CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins85% CONFIDENCEOverall confidence: 85%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or betterWikipedia[2] and Voith[3] (the turbine supplier) both say Itaipu[1] began operation on 5 May 1984, when the first generating unit started running; Encyclopedia.com and the Itaipu tourism site confirm 1984 as the start of operation.
The first generating unit of Itaipu Binacional on the Paraná River was synchronised on 5 May 1984, starting the plant that grew into one of the world's largest hydropower stations.
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