Yangtze River Crossing
The Yangtze River power line crossings are overhead power lines that cross the Yangtze River in China. There are at least three power line crossings on the Yangtze River at Jiangyin, Nanjing, and Wuhu. The towers of the crossing in Jiangyin are among the highest in the world.
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 and at 31°57′4″N 120°2′53″E / 31.95111°N 120.04806°E. It is a section of the 500 kV 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 suspension towers, 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.
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