China's "Impossible" Bridge Above the Clouds Just Collapsed — Engineers Are Calling It a Disaster

China's "Impossible" Bridge Above the Clouds Just Collapsed — Engineers Are Calling It a Disaster On November 11, 2025, a section of China's Hongqi Bridge in Sichuan — a highway crossing built to withstand a magnitude 8 earthquake — dropped into a Tibetan Plateau gorge just 212 days after opening, and engineers say the bridge itself was never the problem. This video breaks down how the collapse was actually triggered by the Shuangjiangkou Dam downstream, the tallest dam in the world at 312 meters, whose reservoir rose more than 160 meters in seven months and destabilized the fractured granite slope the bridge stood on through a well-understood phenomenon called reservoir-induced landslide. We trace the 24-hour warning that let authorities close the highway and prevent any casualties, the geohazard science behind pore water pressure and rock slope failure, and why this same risk now applies to China's next hydropower megaproject — the $160 billion Yarlung Tsangpo dam in Tibet, breaking ground in one of the most tectonically active canyons on Earth. If you're interested in engineering disasters, dam construction, Chinese megaprojects, and infrastructure failure analysis, this is the full investigation into what really brought down a bridge above the clouds.