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Waitohu Stream

Waitohu Stream

Updated 28 June 2019 12:26pm

Greater Wellington maintains the channel capacity in the Waitohu Stream from the coast up to Ringawhati Road. Maintenance activities carried out by Greater Wellington include removing obstacles from the channel (such as trees), where we have physical access. Erosion repair is the responsibility of the landowner, although we are happy to provide advice on request.

Flood Hazard

Flood hazard maps can be found on the GWRC GIS flood Hazard Areas page, or on the KCDC GIS flood extents page.

Floodplain Management Plan and Stream Study

The Waitohu Stream is included as part of the Otaki Floodplain Management Plan. This plan was endorsed by Council in 1998, and for more information you can download the Otaki Floodplain Management Plan itself.

In addition to the floodplain management plan, in 2006 GWRC commissioned a further study of the Waitohu Stream, and to learn more about it you can read the Waitohu Stream Study.


Greater Wellington’s operation and maintenance activities in the Waitohu Stream are carried out under consent.

Cutting the Stream Mouth

The Waitohu Stream mouth moves naturally and this can cause dune-erosion and upstream flooding.  On occasion the mouth of the stream is 'cut' mechanically.  GWRC commissioned a comprehensive assessment of the stream mouth dynamics in 2010, creating the in-depth Waitohu Stream Mouth Cutting Guidelines & Management Review.  For a snap shot of why and when we cut the mouth, download our Waitohu Stream Mouth Cutting Information Sheet.

Gravel Management

Gravel is currently extracted from the Waitohu Stream between the Taylor Road Bridge and State Highway 1. Find out more about the latest assessment of changing stream bed by reading the Gravel Management Review and Recommendations for Waitohu Stream.