CLIENT:

Environment Canterbury

Contract Period:

Mar 2019 - June 2020

CONTRACT VALUE:

$515k

Te Auriri Wetland


SCOPE:

  • Bulk earthworks to create the wetland body
  • Construction of wetland diversion channel from Halswell River
  • Construction of inlet & outlet structures
  • Fish salvage from existing back channel
  • Dewatering and watering to control wetland water level to allow planting
  • Placing of rock armouring 


DESCRIPTION:

This project involved the construction of a restored wetland at Motukarara. 27000m3 of bulk earthworks were undertaken to form the new wetland basin, islands & forebay.


An old back channel of the Halswell River was drained following fish removal by a fish salvage team. Once drained the channel was cleared & deepened to allow water flow from the river the the wetland. New precast concrete inlet & outlet structures were installed. 

Grant Hood Contracting maintained a presence on site to control water levels while the landscaping contractor undertook planting.


RESOURCES:

  • 30T Loader
  • 30T Dump Truck
  • 30T Digger
  • D6 Dozer with GPS Control
  • A variety of pumping equipment