PUB to build diversion canal to protect Orchard Road belt from floods

PUB to build diversion canal to protect Orchard Road belt from floods
The section of Stamford Canal at the junction of Orchard Road and Killiney Road.

SINGAPORE - The new diversion canal will connect the upstream section of Stamford Canal, which covers Orchard Road, to the Singapore River. On completion, water collected from the upstream catchment section of the Stamford Canal will flow into the new diversion canal towards Singapore River and then into Marina Reservoir.


Get the full story from The Straits Times.

PUB TO COMMENCE CONSTRUCTION OF STAMFORD DIVERSION CANAL More drainage improvement projects to commence in second half of 2014

Singapore, 22 May 2014 - PUB, the national water agency will begin construction work for the Stamford Diversion Canal in the third quarter of 2014. The Stamford Diversion Canal, together with the Stamford Detention Tank, is part of a holistic "source-pathway-receptor" approach to strengthen flood protection for the Stamford Canal Catchment, which covers the Orchard Road shopping belt.

The new 2km-long diversion canal will run underneath the road, from Tanglin along Grange Road, across Hoot Kiam Road, through Irwell Bank Road, River Valley Road, off Kim Seng Road, and to the Singapore River. Connecting the upstream section of Stamford Canal to the Singapore River, the diversion canal will be 6m to 14m wide and 3m to 4m deep. Stormwater from the upstream section of Stamford Canal catchment will flow into the new diversion canal towards Singapore River and eventually into the Marina Reservoir.

The construction work for the diversion canal will be carried out in two phases. The first phase (Tanglin and Kim Seng areas) will be carried out by Or Kim Peow Contractors (Pte) Ltd at S$50.6 million and will start in the third quarter of 2014, while a tender for the second phase (Grange Road to River Valley Road) has been called. Work on the entire diversion canal is expected to be completed in 2017.

The other measure to enhance flood protection for the Stamford Canal catchment is the construction of a detention tank near the junction of Tyersall Avenue and Tyersall Road. PUB started construction work for the Stamford Detention Tank in December 2013. With a storage capacity of about 38,000 cubic metres or 15 Olympic sized swimming pools, the underground detention tank, when completed in 2016, will capture excess stormwater from the drains along Holland Road. After the rain subsides, the water will be pumped back into the drains for subsequent discharge into the Marina Reservoir.

Works for the diversion canal will be carried out in close proximity to the Land Transport Authority's (LTA) construction sites for the Orchard Boulevard and Great World MRT stations. PUB and LTA have been working closely to coordinate the works. During construction, there will be traffic diversions at a stretch of Grange Road at the junction of Orchard Boulevard and River Valley Road off Kim Seng Road. Roads will remain accessible and the same number of lanes will be maintained. PUB and LTA will plan the diversions carefully to minimise inconvenience and disruption to the public and stakeholders in the vicinity.

Hoardings will be installed to demarcate the work zone, and earth control measures will be put in place to prevent silt discharge. We will also ensure at all times that the noise level is kept within allowable limits.

Enhancing Stormwater Management with Drainage Improvement Projects

Apart from the Stamford Diversion Canal and Stamford Detention Tank, PUB has ongoing and upcoming drainage improvement projects at about 170 locations around Singapore. Projects at 25 locations have been completed from January to April this year.

"To enable Singapore to cope with more intense rainfall, we have adopted a holistic stormwater management approach to mitigate flood risks by strengthening the drainage infrastructure and managing stormwater at "source" and where floods may occur. We are progressing well on the ongoing drainage improvement projects, while plans for new projects are being developed for implementation in the second half of 2014. We will also continue to work with the developers and building owners on implementing "source measures" to slow down the flow of stormwater into the public drainage system and "receptor measures" to protect the buildings against floods," said Mr Tan Nguan Sen, PUB's Director of Catchment and Waterways.

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