Megawatt Valley was due to the presence of Ferrybridge C (1966–2016), Eggborough (1967–) and Drax (1974–) coal-fired power stations. This is one of the few remaining concentrations of British coal-fired generation, the power stations are located close to historic coal-mining sites on the South Yorkshire Coalfield and to the River Aire. Drax is a large power station capable of generating 7% of UK electricity demand and, despite being the UK's cleanest and most-efficient coal-fired power station is Europe’s biggest single source of carbon dioxide emissions. The term Megawatt Valley, in relation to the Yorkshire power stations, has been mentioned ("What ever happened
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