The design and implementation of the development venture was requested by the Maluti-a-Phofung Municipality in the beginning of 2003 and involves the stormwater management of these areas as well as the construction of a number of gravel distributor roads.

The topography of the region ranges from steep mountainous slopes with numerous valleys in the south, to rolling hills in the north, while the existing network of roads vary from tarred roads, to two wheel tracks.

Ninham Shand Consulting Engineers was appointed to handle the design and contract management of the project. “The road that we constructed in the Qwa Qwa area is 10,3 km in length, of which 9700 meters include stormwater channels with road crossings,” says Rudi Beeslaar from Ninham Shand.

“The Phuthaditjaba area was equally challenging, as we constructed a 12,2 km road and the length of stormwater channels with road crossings was 9500 meters in total. We installed approximately 100 meters of stormwater pipes with manholes and outlet structures,” explains Rudi, illustrating the scope of the project.

Interactive engineering design software called Civil Designer was used to design the horizontal and vertical road alignments. “The horizontal alignment was governed by the town-planning layout of the area, while the vertical alignment was designed to follow the topographical features with some adjustments in order to control the storm water run-offs.”

“In terms of stormwater systems, concrete stormwater side drains and road crossings were constructed while stormwater pipes with manholes and outlet structures were created when required”.

Landscape problems hampered the development of the Qwa Qwa road,  as the houses were built        

with no formal structure. This presented a great challenge for the design of the road because it had to be woven in-between existing homes and the team often had to work with steep gradients.

According to Rudi, the Qwa Qwa ward councils specify firm guidelines in maintaining standards and act as a medium between the community and the developer during the project’s completion. The design was completed in accordance with the design criteria as set out by the Maluti-a-Phofung Municipality and in accordance with the “Guidelines for the Provision of Engineering Services and Amenities in residential township development” manual.

Community reaction on the project was very positive because the undeveloped area was previously inaccessible, making transportation impossible. “With the new road, everyone’s lifestyle will improve because people will have the benefit of using taxis, buses and vehicles for transportation to various destinations,” explains Rudi.

The project has been divided into two phases, with phase one receiving a budget of R1,2 million for the creation of 470m of paved road with stormwater drainage. Phase two will commence shortly and is expected to receive a budget of R5 million for the completion of the remaining 1,6km stretch that will include paving as well as storm water systems.

The team at Ninham Shand has supported the government’s job creation initiative by ensuring that tasks are as labour intensive as possible. Besides layer works that are completed by machines, the rest of the activities are done by means of manual labour. The Qwa Qwa region is divided into various wards and local workers are used within each ward so that the community can obtain maximum benefit from the project.

In addition to this, material is sourced locally and it is likely that the road paving will be received from Lancaster, a factory in Qwa Qwa that is responsible for the manufacture of bricks. Storm water pipes will also be sourced locally.

All earthwork calculations were done in Civil Designer before the information was transferred into AllyCAD in order to complete the finishing touches to the design.

Computer Graphics (CG)
August 2004
pg 14