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Nothern Corridor Improvements (NCI) - Auckland

Fulton Hogan & HEB Construction
Jacobs & WSP Opus


Products Used

SiltFence, Super SiltFence, Barrier Mesh, Steel Y Posts,
and Safety Caps

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The Northern Corridor Improvements (NCI) project aims to facilitate interregional travel between Auckland and Northland by building a new motorway connection between State Highway 1 (Northern Motorway) and State Highway 18 (Upper Harbour Highway). The project will also create a new and reliable service for public transport users, walkers and cyclists alleviating congestion and supporting future economic growth. Before starting any sort of ground preparation or earthmoving, the always required SiltFence and Barrier Mesh products had to be properly installed.


Over the years, Cirtex has become the go-to company in major infrastructure projects regarding Erosion & Sediment Control products and services. At NCI our vast range, good quality, and industry knowledge facilitated the contractor alliance to ensure the project got off on the right foot. Since the very first day, our E&SC specialist was pro-actively on-site solving problems and delivering the right materials; SiltFence, Super SiltFence, Barrier Mesh, Y-posts, safety caps, pins, among other products, which allowed the contractors to establish the site and generated a safe working environment


In total thousands of metres of SiltFence and Barrier Mesh were built in different areas of the project, requiring a large number of caps and Y-posts,
which sizes ranged from 0.5 metres to 2.4 metres in height.
The product installation went smooth as the contractors were using the rights tools, for instance Y-post drivers, and relied on experienced 4-man crews able to raise more than 20 linear metres of SiltFence and Barrier Mesh per hour.

Super SiltFences were also used as they provided extra impounding and settlement catchment, working better in steep slopes or under larger pressures.

The products used provided the following benefits to the project:

Products used in this Project


Barrier Mesh

Cirtex® rigid Barrier Mesh is a highly visible orange mesh designed to withstand harsh conditions.



SiltFence is a woven geotextile consisting of strong, rot resistant, chemically stable long chain synthetic polymer materials, dimensionally stable with each other.


Super SiltFence

Super SiltFence is the combination of a double layer silt fence material supported with a galvanised wire mesh.