How will the project be completed?
- A new 1.2 kilometre gravity sewer will be built to divert sewage flows from the MRM Sewer into the larger North Western Sewer in Maidstone, which transports wastewater to the Western Treatment Plant.
- The new sewer will connect from the MRM Sewer on the northern side of the Maribyrnong River, crossing the river via a new pipe bridge, with a buried sewer to be constructed from Medway Golf Course to Hampstead Road.
- Over 800 metres of the new sewer will be constructed by a tunnel boring machine (TBM) under Williamson Road. The sewer will be located at depths of up to 30-40m below ground.
- The remaining section of the new sewer will be constructed by open-cut trenching methods at a depth of 2-4 metres below ground.
- As part of this project, we're working with Maribyrnong City Council to open up an inaccessible section of land between Medway Golf Course and the Maribyrnong River for the community to enjoy continuous views and access along the river.
Constructing the new sewer with a tunnel boring machine (TBM)
We’ll be using a ‘pipe jacking’ TBM to construct the main length of the new sewer. Force is applied to push the new sewer pipe through the ground while controlled excavation takes place at the face of the TBM.
The process involves: