Road & Transport

The Contract entails the reconstruction of approximately 63 km of road along National Route R61 between Tarkastad and Queenstown.  The existing road comprised of a 2 lane single carriageway with a narrow surfaced width of approximately 6.2 m.

There are 5 large bridges along the route, 1 major stormwater culvert and many minor stormwater culverts. As part of SANRAL’s National Roads upgrade requirements, the road reserve was widened to a 50m wide.

All the existing drainage structures along the route were modified/lengthened as required. Bridge B0198, situated close to Tarkastad was completely reconstructed to accommodate the class 2 road flood requirements. This included raising the existing deck height, lengthening the bridge and widening it to suit the new road width.

The other 4 existing bridges were widened to accommodate the new surfaced road width. All bridges and culverts were widened to match the new road reserve width. The area consists predominantly of dolerite intrusions and sandstones, making this area a good source of pavement construction materials. 15 Borrow pits where identified along the route. The new road surface will comprise of a Cape Seal with a double slurry. The surfaced width will be 9.4m, with a 2.0m wide gravel shoulder. The project included upgrading works under Double Bituminous Surface Treatment, and rehabilitation and widening works of urban roads.

The project included the following Drainage Infrastructures: (i) Road surface drainage with the drainage of stormwater runoff; (ii) Subsurface drainage with the interception and disposal of groundwater flows; (iii) Erosion protection measures for the slopes.