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 providing feasible and environmentally sensitive alternatives.
Tierra Group performed a pre-investment technical tailings due diligence review.
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…
Tierra Group provided a desktop and field review of B2Gold’s Santa Pancha Mine hydrogeology. The review identified data gaps in site data and provided recommendations for improve an existing site hydrogeology model and improve underground water management. The hydrogeologic model…
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…
The Midas Mine is located in northern Nevada, and is owned and operated by Klondex Mines LTD. The mine is an underground mine with an operating mill. The mine’s existing tailings facilities are nearing their end of operating life and…
El Mochito is an underground zinc/silver mine located in the Santa Barbara Mountains in north-central Honduras. Tierra Group’s Team has been providing Tailings Stewardship Services at El Mochito continuously for the past 26 years. Since 1989, Tierra Group engineers have provided…
Tierra Group performed geotechnical investigation, water balance, and the Phase 2 heap leach pad (HLP) optimization design at Agnico Eagle’s La India Mine in Sonora State Mexico. Tierra Group provided Construction Quality Assurance (CQA) during initial construction and expansion of…
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…
Tierra Group developed a site-wide water management plan to improve operational water usage and management at Jaguar Mining's Turmalina Complex in Minas Gerais, Brazil. Turmalina is a zero-discharge facility that required optimizing tailings supernatant usage in the process, enhanced evaporation…
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…
Tierra Group led a multi-disciplinary team to provide a risk matrix which included Geotechnical, Hydrogeology, Hydrology, and Mining & Reserves for a project in Nevada, US.
Tierra Group completed a geotechnical investigation, which included overseeing hollow stem auger (HSA) drilling and laboratory testing, that characterized the existing earthen dam. Tierra Group completed a low-level outlet structure design that was believed to have been compromised by internal…
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