NZTA / Supplied
State Highway 73 was closed around 2 p.m. Monday after a void was discovered under part of the road during repair work.
State Highway 73 near Arthur’s Pass reopened to one lane after it closed when a “void” was discovered under the road.
Waka Kotahi NZ transport agency closed the road between Canterbury and the West Coast around 2 p.m. Monday.
“Contractors working to repair a culvert under SH73 this afternoon have discovered a void, which affects the single lane that was open to traffic during the repair work,” said network manager Jessica McFarlane.
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The road was closed at Craigieburn Cutting, north of Castle Hill and south of Pearson Lake.
The Lewis Pass (SH7) was open as an alternate route via Waipara and Reefton, but extra care was needed as all alpine roads were icy, she said.
The damaged section of SH73 required emergency work and staff were on site to carry out further investigations Monday afternoon.
“We appreciate that this is a sudden and unexpected shutdown for the daily drivers of SH73, and thank everyone for their patience as we work on this repair,” McFarlane said earlier.
The road reopened to one lane shortly after 6 p.m.
Temporary traffic lights would be in place while pavement repairs continued.