But this tranquility masks the power of the Yangtze, which varies from a flow of 9,000 cubic meters (315,000 cubic feet) per second to 80,000, or even 110,000 per second.

	The Three Gorges Dam is undet construction in this photo taken on March 14, 2006. [Xinhua]

The river is also capable of flooding out tens of thousands of people: 145,000 victims in 1931, 142,000 dead in 1935 and 33,000 in 1954.

This litany of disasters gave rise to the idea of taming the Yangtze quite early on, with Sun Yat-sen, the founder of the Chinese Republic, first envisaging it in 1918.

But it was not until the start of the 1990s that former premier Li Peng pushed the project through the National People's Congress despite widespread opposition from environmental groups and academics.

China had begun a period of stellar economic growth, was hungry for energy and desperately needed new resources.

The Three Gorges project was originally planned to produce nearly 83 billion kilowatt hours of electricity per year, transmitted over a radius of one thousand kilometers.

On the left bank, 14 sets of 700 megawatt turbine and generator units are already in operation. Next to them is a ship lift, which can hoist vessels of 3,000 tons.

"Ships will be able to sail up to Chongqing (600 kilometers further west) from now on instead of being stranded downstream in the dry season." Qin said.

"Economically, it was vital."

On the right bank, 12 further 700 megawatt units are still under construction and installation.

At the heart of the gorge, workers are busy around the excavations which will accommodate the turbines, each 25 meters in diameter.

About 8,000 people, spread over a wide area, are still working on the project, which at its peak employed 30,000 people.

With a capacity already equivalent to Itaipu, situated on the border of Brazil and Paraguay and currently the largest operating hydro-electric dam in the world, the Three Gorges will eventually overshadow all others.

Between now and the end of the year, a new tender process will be held for adding a new power station with a set of six more 700 megawatt generators, underground and next to that of the right bank.