That’s why we’re connecting the North Western Main Sewer to the Maribyrnong Main Sewer via a new tunnel below the Maribyrnong River. This 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 in Werribee
  • protect the Maribyrnong River by containing sewage flow.

  • 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

Stage 1 involved building a 800m sewer from Hampstead Road to Medway Golf Club, Maidstone. It was completed in August 2025.

Stage 2 will connect this sewer to the Maribyrnong Main Sewer. This is on hold while we coordinate with ongoing investigations into long-term flood protection for this part of the Maribyrnong River.

Project map of Maribyrnong Main Sewer Connection

More information

Do you have a question? Contact the project team, or read more about this project on the Melbourne Water website.