Sediment & erosion control

We worked extensively to control sediment in danger of being washed away by rain to mitigate any potential effects on the freshwater and marine environments of the Mahurangi and Pūhoi Rivers and their tributaries.

Exposed areas of land where work was undertaken was managed to ensure sediment generated was kept to a minimum. 

Earthworks were staged and monitored to determine when those areas could be stabilised by landscaping and plantings. Exposed areas were progressively stabilised as work moved along the site. 

Where sediment was generated, a number of measures were put in place, including ponds where the sediment could settle and be contained, silt fences (fine mesh screens), and diversion drains and earth bunds (land contours which diverted fresh water flows away from exposed soil).

A dedicated team of environmental professionals was deployed in the field to monitor all these measures and Auckland Council was involved in regular monitoring to ensure the desired standards were met.