Roading manager Tim Langley said six stretches of road needed repairs but reinstating the sections which had lost the lane, both of them near the Department of Conservation station, were a priority.
Work on those sections had already begun and it involved reinforcing the road's sub-base with heavy-duty filter fabric and cement stabilised aggregate.
Mr Langley expected that particular chunk of the roadworks to be completed by early next month and the aim was to have all parts of the road fully reinstated by October.
"But that will be subject to weather, with no more major events to hold us backwards."
Because of the threat future coastal erosion posed, more resilient works had been suggested for the road and the council would look at finding the funding, Mr Langley said.
"We can't fund it all at once so it's got to be a staged process and we're working within the current resource consent."