Course of the Colorado River into the Virgin River, which ran southward through what is now Overton Arm to join the Colorado River near the now-ghost town of St. Thomas, Nevada. At Hoover Dam, the Colorado turns due south through Black Canyon, a direction it will follow for the remainder of its course to the Gulf of California. It passes under the Mike O'Callaghan–Pat Tillman Memorial Bridge (Hoover Dam Bypass), the highest concrete arch bridge in the world, carrying U.S. Route 93 at a height of above the Colorado River. At the end of Black Canyon the Colorado widens into Lake Mohave, created by the
Alto Rabagão Dam m³/s. The pumps are operated independently of the Francis turbines. As lower reservoir for Alto Rabagão the reservoir of Venda Nova Dam is used. 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