The Pierina gold mine is located in the Cordillera Negra in the Peruvian Andes, approximately 20 kilometres directly north of Huaraz, Perú at an elevation of 4,100 metres. Surface mining began in 1998 with the ore processed by valley fill heap leaching.
Ausenco has been working on the project for over two decades, providing Barrick with innovative design solutions for heap leach pad operations and best in class construction monitoring support services in a very challenging environment.
We partnered with Barrick to help meet their goals of sustainable economic development and protecting the environment. During this time we developed some industry firsts including: placement of the leach pad liner system on near vertical slopes; high head internal leach pad pregnant solution pond with vertical caisson pumping system; leach pad raincoat and surface water management system providing increase stream flow below the project, and one of the first compartmentalised valley fill heap leach leak detection systems.
Ausenco’s scope of services includes: