Highland Council has said that geotechnical engineers from Aecom will work with rope access specialist Geo-Rope to carry out this year’s annual inspection of the rock face adjacent to the Stromeferry Bypass.
The work on the A890 route along the south shore of Loch Carron will start on 16 April and take five days to complete with traffic under lane control.
The rock face on the 1960s built bypass has been closed by 10 significant rock falls between 1990 and 2012. A landslide in December 2011 shut the route for four months creating the need for a 208km diversion route.
Alternatives to the current alignment have been proposed following a study by URS (now Aecom) with realignment estimated to cost £85M and a tunnel option at £171M.
Highland Council has also confirmed that major remedial work is planned in September on the slope to the west of the avalanche shelter near Attadale. This work is expected to take 12 weeks.
The council has said that the rock face near Attadale is very close to the A890 and the railway line and a road closure is expected to be put in place but plans are currently being developed to build a temporary bypass for cars and light vehicles.