Mainstream Energy Solutions Limited specialises in hydroelectric power generation. The company is the concession of the Kainji Hydro Electric Company, comprising the Kainji hydroelectric plant, with a total installed capacity of 760 MW, and the Jebba hydroelectric plant, with an installed capacity of 578.4 MW. Cascading along the course of the Niger River in Nigeria, the Jebba plant is located 100 km downstream of the Kainji plant. The power plants have a combined installed capacity of 1338.4 MW

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Brief overview of the Kainji and Jebba plants

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Kainji

Located on the Niger River at Kainji Gorge, New Bussa, the Kainji hydroelectric power station is the oldest hydropower plant in Nigeria, with turbine generating units aged between 33 and 43 years. The original development plan for the Kainji plant provided for twelve units of 80 MW each, with a projected total installed capacity of 960 MW.

However, at completion of the project in 1978, the total installed capacity was 760 MW with eight units, leaving four number open pits with no generating units installed.

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Jebba

The Jebba hydroelectric plant is situated 100 km downstream of the Kainji dam on the River Niger. The plant was officially commissioned on 13 April 1985, although commercial operation started in 1983. It has six fixed-blade propeller hydraulic turbines with a total installed capacity of 578.4 MW, i.e. 96.4 MW each.