[WATER OUR FOCUS]

Sydney Water Trunk Mains – TNR2

Delivering a critical trunk water pipeline alongside the Northern Road upgrade to strengthen Sydney Water’s network across Western Sydney.
Sydney Water
Northern Road Corridor, Western Sydney, New South Wales

8.6km Trunk Water Main Installation

[Project Background]

Critical Water Infrastructure Supporting Major Road Upgrade

As part of the Stage 2 upgrade of The Northern Road between Narellan and Penrith, Sydney Water required the installation of a new trunk water main to replace and integrate with the existing system. The broader road project formed part of the $3.6 billion Western Sydney Infrastructure Plan, a joint NSW and Commonwealth Government initiative designed to upgrade critical transport infrastructure across the region.

The project was classified as Critical State Significant Infrastructure (CSSI), requiring coordinated delivery between the road upgrade program and the installation of the new Sydney Water trunk main. Killard’s scope was delivered within a tightly controlled corridor alongside active road construction, ensuring the pipeline installation aligned with scheduled shutdowns and network connections.

[Scope Of Works]
Operating in Sensitive and Live environments

Installation of major trunk water infrastructure delivered alongside the Western Sydney road upgrade program.

Installation of over 8.6km of trunk water pipeline infrastructure
Construction of reinforced concrete encased steel pipeline sections
Installation of valves, scour pits, hydrant pits, and associated structures
Connections to live Sydney Water mains within constrained construction corridors
Project Technical Snapshot

Construction of a large-scale trunk water main delivered alongside a major road infrastructure upgrade under constrained corridor conditions.

8.6km Trunk Water Main
8.6km Trunk Water Main
Pipe Diameter
DN450 – DN1050 (Steel, SCL and DICL pipelines)
Installation Depth
1.5m – 7m (including creek crossing)
[Outcome / Key Features]
Delivered Major Trunk Infrastructure within Transport Corridor
Outcome
  • Installation of 8.6km of trunk water pipelines including SCL, DICL and welded steel pipe sections
  • Steel pipelines installed across multiple diameters including OD508, OD660, OD813 and OD1050
  • Butt-welded steel pipeline installation with weld collars across the trunk alignment
  • Reinforced concrete encasement of over 2.8km of welded steel pipeline
  • Installation of DN600 (4.1km) and DN450 (600m) DICL pipelines
Key Features
  • Installation of flanged valve assemblies at 1km intervals along the full alignment
  • Construction of cast-in-situ scour pits and precast stop, air, and hydrant valve pits
  • Open-cut installation reaching depths of up to 7 metres beneath Thompsons Creek
  • Delivery within a restricted working corridor alongside the Northern Road upgrade works
  • Coordination with the principal road contractor to maintain program alignment
  • Connections to live Sydney Water mains completed within scheduled shutdown windows
  • Collaborative multi-crew delivery approach with up to six Killard crews operating concurrently
[Environmental Responsibility]
No items found.
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