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Diggers Rest Outfall Sewer Project

Western Water is constructing a new two-kilometre long sewer main to service growth in Diggers Rest’s new housing estates.

Project snapshot

Town(s): Diggers Rest, 

Status: Complete

Cost: $3 million

Expected Completion Date: January 2020

What does this project involve?

Construction of a new two kilometre-long, 450mm outfall sewer main that will transfer sewage from Diggers Rest’s new housing estates to the Sunbury Recycled Water Plant for treatment.

Construction starts near Tame Street and runs in a westerly direction through open land until the Plumpton Road roundabout and then along the road reserve on the northern side of Diggers Rest-Coimadai Road.

Diggers Rest Outfall Sewer alignment

Why is this project needed?

The sewer network needs upgrading to ensure Western Water can meet the increased demand for essential sewer and water services.

Diggers Rest is home to 5,800 residents and growing at a steady rate. It is projected to reach 7,700 residents by 2023. Most of this growth is to the west of the township—at the St Genevieve and Bloomdale residential developments.

This also complements the $53 million upgrade to the Sunbury RWP, which ensures the plant can cope with increased sewage flows due to population growth in both Diggers Rest and Sunbury.

When will construction start?

Construction commenced in mid-January 2019 and is expected to be completed by January 2020. Work hours will be 7am–5pm Monday to Friday and 7am–1pm on Saturday (if required).

Who is undertaking the work?

Crowley Excavation Pty Ltd is undertaking the work on behalf of Western Water.

Will the water supply be impacted?

There will be no impact to water supply during construction of the sewer main.

What impacts can be expected during construction?

Impacts will be kept to a minimum; however, the following may occur:


There may be some construction traffic along Diggers Rest Rest-Coimadai Road and the Diggers Rest Rest-Coimadai / Plumpton Road roundabout as the contractor goes about their work. Signage will be in place informing road users of construction works.

Minor construction traffic is anticipated along Tame Street.

There will be some construction noise to the rear of Tame Street but only for a short period of time.

Noise and dust

There will be some construction noise and dust may be visible but this will vary.


Fencing, barricades and trench covers may be used near the work site to ensure public safety. Traffic management devices will also be in place along Diggers Rest-Coimadai Road.

More information?

For more information, email or contact Western Water’s Community Engagement Advisor on 1300 650 422 during business hours.

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