Three Gorges

Short answer: The Three Gorges Dam crosses the Yangtze at Sandouping, near Yichang in Hubei province, China. By installed capacity it's the world's largest power station: 22,500 MW from 32 main 700 MW generators plus two 50 MW units that power the plant itself.

The concrete gravity dam is about 2.3 km long, 2,309.5 m along its axis or 2,335 m by another measure. Its maximum height is 181 m, and its crest sits at 185 m above sea level, which is where the Reel's '185 m' comes from. The reservoir normally holds water at 175 m. Construction formally began in December 1994. The dam body was finished in 2006, and Guinness dates the last main generator to July 4, 2012. The whole project wasn't certified complete until 2020, after the ship lift and other works. Output depends on river flow. The design target is 88.2 TWh a year, and in 2020 it set a world record of 111.8 TWh for a single hydropower plant. Besides power, the project is meant for flood control and navigation, through a five-step double ship lock and a ship lift that raises vessels up to 113 m. According to Reuters, about 1.3 million people were relocated to make way for the reservoir.

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