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
Alto Rabagão Dam Alto Rabagão Dam Alto Rabagão Dam () is a concrete dam on the Rabagão River, a left tributary of the Cávado River. It is located in Peneda-Gerês National Park, in the municipality Montalegre, in Vila Real District, Portugal. Construction of the dam began in 1957. The dam was completed in 1964. It is owned by "Companhia Portuguesa de Produção de Electricidade" (CPPE). The dam is used for power production. Alto Rabagão Dam is a 94 m tall (height above foundation) and 1,970 m long concrete dam, which is composed of a arch dam in the center and gravity dams on