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
Bouçã Dam at the right side of the dam. The turbine rotation is 214.3 rpm. The minimum hydraulic head is 52.5 m, the maximum 56.5 m. Maximum flow per turbine is 50 m³/s. Bouçã Dam Bouçã Dam () is a concrete double curvature arch dam on the Zêzere River, where the river forms the border line between the districts of Castelo Branco and Leiria. It is located in the municipality Pedrógão Grande, in Leiria District, Portugal. The dam was completed in 1955. It is owned by "Companhia Portuguesa de Produção de Electricidade" (CPPE). Bouçã Dam is a 63 m tall (height above