Timeline
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Design
October 2023 – September 2024Complete
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Contractor procurement
October 2024 – January 2025Complete
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Construction to commence (reserve)
Early April 2025In progress
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Construction to commence (road)
Late April 2025Scheduled
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Construction complete
December 2025Scheduled
Latest News
Stage 1 roadworks in Gage Street and Third Avenue will commence on 29 April and are expected to be completed by mid-June, to construct new drainage infrastructure as part of Stage 4 of the Trinity Valley Drainage Upgrade. A summary of the works and timing is provided below.
Please refer to the Stage 1 maps in the Documents tab on the right of the project page for further details regarding location, timing, and traffic arrangements.
GAGE STREET:
> From late April to the end of May, new stormwater pipe will be constructed in the western carriageway of Gage Street.
> Traffic will be restricted to one lane in the southbound direction during construction.
> Local detours will be in place during the works.
> To install the pipe crossing across Gage Street to Seventh Avenue, a full road closure will be in place immediately south of the roundabout from Gage Street to Seventh Avenue in late May.
> Please refer to onsite signage for further details.
THIRD AVENUE:
> From mid-April to mid-June, new stormwater pipe will be constructed in Third Avenue between Gardiner Avenue and Glynburn Road.
> There will be full closures of both intersections (at different times to minimise local traffic impacts) and along sections of Third Avenue to safely construct the new drainage.
> Work will progress in an easterly direction, with areas of road being reopened progressively as soon as practicable.
> Local detours will be in place during the works.
We are pleased to announce that the construction phase of Stage 4 of the Trinity Valley Drainage Upgrade will begin in April 2025. The project is expected to be completed by the end of 2025, weather permitting.
Key information:
> Start date: April 2025
> Expected completion: End of 2025 (weather permitting)
> Initial works: Site survey, site compound establishment, and preparatory works
> Traffic restrictions: Short-term restrictions to ensure worker safety; through access for motorists will be maintained, but speed limits may apply.
Important notices:
> St Morris Reserve closure: The reserve will be closed from Tuesday 1 April until late 2025 for the duration of the project
> Reserve works: Vegetation and topsoil removal, demolition, and site preparation will begin in early April 2025
> Safety measures: Temporary fencing will be installed around the reserve to ensure public safety during construction.
We are pleased to advise that South Australian based contractor, Bardavcol Pty Ltd, has been awarded the contract to undertake Stage 4 of the Trinity Valley Drainage Upgrade, including the upgrade of the St Morris Reserve.
Preliminary works to start in late February, include:
> Establishment of a compound in St Morris Reserve
> Site survey and set out
> Location of underground utility services.
Work hours on site: Monday to Friday, 7am to 5pm.
Traffic and access during construction:
> Night works will be conducted on Glynburn Road to maintain traffic flow. Advance notice will be provided to affected properties before work starts
> Traffic restrictions and detours will be in place during major works to ensure safety for workers and the community
> Please follow on-site signage and allow extra time for travel around the project area
> If access to your property is affected, you will be notified before work begins near your property or business.
Thank you to the community and residents for their patience as we complete these important infrastructure upgrades and improve our city’s recreational spaces.
Upcoming SA Water works – Third Avenue, Green Street, Seventh Avenue and Gage Street 6 January 2025 to late January 2025.
SA Water will begin water service alteration works on Monday, 6 January 2025 as part of the early works for the Trinity Valley Stormwater Upgrade Stage 4, including the St Morris Reserve Upgrade.
As part of these essential works, traffic restrictions will be in place and local detours may be necessary. We kindly ask the community to be mindful of changes in traffic conditions and to allow extra time for travel in the affected areas.
Vehicle access to local properties will be maintained throughout the works period.
If your property is expected to experience temporary disruptions to your water service, further information will be provided directly to residents by SA Water or its contractor prior to the works taking place.
We appreciate your cooperation and understanding as we complete these important works.