Pierina Mine

Pierina Mine

Minera Barrick Misquishilca S.A.

Huaraz, Perú

  • Legal review
  • Risk assessment
  • Water balance
  • Water treatment
  • Sludge management
  • Cost estimate
  • Geochemistry
  • Future land use
  • Load flow analysis
  • Decontamination, dismantle, demolition
  • Hydraulic analysis
  • Cover design
  • Mercury removal
  • Seepage modeling
  • Financial modeling
  • Pipeline design
  • Water management
  • Hydrological studies
Project Overview

The Pierina Mine (UM Pierina) gold mine is located in the Callejón de Huaylas in the Peruvian Andes, approximately 10 kilometres directly north of Huaraz, Perú at an elevation of 4,100 metres.

Project Role

Knight Piésold was retained by Minera Barrick Misquishilca S.A. (MBM) to prepare a pre-feasibility study (PFS) for closure of the heap leach facility (HLF), waste rock facility (WRF), and auxiliary infrastructure.

Knight Piésold adopted an integrated risk-based approach to identify, evaluate, compare, and ultimately select preferred closure options that mitigated risk exposure while exploring opportunities. This involved following a structured and phased approach that considered the interfaces and integration between key focus areas.

The work was executed through five main engineering tracks: water, geochemical, data, constructability, and soil cover.

Knight Piésold’s services included:

  • Producing an integrated water quality model in GoldSim using the geochemical and water balance outputs
  • Evaluating renewable energy options and opportunities
  • Identifying key water management/treatment phases and timeline considering the changing conditions of the life of the closure period
  • HLF/WRF closure: physical, hydrological, and chemical stability
  • CAPEX, OPEX, and financial modeling