SINGAPORE - Eroded soil from cliffs that fell into a quarry at the top of Bukit Batok Town Park caused water to overflow from a drain on a slope onto a road.
South West District mayor Low Yen Ling said in a Facebook post that the incident happened near Block 383 in Goodview Gardens at around 7pm on Thursday (July 15).
She said she informed the authorities, including National Parks Board (NParks), PUB, the police and Chua Chu Kang Town Council.
In a statement to The Straits Times on Friday (July 16), group director of conservation at NParks, Mr Lim Liang Jim, said preliminary assessment found that recent heavy and persistent rain led to eroded soil from the cliffs falling into the quarry.
“This displaced a large amount of water from the quarry which suddenly flowed down the drain next to it and onto the road below,” he added.
“Further assessment of the stability of the cliffs is being undertaken. For public safety, access to the quarry remains cordoned off.”
Ms Low said in another Facebook post on Friday evening that NParks is studying the terrain and working with consultants to further determine the stability of the cliffs. The consultants are to advise on the next course of action to prevent similar incidents happening.
“NParks has continued to remove debris from the drain to let all excess water out, so as to prevent any overflow in the event of a heavy downpour,” she said.
“NParks is also draining excess water out of Seng Chew quarry through a portable pump. This will lower the water level at the quarry and prevent it from overflowing.”
Ms Low added in her earlier post: "Very grateful that all of them responded swiftly to our call and were on-site within a short time. Besides the wet and muddy conditions, a tree trunk was found on the road."
Traffic had to be diverted from Bukit Batok West Avenue 5 and an NParks contractor removed the tree trunk within one and a half hours.
Said Ms Low: "PUB engineers arrived on site and confirmed that the water pipes are intact. NParks is investigating the source of water that was discharged down the slope next to Bukit Batok Town Park (on Thursday evening)."
PUB on Tuesday (July 13) warned about a risk of flash floods in several areas of Singapore after heavy rain filled drains and canals to nearly full capacity.
The Meteorological Service Singapore said on July 1 that more thundery showers are expected in the first half of the month due to prevailing south-west monsoon conditions.