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
Aslandağ Dam Aslandağ Dam The Aslandağ Dam is a gravity dam on the Bembo River (an eventual tributary of the Great Zab) in Şemdinli district of Hakkâri Province, southeast Turkey. Under contract from Turkey's State Hydraulic Works, Özdoğan Group began construction on the dam in 2008 and it was complete in 2012. In July 2012 suspected Kurdistan Workers' Party (PKK) militants set fire to equipment at the construction sites of the Aslandağ Dam and also the Beyyurdu Dam which is located downstream. The reported purpose of the dam is water storage and it can also support a hydroelectric power station in the