The Three Gorges Dam was built to tame flooding on China's Yangtze river, improve transportation of goods and produce clean energy.
The government maintains that the benefits will negate the 50 billion dollar cost, never mind the 1.4 million displaced people.
But 18 years on, the environmental costs are still mounting.
Ma Tianxin and his family were forced to move after geologists said the area behind the reservoir where his farmhouse sits, had become unsafe to live in.
Song Weixue's family may be moving for a second time.
New houses are being built as the relocation town itself is now deemed unsafe.
SOUNDBITE: 55-YEAR-OLD LOCAL RESIDENT SONG WEIXUE SAYING (Mandarin):
"We moved here in 2002, but in 2008, some geological experts found in their studies that there are high risks of landslides in Huangtupo and in areas around the reservoir, so they want us to move again. But so far, the government hasn't made any arrangements for our housing."
Hydropower construction has slowed since 2006, due to soaring costs of handling displaced people and environmental issues.
But Beijing wants to bring another 140 GW of hydropower capacity on line by 2015, in order to meet its renewable energy targets.
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