Turoa ski field's main chairlift is out of action for the rest of the season.
The lift's rope was damaged in an avalanche last week, and analysis by experts has confirmed it needs to be replaced.
The avalanche was triggered at about 8:30am on Monday August 6, closing the upper mountain ski areas.
Ruapehu Alpine Lifts chief Ross Copland said 250 metres of new rope is needed and it could not be supplied in time to get the lift up and running in the 2018 season.
"It would need to be flown out from Europe and that whole process could not be completed before the end of the winter," he said.
There are seven other chairlifts on the Turoa skifield, meaning much of that side of the mountain will still be accessible for the remainder of the season.