Singapore's $6.5b-worth Deep Underground Tunnels to Transport Used Water
Published on by Water Network Research, Official research team of The Water Network in Government
When completed in 2025, Deep Tunnel Sewerage System (DTSS) Phase 2 will channel used water in the western parts of the island by gravity to a new water reclamation plant in Tuas.
The $6.5 billion project by water agency PUB will also free up 83ha of land - about the size of 116 football fields - currently housing the Ulu Pandan and Jurong Water Reclamation Plants, about 70 pumping stations and many more sewage treatment plants.
Source: YouTube Printscreen
Minister for the Environment and Water Resources Masagos Zulkifli marked the start of construction at a ground-breaking ceremony held in Penjuru Road in Jurong East.
He said: "We have experienced how unpredictable weather patterns can be, and we expect dry seasons to worsen with climate change. It is therefore critical to augment our water sources by reclaiming water, so it can be used again and again, in an endless cycle."
DTSS Phase 2 will give a boost to our Newater supply, he added.
One of the world's largest projects of its kind, DTSS will eventually channel all of the island's used water by gravity to water reclamation plants in Changi, Kranji and Tuas, where it is treated and then purified to produce Newater, or discharged into the sea.
The tunnels, which sit under the Republic's railway network and above its electricity grid, slope downwards towards the three plants as they are dug at a gradient.
Phase 1, which cost $3.4 billion, was completed in 2008. It serves the eastern parts of Singapore, channelling used water to the Kranji and Changi Water Reclamation Plants.
DTSS Phase 2 will stretch 30km across the western part of Singapore, starting under Keppel Road, at 35m below ground, following the Ayer Rajah Expressway (AYE) all the way to Tuas Bay, where it will be 55m below ground. It will also include a separate 10km tunnel in Tuas for industrial used water.
GRAPHIC: PUB
Source: Straits Times
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