Washed-out Coast highway to reopen

A washed-out West Coast highway will reopen tonight after being closed for six days.

State Highway 6 has been closed since January 2 after a 10m section of the approach to the single lane bridge near Harihari was washed away in heavy rain.

The gap subsequently increased to 40m.

It severed communications to South Westland and disrupted travel and freight deliveries.

New Zealand Transport Agency (NZTA) West Coast area manager Mark Pinner said the washed-out section would reopen early this evening, some 18 hours ahead of its scheduled reopening at noon tomorrow.

"This is fantastic news for the Coast and it's great to be able to restore a link that's so important to the communities much earlier than we had planned.

"Our contractors have worked bloody well to reconstruct the washed out section of the highway, and tests this afternoon to check the safety of the bridge spanning the Wanganui River have been successful."

Contractors, many from Greymouth, have been working 15-hour days to reopen the vital tourist and truck route.

Mr Pinner said the cost of the work was more than $1 million.

The repairs are temporary, and drivers would need to use the section of highway with care, although there are no size or weight restrictions on vehicles.

Contractors had to divert the river's floodwaters away from the washout on the northern approach to the bridge before they could start rebuilding the highway.

The process of restoring the road involved building up layers of stone and gravel to get to the level of the bridge. About 100,000 cubic metres of gravel and stone had been used, in addition to 6000 tonnes of rock, and Mr Pinner estimated more would be needed.

Work on the abutment was completed yesterday, although Mr Pinner said it had been a slow process as they needed to be careful while doing it.

He said the NZTA would look at rebuilding the bridge, while more rocks would be placed upstream to try to keep the river within its channel in future.

Mr Pinner said the closure had been frustrating for locals, and the early opening was the best way to say thanks for their support and patience.

- APNZ and the Greymouth Star