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| Sanxiadu Dam | |
|---|---|
| Name | Sanxiadu Dam |
| Country | China |
| Location | Wushan County, Chongqing |
| Status | Operational |
| Construction began | 2006 |
| Opening | 2012 |
| Owner | China Three Gorges Corporation |
| Dam type | Concrete gravity |
| Dam height | 150 m |
| Plant capacity | 1,200 MW |
Sanxiadu Dam Sanxiadu Dam is a large concrete gravity dam on the Yangtze River tributary in Wushan County, Chongqing, China. It was developed as part of a cascade of hydropower and navigation projects associated with the Three Gorges Project, the Gezhouba Dam, and regional development schemes promoted by the State Council of the People's Republic of China and implemented by the China Three Gorges Corporation. The project links to national infrastructure initiatives including the West–East Gas Pipeline and provincial plans formulated by the Chongqing Municipal People's Congress.
The dam is sited in the Three Gorges region near the intersection of historic transportation corridors such as the Yangtze River shipping lane and the Sichuan Basin outlet. The location selection considered precedents like the Three Gorges Dam and Gezhouba Dam and involved stakeholders such as the Ministry of Water Resources (China), the National Development and Reform Commission, and local administrations including the Wushan County Government. Geological surveys referenced formations mapped by the Chinese Academy of Sciences and engineering assessments coordinated with the China Institute of Water Resources and Hydropower Research.
Design work was undertaken by firms with portfolios including the Three Gorges Corporation and the China Hydropower Engineering Consulting Group. The concrete gravity structure integrates spillways and sluices inspired by precedents at Xiluodu Dam and Xi'an Hydraulic Research Institute-consulted designs. Construction contracts were awarded to conglomerates such as the China Gezhouba Group Corporation and the China Power Construction Group, using techniques refined during the South–North Water Transfer Project buildup. Key milestones included cofferdam completion, diversion tunnel boring, and reservoir impoundment coordinated with the Yangtze River Commission.
The reservoir impounds tributary flows regulated within the Yangtze River basin and interacts with upstream projects like Baidicheng Reservoir operations. Hydrological modeling referenced datasets maintained by the Ministry of Ecology and Environment (China) and the Hydrological Bureau of Chongqing. The impoundment altered flow regimes affecting annual flood control metrics used in regional plans by the National Flood Control and Drought Relief Headquarters. Sedimentation dynamics were assessed using methods developed in studies on the Yellow River and applied by the Chinese Academy of Sciences' Institute of Geographic Sciences and Natural Resources Research.
The powerplant hosts Kaplan and Francis turbines supplied by manufacturers with histories linked to projects at Gezhouba and Xiluodu, including state-owned enterprises like Dongfang Electric Corporation and Harbin Electric Corporation. The installed capacity supports grid integration coordinated by the State Grid Corporation of China and feeds into transmission corridors connected with the China Southern Power Grid planning. Auxiliary systems were procured from companies experienced on Three Gorges ancillary projects and adhere to standards from the China Electricity Council.
Environmental impact assessments were prepared in line with regulations from the Ministry of Ecology and Environment (China), referencing biodiversity inventories compiled by the Chinese Academy of Sciences and conservation priorities aligned with protected areas such as nearby provincial reserves. Resettlement programs followed frameworks used in the Three Gorges relocation and involved coordination with the Ministry of Civil Affairs (China) and local committees. Cultural heritage surveys consulted the China Cultural Relics Bureau and local museums documenting relics from the Three Kingdoms and Han dynasty periods in the Three Gorges corridor.
Operational control is exercised by subsidiaries of the China Three Gorges Corporation and regional operators coordinated with the Yangtze River Water Resources Commission. Maintenance protocols draw on practices from the International Commission on Large Dams guidelines adapted by the China Society for Hydropower Engineering. Scheduling for peak load dispatch coordinates with the State Grid Corporation of China and aligns with national targets set by the National Energy Administration.
Safety monitoring uses instrumentation and surveillance approaches that evolved after incidents at major projects including lessons from Three Gorges Dam flood operations and groundwater monitoring programs guided by the Ministry of Water Resources (China). Emergency response plans integrate local emergency bureaus such as the Chongqing Fire and Rescue Department and national contingency mechanisms overseen by the National Disaster Reduction Center of China. Periodic inspections involve agencies like the China Dam Safety Association.
Planned upgrades consider turbine retrofit programs influenced by modernization efforts at Gezhouba and research at the China Electric Power Research Institute. Proposals include enhanced sediment management informed by studies from the Yellow River Conservancy Commission and ecological mitigation projects in partnership with the World Wildlife Fund China program and academic partners at Tsinghua University and Peking University. Integration with broader initiatives such as the Belt and Road Initiative logistics improvements and regional renewable energy balancing strategies of the National Energy Administration remain under review.
Category:Dams in China Category:Hydroelectric power stations in Chongqing