Operations at the Three Gorges Dam, China's water conservancy project on the Yangtze River, was not affected despite Monday's quake. In the dam area, about 1,000 km from the epicentre, the quake measured about 4. The dam was designed to withstand quakes up to 7 on the Richter Scale, said a spokesman with China Three Gorges Project Corporation. The company has stepped up surveillance of the dam and dismantled some equipment at the power generating plant to minimise risks posed by aftershocks, added the spokesman. There was no damage to the dam's five-tier ship lock and 26 turbo-generators, including 22 in operation and four under installation, he said. On Tuesday, the flow into the dam and power generation were uninterrupted. The plant generated 224 billion kilowatt-hours of electricity, including 16.2 billion kilowatt-hours this year.