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
Bemposta Dam is 59 m, the maximum 71 m. Maximum flow per turbine is 152 m³/s. In January 2008 construction began on the Bemposta II power plant. In December 2011 work on an additional underground powerhouse was completed and a further Francis turbine with a 191 MW capacity went online. Its average annual generation is 134 GWh. Bemposta Dam Bemposta Dam () is a concrete arch dam on the Douro, where the river forms the national border line between Spain and Portugal. It is located in the municipality Mogadouro, in Bragança District, Portugal. Construction of the dam began in 1957. The dam