between 1946 and 1961. It is now operated by SSE Renewables.

The scheme contains six power stations at Achanalt, Grudie Bridge, Mossford, Luichart, Orrin, and Torr Achilty. They have a total capacity of 107.2 MW and an annual output of around 470 GWh (or million units per year). Water is impounded in eight reservoirs by nine large dams. There is also a complex series of nine tunnels and many aqueducts to divert the water to the power stations, some coming from other river basin catchments.