After the helicopter arrives in the area, the road between T Anao and Milford Sound is now open to allow workers to work to avoid the avalanche last night.
State Highway 94 reopened tonight at 12.30 p.m. It has been closed since last Thursday due to the risk of avalanches.
Helicopters were allowed to fly in the area after a break last season, said Waka Kotahi Kevin Thompson, manager of the Millford Road Alliance.
“We had a small window last evening and the helicopter was busy controlling the explosives,” he said.
The crew had already taken steps to clear the avalanche in the area and now the road has been cleared.
Climate change has also reduced the risk of avalanches.