Dawnus was extensively involved in the refurbishment of 50km of existing railway and the construction of over 85km of new rail in Sierra Leone, as part of a series of improvements to the logistics corridor that runs from Tonkolili iron ore mine to the port facility at Pepel.
The new rail line was constructed through virgin bush, scrub forest and swamps taking in some extensive earthworks for new cuttings and embankments. The refurbishment of the existing rail consisted of removal, widening and preparation of formation and the stabilisation and reconstruction/widening of embankments.
Over 250 multi-plate culverts (0.9m to 2.4m diameter) were constructed, and 5.5 million cubic metres of cuttings and embankment were formed during a seven month period, which had to be carried out during the dry season, between November 2010 and June 2011. The site team rose to this challenge by working 18.5 hours a day, in two shifts, throughout this period.
We worked with our client African Minerals and local communities to identify sacred areas that had to be avoided, and carried out realignment to avoid chimpanzee and other wildlife habitats of special interest.
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.