The Dunedin City Council yesterday confirmed the road would be closed from Monday until October 20, to allow extensive slip repair work to be carried out.
A section of the road began to move when a historic slip was activated by heavy rain last July, and the council introduced overnight closures in November after monitoring showed the movement had increased.
Yesterday, council transport delivery manager Josh von Pein said work to repair the slip was expected to take five months and cost an estimated $750,000.
The council's contractor, Downer, would excavate the existing slip along a 40m section of the road, to a depth of 3m, and install drains to remove water from the area, before reinstating the road, Mr von Pein said.
The slip was "one of the bigger" projects the council had to tackle following last year's sometimes wild weather, he said.
The Brick Hill Rd slip was not threatening homes, and the immediate neighbours, living on either side of the work site, would still have access to their homes, Mr von Pein said.
