Installed capacity: 2 x 20MW
Year of commissioning: 1981
Turbine manufacturer: ESCHER WYSS
Generator manufacturer: ABB (ASEA BROWN BOVERI)
Estimated cost of development: Kshs1.5 billion (1981)
Masinga is the main reservoir in the cascade, with a capacity of 1.56 billion cubic meters of water and is therefore used for water regulation throughout the year. Two vertical Kaplan turbines drive two generators capable of generating 40MW of power. The power generated at Masinga is transmitted to Kamburu and Mt. Kenya region. From Kamburu, power is transmitted to Nairobi though two 220kV lines. The reservoir occupies a surface area of 120km2.