Lake Oahe Lake Oahe Lake Oahe (oh-WAH'-hee) is a large reservoir behind Oahe Dam on the Missouri River; it begins in central South Dakota and continues north into North Dakota in the United States. The lake has an area of and a maximum depth of . By volume, it is the fourth-largest reservoir in the US. Lake Oahe has a length of approximately and has a shoreline of . 51 recreation areas are located along Lake Oahe, and 1.5 million people visit the reservoir every year. The lake is named for the 1874 Oahe Indian Mission. Lake Oahe begins just north of
Dasu Dam Dasu Dam The Dasu Dam is a gravity dam currently being constructed on the Indus River near Dasu in Kohistan District, Khyber Pakhtunkhwa Province, Pakistan. The tall dam will support a 4,320 MW hydroelectric power station which will be built in two 2,160 MW stages. Water from the reservoir will be diverted to the power station located about downstream. The first stage was approved by the Executive Committee of the National Economic Council on 29 March 2014. That stage will cost an estimated US$4.278 billion. Funding is being provided by the World Bank (US$700 million), the Industrial and Commercial Bank