Rain garden - Gowrie

14/12/2018 - Civil works ongoing. Gross pollutant trap (GPT) in place.

7/11/2018 – Earthworks have started.

28/9/2018 – 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.

8/10/2018 - Site fencing is in place and works have started.

11/10/2018 – The carpark is closed while pipes are installed beneath it. It will reopen for the start of term 4 and work will recommence in the summer holidays.

15/10/2018 – Car park has reopened.

A new rain garden on the southern edge of the Gowrie Playing Fields will be the 20th infrastructure project to be built as part of ACT Healthy Waterways and the seventh in the Lake Tuggeranong catchment.

With a total treatable area of 3000 square metres, the rain garden will be split into six cells. Water will be diverted to it from an existing stormwater pipe, south of the Castleton Crescent underpass.

The treated water then returns to the stormwater system flowing into Tuggeranong Creek further downstream which, in turn, flows into Isabella Pond and Lake Tuggeranong.

Some trees will have to be removed ahead of construction. However, Casuarina cunninghamiana and Eucalyptus rubidia (to suit the existing trees on the site) will be planted at the end of construction.

During construction, parts of the nearby cycling and pedestrian paths will need to be closed for short periods of time. Diversions will be put in place but cyclists and walkers may have to cross access roads or wait for site traffic to pass. Everyone is urged to take care while in the area.

Start date October 2018
Likely construction finish date May 2019+
Anticipated establishment period Two years from the finish of construction^
Open for public use May 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. During the establishment period, flows into and through the asset will be managed to suit the conditions and to protect and nurture the plants.
*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.

  • Site location moved north east within the same block to better suit the existing stormwater system of the area.
  • The stormwater diversion pipe has been relocated to suit the new site location and is to be installed below the existing carpark to protect adjacent trees.
  • Sediment bays have been combined to a single larger structure to facilitate maintenance.
  • The size of the asset has been increased by approximately 5%.

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