A contractor has been appointed to carry out the works at Gardenstown in the area between New Church and Harbour Road. The 19-day project will get underway on Wednesday, 14 February.
Boreholes will be drilled at a number of sites to give engineers a clearer picture of ground conditions.
The landslip first occurred overnight on 28 November last year, depositing debris on the B9123 Harbour Road. The route has been closed since due to the risk posed by the insecure hillside.
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Despite temporary protection being put in place and the road reopening for a short time, further slippages meant the route had to be closed again.
Head of Roads, Landscape and Waste Services, Philip McKay, said: "It is extremely unfortunate that the road layout in Gardenstown means closure of Harbour Road at this location prevents all vehicular access to the New Ground, the harbour area and Seatown. The closure is certainly causing considerable disruption for those living and working below the road closure.
"However, the slip is deep and extensive and unfortunately there is no quick or easy solution to a landslip like this. From time to time we have had to deal with landslips impacting on public roads across Aberdeenshire, but this one is perhaps the most complex we have had to deal with.
"Ground investigations are due to start next week, expected to take four weeks to complete. The information we gather from this work will be essential as we work towards a permanent solution. Unfortunately, these works will be disruptive and I hope residents will bear with us and appreciate that it is a vital part of moving us forward."
(LM)
