After five years of construction, Novaliches-Balara Aqueduct 4 (NBAQ4) has recently been inaugurated to deliver 1,000 million litres of water per day, serving more than 7.4 million people in eastern Metro Manila.

The project involves construction of a 7.3km, 3.1m diameter tunnel beneath Commonwealth Avenue using a tunnel boring machine – a first in Metro Manila. Other components of the project include a new intake facility in La Mesa reservoir, an outlet structure in Balara treatment plants and the downstream network system.

The project also provides redundancy in the event that the existing three raw water aqueducts are shut down for subsequent assessments and rehabilitation.

Our Manila and Hong Kong team collaborated throughout the project phases – from undertaking the development of the reference design, specifications and contract for the project through to the construction supervision and commissioning.