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
Kirirom 1 Hydropower Dam Chinese State Owned Enterprise, China Electric Power Technology Import & Export Corporation (CETIC), was contracted to re-build the project at a cost of US$24 million under a 30-year build-operate-transfer (BOT) agreement. The Council for Development of Cambodia approved the project on 29 December 2000 and in May 2002 the project re-commenced operation, providing electricity to Kampong Speu Province and Phnom Penh. The project is managed by Electricity du Cambodge and is linked to Phnom Penh by a 120 km long, 115kV transmission line Kirirom 1 Hydropower Dam The Kirirom 1 Dam is an embankment dam located in the Kirirom National