How much it will cost to remedy Alpine Aqualand's injury-causing fast-speed hydroslide, and who will pay, is still be determined.
The the Queenstown Lakes District Council is awaiting an independent review of the slide.
The slide remains closed to the public, following a discussion with the Department of Labour last week.
A Queenstown woman in her 20s reportedly received a minor concussion and injured her shoulder on May 17, and complained to the department.
The slide was temporarily closed last December, after Lakes Leisure confirmed 69 patrons received "minor injuries" since the $18 million complex opened in May, 2008, 51 of them while breaking safety rules.
Department of Labour external communications adviser Eric Janse van Rensburg, of Wellington, said the investigation was ongoing and he could not say when it would be completed.
He confirmed the slide was closed voluntarily by operator Lakes Leisure.
"The Department of Labour has not received any other complaints, but we understand there have been a number of injuries," he said.
Council spokeswoman Meaghan Miller said issues with the slide were identified within its one-year warranty.
It was likely the independent review will be made public, subject to any issues of commercial sensitivity, she said.
Engineer and designer Gary Wenck, of Brisbane-based consultancy Leisure Engineering, was engaged by the council to conduct the review.
He inspected the slide on June 5 and talked with various parties involved.
Mr Wenck collected plans, tested the slide and studied the wear patterns inside the tube where patrons had ridden.
He will file his draft report with the council and parties will have the opportunity to comment before it is finalised.
Lakes Leisure facilities general manager Cam Sheppard said the problem appeared to be in one corner of the slide.
However, he could not say yet if the section would be rebuilt, or if the slide would be redesigned entirely.
Leisure Engineering also reviewed the 16m high prototype "super fast" hydroslide at the Todd Energy Aquatic Centre, in New Plymouth, after a 45-year-old woman was taken to hospital with a concussion and head cut, last December.
The incident occurred before the slide opened to the public.
The slides at Alpine Aqualand and the Todd Energy Aquatic Centre were both designed and manufactured by Aeromarine Industries.
