The Ertan Dam () is an arch dam on the Yalong River, a tributary of the Yangtze River in Sichuan Province, in southwest China.
The dam has six hydroelectric generators, each with a generating capacity of 550 MW. The total generating capacity of the facility is 3,300 MW, one of the largest hydroelectric stations in China. The annual production is 17 TWh, and until December 5, 2006, it has produced over 100 TWh of electricity. Construction of the dam started in September 1991 and was completed on December 26, 1999.Ertan Hydroelectric Dam A total of of material was excavated during construction.
The Ertan Dam was designed by the China Hydropower Engineering Consulting Group Survey and Design Institute in Chengdu, and was constructed and is currently operated by Ertan Hydropower Development Company Limited, the owners of the dam. The company is invested by State Development and Investment Company (52% share) and Sichuan Chuantou Energy Limited (48% share).
Design The Ertan Dam is a high and long double-curvature arch dam. The dam withholds a normal reservoir of with a drainage area of and normal surface area of . The dam has four different ways to discharge water downstream. First, the dam's spillways which contain seven floodgates at the crest and two flood tunnels can discharge and respectively. The dam also contains 6 x middle outlets and four bottom outlets that can discharge and respectively. The dam's power station is located underground along with its transformer room which is in a separate cavern. Additionally, the power station is supported by an underground surge chamber as well.
Main Features
Source: +Project LocationOn the Yalong River, Sichuan province,
P. R. ChinaProject PurposeHydroelectric Power GenerationYears of Construction1987-1999Construction of Main DamTypeDouble-curvature Arch DamHeight240 mCrest Length774.69 mConstruction of Power plantMaximum gross head189 mInstalled Capacity6×550 MW (Francis)Power Conduits6 steel embedded in concrete I.D.=9.0 mCatchment and ReservoirCatchment Area116,400 km2Mean Annual Runoff1,670 m3/sReservoir Area at FSL101 km2Storage at FSL5,800 million m3Active Storage3,370 million m3Discharge CapacityCrest Outlet7 / 6,260 m3/s Mid Level Outlet6 / 6,930 m3/s Bottom Outlet4 / 2,084 m3/s Flood Discharging2 / 7,400 m3/s Project DevelopersOwnerErtan Hydropower Development
Company, Ltd.DesignerCHIDI,
now POWERCHINA Chengdu ContractorEJV, SGEJV, GYBDMain Equipment SuppliersTurbinesGE Canada, Dongfang Electrical
Machinery Co, Ltd., Harbin Electric
Machinery Co, Ltd.Generators & HV
ElectricalGE Canada, Dongfang Electrical
Machinery Co, Ltd., Harbin Electric
Machinery Co, Ltd.Gates &
HydromechanicalJiajiang Hydraulic Machinery Works,
China Gezhouba (Group) Corporation,
Sinohydro Bureau No.8,
See also
List of conventional hydroelectric power stations List of power stations in China
References