Shanghai Tunnel Engineering Co (Singapore) Pte Ltd (STEC), has been awarded the Contract T-11 by Singapore’s national water agency PUB to design and construct the tunnels under Deep Tunnel Sewerage System Phase 2 (DTSS2).
The Deep Tunnel Sewerage System, which will be the conduit for all used water islandwide, will boost water recycling and free up space in land-scarce Singapore. DTSS2, which costs $6.5 billion, will also free up an additional 83ha of land - about the size of 116 football fields - currently housing the Ulu Pandan and Jurong Water Reclamation Plants, pumping stations and sewage treatment plants.
DTSS2 (include Tender Contract T-07 to T-11) will stretch 30km across the western part of Singapore, starting under Keppel Road, at 35m below ground, following the Ayer Rajah Expressway (AYE) all the way to Tuas Road, where it will be 55m below ground. It will also include a separate 10km tunnel in Tuas for industrial used water.
PUB DTSS2 Contract T-11 (Contract Value: S$ 472,168,000) include design and construction of a 6 km South tunnel, its shafts and other features from Shaft Ki at Keppel Road/Anson Road junction, along Ayer Rajah Expressway (AYE) to Shaft M at Portsdown Avenue/AYE (Shaft Ki to Shaft M), and a 5.5 km Southern Region Link Sewer Tunnel, its shafts and other features from Sentosa Island to Warwick Road/Alexandra Road junction. Works are expected to start in December 2017, the construction period of the project is about 6 years.
(Image Source: PUB, 2017)