Tshwane — The City of Tshwane currently faces several serious issues as sinkholes and power outages have wreaked havoc across the city.
The roads leading to the corner of Van Riebeeck and Trichardt streets in Lyttleton Manor were cordoned off after a sinkhole developed at the corner, causing a house bounty wall and part of the front yard to collapse. Another sinkhole formed on DF Malan Avenue in Lyttleton, The Citizen reported.
Ward councillor, Johan van Burren said the ground gave way on Saturday, with secondary cracks forming around the sinkhole, raising fears it could collapse.
Kholofelo Morodi, Tshwane MMC for Corporate and Shared Services, said the capital needs about R200-million to repair all the sinkholes in the city however it only has a budget of R14-million. TCG pic.twitter.com/ZbJtOElALE
— EWN Reporter (@ewnreporter) February 21, 2025
According to TimesLIVE, Mashigo said the sinkholes were due to a combination of internal stormwater drainage and a water leak. She said a long-term plan i in place to upgrade ageing services and water pipes.
“The main cause of the sinkholes is leaking water pipes, however, sinkholes also occur due to leaking sewer and stormwater pipes, pounding of surface water and leaking irrigation pipes,” he said.
The city has advised affected property owners and residents on safety aspects around the sinkhole and on safeguarding measures within the property.
“The dolomite bedrock is not only pure dolomite but there are other rock types like chert interlayered which don’t dissolve and other elements are also left after the dolomite dissolves. These materials are now loosely filling the voids and the cavities may also be filled with soil falling in from the surface,” said Van Rooy.
When concentrated water inflows occur, it can trigger sinkholes when the water erodes the material or if there is a void in the rock. He said the main action was to stop water leaking into possible sinkhole areas and prevent any inflows from stormwater.
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Compiled by Matthew Petersen