Surplus rock from the ongoing A83 Rest and Be Thankful landslip mitigation project is to be reused as additional protection for the A83.
18,000t of usable rock from the catch-pit works at the Rest and Be Thankful will be used in the construction of landslip mitigation bunds above streams along Glen Kinglas, around 6kms from the Rest and Be Thankful.
These bunds will form a constructed embankment of material initially across six individual water channels next to the roadside that have been assessed to have the potential to deposit debris onto the trunk road should a landslip occur.
The 10m high bunds have the combined capacity to contain over 1,000t of debris should a landslip occur.
Teams from Bear Scotland, who manage and maintain the trunk roads in the NE and NW of Scotland on behalf of Transport Scotland, have worked with the landowner and specialist sub-contractor to develop the sustainable approach to protecting the A83.
This sustainable method allows Bear Scotland to maximise the benefit of the material being excavated from the Rest and Be Thankful while minimising the overall cost of the works which are being funded by Transport Scotland and the Scottish Government.
Bear Scotland’s north west representative Eddie Ross said: “Following detailed discussions with the landowner we are pleased to now start construction of this innovative new project to help mitigate against potential landslips in the future.
“The catch-pit project has so far produced around 18,000t of material which we’ve been storing safely, and now our teams have designed an innovative and sustainable reuse for the rock that will provide further protection for the A83 trunk road.
“The installation of the bunds at Glen Kinglas together with the fences and debris flow catch-pits at the Rest and Be Thankful will provide more resilience against any future landslips blocking this key route.”
The works will be focussed initially within six watercourse channels and the A83 will remain open with temporary traffic signals. The project will move in phases along this stretch of the A83 as the works progress.
In March, GE reported that work on landslip mitigation at Rest and Be Thankful had resumed following a winter break. The work was halted for the Christmas break but the restart was delayed by poor weather.