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
Tsukabaru Dam process takes about 5 hours and a success rate of 99% removal of the algae is reported, killing all cells over an initial treatment of two days. Unlike other methods of treatment, no chemical contamination is produced in the UV radiation process. Tsukabaru Dam Tsukabaru Dam () is a concrete gravity dam built on the Mimi River for hydro electric power generation in the Miyazaki Prefecture in Japan. The dam, built by the Kyushu Electric Power Co, Ltd. in 1938, was commissioned only in 1993. When built to a height of it was the highest gravity type dam in Japan,