A slip at the end of November, 2012, at Orere Point, one of a number of slips caused by sea erosion along the road, reduced it to a single lane.
Waitaki District Council roading manager Michael Voss said yesterday the work to protect the base of the underslip at Orere Point was just one section of the road being repaired and more had yet to be finalised.
Council contractors SouthRoads started work recently to place rock to protect the base of the Orere Point slip.
Work using a digger to place rock would depend on tides.
The single lane and a temporary 30kmh speed limit had been in place since the slip.
The sea had undermined the road to the edge of the seal and it was no longer safe to keep two lanes open.
The slips along the coastal road are posing the council a challenge in finding suitable solutions to stop the damage.
''We had another slip earlier this month on a section of Beach Rd north of Kakanui which has resulted in us constructing temporary fencing,'' Mr Voss said.
Specialist geotechnical engineers were investigating the slip, including abseiling down its face on Friday, to provide advice and help identify solutions.
In May, an earlier slip occurred on Beach Rd, causing a section of the road to be reduced to one lane.
''We are negotiating with a landowner to buy some land so the road can be moved inland and further away from the coast and the damage being caused by rising sea levels and erosion.''
Coastal erosion posed challenges for maintaining the coastal road in a way that was both sustainable and did not place too high a burden on ratepayers, Mr Voss said.
