Deep Tunnel Sewerage System Phase 2 (DTSS Phase 2)

  • Location: Singapore
  • Location: Singapore
  • Client: PUB, Singapore’s National Water Agency
  • Project status: Complete

Project Overview 

The DTSS2 Project is the second phase of a nationwide program that completes Singapore’s long-term vision of a recycled water super-highway that further enhances its water security and achieves its ultimate objective of being self sufficient to meet the water demands of its growing population and industries. It comprises of a tunnel conveyance system of approximately 63km of Link Sewers of diameter 0.3-4m and 35km of tunnels of diameter 3-6m, adding resiliency to Phase 1 and adopting lessons learned, focusing on energy usage, operational efficiency and minimisation of land-take.

Our role

  • Aiding in the initial planning definition phase comprising:
    1. Feasibility study
    2. Preliminary design
  • Overall programme management for Phase 2 alongside PUB

Aspirations

  • Minimising land take whilst freeing up existing land through decommissioning of old parts
  • Maximising integration with existing infrastructure through cross connection and linkages
  • Minimising personnel and energy usage through use of sustainable energy and technology

Unique features and solutions

  • State-of-the-art practices and processes benchmarked against other local and international projects
  • Integration of the Tuas WRP with the co-located Integrated Waste Management Facility (IWMF) to fully utilise the water/energy nexus, resulting in lower overall operation costs
  • New South Tunnel and a state-of-the-art Water Reclamation Plant at Tuas to compliment infrastructure in Phase 1

Benefits and Achievements

1
Expertise

Tuas Water Reclamation Plant (TWRP) is the world’s largest water reclamation facility at 1800 MLD

2
Environment Friendly

Return of about 100 hectares of very valuable land that can be redeployed for other use. Implementation of the entire DTSS will result in 50% reduction in land taken up by used water infrastructure once it is fully completed, from 300 hectares in the 1990s to 150 hectares in the long terms

3
Award Winning

PUB: Consultant Safety Recognition Award, 2020

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