Sanmen dam

…the huge dam at the Sanmen Gorge upstream of Luoyang and the reservoir impounded behind it. The project has augmented flood control on the plain and has also provided water for irrigation and hydroelectric power generation, although silt deposition in the reservoir has reduced its functional capabilities.

…decided to build a large dam 295 feet (90 metres) high across the river at Sanmen Gorge to act as a flood-control, silt-retention, and water-storage project and also to feed a hydroelectric station joined by a high-tension grid to the rapidly expanding industrial bases of Xi’an, Taiyuan, Luoyang, and Zhengzhou.…