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The long-term ecological effects of the Three Gorges Dam were described as ‘possibly catastrophic’.

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The plant reached its full capacity for a short duration in August 2009 due to elevated upstream water levels and river flow during floods. They produced 16,100MW of power, less than the maximum capacity of 18,300MW.

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The first (No.22) of the 12 generators became operational on 11 June 2007 and the final generator (No.15) was brought into operation on 30 October 2008.Īll 24 generators and two power generators were switched on in June 2009. The first 14 generators became fully operational in October 2006, generating 9,800MW at a water level of 156m. This completed the spiral casing of all six underground generating units. The spiral casing installation was finalised for the generating Unit 27 in May 2010. The maximum lifting height is 113m and the maximum lifting weight is 11,800t. A single way one step ship lift system was built at the project complex. In the final phase, the dam was raised to a maximum height of 185m and an additional 12 turbines were installed on the northern bank of the Yangtze River. A 135m-high permanent ship lock with 14 turbines was built on the southern bank.

In the second phase, 12,700MW units were added on the opposite bank, increasing the total to 18,200MW.ĭuring the second phase, the dam was built to a height of 87m. Fourteen of 32 Francis units of 700MW each were brought online on the left bank of the river (between 20). The main equipment orders for the 9,800MW first phase were placed in 1997. Up to the end of 1996, approximately $2.3bn was invested. The plant took 17 years to construct and was built in stages by state-backed sponsor China Yangtze Three Gorges Dam Project Development Corporation. The other two are power generators with a capacity of 50MW each. The project has 34 generators, which includes 32 main generators. The length of the dam is 2,309.5m and the storage level is 175m. The powerhouse and non-overflow section are stationed at both ends of the dam. The project consists of a concrete gravity dam with a spillway in the middle. The grids and their planned shares of offtake are Central China Power Network (55%), East China Power Network (39%) and Sichuan Provincial Grid (6%). Related transmission and distribution installations are linked to the three regional grids taking power from the Three Gorges Dam, forming a single system from the coast to the border of Tibet.

The plant is in the centre of a broad plan for central China’s electricity industry. Its capacity is 39.3 billion cubic metres.

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This point is at the end of a series of steep canyons that form a 630km reservoir, with an average width of 1.3km. The dam is located 44km from the city of Yichang in Hubei province. Improved navigability on the river allows larger ships to sail from Shanghai to as far as Chongqing upstream from the dam and 2,000km from the sea to aid China’s burgeoning domestic and export trade. Disastrous floods have claimed hundreds of thousands of lives this century alone.