Andekaleka Dam  The Andekaleka Dam is a gravity dam on the Vohitra River near Andekaleka in eastern Madagascar. The primary purpose of the dam is hydroelectric power generation and it diverts water from the Vohitra east into a headrace tunnel where it reaches a underground power station. After water charges the turbine-generators, it travels down a tailrace tunnel before it reenters the Vohitra River. The drop in elevation between the dam and power station affords a hydraulic head of . The dam and power station were funded by the World Bank at a cost of US$142.1 million. It was constructed between 1978 and 1982. The power station can house up to four generators. The first two were operational in 1982 and a third in 2012.. Generator one and two host Vevey and Jeumont turbines while the third is made by HEC  . They all use Francis reaction turbines  which typically range from 10 to 700MW  and with water head operating from 10 to 600 meters