North-South Line tunnel flooding was preventable, says Khaw

SINGAPORE (Oct 16): Poor maintenance of the stormwater sump pits led to the major North-South Line (NSL) tunnel flooding incident two weekends ago, said Transport Minister Khaw Boon Wan in a public briefing on the matter.

Khaw said there were standard anti-flooding systems with huge stormwater sump pits which could hold more than 5,000 cubic metres of rainfall.

On the evening of Oct 7, torrential rainwater had seeped in at Bishan station, causing the underground tunnel leading to Newton station to be submerged up to waist level.

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