Johannesburg’s pursuit at rehabilitating the Emmarentia Dam in pursuit of environmental sustainability.
The City of Johannesburg (COJ) has finally taken the steps to enhance the iconic landmark that is the Emmarentia Dam to increase the water capacity and clean the silt benefiting both wildlife and residents of the community.
Emmarentia Dam is closed for the time being until construction is completed. The Environment and Infrastructure Services Department (ESID) in the City of Johannesburg (COJ) has embarked on a transformative endeavour to revamp the iconic Emmarentia Dam in partnership with Johannesburg City Parks and Zoo (JCPZ). The project, meticulously planned for several years, aims to address the accumulation of silt and alien vegetation in the dam while enhancing its infrastructure to accommodate increased water flow and filtration. The process began in February.
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The armoflex blocks are an essential component of the embankment. They are placed underneath the embankment and serve as a protective layer for the soil. The armoflex blocks help to stabilise the embankment and prevent erosion. To further protect the embankment, a geo-textile is laid on top of the armoflex blocks. The geo-textile acts as a barrier, preventing water from seeping through and causing damage to the embankment. It also helps to reinforce the stability
Project Progress and Scope of Works
Malcolm Fiddes, the project coordinator from JCPZ, reported that the project is currently 65% complete as of June 14. This included a comprehensive scope of works including preliminary and general tasks, upper dam embankment rehabilitation, upper dam spillway rehabilitation, and the
de-silting of the basin. Communication liaison officer on-site, Lidenlani Ndlovu, explained that the project aims to better manage water flow and reduce the risk of flooding. Regular updates will be provided at key milestones during the eight-month project duration. Visitors are encouraged to stay informed through signage, community alerts, and updates on official channels.
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Desilting and environmental restoration
The construction of the spillway wall involves the reinforcement of the structure to ensure its stability. Concrete is cast to form the spillway wall, which is designed to withstand the force of the flowing water. “In addition to the spillway wall, wingwalls are built to support the structure. The wingwalls play a crucial role in directing the water flow into the spillway. The wingwalls are positioned in such a way that they channel the water towards the designated
Blessing Maumela, the project manager, provided an insightful overview of the desilting process, highlighting the significant impact of silt accumulation on water levels and quality.
He said that the public can walk around the dam but avoid the construction for their safety.
Maumela emphasised the machinery-based approach to remove silt and create space for water to flow, facilitating the excavator’s work. Maumela also underscored the project’s focus on environmental restoration, with the removal of invasive plants and the enhancement of water filtration for the lower dam. “The rehabilitation aims to restore the dam to its original state, ensuring a healthier ecosystem for both wildlife and visitors.”
Walk-in visits to the site office are welcomed, where community engagement and information sharing can take place through the Community Liaison’s Office.
“We will utilise various communication channels, including community WhatsApp groups, Facebook pages (such as Montgomery Park, Northcliff and Emmarentia), and local councillors,” added Ndlovu.
The public can also stay updated on plans through park management communications, community meetings, and official updates from the Johannesburg Roads Agency (JRA) and related authorities.
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