[WATER OUR FOCUS]

Leppington Wastewater Servicing

Delivering gravity sewer infrastructure to support residential growth across the Leppington North precinct.
Sydney Water
Leppington North, New South Wales

1.9km Gravity Sewer Installation

[Project Background]

Wastewater Infrastructure for a Major Growth Precinct

As part of the NSW Government’s South West Growth Centre program, new wastewater infrastructure was required to service approximately 3,500 new dwellings in the Leppington North development precinct.

Following the delivery of the initial wastewater pumping station and first section of the Bringelly Road carrier, the second stage of the project involved extending sewer infrastructure through the Bringelly Road and Bonds Creek carrier systems to support continued residential development across the area.

[Scope Of Works]
Operating in Sensitive and Live environments

Construction of gravity sewer infrastructure servicing the South West Growth Centre development corridor.

Installation of 1.9km gravity sewer mains ranging from DN225 to DN525
Construction of 18 sewer manholes and associated vent structures
Excavation and support works for launch and receive shafts
Connection of new wastewater infrastructure to the live Sydney Water network
Project Technical Snapshot

Construction of gravity sewer infrastructure forming part of the Bonds Creek carrier network expansion.

1.9km
1.9km
Pipe Diameter
DN225 – DN525
Installation Depth
2m – 6m
[Outcome / Key Features]
Supporting Wastewater Infrastructure for Urban Growth
Outcome
  • Installation of 1.9km gravity sewer main forming part of the Bonds Creek carrier network
  • Sewer pipeline diameters ranging from DN225 to DN525
  • Construction of 18 sewer maintenance holes along the new alignment
  • Installation of lead-in pipelines and connection to the existing Sydney Water network
  • Construction of vent shafts and micro-tunnelling launch and receive shaft infrastructure
Key Features
  • Installation of sewer infrastructure within water-charged ground conditions up to 5 metres deep
  • Use of HDPE-lined precast manhole segments to enhance asset durability
  • Construction staging coordinated with micro-tunnelling subcontractor activities
  • Detailed planning and resident notification to minimise disruption to the surrounding community
  • Efficient resource coordination ensuring no delays to the tunnelling program
[Environmental Responsibility]
Managing groundwater and environmental controls during construction
Construction works were delivered in water-charged ground conditions requiring careful groundwater and excavation management. Environmental and safety controls were implemented throughout the project to ensure safe working conditions while protecting surrounding land and infrastructure.
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