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SH1 Mangamuka Gorge slip repairs

Project update

20 December 2024



	SH1 Mangamuka Gorge slip repairs – December 2024 update Kia ora koutou, After 854 days, we are excited to announce the reopening of SH1 through Mangamuka Gorge to all road users, just in time for Christmas! To everyone involved in bringing this project to this point, including the community for your support, thank you. We are deeply grateful for all you have done. When you travel the road, you'll notice there's plenty of new sites to see. While much of the extensive repair work is hidden underground, including piles and anchors, above ground the road has a new asphalt surface, capping beams, guardrails, and a retaining wall with a beautiful mural showcasing the incredible effort workers have made restoring this vital piece of road. The summit now also features picnic tables where you can take a break and enjoy the view. From all the crew at Mangamuka Gorge, we wish you a safe and merry holiday season.


	Post-reopening work: January - April 2025 We will return on the week of January 13 to complete final anchor work on the remaining slips. The road will remain open during this period, and the team will do their best to minimise disruptions. Planned temporary traffic management, such as stop/go or traffic lights, will be in place. The work is expected to continue until April 2025. We ask that you help keep everyone safe by driving with care and taking the time to enjoy the beautiful scenery of the gorge. Slip A7 – Road surface reinstatement and barrier installation are complete. Anchor work will be completed in the new year.

Check out a special Seven Sharp segment about the project and team who have been working to get the gorge open:

Seven Sharp: https://www.tvnz.co.nz/shows/seven-sharp/episodes/s2024-e221

You can also read more about the reopening in these articles:

RNZ: Jubilation as SH1 Mangamuka Gorge road re-opens

NZ Herald: SH1 Mangamuka Gorge highway to the North fixed and open

RNZ: State Highway 1 reopening through Mangamuka Gorge



	Click the image above to watch our project wrap-up video. After 22 months of hard work, the road is restored, reconnecting communities and offering a safer, more resilient route. Behind-the-scenes project videos If you missed them over the last couple of months, check out our playlist of behind-the-scenes project video updates. These updates provide a glimpse of the project and the people behind the restoration. Check out our YouTube playlist for the latest videos, with new uploads over the past month: Mangamuka Gorge slip repairs - YouTube playlist We also have a couple of special clips filmed for the reopening of the road including a final flyover that looks at the all the work done: Final flyover of Mangamuka Gorge before the road reopens Wrapping up our work on Mangamuka Gorge



	Slip A27 – Stencil design along the completed section through Slips A12/A13/A27

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

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