OVERVIEW

Red Back acquired the Tasiast Gold Mine from Lundin Mining Corporation in August 2007. The Tasiast gold process plant features a 3-stage crushing circuit followed by milling and carbon-in-leach. The Tasiast CIL process plant throughput has been expanded from 1.4 to 2.8 MTPA. The expansion was completed in the fourth quarter of 2009.

SENET, the EPCM contractor for the original construction of the Tasiast plant, was awarded the EPCM contract for the plant expansion. The new contract covered all major work items for the expansion, including upgrading the crushing circuit conveyors, an additional mill feed bin, gravity circuit , a new pre-leach facility, the existing CIL system and the tailings disposal pumps. The elution circuit was reconfigured from pressurized ZADRA to AARL method and a new column installed. The existing gold room equipment was installed in a new gold room with increased electro winning capacity.

The detailed engineering design and procurement was completed by SENET in Johannesburg, South Africa. The majority of the mechanical and electrical equipment was procured in South Africa. All the structural steel work was fabricated in and shipped from South Africa. The site construction was managed by SENET using a local civils subcontractor and SA expat mechanical, structural, electrical and instrument contractors.