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Unexpected weak formations blamed for Vietnam hydropower tunnel collapse

Twelve people remain trapped following collapse of a tunnel that was under construction for a new hydropower plant in the Central Highland region.

Lam Dong Province head of trade and industry Huynh Ngoc Canh said that the tunnel bore for the Da Dang-Da Chomo hydropower plant project was thought to have encountered unexpected weak layers. The tunnel excavation had reached 600m and the collapse is believed to have happened at 500m from the entrance.

Project promoter Song Da Company said that there were 32 workers underground at the time of the incident but 20 managed to escape. Rescue work is underway but the company has said that it may take up to two days to clear the collapsed material.

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