Deep Tunnel Sewerage System Phase 2 (Link Sewers)

The Deep Tunnel Sewerage System (DTSS) Phase 2 in Singapore expands the country’s clean water infrastructure with a 30 km south tunnel and 70 km of link sewers. This massive project is part of PUB’s long-term strategy for water reclamation, treatment, and disposal. Encardio Rite supplied geotechnical instrumentation for monitoring the link sewers, including 215 piezometers and 50 arc weldable strain gauges. These instruments ensure structural stability and efficient sewage management for the tunnel system, contributing to Singapore’s sustainable water reclamation goals.

Deep Tunnel Sewerage System Phase 2 (Link Sewers)

The Deep Tunnel Sewerage System (DTSS) is a massive integrated project being developed by the Public Utilities Board (PUB) in Singapore to meet the island country’s long-term clean water needs through the collection, treatment, reclamation, and disposal of used water from industries, homes, and businesses. The DTSS project involves the construction of two large deep gravity tunnels, 6.5 m in diameter and 80 km long in total, located about 50 m below the surface, to carry sewage to three centralized water reclamation plants (WRP). The water used is treated and purified to a high quality known as NEWater. The excess treated effluent is discharged through deep sea outfall pipes into the straits of Singapore.

DTSS phase II extends the tunnel system to the west of Singapore through a 30 km-long south tunnel, 70 km of link sewers, the Tuas WRP, and a 12 km deep-sea outfall.

Our marketing associate in the region carried out instrumentation and monitoring works for the link sewers of the DTSS Phase 2 Project and the Tuas water reclamation plants. Almost 215 of our piezometers and 50 arc weldable strain gages were used in the project. All sensors (100%) have been operating satisfactorily until today.