QLDC infrastructure services general manager Mark Kunath said work was continuing at the site of the estimated 10 to 20-tonne rock fall, which cut off road access to Treble Cone skifield and the Matukituki Valley gateway to Mount Aspiring National Park on Sunday.
The road is now open to two-way traffic with a 30kmh speed restriction, Mr Kunath said.
Council contractors used explosives to break up the largest rocks, before earthmoving machines pushed the debris into Lake Wanaka, as part of the road clearance efforts, he said.
Four cars and their occupants were left stranded on the other side of the rockfall until one lane was opened on Sunday afternoon.
A helicopter with a monsoon bucket was deployed to clear loose rock on the bluff above the road before the road was reopened.
Further work would be carried out by council staff and contractors this week to check stability at the site, Mr Kunath said.
A geotechnical inspection would also be undertaken by a consultant "later this week", Mr Kunath said.
Meanwhile, road users should anticipate a reduced speed limit and further traffic delays on the road this week, he said.
Treble Cone skifield remained closed yesterday, after rain and warmer spring temperatures affected the mountain's snow pack.
The skifield's daily snow report yesterday said there had been a lot of heavy rain to high levels on the mountain overnight.
"We need to wait for the snow to dry to out and the water to drain out a bit before it is safe to ski," Treble Cone operations manager Rosco Davies said.
Cooler temperatures and new snow were forecast for yesterday afternoon.
