Christchurch Northern Corridor






CNC Alliance


Mackenzie Watt

Technical Sales


The CNC Alliance is a project that is being designed and built by a group of companies. The idea of it is that you bring these people or organisations together to construct something that’s got some unique features, and where there needs to be a bit nimbleness and a bit of collaboration.

There’s around 160,000m2 of the high strength woven geotextile being used on the project. There’s also woven geotextiles being used for embankment stability both in the construction case and also the seismic case for stability.

Traditionally, high strength woven is ordered in standard roll lengths. This results in a high percentage of wastage as you cut standard roll lengths to suit the embankment widths on-site. What we came up with Cirtex, through the tender process is they were able to stitch the designed lap-lines into the rolls, so from a design/quality perspective the designers were able to come out to the site, and they were able to assure that we were meeting design specification.


We estimate we saved through working through a waste minimisation process between $50k – $100k across the whole basal order for the project. We were able to utilise a really positive constructive working relationship with Cirtex.

–  Reuben Saathof, CNC Alliance Zone Manager

For us on this project, the overall outcome is time savings, which ultimately translates into cost, but I think as well, just the willingness and desire to actually sit down and work with our team, really personable, approachable people, for me that’s what I really appreciate.  I think the strengths in my mind were multiple, undoubtedly first up was people, they’re there to listen to you and go away and work on a solution.

–  Edward Husband, CNC Alliance Project Director

Project Video

Products used in this project

Geoter PET Basal Reinforcement Geotextile

Geoter is especially designed for reinforcement of embankments on soft soils, road foundations, and supporting structures, fills and slopes.