Proposed District Plan Changes 22 to 25 and Variations 2 to 8

Improving the management of stormwater

North Shore City Council is currently considering options to improve the management of stormwater throughout the city.

The proposed plan changes and their associated variations were publicly notified on 12 April 2007. Submissions closed on May 18, 2007. A summary of submissions is currently being prepared for each proposed plan change.

Useful links

Image of an arrow. Public notices

A number of key issues are driving these changes:

  1. North Shore City has a goal of protecting our natural environment. The current level of development in some cases threatens this goal.
  2. Three key Acts of Parliament – the Building Act, the Local Government Act and the Resource Management Act all require councils to manage their environments in a more sustainable manner.
  3. The 13,000 hectares of North Shore City receive an average 1250 millimetres of rain each year. Before humans arrived here, nature coped quite well with this rainfall. But today, one third of the city is covered by impervious surfaces. This area continues to increase every year, causing an unnatural rush of water down the natural water courses towards the beaches. This must be arrested and progressively brought back closer to the pace which nature intended.
  4. More people want to live in the city. That means more buildings, roads and paths, creating more pressure on stormwater systems.
  5. The Council’s strategy is to prevent problems from arising rather than trying to fix them once they have occurred.

The council is taking a four pronged approach to better management of stormwater and the effects it has on our city. These include:

Image of an arrow. Managing the effects of impervious surfaces
Image of an arrow. Providing a buffer between our streams and development
Image of an arrow. Avoiding development in areas at greatest risk of flooding
Image of an arrow. Better control of site works which generate sediment and other pollutants

While the issues above are addressed separately, altogether these four areas are highly inter-related and inter-dependant. Impervious surfaces will affect streams and flood areas, water running off site works will affect stream quality, and so on.

Proposed Plan changes and associated variations

Image of an arrow. Proposed Plan Change 22 and Variations 2,3 and 4 PDF Image of a PDF logo. (151 KB)

Image of an arrow. Map one PDF Image of a PDF logo. (1.34MB)
Image of an arrow. Map two PDF Image of a PDF logo. (1.90MB)
Image of an arrow. Map three PDF Image of a PDF logo. (3.53MB)
Image of an arrow. Map four PDF Image of a PDF logo. (1.32MB)
Image of an arrow. Map five PDF Image of a PDF logo. (1.32MB)
Image of an arrow. Map six PDF Image of a PDF logo. (2.33MB)
Image of an arrow. Map seven PDF Image of a PDF logo. (1.29MB)

Image of an arrow. Proposed Plan Change 23 and Variations 5 and 6 PDF Image of a PDF logo. (90 KB)
Image of an arrow. Proposed Plan Change 24 and Variations 7 and 8 PDF Image of a PDF logo. (116 KB)
Image of an arrow. Proposed Plan Change 25 PDF Image of a PDF logo. (116 KB)
Image of an arrow. Section 32 report PDF Image of a PDF logo. (335 KB)

Stormwater management practice notes

Image of an arrow. NSC 01: Stormwater Mitigation Overview PDF Image of a PDF logo. (126 KB)
Image of an arrow. NSC 02: Calculating Site Imperviousness PDF Image of a PDF logo. (133 KB)
Image of an arrow. NSC 03: Minimising Impervious Area PDF Image of a PDF logo. (117 KB)

Image of an arrow. NSC 04: Permitted Activity Route for Residential Activities in SMA 1, 2 or 3 PDF Image of a PDF logo. (126 KB)
Image of an arrow. NSC 05: Permitted Activity Route for Non-Residential Activities in SMA 1, 2 or 3 PDF Image of a PDF logo. (139 KB)
Image of an arrow. NSC 06: Permitted Activity Route for Residential and Non-Residential Activities in SMA 4 PDF Image of a PDF logo. (140 KB)
Image of an arrow. NSC 20: Single Purpose Rain Tanks PDF Image of a PDF logo. (216 KB)
Image of an arrow. NSC 21: Dual Purpose Rain Tanks PDF Image of a PDF logo. (278 KB)
Image of an arrow. NSC 22: Detention Tanks PDF Image of a PDF logo. (113 KB)
Image of an arrow. NSC 23: Bio-Retention PDF Image of a PDF logo. (383 KB)
Image of an arrow. NSC 25: Green Roofs PDF Image of a PDF logo. (127 KB)

For more information

Please contact Susan Andrews, Environmental Policy Advisor on:
Telephone: 09 486 8600
Email: Actionline@northshorecity.govt.nz

Image of the Adobe Reader logo. Adobe Reader is required view these documents, which can be downloaded free from www.adobe.com

- Areas prone to flooding
- Impervious surfaces
- Protecting our streams
- Site works