Empire State Mine

Project Highlights:

  • Dam Breach Analyses
  • Geotechnical Investigation
  • OMS Manual
  • Emergency Action Plan
  • Trade-Off Study
  • Dam Safety Review
  • Water Balance

Dam Breach Analyses

Tierra Group prepared a DBA to evaluate potential downstream impacts due to a hypothetical failure (breach) in three components of Empire State Mines (ESM) tailings storage facility (TSF): North Dam (ND), South Dam (SD), and West Perimeter Dyke (WPD). In addition, Tierra Group developed the ESM Operations, Maintenance, and Surveillance (OMS) Manual and Emergency Action Plan (EAP).

Geotechnical Characterization Study

Tierra Group performed a geotechnical characterization study, including geotechnical field investigation (drilling and sampling), laboratory testing, geotechnical analyses and report, and operational engineering analysis.

Tailings Storage Facility (TSF) 4 Technical Studies

Tierra Group provided technical support services, including a dam safety review (DSR) report, GoldSim water balance, and developed a TSF trade-off study to identify potential expansion opportunities.

Project Highlights:

  • Dam Breach Analyses
  • Geotechnical Investigation
  • OMS Manual
  • Emergency Action Plan
  • Trade-Off Study
  • Dam Safety Review
  • Water Balance

Similar projects

Fire Creek Mine

Tierra Group conducted a siting analysis for a new WRSF to support the mine’s future production increase as part of the Preliminary Feasibility Study (PFS). In addition to supporting the PFS, Tierra Group assisted in preparing and submitting several engineering…

VIEW PROJECT

Oracle Ridge Copper

Tierra Group represented Oracle Ridge Mining as the Qualified Person for portions of the feasibility-level design including the Dry Stack Tailings Storage Facility (TSF) Design, Site-Wide Stormwater Management, Water Supply Pipelines, Haul Road and Access Road Design Improvements, and the…

VIEW PROJECT

Hermosa Project

Tierra Group provided a Third-Party review of the Hermosa Project Tailings Storage Facility Design and Construction stages 1 & 2 in Patagonia, Arizona

VIEW PROJECT

Pirquitas Tailings Review

Tierra Group prepared a civil engineering design for SSR Mining’s Mina Pirquitas in Jujuy Province, Argentina and developed current and future water-mass balance through hydrological/hydraulics calculations and modeling. Tierra Group developed the ultimate tailings surface, deposition plan, spillway relocation analysis,…

VIEW PROJECT

Bald Mountain Mine

Tierra Group assisted the Bald Mountain Mine Project Development Team with an evaluation of potential uses for spent ore on legacy heap leach facilities. Tierra Group completed a collaborative trade-off study with site personnel evaluating spent ore use as overliner…

VIEW PROJECT

Isabella Pearl

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…

VIEW PROJECT

Pinos Altos Mine

Tierra Group provided slope stability analysis for Agnico Eagle’s dry stack tailings storage facility containing 330,000 tonnes of tailings.

VIEW PROJECT

Sepon Mine CQA

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.

VIEW PROJECT

American Gypsum

American Gypsum Pit Planning and Support Tierra Group began working at American Gypsum’s Eagle-Gypsum mine located in Gypsum, Colorado in 2014 evaluating haul road improvements. A trade-off study provided a tool for American Gypsum to evaluate safety improvements including alternative haul road…

VIEW PROJECT

Goldstrike Mine

Engineer of Record Barrick’s Goldstrike Mine processes 30,000 tons of gold ore per day from its combined open-pit/underground operations located in the historic Carlin Trend in Nevada, U.S.A. Goldstrike’s tailings are stored in the North Block Tailings Disposal Facility (NBTDF).…

VIEW PROJECT

Douglas County Public Works

Tierra Group updated the County’s Standard Operating Procedures (SOPs) for Municipal Operations to maintain the County’s compliance with the requirements for stormwater discharges from the County’s municipal separate storm sewer system (MS4) under the Colorado Discharge Permit System (CDPS). Tierra…

VIEW PROJECT

Yauricocha Mine

The Yauricocha Mine is a polymetallic (copper, lead, zinc) underground mine located in Yauyos Province, Lima, Peru. Tailings are deposited in the Yauricocha Tailings Storage Facility (TSF) located 3km from the process plant. Tierra Group was engaged in 2015 to…

VIEW PROJECT