Jiangyin
One exists at Jiangyin, Jiangsu Province, China. Each pylon is situated at 31°58′17″N 120°3′12″E / 31.97139°N 120.05333°E / 31.97139; 120.05333 and at 31°57′4″N 120°2′53″E / 31.95111°N 120.04806°E / 31.95111; 120.04806. It is a section of the 500kV-power line from the Yancheng power station to the Dou Shan substation in the province of Jiangsu. The power line section running over the river has a span width of 2,303 m (7,556 ft). It is carried by two 346.5 m (1,137 ft) tall tangent electricity pylons, each weighing 4,192 tonnes, and both are among the tallest electricity pylons in the world (for comparison, the towers even surpass the height of the Eiffel Tower, which is 324 m (1,063 ft), including antenna). They are identical lattice towers of square cross section with an area of 68 m (223 ft) × 68 m at the base and 8 m (26 ft) × 8 m at the top. The pylons carry four conductors on the lower crossarm, 312 m (1,024 ft) above ground, with a length of 77 m (253 ft) and two conductors on the upper crossarm. The insulator strings are 10 m (33 ft) long. These pylons are both equipped with an elevator which runs in a cylindrical tube in its center. A spiral staircase circles the elevator shaft outside.
On each side of the river are each main span pylon, followed by two anchor towers; one for each circuit. The anchor pylons are each 55 m (180 ft) tall, weigh 110 tonnes and stand on an area of 16 m × 24 m (52 ft × 79 ft).
Construction of the pylons started on November 8 2002. They were completed on April 13 2004. On November 18 2004, the power line went into service.
Read more about this topic: Yangtze River Power Line Crossings