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 process takes about 5 hours and a success rate of 99% removal of the algae is reported, killing all cells over an initial treatment of two days. Unlike other methods of treatment, no chemical contamination is produced in the UV radiation process. 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,