Doreen to Diamond Creek Sewerage Project
We are constructing new sewerage infrastructure in Doreen, Yarrambat and Diamond Creek to ensure the reliability of the sewerage system, cater for growth in Melbourne’s northern suburbs, and reduce the likelihood of sewage spilling into the environment during heavy rain events.
The project involves constructing a new 10-kilometre-long section of sewer pipe, and 18 new sewer manholes, within parkland and road reserves in the Doreen, Yarrambat and Diamond Creek areas.
Building the underground sewer pipe involves our contractor, MFJ Constructions, upgrading or replacing an existing sewer pipe.
MFJ Constructions will be working in some public parkland and along-side of local streets, as show in the map below. Construction started at the northern end of the alignment, in the Plenty Gorge Parklands, in March 2019.
Construction started in March 2019, and is scheduled to be completed in late 2020, subject to good weather and ground conditions.
October 2019 - project update
- Our most noticeable works are occurring in the road reserve alongside Yan Yean Road, between Yarrambat Park and Ironbark Road.
- Other works have recently started in Watkins Street, Diamond Creek. Some traffic management may be required on occasion, however traffic flow should be able to move freely at most times.
- The section of works in Murray Road are ongoing.
- The works in Diamond Creek have experienced delays and tunnelling under Main Street is taking much longer than expected due to very hard underground rock. This section of work is now expected to be completed in early 2020.
September 2019 - Main Street, Diamond Creek
Since June 2019, MFJ Constructions has been constructing a 150-metre long section of sewer pipe by tunnelling underground beneath Main Street, at the intersection of Collins Street and Bage Street. New sewer manholes are also being built in the side of the road of Collins Street and Bage Street.
This section of work is taking longer to complete due to the presence of very hard underground rock.
This section of works is scheduled to be completed in early 2020, depending on good weather and ground conditions. MFJ Constructions will be working Monday to Friday from 7.00am to 3.30pm, and on Saturdays from 8.00am to 1.30pm.
People living or driving close to the works area will notice noise from machines and trucks during work hours.
Traffic flow along Main Street won’t be affected, however part of Bage Street will be closed, including overnight and on weekends. Vehicles will be able to access Bage Street properties by following the detour via Galatea Street. A traffic management plan will be in effect during work hours to ensure the safety of workers, pedestrians and motorists.
Footpaths will remain open throughout the works, and people will be able to access their driveways.
Avoiding disrupting significant Aboriginal sites
In February 2018 our design consultant, Jacobs, conducted extensive investigations on the banks of Plenty River to see if there were any Aboriginal artefacts (such as stones).
After finding a large stone artefact scatter (close to 400 artefacts) that extended several hundred metres, Jacobs consulted with the local Registered Aboriginal Party (the Wurundjeri) and Yarra Valley Water to negotiate a different construction technique to the traditional open-cut excavation method. When working near the Plenty River area, Yarra Valley Water is instead boring their pipe underground, which is protecting the archaeological site from harm.
The stone artefacts that were recovered have been analysed and contribute important information to the story of past Aboriginal life in what is now greater Melbourne.
Protecting the environment
By undertaking this project, Yarra Valley Water is protecting the local environment and waterways by reducing the likelihood of sewage spills during heavy rainfall events. However, it is equally important to protect the local environment, waterways and wetland during construction.
We have completed extensive environmental investigations to choose the best construction methods and reduce environmental impacts during construction.
Building pipes with less impact
To reduce the impact of our works on established trees and the environment, and to avoid disturbing areas where aboriginal artefacts have been discovered, most of the new pipe is being constructed by using a machine to bore a tunnel under the surface, and then pushing lengths of pipe into the underground tunnel.
Watch how we build pipes by drilling underground.
These works will not affect water, recycled water and sewerage services in the area.
Despite our efforts to minimise the impacts of these works on the local community, people will at times notice construction noise, dust, and traffic disruptions. A Council-approved traffic management plan will be in effect to ensure workers, pedestrians, cyclists and motorists are safe.
Due to the depth at which the new pipe will be laid, and the high-pressure levels within the pipe itself, the new sewer pipe is not suitable for nearby properties to connect to for a sewerage service.