In 2010 Dawnus commenced a series of projects as part of the infrastructure works at Tonkolili Iron Ore Mine in central Sierra Leone, for client Africa Minerals Ltd. Since starting on site we have been engaged on numerous projects and support tasks.
These works include construction of mine haul roads, foundations and related infrastructure for major processing facilities and crushing plant, process waste storage weir and a tailings dam. These works have included 1,100,000m3 of earthworks.
Infrastructure, foundations and enabling works we carried out at the mine included:
Not all of the specified materials are available in Sierra Leone, and Dawnus met the challenge of procuring steel trusses, roof coverings, finishes and fit-out materials from overseas. All aggregates for concrete, filter media to dams, mass rock fill and rail ballast required at Tonkolili were produced by the on-site Wendugu Quarry.
Our onsite laboratory undertook testing and analysis of all construction materials, products supplied, produced and incorporated into the works.
We employed full design, ground investigation and geotechnical support teams to assist in commissioning all of the works.
On all our projects in West Africa we have employed local people and provided training and development in a range of construction disciplines, to European standards.