BY WANDILE TSHUMA
The Zambezi River Authority says rehabilitation works at the Kariba Dam are now approximately 94 percent complete, with the massive infrastructure project remaining on course for completion by the end of 2026.
In a press statement released on Wednesday, the Authority said significant progress has been recorded under the Kariba Dam Rehabilitation Project (KDRP), a US$294 million initiative aimed at safeguarding the long-term safety and operational efficiency of the dam.
The Authority said the project’s Spillway Refurbishment component was designed to restore the reliability and functionality of the dam’s six sluice gates, which have been affected over the past six decades by concrete expansion and aging caused by alkali aggregate reaction.
According to the statement, Phase One of the spillway refurbishment works, which began in May 2019, is now 99 percent complete. The works are being carried out by GE Hydro France in partnership with Freyssinet International and include rehabilitation of upstream control systems, hydro-demolition, concrete repairs and commissioning of rehabilitated sluices. Remaining work includes commissioning of the gantry crane and site demobilisation.
Phase Two, which commenced in August 2024, is currently around 70 percent complete and is expected to finish by September this year. The Authority said the works involve the design and installation of new hoisting systems for all six sluice gates, alongside maintenance works. Installations are already underway on sluices 1, 2, 5 and 6 after all six hoisting systems were designed, manufactured and delivered to site in 2025.
The rehabilitation project also includes plunge pool reshaping works, which were completed and commissioned in September 2024, as well as institutional strengthening programmes focused on dam safety monitoring, technical capacity and governance systems.
The Authority warned that the project is critical in reducing risks associated with uncontrolled water releases that could cause downstream flooding, infrastructure destruction and loss of life. It added that the rehabilitation programme also includes the development of an Early Warning System to improve communication with downstream communities during scheduled or emergency water releases from the Kariba Reservoir.
Once completed, the project is expected to strengthen sustainable management of the reservoir and improve reliable hydropower generation for both Zimbabwe and Zambia.