Location of Maoergai Dam in China
|Location||Mao County, Ngawa Prefecture, Sichuan|
|Dam and spillways|
|Type of dam||Embankment, rock-fill|
|Height||147 m (482 ft)|
|Elevation at crest||2,138 m (7,014 ft)|
|Width (crest)||12 m (39 ft)|
|Total capacity||535,000,000 m3 (434,000 acre·ft)|
|Name||Maoergai Hydropower Station|
|Hydraulic head||168 m (551 ft)|
|Turbines||3 x 140 MW Francis-type|
|Installed capacity||420 MW|
The Maoergai Dam is a rock-filled embankment dam on the Heishui River in Mao County of Sichuan Province, China. The primary purpose of the dam is hydroelectric power production and it supports a 420 MW power station. Preliminary construction (roads, bridges and foundation) for the dam began in 2006 while construction on the dam and power station commenced in 2008. The generators were commissioned in 2011. To produce power, water from the reservoir is diverted to a power station downstream through a 16.15 km (10.04 mi) long headrace tunnel and penstock. The difference in elevation between the reservoir and power station affords a hydraulic head (water drop) of 168 m (551 ft). The dam sits just below the headwaters of the Heishui and water discharged through its power station regulates the flow of water for smaller power stations downstream.
- "Maoergai Hydropower first generating unit (毛尔盖水电站首台机组发电)" (in Chinese). Jiuzhaigou. 28 October 2011. Archived from the original on 12 May 2012. Retrieved 2 July 2014.
- "Scheme of water diversion system Maoergai hydropower charge" (in Chinese). Sichuan Hydropower. 2013. Retrieved 2 July 2014.
- "Maoergai Dam hydropower station 2138m elevation Adit II grout curtain grouting construction tenders" (in Chinese). State Bidding Corp. 8 January 2013. Retrieved 2 July 2014.