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Phase Two of Storm-Water Project Soon


 

South African-based Ninham Shand Consulting Engineers was appointed to handle the design and the stormwater management in Phuthaditjhaba and Qwa Qwa as well as the construction of several gravel roads. .
 

Phuthaditjhaba is located in the north-eastern Free-State and is bounded by Kwazulu-Natal to the south-east and Lesothu to the south-west. It has a total estimated population of 450 000 and, combined with Qwa Qwa, Harrismith and Kestrel, forms part of the Maluti-a-Phofung municipality in the Thaba mofutsanyana district council.

“The road that we constructed in the Qwa Qwa area is 10,3 km in length, of which 9,7 km includes stormwater channels with road crossings,” says Ninham Shand’s Rudi Beeslaar.

“The Phuthaditjhaba area was equally challenging, as we constructed a 12,2 km road and the length of stormwater channels with road crossings was a9,5 km in total. We installed approximately 100m of stormwater pipes with personnel access hatches and outlet structures,” he explains, illustrating the scope of the project.

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 varies from tarred raods to two-wheel tracks.

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 to control stormwater run-off,” he says.

“In terms of stormwater analysis, concrete stormwater side drains and road crossings were constructed while stormwater pipes with personnel access hatches and outlet structures were created when required,” Beeslaar continues.

Landscape problems hampered the development of the Qwa Qwa road, as the houses in the area were built with no formal structure. This presented a great challenge for the design of the road because it had to be woven between existing homes and theam often had to work with steep gradients.

According to Beeslaar, the Qwa Qwa ward councils specify firm guidelines in maintaining standards and acted as a medium between the community and the developer during the project. 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.

 


Rudi Beeslaar

 

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

The team at Ninham Shand has supported the government’s job creation initiative by ensuring that tasks are as labour-intensive as possible. Besides layerworks that are completed by machines, the rest of the activities use 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.

Stormwater pipes will also be sourced locally. 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 start shortly and is expected to receive a budget of R5-million for the completion of the remaining 1,6 km stretch that will include paving as well as stormwater systems.

 

Engineering News
July 2004
p.40

 

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 Last Updated: December 20, 2005
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