Waterway restoration - Florey (West Belconnen Catchment)

Florey waterway

25/03/2019 - Remediation works and macrophyte planting completed.

06/02/2019 - Remediation work to repair damage caused by frequent summer storms is under way and will continue for a few weeks, weather permitting. This project is one of seven ACT Healthy Waterways sites across the ACT where works are taking place in an active water course and, as such, it is very susceptible to damage and delays during construction. Soil, plants and infrastructure can be washed away before they are established. While the weather is fine, crews are working to repair damage and establish infrastructure that will slow the water down and protect plants and soil before the next storm event.

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

7/11/2018 - Construction is complete and planting will commence soon.

21/06/2018 - 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.

17/07/2018 - Site fences will go up this week.

Parts of a concrete drainage channel in Florey will be returned to a more natural creek-like state, helping to slow and clean stormwater that flows into Ginninderra Creek.

The drain carries stormwater out of the surrounding suburbs into Ginninderra Creek which, in turn, flows into the Murrumbidgee River, north-west of Belconnen in NSW.

Concrete will be removed from sections of a 550m stretch of drainage channel and replaced with rock linings, soil and plants. The channel will be re-shaped and, where possible, topsoil will be reused on site to create the new planting beds.

The northern end of the site will include a riffle pool, designed to slow and oxygenate the water and a viewing platform, including rock seats, will be installed close to the existing playground close to tattersalls Crescent.

The project is one of three water quality infrastructure projects being built downstream of Lake Ginninderra. A wetland a short walk away on the corner of Copland and Ginninderra Dr and two wetlands near Croke Place in McKellar complete the set.

Revegetating the channel will remove 12,000 kilograms of nitrogen, phosphorous and suspended sediment every year from urban stormwater destined for Ginninderra Creek.

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.

  • Earthworks have been configured to minimise the impact on existing trees in the drainage corridor.
  • The original design included the replacement of the concrete invert near Ginninderra Drive with soft landscaping. However, it became apparent that the constant base flow would lead to erosion. As a result, a reduced-width concrete invert augmented with vegetated side swales and rock bars will be built, creating a riffle pond.
  • A 200 square metre detention basin has also been added.

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.
  • Detours for walkers and cyclists will be in place and will be clearly signposted.
  • 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.

Waterway restoration - Florey - landscape design