River Management

One of Tasman District Council’s major roles as a unitary authority is to look after the region’s rivers and drainage systems. This section details how that work is completed.

Council maintains 285 kilometres of the region's rivers.


Gravel Extraction

Who looks after the gravel in the rivers systems?

River Works

Details of river maintenance work, including maps and a feedback form.

River Care Groups and Meetings

Details of groups and meeting dates.

Stopbanks - Responsibilities and Requirements

Find out more information about Council Stopbanks


Council Access to Rivers

When access to river bank sites is required, Council staff will work with landowners to obtain land entry agreements to cover all parties. All work related to the management of banks and fairways of rivers must be done in a legal, safe and healthy manner.

River Works and Spraying Resource Consent

A 2001 resource consent allows the Tasman District Council to be able to carry out river works within the District. Resource consent for land-based spraying of vegetation is also in place and expires in 2015.

  • Each year the general programme/timing of spray operations is advertised, usually in November.
  • Ground based spraying of river fairways is undertaken annually and the products approved for use are Roundup, Grazon and Escort.
  • A limited ammount of Aerial Spraying is now consented in the Upper Motupiko and Upper Motueka Rivers by Council.

Unwanted Organisms

Tasman District Council actively manages weed species through the Regional Pest Management Strategy.

Crack Willow

One plant that Council has moved away from actively using within our rivers is Crack Willow (salix fragilis). It is the multi leadered, gnarled willow that grows along many of our waterways. Other unwanted organisms include Old Mans Beard, gorse and broom.

For some decades, there has been a move to reduce reliance on this species and a transition to other less invasive willow species in the district's rivers.  It is now illegal to plant, propagate or distribute this species as it is on the National Pest Plant Accord due to it's propensity to propagate vegetatively downstream and clog up waterways.  The current approach is not to actively remove it but to control its spread in the classified river network through our annual fairway spraying programme and maintain it where it is serving a useful purpose.  The issue in other parts of the country with seeding willows such as Grey Willow (Salix cinerea) is yet to be proven in this district.

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