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.
Eggborough power station February 2016 it was announced that the plant would continue to operate for at least another twelve months through to March 2017. On 1 August it was announced that a further unit would be available to run commercially from mid September 2016. Units 1 & 2 will generate for National Grid under the Supplementary Balance Reserve contracts providing 775 MW Unit 4 returned to commercial operation on 16 September 2016 to generate 440 MW into the wholesale market following six months of deep maintenance. On 26 August 2016 Eggborough Power Limited (EPL) proposed to develop a new Eggborough Gas-Fired Power