Rheidol power station is a 56 MW hydroelectric scheme near Aberystwyth, Wales. It was built between 1957 and 1962 and was officially opened on 3 July 1964. It has been operated by Statkraft since 2009 after it was transferred from E.ON UK as part of a swap for shares.^[1] In 1964/65 Rheidol Power Station was awarded the Christopher Hinton trophy in recognition of good housekeeping.

Rheidol Power Station
The main Rheidol power station.
Location of Rheidol Power Station in Wales
Location	Cwm Rheidol, Wales
Coordinates	52°23′46″N 3°54′00″W / 52.396°N 3.900°W / 52.396; -3.900
Construction began	1957
Opening date	1964
Construction cost	£10 million
Reservoir
Creates	Nant-y-Moch, Dinas, Cwm Rheidol
Catchment area	162 km2
Power Station
Turbines	2 × 20 MW, 1 × 13 MW, 3 × 1 MW
Installed capacity	56 MW
Annual generation	85 GWh

The power plant is the largest of its kind in England and Wales. The plant has generated renewable energy by using rainwater that falls on the surrounding mountains since 1962. The plant covers a total area of 162 square kilometres (63 sq mi) and is made up of an interconnected group of reservoirs, dams, pipelines, aqueducts, and power stations. The upper reaches of the scheme are over 750 metres (2,460 ft) above sea level in the Plynlimon mountains. A series of aqueducts collects the water and channels it into the Nant-y-Moch reservoir. Water flows from this reservoir to a power station at Dinas where it drives a 13 MW generator. From the power station, the water flows into Dinas reservoir. Dinas reservoir supplies water to the largest power station at Cwm Rheidol where there are two 20.5 MW generators. At Cwm Rheidol a further reservoir has been created to avoid large variations in the flow of water. This reservoir collects water that flows through the power station and releases it slowly through a 1 MW generator.