Lesotho Highlands Water Project Delays Prompt Vaal Dam Support

The closure of the Lesotho Highlands Water Project has been extended by three weeks due to maintenance issues in the water transfer tunnels. Despite complications, the Vaal Dam’s capacity ensures uninterrupted water supply for Integrated Vaal River System users. Weather warnings have been issued for severe thunderstorms across the regions.

The Department of Water and Sanitation has reported an extension in the closure of the Lesotho Highlands Water Project’s water transfer tunnels, now delayed by three weeks due to maintenance issues. Wisane Mavasa, the Department spokesperson, highlighted significant complications experienced within the Delivery Tunnel South, specifically weather-related impacts and technical difficulties faced by the Lesotho Highlands Development Agency (LHDA). Initial closure dates were from October 1, 2024, to March 31, 2025, with updates on water release forthcoming upon the completion of maintenance work.

The delays are attributed to unexpected seepage issues linked to a change from manual to automated sandblasting techniques, exacerbated by humidity levels. The contractor is actively sourcing additional equipment to mitigate these seepage challenges, but as Mavasa noted, “the delay could not be avoided.” Conversely, maintenance efforts on the South African side, managed by the Trans Caledon Tunnel Authority (TCTA), remain on schedule.

Despite the delays caused by heavy rainfall and subsequent flooding impacting Gauteng, the Vaal Dam has reached full capacity, ensuring that water resource availability for the Integrated Vaal River System remains unaffected. Municipalities near the Liebenbergsvlei River in Free State also face no significant water shortages, with the Sol Plaatjie Dam holding stable at 82.1% this week. Mavasa commented that this capability allows for water release to support downstream users for an extended duration.

Additionally, the South African Weather Service has issued a yellow level 2 warning for severe thunderstorms projected to hit various regions, including the northern areas of the Cape and surrounding provinces. Authorities advise readiness for heavy rain and localized hazards during this period.

In summary, the Lesotho Highlands Water Project has encountered maintenance delays, leading to an extended closure of the water transfer tunnels. This situation is complicated by technical and weather-related issues, although the overall water resource availability in the region remains secure due to full dams. Stakeholders are encouraged to prepare for potential weather disturbances as announced by the South African Weather Service.

Original Source: www.citizen.co.za