The first power station on the site was built in 1921 by the Sheffield Corporation, to support the steel industry in the Lower Don Valley. The station originally comprised three 6 MW and one 10 MW steam turbines. The station was expanded in the 1930s. Hyperboloid cooling towers 6 and 7 were constructed between 1937 and 1938, replacing earlier square cooling towers. They were designed by LG Mouchell and Partners. The cooling towers had a total capacity of 10,500,000 gallons per hour.
