By Shabana Begum, The Straits Times, 19 Jun 2024
Beneath a green field at Bidadari Park, at a depth of about two basement carpark levels, lies an underground reservoir that will supply water to the new neighbourhood from the third quarter of 2024.
Holding three Olympic-size swimming pools’ worth of treated drinking water, the $27 million Bidadari underground service reservoir (USR) – the first of its kind in a housing estate – will boost the main water supply to about 8,800 homes in the estate during peak periods to ensure users enjoy good water pressure.
Like the 10-plus other service reservoirs in Singapore, it also serves as a back-up during emergencies or disruptions to PUB’s main water supply. These service reservoirs are not to be confused with catchment reservoirs such as MacRitchie and Bedok, which are among the 17 scattered across the island to collect rainwater that is subsequently treated.
The Bidadari USR, built by national water agency PUB at the site of the former Mount Vernon Columbarium, has two large underground tanks – each about 6.5m high – to save on surface space and keep the surroundings unmarred.
Just a pumping station above ground, occupying a 700 sq m plot of land, hints at its existence. The USR was designed to be largely unmanned, with an automated control room and five centrally operated pumps.
During off-peak hours when household water demand is not high, the two tanks will be filled with potable water from existing service reservoirs such as Bukit Kalang Service Reservoir.
While other service reservoirs like Fort Canning – built in 1929, it is the only other underground service reservoir – and Mount Faber are sited on high ground to leverage gravity to channel water to homes and offices, Bidadari’s is on low terrain.
The Bidadari USR is currently undergoing testing and commissioning, and is expected to be operational in the third quarter of 2024.
The completion of the Bidadari USR was announced by Minister for Sustainability and the Environment Grace Fu on June 19 at the joint opening of the biennial Singapore International Water Week and CleanEnviro Summit Singapore conferences.
“It will help fortify water supply to meet the water demand of present and future Bidadari residents,” she said, at the Marina Bay Sands Expo and Convention Centre.
The Bidadari estate will have about 10,000 homes comprising both public and private housing. As at February, more than 70 per cent of the 8,872 Housing Board flats there have been handed over to their owners, while the remaining flats are on track to be completed by 2025.
The concept of piloting a reservoir that optimises land use and is integrated with a park in the estate was announced in 2013.
“This approach has enabled PUB to save about 1,500 sq m of space by integrating the land above the water tanks with the adjacent Bidadari Park,” the agency said.














