双江口水电站位于四川省阿坝藏族羌族自治州马尔康市和金川县交界处，是大渡河干流规划28级梯级电站的上游控制性水库工程，也是国家西部大开发重点工程和“南水北调”西线工程主要取水点之一。

电站总装机容量200万千瓦，以发电为主，兼顾防洪，总库容29亿立方米。由中国电建所属成都院规划论证和全阶段勘测设计，西北院监理，水电七局承担大坝建设任务，水电一局、水电五局、水电基础局参与工程建设。

大坝采用砾石土心墙堆石坝，拥有315米的世界在建最大坝高和4500万立方米的总填筑方量，集“超高心墙堆石坝、超大填筑方量、高地应力、高水头、高边坡、高寒和深基坑”等特点于一体。

Shuangjiangkou Hydropower Station is located at the junction of Malkang City and Jinchuan County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province. It is the upstream control reservoir project of the 28-stage cascade power station planned for the main stream of Dadu River, and it is also one of the main water intake points of the national Western development key project and the western route of the South-to-North Water Diversion project.

The power station has a total installed capacity of 2 million kilowatts, mainly for power generation, taking into account flood control, and a total storage capacity of 2.9 billion cubic meters. The Chengdu Institute of Power Construction of China is responsible for the planning and the whole stage of investigation and design, and the Northwest Institute is supervised. Hydropower Bureau 7 undertakes the task of dam construction, and Hydropower Bureau 1, Hydropower Bureau 5 and Hydropower Infrastructure Bureau participate in the project construction.

The dam adopts gravel core rockfill dam, which has the highest dam height under construction in the world of 315 meters and the total fill square volume of 45 million cubic meters, and integrates the characteristics of "ultra-high core rockfill dam, ultra-large fill square volume, high ground stress, high head, high slope, high cold and deep foundation pit".