Eskom Uganda announced on September 10 that the main dam at Nalubaale had been refurbished.
Sinohydro Corporation spent Shs11.6 billion repairing the dam’s damaged and broken surfaces in order to stop leaks.
The main dam refurbishment project was undertaken to increase the structural and functional integrity of the dam by reducing water ingress, which would aggravate the effects of aggregate silica reaction, a concrete cancer that affects hydro civil structures, according to Thozama Gangi, the managing director of Eskom Uganda, who officiated at the project handover.
We have made greater headway toward curing the cracking that would have harmed the power station by completing a successful project.
“I want to express my gratitude to the project team for their outstanding work on COVID-19 and movement restrictions,” Gangi remarked.
The Nalubaale main dam, which serves as the foundation and backbone of all hydropower operations at the Owen Falls Complex, is a concrete gravity dam with a flood sluiceway to regulate river flow and a concrete intake dam, which houses ten 18MW generating units.
The dam that controls Lake Victoria, the world’s third biggest freshwater lake, is around 750 meters long and reaches a maximum height of 30 meters, with a road bridge spanning it.
Over the years, leakage from cracks, joints, and other components of the concrete dam has increased, posing operational and dam safety concerns.
Despite the fact that grouting work was done in 1999 to stop some leaks, readings, seepage observations, and inspection reports indicated that the previously grouted curtain had deteriorated, posing a threat to the 67-year dam’s functional and structural integrity, necessitating further refurbishment.
According to Gangi, the business has invested Shs150 billion (USD 42 million) on both the Nalubaale and Kiira power stations so far, with plans to invest another Shs87 billion (USD 23.7 million) by March 2023.