en.Wedoany.com Reported - The core wall fill elevation of the Shuangjiangkou Hydropower Station dam has reached 2,455 meters, with a total fill height exceeding 260 meters. On May 29, the project completed the 2026 "once-in-a-millennium" flood control and safety construction target.
This hydropower station is a major national clean energy project, with a total installed capacity of 2,000 MW and an average annual power generation of 7.7 billion kWh. The river-damming dam adopts a gravel soil core rockfill dam, with a maximum dam height of 315 meters and a total fill volume exceeding 46 million cubic meters, making it the world's tallest dam among those already built or under construction. As the leading station and regulating reservoir of the Dadu River Basin, it will have a total storage capacity of 2.9 billion cubic meters upon completion, increasing the dry-season output of downstream cascade power stations by 1,760 MW and annual dry-season power generation by 6.6 billion kWh. This is of great significance for improving flood control standards for basin cities and towns, optimizing the power source structure of Sichuan's power system, and serving the construction of the Chengdu-Chongqing Economic Circle.
To ensure the timely achievement of flood control goals, the project department coordinated the formulation of construction plans for the flood season, dynamically optimized process connections and resource allocation, and overcame adverse factors such as high-altitude variable weather and complex terrain. During construction, a smart compaction monitoring system was used to achieve digital control over the entire dam fill process, precisely controlling compaction parameters to ensure that dam compaction quality meets standards and is controllable. The construction strictly implemented the "three-inspection system" and refined management requirements, rigorously controlling process quality and safety throughout the entire process, completing the dam fill construction to high standards, and successfully meeting the annual flood control safety standards.
The completion of this milestone has created favorable conditions for flood season safety and subsequent water storage. All construction personnel will continue to advance the project's timely commissioning, serving the national energy strategy and regional development.
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