Koysha Hydroelectric Project

Hydropower Plants

Start of works

March 2016

Progress status


Data updated to April 2021

Omo River, Ethiopia
SDG Obiettivi di sviluppo sostenibile
Affordable and Clean energy Affordable and Clean energy
Climate action Climate action

The new Koysha hydroelectric project, located in the southwest of the country, will be the fourth of a cascade of dams along the Omo River, after the Gilgel Gibe I, Gilgel Gibe II and the Gibe III hydroelectric projects.

The Koysha plant will have an installed capacity of 2,160 MW for an annual production of 6,460 GWh.

The project, commissioned by Ethiopian Electric Power (EEP), includes: an RCC gravity dam, 170m high, with a crest length of 1000 m with a 9 billion cubic metre capacity reservoir within the dam body leading to an outdoor power station housing 8 x 270 MW Francis Turbines, a concrete spillway on the left side of the valley, and two culverts to divert the river flow during the dam’s construction on the right side. Other permanent works include: a bridge over the Omo River, and camps including facilities for the client. The project also includes the access roads, a new bridge over the river, and a 400 KW transmission line from Koysha to Gibe III.

Once completed, the project will lead to an annual reduction of 367,790 tons in CO2 emissions.

This important new project, together with GIBE III and GERD (the Grand Ethiopian Renaissance Dam) on the Blue Nile, will enable Ethiopia to become Africa’s leader in terms of energy production.

Technical data

Reservoir volume (m3)


Excavation (m3)


Concrete RCC (m3)