Ausgrid is planning to lay new 132,000 volt underground cables between Artarmon and Mosman to replace existing cables that are nearing the end of their service life.
Ground Investigation Work
As part of planning for the project, Ausgrid need to undertake ground investigation work in streets in the North Sydney Council area to identify suitable locations to lay the new cables and conduits. This work will comprise of trial holes, pot holes and bore holes.
RCA has been engaged to undertake bore holes at regular intervals along the preferred cable route to confirm geotechnical conditions and pavement make-up. These will be approximately 0.1m in diameter and between 1m and 5m deep.
Diona has been engaged to excavate trial holes between 2m and 10m long, 0.3m wide and around 1.5m deep in the roadway to locate existing utility services and confirm available space for the new cables. Small diameter pot holes about 0.1m in diameter and 1.5m deep will be excavated in the road to locate specific services.
Both contractors are expected to start on Monday 21 May 2018 and works should take two weeks to complete. (Map of the investigation are below.) Work hours will be 7am to 6pm, Monday to Friday, and 8am to 1pm on Saturdays, if required.
What to Expect during the Investigation Work
There will be some noise as Ausgrid will be using a concrete saw or drilling rig to cut the surface of the road. Ausgrid will minimise this as much as they can. A section of the traffic lane will be closed, but maintain two way traffic flows, where possible. Traffic controllers will guide road users and pedestrians around the work areas safely. Some parking spaces adjacent to the work area will be temporarily removed to allow traffic to pass. Once the work is finished, parking will return to normal. Access to driveways will be maintained, unless arrangements are made in advance with affected residents and/or businesses.
Ausgrid do not need to interrupt electricity supply to do this work.
The information collected during the ground investigations will be used to refine the preferred cable route as required. As part of the project approval process, Ausgrid will be preparing an environmental assessment - Review of Environmental Factors (REF) to assess the potential environmental impacts of the project. The REF will be placed on public exhibition in mid-2018 and key stakeholders and the community invited to make submissions.
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