Source: Auckland Council
Auckland Transport re-opened Pine Valley Road in Dairy Flat late last year after a three-month closure to fix an 18-metre slip and damage to a culvert sustained during the severe weather events of early 2023.
The road reconstruction work began in September 2024 near 257 Pine Valley Road, and the road was closed to all but residents with traffic detoured via Kahikatea Flat Road and Dairy Flat Road.
An 86-metre block retaining wall has been built on the southern side of the road and a large box culvert replacement installed to re-route stormwater beneath the road.
Project Manager Jay Badenhorst says the scale of the project meant the road needed to be fully closed for safety reasons and to complete the works efficiently with minimum cost.
“Construction crews worked six days per week for up to 12 hours per day to complete the works and reconnect Pine Valley Road before the end of year holiday period,” he said.
“I’d like to issue a big shout out to the team that delivered this exceptional work and thank you to the Pine Valley Road residents and the surrounding community for their patience.”
More than 3000 tonnes of soil was removed during the excavation of the roadway and existing culvert and 15 sheet piles were installed to support a 500+ block Magnum stone wall to support the damaged road.
A 2.5m x 2m longbox culvert was then built six metres below the road to direct water from the southern to the northern side of the road, and to prevent erosion and maintain road stability.
Large stones called riprap now protect the embankment by deflecting water energy and stopping soil erosion, and power and internet services relocated during the build have been reconnected.
The Pine Valley Road reconstruction work is one of more than 800 significant flood recovery projects being managed by AT since the 2023 severe weather events. Find out more on the Auckland Transport website.
