Owyhee Dam A project of the Bureau of Reclamation, they hired General Construction Company from Seattle to build the dam. Former Oregonian and then United States President Herbert Hoover dedicated what was the highest dam of its type in the world on July 17, 1932. Secretary of the Interior Ray Lyman Wilbur delivered Hoover's message at the dam. Owyhee's construction served as a prototype for the larger Hoover Dam on the Colorado River, including the use of refrigeration to cool the concrete. The dam cost $6,000,000, with the total reclamation project costing $18,000,000. Owyhee was designed by Frank A. Banks, who also
Mohale Dam of the LHWP, is designed to divert about per second of storage to the Katse Dam reservoir. The water supply meets the needs of the Gauteng region which encompasses the mining and industrial cities of Johannesburg and Pretoria. The regulated flow from the reservoir is per second which is transferred as gravity flow through the interconnecting concrete lined tunnel of length with an internal diameter of . Mohale Dam is categorized as a high dam, and at in height it is said to be the highest rock-fill concrete-face dam (CFRD) in Africa. It is built as an embankment dam with