The funding, approved on May 22, is aimed at ensuring the project is completed to full design specifications and delivers its intended economic and social benefits. Construction of the dam is already about 90% complete, with the new financing focused on final technical refinements and long-term sustainability.
The package includes about $70 million (€64.20 million) from the AfDB and roughly $4.6 million (€4.2 million) from the African Development Fund, alongside $16 million (€15 million) in counterpart funding from the Government of Kenya. This builds on earlier financing of $96.22 million approved in 2013.
The Thwake project is designed to improve water security in the semi-arid counties of Kitui and Makueni. Once completed, it is expected to supply up to 150 000 cubic metres of water daily to around 1.3 million people, support irrigation across 40 000 hectares, and generate 20 megawatts of renewable hydropower.
The additional financing will fund key upgrades, including raising the dam wall, strengthening foundations and constructing two supplementary saddle dams to improve safety and long-term reliability.
AfDB Director General for East Africa Alex Mubiru said the investment is focused on ensuring the project achieves its full impact.
“This financing is about completing a strategic national asset and ensuring it delivers fully on its promise,” Mubiru said.
“With the project already at an advanced stage, our focus is on safeguarding the integrity of the investment… and ensuring that communities realise the full benefits in water security, food production, and clean energy,” Mubiru added.
Beyond infrastructure, the project is expected to reduce flood risks, improve sanitation and support livelihoods in the Athi River catchment. Construction has already created jobs, including opportunities for youth and women, while also supporting local schools, healthcare and water services.
Once completed, the Thwake dam is expected to boost Kenya’s water reserves, enhance agricultural productivity and expand access to renewable energy.
The project is scheduled for completion in September 2028.
–AfDB/ChannelAfrica–
