The Engineer Souza Dias Dam, formerly known as the Jupiá Dam, is an embankment dam on the Paraná River near Três Lagoas in Mato Grosso do Sul, Brazil. It was constructed for hydroelectric power production, flood control and navigation. Studies on the dam and power plant began in 1951 which recommended the dam along with the Ilha Solteira Dam. The dam was inaugurated in 1968 and its generators were commissioned between 1969 and 1974.

The Paraná River (Portuguese: Rio Paraná ; is a river in south-central South America, running through Brazil, Paraguay, and Argentina for some 4,880 kilometres. Among South American rivers, it is second in length only to the Amazon River. It merges with the Paraguay River and then farther downstream with the Uruguay River to form the Río de la Plata and empties into the Atlantic Ocean.