Muja Power Station is a power station east of Collie, Western Australia. It has eight steam turbines served by coal-fired boilers that together generate a total capacity of 854 megawatts of electricity. It is the largest power station in the South West Interconnected System, accounting for roughly 15 percent of capacity. The coal is mined in the nearby Collie Sub-basin. On 14 June 2022 the state government announced that Synergy would close Muja Power Station by 2029. The station was first commissioned on 21 April 1966. Currently four of the eight turbines are running (units 5 through to 8). Muja has four 60 megawatts units (stages A and B), two 200 megawatts units (stage C) and two 227 megawatts units (stage D). According to the National Pollutant Inventory (NPI), Muja Power Station is one of the biggest emitters of air pollution in Australia, including high emissions of beryllium, fluoride and particulate matter. Carbon Monitoring for Action estimates that, in 2009, Muja Power Station emitted of to generate of electricity. In household consumer terms, this equates to of emitted for each one kilowatt-hour (kWh), or , of electricity produced and fed into the electricity grid. That is, Muja Power Station emits slightly more per kilowatt-hour of electricity produced than nearby Collie Power Station () and much more than Bluewaters Power Station () based on estimates for the same year. Refurbishment The four smallest and least efficient units (each of 60 megawatts), stages A and B, were closed in April 2007. In June 2008 it was announced that these older generator units would be recommissioned, due to a statewide natural gas shortage. Verve Energy entered into a joint venture with engineering firm Kempe of Geelong to refurbish four mothballed generating units of Muja. In 2010, a A$150 million loan was taken by Kempe subsidiary Inalco with a guarantee from Verve Energy. 2012 explosion In 2012 during the attempted recommissioning of stages A and B, an explosion occurred in unit 3 at the refurbished A B area due to corroded piping. A man was burnt, though the station continued to operate (stage C, D) during the incident. Australian Manufacturing Workers Union state secretary Steve McCartney hailed the lack of casualties as "a miracle". The joint venture collapsed amid massive cost overruns and an explosion caused by corroded boiler tubes that were not properly inspected before the refurbishment plan was approved. Kempe ran into