Question: the power dam that forms the largest man-made lake in south america is on what river?
Answer: The Itaipu dam and the hydroelectric plant are on the Paraná River. The construction of the dam began in February 1971 and cost $19.6bn. The first unit began generating power in May 1984 and the second generating unit started operating the same year. Itaipu has 20 generating units, each with a capacity of 700MW.