Tierra Group performed Resident Engineering and Construction Quality Control/Assurance during a pilot Heap Leach Facility construction, and Life of Mine Heap Leach and Tailings Sorage Facility siting, design, and tailings management at Lane Xang Minerals' Sepon Mine in Laos.
Tierra Group performed an independent technical peer review of the Boleo Mine’s operating tailings storage facility design. In doing so Tierra Group identified several design modifications that when implemented for future stages will reduce sustaining capital cost expenditures by several…
Tierra Group performed calculations and developed a technical memorandum requesting temporary authorization to impund within the current stage freeboard limits.
Tierra Group provided detailed design and Construction Quality Assurance (CQA) services on a new heap leach pad at the San Antonio Project in Mexico.
Tierra Group is implementing a corporate Tailings Stewardship Strategy (TSS) at all of ASARCO Grupo Mexico’s mines in Arizona, USA (Hayden, Mission and Ray mines). Tierra Group conducted a site visit to each site to perform dam safety inspections, interview…
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 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 conducted a pre-investment due diligence Technical Review including; Environmental, Permitting, and Social License; Geology and Mineral Resources; Mining and Reserves; Metallurgy and Process Design; Geotechnical, Hydrology, and Hydrogeology; Project Infrastructure, Heap Leach Facility, and Waste Disposal; and Capital…
Tierra Group performed a TSF Design Review to support a NI 43-101 compliant Feasibility Study. The TSF design incorporated a paste tailings disposal method in an environmentally sensitive fisheries habitat in south-central Montana.
The Ernesto e Pau-a-Pique (EPP) Mine is located in the Municipality of Pontes e Lacerda, at 440 kms west of Cuiba City, Brazil. The mine is operated by Apoena Mining, a subsidiary of Aura Minerals Inc. Tierra Group was retained…
Tierra Group performed a technical peer review of the Isabella Pearl heap leach facility (HLF) owned by Gold Resource Corporation. Isabella Pearl mine is located at the west end of the Santa Fe mining district in the Walker Lane gold…
Tierra Group conducted an Independent Technical review of Vista Gold Corp’s Mt. Todd Tailings Storage Facility Expansion in Northern Territory, Australia.
Tierra Group performed a 3rd party engineering design peer review of a tailings storage facility expansion design. The review resulted in the owner realizing $650,000 in cost savings without compromising the facility's design integrity over the original design. Tierra Group also…
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