Waka Kotahi NZ Transport Agency

SH25/SH25A Thames-Coromandel

7 February 2024


Recovery works to resume across Coromandel’s highways

Our work programme to repair damage caused by last summer’s extreme weather across Coromandel’s state highway network ramps up from mid-February.

From mid-February teams will be working with stop/go traffic management in place at up to six locations around the peninsula, and from mid-March at up to 10 locations. Work will also be carried out on SH2 in the Karangahake Gorge and SH27 at Kaihere.

These works will mean delays for road users, so plan ahead and allow extra time for your journey.

While SH25A was closed last year, work across the wider Coromandel highway network was carefully managed and sequenced to minimise further disruption to peoples’ journeys around the peninsula, says Regional Manager Infrastructure Delivery Waikato/Bay of Plenty, Jo Wilton.

“We also paused all but essential activity over the busy summer holiday period to minimise disruption and give Coromandel residents and visitors a break from recovery works.

“Now the peak summer holiday period is over, and SH25A is carrying its usual volumes of traffic, motorists will see our teams working at numerous sites on SH25 around the peninsula.

“We understand this will mean delays for road users and thank them for their patience. Coromandel’s highway network remains vulnerable because of the unstable natural environment, and exposed coastal areas. Repairing the remaining damaged sites as quickly as possible is essential for ensuring the resilience of the Coromandel.”

The region is benefiting from these works with local suppliers being used where possible.

Last summer’s storms resulted in 50 major slip sites as well as surface flooding related damage at multiple locations across the Coromandel highway network, leaving it in a fragile state. During 2023 work was completed at 32 sites along SH25 and SH2. Our teams also prioritised work on SH25A while it was closed to ensure the entire corridor is safe and more resilient.

Traffic on SH25A quickly returned to usual following the reopening of SH25A. Traffic data shows average daily vehicle numbers during the peak holiday period of around 7300 a day – the usual number for that busy time of year.



SH25 Whiritoa to Whangamata – planned works

SH25 will have daily periodic road closures from Wednesday 7 February between Whangamata and Whiritoa, south of Parakiwai Quarry Road.

Our teams will be resurfacing the road through this area. We expect this work to take about two weeks to complete, weather permitting.  

The road will be closed for up to 30 minutes at a time between 7.00 am and 6.00pm, then reopened to allow traffic to clear.

The road will reopen to two lanes of traffic overnight and on weekends under temporary speed limits.



Ruamahunga – rolling closures 9 February

State Highway 25 will be fully closed for short periods on Friday 9 February, so a helicopter can safely operate over the road.

The road will be closed for up to 20 minutes at a time as the helicopter lifts equipment and materials to the top of the slope and brings down trees that have been cleared. After each closure, the road will be reopened to allow traffic to clear before the next closure.

This work is weather dependent and if the weather is unsuitable, this will be postponed.

Work here is expected to continue until mid-2024.



Recovery and other works underway in February

Work underway to repair an underslip at Wharekaho, has so far been tackled off the road, from the bottom of the slip to avoid impacts on traffic. From 12 February the side barrier will be moved, reducing the road to a single lane so allow work can be done on two fronts.

Work is also expected to begin at the following locations in the week beginning February 12th:

Te Kouma Hill – repairs to under-slips at two locations 
Kereta Hill – repairs to underslip
Pumpkin Hill - drainage improvements.

Each of these locations will be reduced to a single lane with stop/go traffic management in place.

Other work underway around the network includes side barrier installation at two locations between Whenuakite and Tairua, with work expected to begin after Waitangi Day. The work will require traffic management and should take 10 days to complete.



Finishing the job on SH25A

Our project team is back on site to finish works at SH25A Taparahi. They have removed temporary bracing under the bridge deck and are finishing drainage infrastructure and earthworks. They are also testing the soil nails and progressively dismantling and removing site offices, fences and gates. Once that is complete the material storage area and helipad will be reinstated. There is a temporary speed limit in place to keep our team safe.



Respect our roadworkers

Roadworkers, like Tuterangi Waienga (pictured) are out there making Coromandel roads better and safer this summer. They are carrying out important maintenance such as repairing potholes and resealing.
Summer is the best time for maintenance such as road resurfacing because the warmer and drier weather helps new seal stick to the road surface.
Be patient, respect road workers and travel safely through their worksites. Stick to the posted speed limit, drive carefully and follow any signage and instructions you receive.
For information about work impacting state highways around the region visit journeys.nzta.govt.nz/traffic.



More information


For more information on the SH25/SH25A Thames-Coromandel project, contact us at coromandel@nzta.govt.nz

Visit our website www.nzta.govt.nz/thames-coromandel