Stage 1 – pile installation

The first stage of repair of the main slip is to stabilise the remaining road by installing concrete piles beneath the road and anchoring these into the underlying rock.

Around 20 of 49 piles up to 20m long have now been installed.

We expect to have this stage of work complete early in the new year.

We acknowledge the impact the road closure is having on local communities and businesses and are working as quickly as possible - 20 hours a day - to complete repairs.

Holiday opening details

The state highway through Mangamuka Gorge will be open from the weekend before Christmas to Sunday 10 January 2021. We will provide more exact timing in the next update.

Only light vehicles – vehicles requiring a class 1 driver licence and motorcycles – will be allowed through.

More information on class 1 licences

The road will be down to one lane in places and traffic management will be in place, including traffic lights at the main slip site.

Heavy vehicles such as trucks and buses must continue to use the detour route via State Highway 10.

Slip 7, near the main slip on the northern side of the gorge

Other slips

We are beginning work on the various other slips through the gorge, but should be able to provide two-lane traffic flow past most of these during the holiday period.

The exception will be slip 7 (pictured) at the northern end of the gorge. Traffic management will be in place at this site.

FAQs added to our webpage

Why are repairs taking so long? Why can’t vehicles go through in convoys?

These and other frequently asked questions have been added to the Waka Kotahi website at www.nzta.govt.nz/mangamuka.

More information

For more information on the SH1 Mangamuka Gorge slip repairs, contact us at northlandproject@nzta.govt.nz

Visit our website www.nzta.govt.nz/mangamuka