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

San Albino

Dry Stack Tailings Storage Facility Design Tierra Group supported construction of the San Albino Mine in Nueva Segovia, Nicaragua. Tierra Group designed a dry stack drum filtered-tailings storage facility. A siting study optimized the dry stack location and minimized CAPEX and OPEX.…

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American Gypsum

American Gypsum Pit Planning and Support Tierra Group began working at American Gypsum’s Eagle-Gypsum mine located in Gypsum, Colorado in 2014 evaluating haul road improvements. A trade-off study provided a tool for American Gypsum to evaluate safety improvements including alternative haul road…

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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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El Cubo

Tierra Group provided Tailings Stewardship Services including a dam inspection, slope stability analysis review and operational improvements for Endeavour Silver’s El Cubo tailings storage facility in Guanajuato, Mexico.

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San Andrés Mine

Previous to Tierra Group, our Team performed a geotechnical forensics assessment, which determined that spent ore from an on-off leach pad operation had liquefied causing a debris flow, which threatened inundating a major river basin. A preventative detention buttress was…

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Mexican Hat PEA Update

Tierra Group conducted an update of the Mexican Hat Project’s Preliminary Economic Assessment. Tierra Group’s update included the heap leach facility design and preliminary stacking plan, waste rock storage pad, and crushed rock storage pad design.

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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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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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Bunker Hill

Dry Stack Tailings Storage Facility Tierra Group designed a dry stack TSF to store excess tailings from the underground paste backfill. The dry stack TSF was challenging, given the limited land area, steep terrain, seasonal cold weather, and surface water…

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Tajo Crimea Project

Tierra Group evaluated the Tajo Crimea Pit’s geotechnical and hydrogeological characteristics to determine in-pit tailings storage feasibility. The project scope defined geotechnical and hydrogeologic site conditions through field investigations and in-situ pump testing. Tierra Group developed a 3D groundwater model…

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Brushy Creek 2

Tierra Group was commissioned by Doe Run to design a new tailings storage facility at the Brushy Creek Mine. Tierra Group completed a geotechnical investigation including boring, classifying, and sampling soil and rock. Trade-off studies were performed to minimize construction…

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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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