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
Tsukabaru Dam Tsukabaru Dam Tsukabaru Dam () is a concrete gravity dam built on the Mimi River for hydro electric power generation in the Miyazaki Prefecture in Japan. The dam, built by the Kyushu Electric Power Co, Ltd. in 1938, was commissioned only in 1993. When built to a height of it was the highest gravity type dam in Japan, only to be surpassed later by the Kamishiba Dam raised in the uppermost reaches of the Mimi River. The dam is located on the Mimi River which rises in the Kyushu mountain range. The river flows through a gorge section. The catchment