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Trans-Caledon Tunnel Authority (TCTA) is a state-owned entity mandated by the Minister of Water Affairs and Forestry to implement and fund raw bulk water infrastructure to supply areas with limited water resources.

TCTA implements projects, from the development of economically sustainable funding models; to the design and implementation of environmental management and socio-economic strategies; through to the design of cost-effective and environmentally-sound infrastructure.

The Vaal River Eastern Sub-system Augmentation Project (VRESAP) was officially inaugurated by the Minister of Water Affairs and Forestry, Mrs Lindiwe Hendricks, on the 1^st of April 2009.

VRESAP was initiated in 2004 as an emergency project aimed at increasing the yield of the Vaal River Eastern Sub-system to specifically address the growing water demands of SASOL and Eskom in the Mpumalanga Highveld. The project, also known as the Vaal Pipeline Project, transports water via a 115km long buried steel pipeline from the Vaal Dam reservoir to Knoppiesfontein near Secunda.

In her address, Minister Hendricks said she was encouraged by the fact that women had also benefited from the project. Six women-owned emerging companies from Mpumalanga, Rustenburg, Pretoria, Soweto and Johannesburg were trained to install air valve chambers.

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