La Arena

La Arena is located in the La Libertad region, in northern Peru, approximately 480 km north-northwest of Lima. What distinguishes this project is its dual geological nature, as it comprises two types of mineral deposits: high-sulfidation epithermal gold mineralization hosted in sandstone and oxidized breccias within the Chimú Formation, and copper-gold sulfide mineralization hosted in multiphase intrusive porphyries. The operation began production in 2011 and has undergone life extension through exploration and development of its main area and the additional La Arena II project.

In this context, a series of specialized services and studies were carried out to ensure the safety, efficiency, and sustainability of the operation, as detailed below:

• Geotechnical and geomechanical studies: Studies were conducted for foundations, slope stability, leach pads, waste dumps, open pits, and mining infrastructure, including 2D and 3D static and dynamic analyses, seismic studies, and laboratory testing.
• Pad, waste dump, and storage facility engineering: Conceptual, basic, and detailed engineering was developed for leach pads, waste rock and organic material dumps, tailings storage facilities, and ponds, optimizing mine capacity, safety, and operational continuity.
• Stacking planning and optimization: Stacking plans, discharge strategies, and storage capacity optimization for waste and ore were developed, contributing to the extension of the useful life of mining components.
• Water management and drainage: Surface drainage systems, water balance, water management, and sediment control were developed and updated, including the design of hydraulic structures and riverbank protection works.
• Supervision and quality assurance (CQA/CQC/MQA): Supervision was provided for earthworks, geosynthetics installation, and geomembrane manufacturing, ensuring compliance with technical and construction standards.
• Engineer of Record (EoR): Services included monitoring, geotechnical analysis, instrumentation review, and continuous technical support during operation.
• Environmental studies and permitting: Feasibility studies were prepared and engineering was developed for environmental permits (MEIA, ITS, and Environmental Management Plan), as well as technical documentation to support expansions and operational modifications.
• Complementary infrastructure design: Studies and designs were developed for complementary infrastructure, including civil, road, and urban works, electrical substations, communication towers, and community projects, integrating technical solutions aligned with the mining operation.