The TAMS Hydropower Project is a major multipurpose initiative planned for the Baro-Akobo River basin in the Gambela region of southwestern Ethiopia, approximately 750 kilometers from Addis Ababa.
Envisioned as one of the largest hydropower projects in the country, TAMS is designed to have an installed capacity ranging from 1,060 MW to 2,000 MW, with a projected annual generation of around 5,760 GWh of electricity, significantly enhancing Ethiopia's renewable energy supply.
The proposed Tams Dam will be a 248m high concrete face rockfill structure with a total storage capacity of 5,868 Mm3 and a live storage of 4,807 Mm3. Eight 250MW vertical Francis turbines will be installed and operate under a head of 210m.
Developed under the ownership of Ethiopia's Ministry of Water, Irrigation and Energy, and supported by international engineering consultancies, TAMS is expected to cost more than $3 billion and will be implemented under a BOOT (Build, Own, Operate, Transfer) model. Anticipated payback period is 10.60 years.
Beyond power generation, the project aims to support regional development through improved water management and potential irrigation benefits, underscoring Ethiopia's commitment to sustainable infrastructure and energy.