The Engineering Marvel That China Hopes Will Help Wean It Off Foreign Energy

China has begun construction of a $167 billion hydropower facility on Tibet's Yarlung Tsangpo River that would generate triple the output of the Three Gorges Dam. The project employs a run-of-the-river design, drilling deep tunnels through mountains to bypass the Yarlung Tsangpo Grand Canyon, where the river drops nearly two vertical miles over 300 miles. Water diverted through the tunnels will drive turbines at both ends without creating a large reservoir. The river currently produces just 2% of its hydropower potential. A $7 billion transmission network will deliver electricity to Guangdong province, Hong Kong, and Macau. China imported nearly a quarter of its energy supply in 2023.

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