Tierra Group designed a raise of the tailings storage facility (TSF) and provided construction quality assurance for the Los Gatos project in Chihuahua, Mexico.
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 calculations and developed a technical memorandum requesting temporary authorization to impund within the current stage freeboard limits.
Tierra Group performed a Dam Safety Review (DSR) including geotechnical investigations and seepage and slope stability analyses for a 20-m high TSF at this 300‑tpd underground polymetallic mine. The audit was prepared following the Mt. Polley tailings dam failure in…
Tierra Group provided an annual third-party tailings storage facility and heap leach facility technical review at Anagold’s Çöpler Gold Mine in Middle Anatolia, Turkey.
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.
Tierra Group served as an independent subject matter expert for the Quinsam Coal Corporation (QCC) Independent Tailings Review Board (ITRB) in British Columbia, Canada. The annual review process included review of existing documents, a site visit, and collaborative meetings with…
Tierra Group performed a forensic study to determine the cause for volumetrically non-compliant leakage volumes occurring in the heap leach facilities leak detection system. Tierra Group reviewed the facility design, engineering and construction quality assurance (CQA) information, construction as built…
Tierra Group completed the design for two 3-meter upstream raises to an existing paste tailings storage facility at New Jersey Mining Company’s New Jersey Mill site near Kellogg, Idaho. Work included performing a cone penetration testing (CPT) investigation of the…
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.
The Stibnite 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…
The Aurora Mine Mill Facility (previously Esmeralda Mill) is located in the historic Aurora mining district of the eastern Sierra Nevada Mountain Range in Nevada, USA. Aurora recently, with the support of Tierra Group completed a Minor Modification to the…
Tierra Group is the Engineer of Record (EoR) for two tailings dams at the Aurora Mine. Tierra Group provided annual dam safety inspections for the tailings dams to meet Nevada Division of Water Resources (NDWR) Dam Safety permit requirement. Work included…
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