The La Arena gold mine is located in northern Peru, 480 km north-northwest of Lima. The mine consists of two types of mineral deposits: high sulfuration epithermal auriferous mineralization embedded in oxidized gap sandstone within the Chimu Formation, and copper sulphide and gold mineralization housed in multiple intrusion fased porphyry.

Anddes contributes to the success of the La Arena project, through:

• Geomechanical analysis of slope stability, pit slope design.
• Determination of sediment quantity and cumulative impact with extensions and modifications of mining infrastructure, The Sand Project Phase 2.
• Detail Engineering of Phase 4 of the Au Oxide Leaching Pad with High Cu.
• Basic Engineering of Phase 5 of the Leaching Pad.
• Basic engineering (for permits) of the sulphide dump in an area adjacent to Phase 4A.
• Detail engineering of Phases 3B and 4 of the Dump 2.
• Basic engineering of Phases 8 and 9 and the East Dump and general arrangement of water management.
• Evaluation of the dynamic 3D stability of the leaching pad for the exposure time it will have during operation.
• Detailed Engineering of the Leaching Pad Phase 5.
• Detailed Engineering of the Leaching Pad Phase 4A3.
• Periodic visits to the mine and review of information on geotechnical instrumentation and support in the sincerity of foundations and evaluation of slope stabilities in the stacking of the dump 2.
• Diseño a nivel de ingeniería básica del pad de lixiviación Fases 4B y 4C, para permisos.
• Supervisión CQA-CQC de las actividades de movimiento de tierras y la supervisión CQA de la instalación de geosintéticos durante la construcción del Pad Fase 4 y Botadero 2.
• Actualización de ingeniería básica del Pad de lixiviación Fases 4B y 4C.
• Evaluación del diseño de los taludes del nuevo tajo Norte para efectos de presentación en el tercer MEIA.
• Diseño a nivel de ingeniería básica del Botadero 2 Fase 5.
• Actualización del manejo de drenaje superficial de las instalaciones que forman parte de los componentes del MEIA 3.
• Detailed Engineering of the Leaching Pad Phase 4B.
• Geotechnical physical stability assessment of the existing BM1.
• Collection and distribution of organic material in Botadero 2 for the processing of permits.
• Update of the seismic hazard study and risk assessment associated with the Calaorco and Norte catchment slopes.
• Preparation of the manuals for the inspection and geotechnical monitoring of the leaching pad, Botadero 2 and Tajos Calaorco and Norte.
• Basic engineering of the sulphur dump from the basic engineering of the Botadero 2 Phase 5 for MEIA3 lift.
• Description of the management of the surface drainage of the Botadero 2 footprint in Phases 3B2, East and Botadero 4.
• Detailed Engineering of the Leaching Pad Phase 4B.
• Geotechnical physical stability assessment of the existing BM1. Collection and distribution of organic material in Botadero 2 for the processing of permits.
• Update of the seismic hazard study and risk assessment associated with the Calaorco and Norte catchment slopes.
• Preparation of the manuals for inspection and geotechnical monitoring of the leaching pad, Dump 2 and pit Evaluation of the dynamic 3D stability of the leaching pad for the closing condition. Stage 4C leaching pad detail engineering.
• CQA/CQC supervision of earthmoving activities and CQA supervision of the installation of geosynthetics during the construction of Phases 4A-3, 4B and 4C of the leaching pad, Phase 3B of the Dumpsite 2, Dumpsite