Gerais, Brazil. A tailings storage facility water balance was developed to optimize water usage and minimize risks at…

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Lost Creek Project | USA

Tierra Group is assisting Millcreek Mining and Black Mountain Sand with the preparation of permitting documents for the Lost Creek Project; including a preliminary Stormwater Management Plan, preliminary Groundwater Monitoring Plan, and general permitting exhibits. Tierra Group conducted a site geotechnical…

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Campo Morado Mine

Tierra Group performed a Dam Safety Review (DSR) for Nyrstar’s tailings storage facility (TSF) located in Campo Morado (Guerrero, Mexico).  Tierra Group served as the Tailings Reviewer to ensure conformity with local regulations, the Nyrstar Tailings Storage Facility (TSF) Standard,…

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Bunker Hill | Tailings Storage Facility (TSF) Design

Tierra Group designed the Bunker Hill dry stack TSF. The TSF design was challenging given the limited land area, steep terrain, seasonal cold weather, and surface water management. Tierra Group’s scope of work included siting the facilities, geotechnical investigations, civil…

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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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Fire Creek Mine

The Fire Creek Mine, located in north-central Nevada, is owned and operated by Klondex Gold & Silver Mining Company.  The mine is an underground mine that is operating a bulk sampling program and has recently submitted its Preliminary Feasibility Study. As…

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Anaconda Mine

Tailings Storage Trade-Off Study Tierra Group completed trade-off studies evaluating potential TSF sites to store 25 million tonnes of tailings. Trade-off studies included dam layouts, cost estimating, and recommendations for future work. Trade-off study challenges were minimizing costs while still…

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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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Pierina Mine

Barrick Gold Corporation’s Pierina Mine in Ancash Department, Perú began operations in 1998. A progressive reclamation and closure plan began in 2013.  In 2015-16 Tierra Group developed detailed engineering designs for channels, sediment traps, two 45,000 m3 sediment ponds, water…

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Camino Rojo Heap Leach Design

Tierra Group provided a heap leach facility detailed design (for construction), procurement, CQA and project management for the Camino Rojo Mine in Zacatecas, Mexico.

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Robinson Mine

Robinson Mine Tailings Impoundment Audit Prior to joining Tierra Group, our Team completed a third-party tailings impoundment audit. The audit included reviewing operational procedures, monitoring, design, and future tailings storage planning. Produced an audit report for company’s internal use. (Tetra Tech,…

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