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
Fratel Dam 45.6 MW (50 MVA) each in a dam powerhouse. The turbine rotation is 150 rpm. The minimum hydraulic head is 17.8 m, the maximum 28.8 m. Maximum flow per turbine is 250 m³/s. Fratel Dam Fratel Dam () is a concrete gravity dam on the Tagus, where the river forms the border line between the districts of Portalegre and Castelo Branco. It is located in the municipality Nisa, in Portalegre District, Portugal. The dam was completed in 1973. It is owned by "Companhia Portuguesa de Produção de Electricidade" (CPPE). Fratel Dam is a 48 m tall (height above foundation) and