Battle to protect 'absolutely critical' Wairarapa coastal road

The battle to protect South Wairarapa’s most vulnerable coastal road takes a major leap forward this week.

Work has started on the extension of the EcoReef system at Whatarangi on Cape Palliser Rd, as part of a wider programme to strengthen coastal resilience along the vulnerable stretch of coastline.

A portion of the road has been reduced to one lane since May 2025, when heavy swells damaged the northern section.

The EcoReef system consisted of interlocking hexagonal modules filled with aggregate, forming a robust and adaptable structure that replaced traditional rock armouring, which could be prone to displacement during storms.

The 620kg fibre cement blocks, now called HEX-LOC, were the brainchild of engineer, farmer and inventor Fred Waiker, who has a farm in Cape Palliser.

The Whatarangi project would extend the existing structure by 96 metres, including 75m along the northern section and 21m along the southern section.

It was expected to take about two weeks and comes at a time when the South Wairarapa District Council has presented a business case for continued government funding for capital works along the route.

Cape Palliser Rd is currently classified as a Special Purpose Road due to its cultural and tourism value and high on-going maintenance costs.

However, this special status would be removed nationwide in June 2027, leaving a funding hole of up to $35 million over 10 years.

South Wairarapa Mayor Fran Wilde said the EcoReef work was a significant step forward in protecting the vital connection for South Wairarapa communities.

“This section of Cape Palliser Rd is absolutely critical for residents, businesses, and visitors. Strengthening it against ongoing coastal erosion and extreme weather is a priority for council,” she said.

Cape Palliser Rd is an important transport link, providing the only formed access to Ngawi and surrounding communities, as well as supporting visitors who travel to the attractions of Cape Palliser.

Coastal erosion and increasingly severe weather events continue to place pressure on the infrastructure, leading to closures and costly repairs in recent years.

Wilde said the EcoReef approach reflected a smarter, more sustainable way of managing the coastline – and had the added benefit of being able to be produced in Wairarapa.

“This is an innovative solution that not only helps protect the road but also works with the natural environment. It’s about building resilience for the long term,” she said.

The design of the EcoReef system was expected to encourage colonisation by marine life, enhance biodiversity, and reduce the need for ongoing maintenance, while minimising impacts on the surrounding coastline.

The Whatarangi extension was the first of four planned sites in a broader programme of works that would result in EcoReef structures being extended or installed at locations along the Cape Palliser coastline, including Turners Bay, the Pinnacles, and Te Kopi.

– LDR is Local Democracy Reporting, local body journalism co-funded by RNZ and NZ on Air