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
Silin Dam operational by December 2009. Silin Dam The Silin Dam () is a concrete gravity dam on the Wu River in Sinan County, Guizhou Province, China. The dam has an associated hydroelectric power plant with a 1,080 MW capacity utilizing 4 x 270 MW Francis turbine-generators. The dam is long, high and composed of roller-compacted concrete. Its reservoir has a capacity, of which is flood storage. The dam also supports ship lift. Construction on the dam began in October 2004, the dam began to impound the river in March 2008 and by May 2009, the power plant's first generator was operational.