The Deep Tunnel Sewerage System (DTSS) is a water management system that comprises a network of sewers that lead to two major tunnels (Phase 1 & 2). The network covers nearly all of Singapore and connects with three large water reclamation plants at the northern (Kranji), eastern (Changi) and western (Tuas) ends of Singapore, as well as with outfall pipes.
Part of the phase 2 tunnel is lined with precast segments reinforced with Dramix® 4D steel fiber concrete reinforcement.