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 were performed in accordance with ASTM D7002 and ASTM D7007 standards.
Tierra Group evaluated geotechnical and hydrogeological characteristics of Tajo Crimea Pit to determine in-pit tailings storage feasibility. The project scope defined geotechnical and hydrogeologic site conditions through field investigations, and in-situ pump testing. A 3D groundwater model was developed to…
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 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…
Tierra Group performed a Dam Safety Review (DSR) for Nyrstar’s tailings storage facility (TSF) located in Campo Morado (Guerrero, Mexico). Tierra Group served as the Tailings Reviewer to ensure conformity with local regulations, the Nyrstar Tailings Storage Facility (TSF) Standard,…
Tierra Group was contracted by Waterton Global Mining Company to prepare the FPCP for TSF No.1 at the Esmeralda Mine. TSF No.1 covered approximately 100 acres, included a rockfill embankment with a maximum height approximately 60 feet, and stored gold tailings. Work…
Tierra Group carried out a desktop Due Diligence review of a Preliminary Economic Assessment for a mine development project in the USA. Tierra Group’s review included; mine plan and production schedule, metallurgical testwork, process design, plant water balance, infrastructure updates, tailings…
Tierra Group completed an annual dam safety inspection (DSI) to meet both Nevada Division of Water Resources (NDWR) Dam Safety and Nevada Gold Mines (NGM) requirements. The DSI included reviewing monitoring data, a dam and appurtenant structures inspection, and a…
Creston Mascota Mine is located in Chihuahua, Mexico and is owned and operated by Agnico Eagle Mexico. Tierra Group designed the Phase 4 heap leach pad, buttress, which included geotechnical investigations, slope stability analyses and a water balance for Agnico…
Sweetwater Mine Permitting Tierra Group’s Team began work at the Sweetwater mine in 1993 assisting permitting and developing tailings impoundment management strategies for the mine. We successfully designed and installed an innovative internal seal for repair of the mine’s damaged…
Tierra Group conducted a Due Diligence Review for a project in Wisconsin, US.
Tierra Group International performed a Tailings Technical Due Diligence Review for a project in Armenia.
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…
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