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 energy dissipation structures, and an automatized mechanical-electrical water and sediment pumping system.
Tierra Group supported proposed Rapid Infiltration Basins Geotechnical Investigation at Au-reka Gold Corporation’s Cove Project in Nevada. Investigation included borehole drilling, test pits, infiltration testing and permeability testing.
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…
Hollister Waste Rock Facility Storage Tierra Group performed a third-party peer review of a Waste Rock Storage Facility (WRSF) design at Klondex Mines’ (Klondex) Hollister Mine in northern Nevada. The WRSF, as designed, involved lining the mine’s existing West Pit…
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…
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…
Tierra Group conducted an Independent Technical review of Vista Gold Corp’s Mt. Todd Tailings Storage Facility Expansion in Northern Territory, Australia. Tierra Group assisted the 2025 Mt. Todd feasibility study project providing TSF and waste rock dump design and water…
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…
Tailings Storage Facility (TSF) AuditTierra Group performed the La Caridad TSF Audit. Tierra Group’s scope of work entailed a site visit, data review, dam safety inspection (DSI), site interviews, and best management practices training for operations personnel.
Tierra Group performed a 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 analysis was performed…
Tierra Group provided design review and technical direction at Hod Mine in the Artvin Province of Turkey. Work included detailed design of potentially acid generating and non-acid generating waste dump facilities, their appurtenant structures and stormwater management design for the…
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…
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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