Wetlands - Melba (West Belconnen catchment)

25/03/2019 - Civil works nearing completion, macrophyte planting commencing soon.

15/2/2019 – Concrete structures nearing completion and soft landscaping commenced.

14/12/2018 - Recent storm events caused some damage and repairs are underway.

7/11/2018 – Earthworks are nearing completion.

1/8/2018 - Fences are now up around this site and construction will start soon.

21/6/2018 - Letters advising of the start of construction are being delivered to residents who live within a 100m radius of the site. Please check your letterbox. You can also view the letter here.

17/7/2018 - Site fences will go up next week.


Two new wetlands beside the Canberra BMX Club in will filter urban stormwater before it flows into Ginninderra Creek, replacing a largely unused space with an asset for local residents to enjoy.

The project is one of three water quality infrastructure projects being built downstream of Lake Ginninderra. Another two wetlands near Croke Place in McKellar and the revegetation of a stormwater drain in Florey complete the set.

The linked wetlands in Melba also include a sediment pond and an open gross pollutant trap. They have a combined surface area of about 9,200 square metres and are designed to remove over 26,000 kilograms of nitrogen, phosphorous and suspended sediment every year from urban stormwater destined from the Ginninderra Creek.

Rock armaments will protect the wetlands from periodic flooding.

Although a number of trees will need to be removed to make way for the wetlands, extensive re-planting will be undertaken.

Catchment West Belconnen
Start date June 2018
Likely construction finish date April 2019+
Anticipated establishment period Two years from the finish of construction^
Open for public use April 2019*

+Construction may be delayed by a number of factors, including bad weather. Planting is part of the construction phase and the timing of the growing season may impact on construction timelines.
^Water plants in particular may take up to two years to become established. The length of time may vary depending on ground and weather conditions.
*Some areas of the site may remain closed to the public past this point to allow for additional planting or for plants to become established.

Design changes

Although water quality is the priority for ACT Healthy Waterways, the project team is also working to a fixed budget and timeframe.

During the final design phase, some changes were made to the original concept designs to accommodate services, community feedback and maximise water quality benefits.

  • Armaments were added to protect the wetlands from localised flooding.
  • An encircling pathway was removed for public safety and operational reasons that relate to the flood risk.
  • Collection and distribution pipes were reconfigured to reduce the impact on the existing waterway.
  • The GPT was moved to an offline position.
  • A diversion weir was replaced by a culvert crossing for the access track.
  • The two access tracks proposed for community consultation has been replaced by a single track to minimise disturbance of the grass area and trees.

More information

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How this project might impact you

  • Trucks will pass in and out of the area during the improvement work. Routes have been established to minimise traffic disruption and noise.
  • The construction site will be fenced for public safety during the entire length of the project.
  • The contractor has prepared a Construction Environment Management Plan (CEMP) to detail how it will deal with flora and fauna issues.

Landscape design plan

Click on the image to enlarge.

Melba wetlands landscape plan