The province's Department of Transportation and Works says blasting is required to ensure the stability of the rock wall.
A landslide in the Northwest Brook area east of Clarenville forced the closure of the highway.
RCMP say officials were clearing rocks and debris away on Sunday.
Traffic has been rerouted through Ivany's Cove.
Clarenville is about 190 kilometres northwest of St. John's, N.L.Suggest a correction