A notice from Opus regarding upcoming cliff stabilisation on Rocks Rd. . The work is expected to take approximately 22 weeks, commencing on the 4 May 2015.
Following the heavy rain and flood event in December 2011 some areas of the cliff above State Highway 6, Rocks Road were de-stabilised. This led to surface material and rocks falling onto the highway. As a result, there has been investigation and designing methods to stabilise the cliffs along the highway.
This project is to reduce the instability issues on the cliff face directly above State Highway 6, Rocks Road. It is proposed to carry out stabilisation works at four sites between the Basin Reserve and Magazine Point. This will involve inserting rock anchors into the cliffs, installing drainage pipes for groundwater, and applying a layer of steel mesh and either sprayed concrete or a special mat surfacing to the cliff face.
The objective of the stabilisation work is to minimise the risk endangering road users on the highway below of further potential surface material and rocks falling onto the highway.
From May to October along State Highway 6 Rocks Road, between Basin Reserve and Magazine Point, specialist contractors will be drilling and installing 219 rock anchors, 1,600m2 of shotcrete and nearly 1,400m2 of mesh.
A contract for the works has been awarded to Downer Ltd and they are planning to commence work on the 4 May 2015. We expect this phase of work to take approximately 22 weeks.
Our aim is to do the work with as little disruption as possible. Most of the work will be carried out during daylight hours and our contractor will be taking steps to minimise dust, noise and vibration effects to residents. Work that will restrict the traffic flow on Rocks Road will be carried out at night, but this will be on an irregular basis.
Protective barriers and hoardings will be installed on Rocks Road to protect the public from the possibility of rock falls while the work is underway. The work sites at the top of the cliff will be secured with fencing, warning tapes and signs, but it is important that children and pets are kept clear of the work sites and cliff edge at all times.