Maribyrnong Main Sewer Connection project

Icon showing the project status of current Current
Maidstone Avondale Heights
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Stage 2 construction on hold
The next stage is on hold while we coordinate with ongoing investigations into long-term flood protection for this part of the Maribyrnong River.
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This approach ensures the project can be delivered safely, efficiently and with as little community disruption as possible.

We’re building a new tunnel below the Maribyrnong River that will connect two important sewers in our network: the Maribyrnong Main Sewer and the North Western Main Sewer.

Without improvements like these, our sewerage network would reach capacity as more people call Melbourne home.

Why this project is important

The Maribyrnong Main Sewer is one of the main sewers in Melbourne Water’s sewerage network. The new sewer connection will:

  • provide a secure and reliable sewerage service for more than 86,000 people over the next 100 years
  • transport sewage to the Western Treatment Plant, located in Werribee
  • protect the Maribyrnong River by containing sewage flows.

What’s happening and when

Stage 1 (complete) involved building a 800m sewer from Hampstead Road to Medway Golf Club, Maidstone.

Stage 2 (on hold) will connect this sewer to the Maribyrnong Main Sewer.

Update: proposed bridge and shared path

Following the October 2022 Maribyrnong River flood, we revised the flood modelling tools used to plan projects to better reflect changing climate conditions.

The new modelling shows that the proposed pipe bridge would adversely impact the floodplain. It was therefore decided not to proceed with the pipe bridge, and instead tunnel under the river.

Now that the bridge will not proceed, Maribyrnong City Council are reviewing options for the shared use path along the Maribyrnong River.

Project location

Maribyrnong Main Sewer Connection map

Keeping you informed

We’ll inform the local community, impacted residents and businesses through a variety of communications and engagement activities. This can include signage, bulletin notifications, door knocks, social media and more.

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