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Current Works

Early Works 2021

The early works program is underway on the T2D Project. This work includes utility service relocations, ground investigations and surveying.

For information relating to the location and timing of any works in your area please click on the image below and view the interactive map.

We will notify nearby local residents and businesses in advance of any activities that are planned for their area and will work to keep disruption to a minimum.

Detours, signage and traffic controllers will be in place to manage traffic flow and ensure motorists, cyclists and pedestrians are able to safely navigate around our work areas.

GI Interactive Map

Service Relocations

We’ll be relocating services like power, water, gas, waste water and telecommunications to enable the construction of the T2D Project.

Service relocation works have begun at the southern end of the project. SA Power Networks is undertaking major relocation works around Clovelly Park, helping to clear the way for T2D’s Southern Tunnel launch site and construction laydown area. Works to relocate Optus telecommunications services are also underway.

At times, SA Power Networks will need to undertake day works to remove and erect Stobie poles, and install both above- and below-ground cables in Clovelly Park and Tonsley, from 23 August This work will last for approximately four months.

Optus will also be installing telecommunications pits and cables in the area until the end of September.

For more information on these works, contact SA Power Networks on 13 12 61 and Optus on 0411 047 056.

Ground Investigations

In August 2020, we started a drilling and engineering survey program in areas close to  South Road. We have completed Phase One ground investigations, which included;

  • boring approximately 200 holes to various depths to understand the geology, contamination and hydrogeological conditions;
  • completing over 5 km of drilling; and
  • conducting about 5,000 tests.

In May 2021, the Minister for Infrastructure and Transport announced the contract Award for Phase Two Ground Investigations which began in June 2021.

The Ground Investigation program involves using drill rigs to drill boreholes into the ground to collect soil and water samples so we can test local geotechnical and hydrogeological ground conditions, and for any potential contamination.

Drill locations have been carefully selected to minimise impacts to road users, businesses and residences as much as possible while ensuring we gather this crucial data. In some cases, however, unavoidable short-term road closures are required.

The selected locations do not necessarily correspond to areas that will be impacted by the project in the final design.

The information from these investigations will help refine and inform the final project design and determine the exact locations of the tunnels.


Our engineering survey teams will at times be on ground along the corridor.

The survey teams are collecting information on kerbs, footpaths, underground and overhead services and any other relevant features within the existing road corridor. The information collected via the use of surveying personnel and electronic equipment, will aid in the development of the project design.

In some instances as part of the surveying works, you may notice different symbols painted onto the footpaths and roadways. These markings are assisting us to locate assets in the ground.

There should be no impact to residences or businesses whilst undertaking these works and the extent of the survey works and/or markings on the ground do not necessarily correspond to areas impacted by the project in the final design.


Other Works

For information about other ongoing roadworks and traffic disruptions, please visit the Traffic SA website at