A 1.2 GW power station, such as Cockenzie, receives up to 3 million tons of coal a year, whereas a larger 2 GW plant, like West Burton, up to 5 million tons per year. By the end of 1966 there were about 900 wagons carrying 53,000 tons a week to four power stations. Power stations that were built to handle the new MGR traffic were Aberthaw, Drax, Didcot, Eggborough, Ferrybridge C, Fiddlers Ferry and Ratcliffe, of which the former and latter pairs are still open for traffic. Many of the older power stations were gradually converted to MGR operation.