Environment, Local News

Wekatahi and Marawhara Steams

0 Comments 06 November 2014

The Wekatahi and Marawhara Steams have joined again.

In March 2013 the Waitakere Ranges Local Board agreed to put trigger points in place that monitor the need to retrain the Wekatahi and Marawhara Streams.  The trigger points were determined by Auckland Council Coastal Management Services and Local & Sports Parks West, and allow for short-term movement in the stream and dune profiles, while also retaining a significant dune buffer against potential storm impacts.
The streams have meandered south again and have now reached the respective trigger points.  Consequently, realignment works to retrain the two streams into separate channels will be required in the near future.
Auckland Council intends to carry out retraining works prior to Christmas to avoid works during the busy summer period and prevent the potential loss of the protective dune buffer to the South of the two streams.
The retraining works will involve the creation of two new channels for the streams to exit directly to the sea.  These works will be similar to those carried out in 2012 where the sand removed to create the new channels will be used to infill existing channels. The intent this time is to deposit more sand between the streams in order to shift the stream merge point seaward over time and potentially avoid future retraining exercises.
In accordance with coastal management best practice, the minimum physical works will be undertaken to achieve the realignment. Works are predicted to take approximately 5 days.
If you have any queries regarding this project please contact Kaitlyn White on 09 3010101 or e-mail kaitlyn.white@aucklandcouncil.govt.nz

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