China's Yangtze Electric Power Co. Ltd., operator of the Three Gorges hydroelectric dam, said it had generated 7.22 percent less electricity in the first three quarters versus a year earlier.

Yangtze Power produced 26.79 million megawatt-hours (MWh) in the January-September period, it said in a statement.

The company, China's most valuable power firm, shares Three Gorges output with its state-owned parent, China Three Gorges Project Corp. The plant is the world's largest hydropower project.