Upper Boat power station supplied electricity to the town of Pontypridd and the wider area from 1904 to 1972.

5. c. vi)[2] and the South Wales Electrical Power Distribution Company Act 1922 (12 & 13 Geo.

[8] There was a 132 kV substation south east of the power station that provided the electricity connection to the national grid.

[10] Soon after the commissioning of the new plant at Upper Boat power station the Electricity (Supply) Act 1926 (16-17 Geo.

This established the Central Electricity Board (CEB) with a duty to identify high efficiency ‘selected’ power stations that would supply electricity most effectively; Upper Boat was designated a selected station.

[12] From about 1937 steam from the station was used to provide process and space heating to the nearby Treforest trading estate.

Operating data for the period 1946–72 is shown in the table:[8][14][15][16] The less intensive use of the ‘low pressure’ plant between 1954 and 1958 is evident.