Some of our pipes in this area are more than 100 years old and replacing them will reduce the risk of bursts and leaks – making your water supply more reliable. One of the pipes in this area, the M4 water main, is nearing the end of its service life. We're completing a series of early investigations to locate existing services and ground conditions.
What's involved in the works?
We used specialist scanning equipment and radars to detect water, sewer, gas, telecommunications and electrical underground services. This work was completed in May 2025.
When existing underground services are identified, we use a vacuum truck with a high-pressure water hose to expose the services and record their exact location. This minimises the risk of damage to the buried infrastructure during construction.
This work usually takes 2 to 3 hours at each site and is noisy, especially as we cut through the roadway or pavement.
We're completing these investigatons from Coburg North to Brunswick East, as night work. Our crew is onsite from Sunday to Thursday night, 7 pm to 4 am. We won't be working on Friday or Saturday nights.
- In July we completed investigations along Lygon Street, starting at Bladen Avevue and working south to the Linear Park/Park Street Brunswick East.
- In August and September we'll complete these investigations from Malcolm Street, Coburg North to Bladen Avenue, Brunswick East, working in stages:
- along Elizabeth Street, from Malcom Street to Bell Street
- along Nicholson Street, from Bell Street to Moreland Road
- along Holmes Street, from Moreland Road to Albion Street
- along Lygon Street to Bladen Avenue.
We expect our investigations at the intersection of Holmes and Albion streets to take longer than at other sites - and will require traffic detours. These investigations are expected to start in the week commencing Sunday 31 August 2025.
To get a better understanding of the soil and ground conditions at a particular location, we use a drill rig to remove soil and rock samples for analysis and testing. This drilling work is noisy. Depending on the location, ground conditions and weather, these investigations can take up to 2 days to complete at each site. For safety, there may be detours and traffic management at these sites, and there may be additional vehicles in residential streets. These investigations have been ongoing since May 2025.
Also, we may complete specialist geophysical surveys in some streets. A slow-moving, mobile mapping vehicle determines the depth of rock by recording sound waves when a small weight is dropped onto the ground.
What to expect
- There will be specialist equipment and machinery at the investigation sites and additional vehicles parked along residential streets.
- Some of our work will be noisy and disruptive - and some can only be completed at night.
- For your safety, we’ll have traffic management onsite where needed.
- When we’re finished, we’ll restore the sites to as close as possible to the condition they were in before.
- We don’t anticipate any interruption to your water or sewer services.
Map of geotechnical investigation sites
