Melbourne Water is upgrading the Lillydale Lake Wetland to continue its important work of keeping our rivers and creeks healthy.
Wetlands are a series of shallow, densely planted, man-made ponds that help filter pollutants that wash into our stormwater drains from roads, hard surfaces, parks and gardens. Essentially it acts as a natural filtration system that captures pollutants before entering our rivers and oceans.
Why the works are necessary
The Lillydale Lake Wetland is currently not performing to stormwater treatment quality standards. This is due to inadequate vegetation cover as the wetland is too deep for plants to survive. Additionally, water flows from the Olinda Creek are entering the wetland too quickly for its natural filtration process to occur. As a result, the wetland needs to be upgraded to restore it to its original process.
The project is being undertaken in two stages:
- Stage One involves draining the wetland, drying and treating stockpiled sediment, and reshaping the base of the wetland. This work is expected to be completed by mid-2021. At this time the site will be reopened to the public.
- Stage Two will involve revegetating the wetland area, which is expected to take place in late 2021-early 2022 when the weather is better suited for plant growth.
What do the works involve?
Works to upgrade the wetland will include:
- Removing vegetation within the current wetland to enter and exit the site
- Draining the wetland
- Reshaping the base with machinery to correct water depths
- Mixing lime with sediment to reduce acidity and support new plant growth
- Modifying the inlet and outlet flows to manage flows from Olinda Creek and into Lillydale Lake
- Removing the stockpile of wetland sediment
- Revegetating the wetland with new plants to support the filtering of pollutants.
Location of works
What to expect and when
Works to reshape the base of the wetland have commenced as part of Stage One of the upgrade. We will make every effort to minimise the impact of these essential works on the local community and the environment; however during construction you may notice:
- Increased heavy truck movement to and from the site
- Road cleaning will be conducted throughout the works
- Continued draining and reshaping in the wetlands
- Some odour as stockpiled sediment dries out
- Removal of some vegetation to access the wetland
- A pedestrian detour path has been constructed around the work area
- Noise from machinery
- The wetlands and boardwalk will remain closed to the public.
Pedestrian detour: With increased trucks delivering fill to the work site the path along Swansea Road will be closed. A detour path will be constructed around the work area for pedestrian safety.
Crews will be on site between 7am and 6pm from Monday to Friday and if required Saturday between 9am and 3pm.
We will provide regular updates on the progress of these works. If you would like any further information, please do not hesitate to contact the project team: