Silt Control

Super silt fence does the same job on steeper ground or larger catchments, where a standard fence would be overwhelmed.

We install silt fence where sheet flow needs intercepting, on low-gradient or confined sites with small contributing catchments, around watercourses and short batter fills, to delineate the limit of disturbance around riparian margins and bush reserves, where an earth or topsoil bund would damage sensitive ground, and to hold debris and soil back from watercourses, critical areas and streets.

Installation matters as much as specification. A fence set at the wrong height, trenched too shallow or run across a contour it cannot handle gives false assurance and fails at the first real rain. We install to GD05 standard, machine or manual depending on the ground, and we achieve over 100 metres a day.

They come in custom lengths for any application, and we can manufacture them on site to fit the job — which matters when the thing you need is a 40 metre run around an irregular inlet rather than three standard lengths butted together.

It is how a site deals with the fraction that will not settle on its own. In clay soils that is most of it — clay particles stay in suspension almost indefinitely, which is why a pond that looks like it is working can still be discharging dirty water.

We supply and install dosing stations sized to the site, including automated rain-activated devices that treat when a rain event starts rather than when someone remembers. We work alongside experienced engineers and suppliers on the treatment design.

Flocculation aids filtration, reduces the sediment leaving a site, protects receiving waterways and is often what makes a consent condition achievable.

They are the answer where silt fencing is not appropriate — larger catchments, steeper ground, or where runoff needs flocculant treatment before it can be discharged. Sizing, decant rate and maintenance schedule all follow the catchment and the consent, and getting the sizing wrong is not recoverable once earthworks are underway.

We construct DEBs and sediment ponds before major earthworks begin, so the controls are in place and working before the ground is opened up.

The range runs from silt fence fabric through coir and coconut fibre blankets to reinforced synthetic mesh, and each product has a specific application, a set of advantages and a set of limitations. We work across the range rather than carrying one product, so the recommendation follows the site.

Installation decides whether matting works. The right anchor trench, the right overlap and the right pinning density for the slope will hold ground that would otherwise move. Loose or under-pinned, it lifts at the first event and takes the surface with it.