Kaiapoi River Navigation Channel Dredging

Dredging has ceased for 2019, it will restart in winter 2020.

Map highlighting areas of Kaiapoi River to be dredgedSix locales of the Kaiapoi River are to be dredged between the Waimakariri confluence and the Williams Street Bridge.

Smith Crane and Construction will use a state-of-the-art Bell 250 cutter-suction dredge operated from a sectional barge for this work.
The excavator mounted dredge generates significantly less sediment than conventional dredging methods.

The dredge pipe, will float to land where it will discharge material to settling ponds at Corcoran Reserve.
The settling ponds separate the silt from the water and the filtered water will then be pumped back into the Kaiapoi River.

Once the dredging has been completed at the marina basin area near the Kaiapoi Bridge, a new pontoon is to be installed alongside the Riverview Terraces. Channel Dredging Location Map for Kaiapoi River Marine Precinct

Please take care around the work site and follow all directions from site workers.


To allow for working equipment movements, the Coastguard and Askeaton boat ramps will both close for short windows during the work period. Kairaki Ramp will be the alternative launching ramp during these periods. Closure dates will be advertised closer to the time.

Walkways will remain open.

For more Information, contact:

Duncan Roxborough
Implementation Project Manager - District Regeneration
0800 965 468 (0800 WMK GOV)

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