River Aire east of Castleford; Ferrybridge C, Eggborough and Drax. Drax takes its cooling water from the Ouse, but both Ferrybridge and Eggborough draw their water from the Aire. Both of these plants stopped generating in 2016, with Eggborough being a stand-by for capacity problems until March 2017. A hydroelectric power station was installed on the Brotherton Weir at Knottingley in November 2017. The £7.5 million project is expected to deliver 500 kilowatts per year and be operational for 100 years. Due to the Aire flowing through the former industrial landscape of West Yorkshire, it had a reputation as being heavily polluted.
Drax power station scheduled begin in late 2010 and to take up to three and a half years. Two other 300 MW biomass plants were planned by Drax at the ports of Hull and Immingham. In 2012 Drax group abandoned plans for the discrete biomass plant development, due to changes in government subsidies for biomass energy production favouring plant conversions over newly built plants. It switched to a project to convert half of the units at its existing plant to biomass firing. In September 2012 Drax Group announced the conversion to full firing with biomass of three of its six units. The first