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One Tree Point Erosion Protection Investigation - Community Consultation

 
This page contains information about getting feedback from the community to ensure we get an accurate understanding of what is important to the One Tree Point community.
Updated: 6/11/2018 9:38 p.m.

Council’s Policy

Whangarei District Council’s Coastal Erosion Protection Policy is to undertake erosion protection works only where necessary to protect community infrastructure or assets, and/or public health and safety on Council owned property, where there is significant benefit to the public.

There are circumstances where Council may support erosion protection works by community or other groups or provide through targeted rates. 

Background

The One Tree Point area is surrounded by steep banks and cliffs that lead into the harbour.  There are currently multiple seawalls in varying conditions along the length of the coast.  There are also areas where no seawalls or erosion protection have been considered or constructed. 

In the past, much of the work done on erosion protection in this area has been ad-hoc and dis-jointed, with Council focusing on individual areas that pose the most immediate problems.  We would like to change that, by considering the area as a whole (4.3km of coast line), by agreeing the most appropriate designs for various sections and then prioritising what sections will be focused on in the coming years.

The Investigation So Far

The first step to developing this long-term approach was an investigation into the erosion protection options for similar sections.  The investigation process involved;

  • Surveying and assessing the coastline splitting into areas (Map 1),
  • Investigating the erosion protection options available for each section, and
  • Scoring each area based on different criteria to develop a list of priorities.

You can download and read the full report (link below).

Investigation and Optioneering Report [pdf: 26mb]

Prioritisation

The Values

The values we used to prioritise the areas were;

  • Public Health and Safety: The level of public safety risk
  • Protection of Community assets: The potential for loss of Council owned land and/or community assets.
  • Providing Amenities, Retaining Access and Open Space: The ability for the public to use the coastline and beach areas to walk and enjoy themselves.
  • Significant Landscape Feature: Along the western end of One Tree Point there are sections designated by the Northland Regional Council in their Regional Plan as ‘Significant Landscape Features’ that should be protected and retained.
  • Cultural Significance: There are sites / areas along the coastline that have cultural significance that should be protected and retained.

The Results

Through the consideration of all these values, it was determined that the following areas are high priorities;

Area 3: Karoro Road Cliffs have a Very High Priority, followed by

Area 1: Pyle Road West Timber Seawall,

Area 5: One Tree Point West and;

Area 13: Marama Place. 

The maps show the locations of each of these areas and options available (link below).

Area Maps [pdf: 4.75mb]

The Options

Area 1: Pyle Road West Timber

The investigation determined that the only viable option for this section is to remove the existing timber seawall and replace it with a rock revetment all (see images at the end of this document.).

Council has determined that this will be the first area of focus as the solution has been determined and the poor condition of the existing seawall is resulting in high maintenance costs.

The detailed design and consent process will begin early 2019, with construction of the seawall planned for later that year.

Areas 3 & 5: Karoro Road Cliffs and One Tree Point West

These two Areas have been grouped together as they present similar issues that can be solved using similar erosion protection options.  Council would like to focus on these areas after Pyle Road West.

Images of the Areas, their current conditions and the possible solutions are presented in the images at the end of this document.

The options are;

Do Nothing

‘Do nothing’ to mitigate erosion and install safety signage above and below the cliff and fencing above the top of the bank to mitigate the safety concerns.

The areas are highlighted by the Northland Regional Council in their Regional Plan as ‘Significant Landscape Feature’. This option would ensure that the ‘Significant Landscape Features’ are not unnaturally modified.

Rock Revetment

Extend the revetment walls (from Areas 2 and 4) to help protect the cliffs, significantly reducing erosion and potential collapse of any sand caves.

Rock Wave Dispersion

Construct a breakwater rock wave dispersion device on the beach to provide some protection and moderately reduce the erosion. This structure would consist of 2-3 rows of rocks placed along the length of this area, covering 30-50% of the area in front of the cliff. The rock would reduce the wave energy (not eliminate it) and therefore we estimate it would reduce the erosion of the soft sandstone cliff in the order of 50%, while maintaining the ‘Significant Landscape Feature’.

Area 13: Marama Place

The existing old pipes and tyres have been removed and the remediation plan is to extend the rock revetment seawall and footpath that currently ends on the eastern end of this section. 

Community Feedback

The next step is consultation with the community. 

We would like to get feedback from as many people as possible to ensure we get an accurate understanding of what is important to the One Tree Point community.  To help with this, you have three options for getting your thoughts to us;

  • Complete a hardcopy form available from Council's offices at Ruakaka and Forum North, Whangarei and use the supplied envelope to post it to us, or
  • Download and complete the PDF form available (link below) and follow the instructions at the top of the form, or
  • Attend our community consultation meeting on Saturday 1 December 2018 from 9am to midday at the One Tree Point School to give us your feedback directly.

Feedback Form [pdf: 62kb]

Your response should reach us by 4:30pm on Thursday 20 December 2018 to ensure it is included in our final report.

At the end of the consultation period, the feedback will be collated and will be considered when we finalise our list of priority areas and the erosion protection option we will seek resource consent for.

Resources

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