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Work begins on SH1 Maromaku slip repair


Work will begin next week (16 March) to repair the 70-metre section of State Highway 1, south of Kawakawa, where flooding last July caused a significant slip, closing the highway for seven days and requiring a temporary route to be built.


The NZ Transport Agency has just completed its geotechnical investigations and awarded the 18-week contract to Fulton Hogan.

The Transport Agency’s Acting Auckland and Northland Highway Manager Mieszko Iwaskow says the repair will involve moving more than 3000 tonnes of material to build a stabilised-earth retaining wall with 39 reinforced concrete piles, driven 21 metres into the ground.

“We will also install additional drainage at the base of the retaining wall to help stabilise the slope.”

Mr Iwaskow says the highway will be rebuilt along the existing alignment and barriers installed to improve safety.

“We will need to reduce the highway to one lane to complete some of this work but these closures will be limited to the weekend to minimise any disruption to travellers.

“We apologise in advance for any disruption to people’s journeys and thank everyone for their continued patience as we complete this work before the start of winter,” he says.

Jan McCarthy 
Media Manager
NZ Transport Agency
T: +64 3 964 2885
M: +64 21 427 442

The NZ Transport Agency works to create transport solutions for all New Zealanders - from helping new drivers earn their licences, to leading safety campaigns to investing in public transport, state highways and local roads.