Nanjing
A dual circuit, 500 kV AC overhead powerline crosses the Yangtze River at Nanjing, Jiangsu Province, China, built in 1992. It uses two 257 m (843 ft) tall pylons built of reinforced concrete, which may be the tallest pylons built out of concrete in the world. They are situated at 31°57′46″N 118°36′58″E / 31.96278°N 118.61611°E / 31.96278; 118.61611 and at 31°57′11″N 118°38′4″E / 31.95306°N 118.63444°E / 31.95306; 118.63444 and carry 6 conductors in two levels. The span width is 2,053 m (6,736 ft).
Read more about this topic: Yangtze River Power Line Crossings