Group Five Roads Africa is making steady progress on the Injaka Dam in the Bushbuck Ridge area of Mpumalanga. The dam forms part of a R234 million water project for the Sabie River catchment area and is the first phase of a scheme to provide potable water to over two million people in the area. In addition, the dam will be used to supplement the low water flows of the Sabie and Sand Rivers in an effort to protect the natural riverine environment in the Sabie Sand Game Reserve and Kruger National Park .
The Mmabatho Waterworks had to accommodate a relatively high proportion of treated sewage inflow and the pollutants washed from the town directly into the dam The Mafikeng-Mmabatho conurbation has been served with dolomitic water from the Molopo Eye for countless decades. As the demand increased beyond the surface outflow from the eye, boreholes were sunk into another aquifer, the Grootfontein compartment. At the same time, local farmers have been tapping these sources for irrigation water, significantly increasing the total withdrawal, resulting in over-utilisation.
The construction worker's wolf whistle may turn out to be his swan song as robots prepare to muscle in on the construction site in much the same way that they colonised the car factory Japan, which operates two-thirds of the world's industrial robots, is leading the construction revolution . In a country where 95 per cent of the workforce sees itself as middle class, it was inevitable that Japan would be among the first to introduce automation to factories. A labour shortage during Japan's boom years also put automation in big demand. Now that there is less money in Japan for automation and research, the human element is returning to the car manufacturers' shop floors. However, there are still some jobs the Japanese are reluctant to do, boom or bust.
The survey of the 'Water Resources of South Africa 1990' took five years to complete. The existing division of South Africa into primary, secondary and tertiary catchments was further subdivided to create close on 2 000 quaternary catchments. The results of the study were published in six volumes, covering different regions of the country. Numerical information is provided in a set of appendices and spatial information is presented as a set of ten maps created using GIS. The numerical and spatial information is also available on a CD-ROM.
A N$100,7 million Ministry of Works, Transport and Communication contract to rehabilitate the 192 km section of road between Oshivelo and Oshakati in Namibia has been awarded to the G2 Joint Venture (G2) comprising Grinaker Namibia and Group Five Contracting Namibia. Consultants for the project are Africon Namibia Inc. Wolfgang Hundemer, Chief Engineer, Construction Services and Contracts, for the Ministry of Works, Transport and Communication says: 'This section of road between Oshivelo and Oshakati can be considered a lifeline between central Namibia and the northern regions.
The provision of adequate facilities for traffic has always been a problem but the development of the motor vehicle has demanded a new approach to the problem. From traffic volume data collected in the past analyses have been made to arrive at a reliable method of estimating present day and future traffic volumes. To study traffic volumes on each road in detail would be impossible and a traffic counting system has had to be developed in which typical samples of traffic volumes, control counts, are taken and estimates made from infrequent short term traffic counts, coverage counts, in the road system. The theory of probability of error in a normal distribution is used to determine the probable error in the control and coverage counts.