The Tunnel Beach walk has been closed since October last year when a major storm caused 10 large slips, making the track impassable.
It had been hoped the track would be reopened in the middle of this year, but the Department of Conservation said it was waiting on a geotechnical investigation to be completed.
Doc Coastal Otago acting operations manager Samantha Marsh said it was considered necessary because it would guide the repair works and ensure the track was safe and resilient for visitors in the long term.
Mrs Marsh said the investigation was now complete and repairs would be done in two phases.
"Firstly, we are focusing on getting the track safely reopened for the summer by removing slip material, restoring the track surface, and opening existing drainage which was covered by the slip.
"Native planting to help stabilise the area will also get under way."
The first phase of repairs was expected to be completed in November.
After the busy summer season, more work would be done to upgrade the water management around the track, along with new seating and information signs.
While the track may be closed for periods during phase two, the work would help protect the track into the future, she said.
"In the October storm, a single weather event caused multiple slips across the track.
"To keep people safe and ensure repairs last the distance, we needed a comprehensive engineering solution.
"This is especially important as we adapt to a changing environment where extreme rainfall events are expected to become more common."
She thanked the public for their patience and understanding over the past 10 months, while the repair work was planned.
The walkway is used by more than 150,000 people each year.
"We know people love this walk, which is close to Dunedin and very scenic.
"We’re looking forward to completing the track and fully realising the vision of the project."
The upgrade is being done in collaboration with Ōtākou runaka, the Dunedin City Council, Aukaha, and other stakeholders, she said.
