Novaliches-Balara Aqueduct 4 (NBAQ4) project


  • Employer Manila Water Company Inc.
  • Country Philippines
  • Sector water and irrigation works, aqueducts and irrigation channels
  • Area Metro Manila
  • Contract value € 87,400,000 (amounting to € 43,700,000 – 2017 Annual Report)
  • Locality Manila
  • Ongoing work
  • Partecipation 50%


The NBAQ4 project, one of the largest water supply infrastructure projects undertaken by Manila Water, entails the construction of a fourth aqueduct from the La Mesa Reservoir to the Balara Treatment Plants (BTP) 1 and 2 to improve the reliability and security of the raw water transmission system. The 7.30-km long and 3.10-m diameter NBAQ4, which is one of the first tunnels to be constructed with a tunnel boring machine in Metro Manila, is composed of a new intake facility at La Mesa, an underground aqueduct, and an outlet facility at BTP. The fourth aqueduct will have a capacity of 1,000 MLD and will be constructed along Commonwealth Avenue in Quezon City.


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