On 17 August 2009, a turbine at the hydroelectric power station of the Sayano-Shushenskaya Dam near Sayanogorsk in Russia failed catastrophically, flooding the turbine hall and killing 75 people. A section of the roof of the turbine hall collapsed; all but one of the ten turbines were damaged or destroyed. The entire plant output, totalling 6,400 megawatts (MW) – a significant portion of the supply to the local area – was lost, leading to widespread power outages. An official report on the accident was released in October 2009.