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From Wikipedia, the free encyclopedia

Ahai Dam
Location of Ahai Dam in China
LocationYulong County, Lijiang, Yunnan
Coordinates27°21′02″N 100°30′23″E / 27.35056°N 100.50639°E / 27.35056; 100.50639
Construction began2008
Opening date2012
Construction cost13.6 billion RMB ($2 billion USD)
Dam and spillways
Type of damGravity
ImpoundsJinsha River
Height138 m (453 ft)
CreatesAhai Reservoir
Total capacity8,820,000,000 m3 (7,150,000 acre⋅ft)
Surface area23.42 km2 (9.04 sq mi)
Power Station
Commission date2012-2014
Turbines5 x 400 MW Francis-type
Installed capacity2,000 MW
Annual generation8.887 billion kWh (est.)

The Ahai Dam (阿海水电站) is a gravity dam on the Jinsha River in Yulong County, Lijiang Prefecture, Yunnan and in the river reach at about 5 km in the lower reaches of Cuiyu River mouth. Preliminary construction began in 2008 and construction on the dam superstructure and power station began in 2010. The dams first generator was operational in December 2012, the third by May 2013.[1][2] The fifth and final generator was commissioned on 9 June 2014.[3]


The dam section is a transverse valley with a water surface 60 to 150 m wide and low water level of 1048 m. The landforms on both banks are basically symmetrical. There is a measurement of about 50 m wide tableland and about 30 degrees above water surface in the left bank, and the slope in the right bank is about 27 degree and the slope above the elevation of 1500 m is about 48 degree. There is poor sand and soil materials and abundant limestone material satisfied with requirement of quality and reserves within 20 km in the dam area, which is qualified for setting up low dam according to existing geological data. In the light of topographic and geological conditions, the Ahai Dam section can be considered as local material dam type with low height of swell, suitable for connection of backwater with Liyuan cascade. The dam has normal water level of 1514 m, total reservoir capacity of 1.08 billion cubic meters and installed capacity of 2,000,000-2,200,000 kW. Now, a low-cost road to Niukexu has been opened to traffic, and there is only an about 5 km long path to the dam section.[4]

Environmental impact

This project marked the first time representatives from Chinese environmental groups were invited to participate in the environmental impact assessment for a major hydropower project in China[citation needed], according to the First Financial Daily. Representatives of the Institute for Public & Environmental Affairs and the Green Earth Volunteers took part in the meeting to conduct technical evaluation on environmental impact assessment for the dam on the Jinsha River on December 29–30, 2008 in Beijing.[citation needed]

See also


  1. ^ "Ahai Station Unit 1 through 72 hours test run (info)" (in Chinese). China Energy Report. 24 December 2012. Archived from the original on 7 April 2014. Retrieved 24 June 2013.
  2. ^ "Huadian Power Station 3 # Unit Ahai enter 72 hours test run" (in Chinese). Polaris Power News. 14 May 2013. Retrieved 24 June 2013.
  3. ^ "Jinsha River Basin Hydropower 5 Ahai all production units" (in Chinese). Yunnan Network. 9 June 2014. Retrieved 21 July 2014.
  4. ^ Archived July 16, 2007, at the Wayback Machine
This page was last edited on 2 April 2021, at 21:17
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