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
Drax, North Yorkshire no value, as it had been flooded by the Ouse, and the borough was not even mentioned, leading George Sheeran to claim that flooding may have led to the abandonment of the town, or at least the end of its borough status. However, the inquisition post mortem for Richard Lely of Drax, held in 1422, indicates that his part of the land was not completely worthless, although the mill was ruined. His son John inherited and the property then passed to John's daughter Joan, who had been born and baptised at Drax in 1424. She was married to John Babthorpe