Sydney Water has awarded a major infrastructure contract to McConnell Dowell and Gamuda Australia Engineering (together MDGJV) to build a new drinking-water pipeline linking the Ryde Pump Station to the suburbs of Pymble and the Wahroonga Reservoir — restoring a key main first laid down in 1936.
Although the original main was retired in 2014, the reinstatement forms part of a broader effort to future-proof Sydney’s water network as population and housing growth accelerate across the North Shore.
The new pipeline — a DN900 watermain spanning approximately 11km — will be built using a combination of traditional open-trench construction and trenchless techniques for sections requiring minimal environmental and community impact.
Early works, including environmental investigations and detailed design, are slated to begin in early 2026. Construction is expected to be complete by 2028, securing long-term water resilience and supporting continued growth in one of Sydney’s fastest-developing regions.