Tierra Group conducted an expansion pit slope review that included a technical memorandum of site observations/investigation, a review of past and new data, a basic slope analyses that developed recommendations for slope angles that determined if the Pit Expansion would be stable, and provided suggestions for a slope monitoring program.
Tierra Group performed a detailed engineering design for a 4km access road and diversion channel, and the feasibility design for water diversion structures (including electrical and mechanical layout for a pump station). Tierra Group also performed a geotechnical investigation and updated…
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 performed an initial site visit to Coeur Mining’s Palmarejo Mine to conduct dam safety inspections of the tailings storage facility, environmental control dam, water diversion dam, and water diversion channel. Prior to the site visit, Tierra Group reviewed…
After preparing the design to modify two existing lined ponds at the Turquoise Ridge Mine Tierra Group supported the construction by serving as the resident engineering while also providing quality assurance for the project. Following completion of the relining project…
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 conducted geo-electrical testing to locate leaks present in the geomembrane liners underlying a Solution Conveyance Canal, Sumps 1 and 2, and the Intermediate Pond at Timmins Gold Corp’s San Francisco Mine in Sonora, Mexico. Leak detection testing procedures…
Tierra Group reviewed and provided pit slope recommendations and conducted hydrological assessments for the Resource 1 and 2 deposits water management system at Troy Resources’ Karouni Mine (Karouni). Advanced pre-feasibility level recommendations for pit development were provided based on benchmarking…
Tierra Group completed a trade-off study to evaluate raising the existing Tailings Storage Facility (TSF) or building a new TSF at KGHM's Robinson Mine in White Pine County, Nevada. An Alternatives Decision Matrix (ADM) was developed using weighted qualitative and quantitative parameters…
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…
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 performed a third-party design review of a Cemented Tailings Facility (CTF) and multiple process and freshwater ponds. Tailings will be mixed with cement at the planned paste plant and deposited in the CTF along with underground mine development…
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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