Tierra Group completed an annual dam safety inspection (DSI) to meet both Nevada Division of Water Resources (NDWR) Dam Safety and the client's requirements. The DSI included reviewing monitoring data, a dam and appurtenant structures inspection, and a DSI report.
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.
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;…
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.
Tierra Group conducted a Preliminary Site Assessment of a potential large-scale landslide near the El Diamante Hydropower Complex in Matagalpa, Nicaragua.
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…
Sterling Mine is an underground gold mine in southern Nevada which recovers gold 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 closure…
Tierra Group prepared a Heap Leach Facility (HLF) design to an FS level, including a geotechnical investigation, HLF design basis and criteria, hydrology and water balance, geotechnical engineering analysis, specifications, material quantities, and design report. In addition, Tierra Group prepared…
Tierra Group updated the County’s Standard Operating Procedures (SOPs) for Municipal Operations to maintain the County’s compliance with the requirements for stormwater discharges from the County’s municipal separate storm sewer system (MS4) under the Colorado Discharge Permit System (CDPS). Tierra…
2023 Dam Inspections/Review Tierra Group completed a site visit to inspect three tailings storage facilities (TSFs) and the Evaporation Pond. In addition to the site visit and dam inspections, design and monitoring reports (prepared by others) were reviewed for each…
Tierra Group engineers designed La Esperanza TSF, a 2.1-km long, 35-m high, earthfill tailings dam with an HDPE lined impoundment footprint of 840,000 m2. Tierra Group designed and provided Construction Quality Assurance (CQA) for all subsequent downstream dam stages. Stage…
Serving on Newmont Goldcorp’s Tailings Independent Review Board, Tierra Group provided an Independent Dam Safety Review for the Dona Lake Mine tailings storage facility in Pickle Lake, Ontario, Canada.
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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