Precast Pipes - Dirty-Water Pipes

Singapore's Deep Tunnel Sewerage System (DTSS), when fully completed, will replace the existing sewerage system which dates back to 1960. DTSS will consist of two large bore, deep tunnels that crisscross the island, two water reclamation plants and two deep-sea effluent pipelines, together representing a total investment of around $ 7 billion. Some 100 km of tunnels, with diameters of up to 6.5 m, will be constructed at depths between 20 m and 60 m, and will carry sewage and waste water by gravity to the reclamation plants at Changi and Tuas, both built on reclaimed land.