Proposed wetland FAQs

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Frequently Asked Questions (FAQs)

What is the purpose of this engagement? 

The proposed creation of a wetland at the bottom (northern end) of Cannons Creek Park opens up an opportunity for the community to highlight what they would like to see included in this space so it reflects local identity and supports sense of belonging. 

The work in Cannons Creek Park will be delivered in multiple stages. We are looking for community feedback on stage one. We’re keen to hear your thoughts about the proposed wetland and what you would like to see:

  1. Along one of the entrances from Castor Crescent into Cannons Creek Park
    (see map)
  2. In the area between the sportsfield and the proposed wetland
  3. Initial thoughts on the proposed wetland
  4. Things you would like us to think about or include when designing the proposed wetland

We’re looking to better understand how the community would like to use this new shared space and what features we should include around one of the entrances and in front of the wetland area.  

What can I influence through providing my feedback?  

There are two key areas the community can significantly influence: 

  • An accessway from Castor Crescent into Cannons Creek Park
  • The area between the sportsfield and the proposed wetland.

 We are keen to hear what the community would like to see included in these areas as part of the project.  

What are the options available to improve water management?  

We’ve looked into a variety of options that could help improve stormwater management, such as holding and treating stormwater on private properties. We are proposing to create a wetland at the bottom (northern end) of Cannons Creek Park, as this option has more recreational and water quality benefits for the community. 

Why are there only two areas that the community can co-design? 

In order for a wetland to be successful there are a list of engineering requirements that must be met. We have contracted specialists to help design and deliver a wetland that will be appropriate for Cannons Creek Park. We have also sought advice from our partners Ngāti Toa Rangatira and Porirua City Council who have knowledge of the area and what can be successfully maintained for generations to enjoy.  

The other aspect of the wetland design which requires technical design work in order to meet Porirua City Council standards is the pathways to and around the proposed wetland. In a couple of instances, there are steep banks that the team will need to work on to ensure they are accessible for park users.  

We have identified two areas (pink circles on the map) where there is not a lot of specific engineering requirements. This provides an opportunity for the community to co-design what the park might look like in these two spaces.


What is a wetland?  

A wetland is an area of land that is covered by water. They act like the kidneys of the earth, cleaning the water that flows into them. A wetland is designed to trap soil, filter out nutrients and remove contaminants.  

As well as supporting water management, wetlands can also benefit the community in other ways. Wetlands can be designed to include recreational and community benefits, such as new paths for walking or biking, as well as supporting local wildlife. 

Why do we need better water management solutions? 

Our waterways are feeling the pressure of a growing population and changes to land-use. During community engagement in 2019, the management of storm and waste water featured often, with many people expressing concern about the quality of the waterways and the pollution of the Te Awarua-o-Porirua. These concerns were backed up from a 2019 review of the quality of freshwater in Porirua (which included Kenepuru Stream) that found it to be Grade E, which is the lowest water quality grade.  

Run off from rain can cause problems for our taiao, our environment. A lot of rain falls on hard surfaces like roofs, driveways and roads and when it runs down into the drain it can carry with it dust and dirt as well as pollutants like heavy metals from old roofs and oil from our cars. 

Soil and toxins end up in our streams and harbour polluting our waterways, harming our marine life such as fish and affecting the quality of water we use for recreation like swimming or fishing.   

 We want to improve water quality for the community by improving the stormwater entering our waterways. One of the best ways to do this is through investing in water management solutions such as wetlands and pipe upgrades.   

Why might we need a water management solution in Cannons Creek Park?  

The bottom (northern end) of Cannons Creek Park is a great option to create a wetland because it is at the bottom of the catchment, so the runoff from all of the area upstream can flow through the wetland and be treated before it gets into Kenepuru Stream.  

As part of the development to the east of Cannons Creek Park, we have constructed a large pipe to divert flows from wider urban area into the wetland. This means that more of the runoff from the urban areas can also be treated through the proposed wetland area.  

 Will we lose access to Cannons Creek Park?  

Following investigation, the best place to create a wetland in Cannons Creek Park will be at the northern end, near the entrance to Bothamley Park. This work will see a small portion of the park, which often gets very wet during winter or heavy rain, turned into a wetland for everyone to enjoy.  

There will be some temporary disruption during construction, however we will minimise this as much as we can to ensure everyone can still access the main sports areas of the park.  

 How much will it cost to create a wetland? 

The Government announced in July 2021 that they would be allocating $136 Million of the Housing Acceleration Fund to fund key water infrastructure upgrades to support eastern Porirua. This includes funding to create a wetland to help improve water management.  

 How long will it take to create a wetland? 

Below is the proposed timeline for the proposed wetland.



This timeline may change depending on community and Council feedback, as well as availability of resources.

 Who will deliver the work?  

Construction and infrastructure experts Te Aranga are currently carrying out investigation work to help design the proposed wetland for the community. Once resource consent has been granted, they will also be responsible for delivering the wetland.  

Te Aranga is a partnership between Higgins, Goodmans, Beca, Harrison Grierson and Orogen. They are also supported by Fletcher and Brian Perry Civil. Te Aranga are responsible for investigating and upgrading other key infrastructure in the area as well as preparing land so Kāinga Ora can build new, warmer, drier homes in eastern Porirua.  

 Where is the draft Spatial Plan? 
The draft Spatial Plan is currently being reviewed by Porirua Development partners. We acknowledge there has been a delay returning it to the community for comment, but we are working towards this being available following later this year.  

 Why are you focusing on a small portion of the park, when further work is needed to be done in Cannons Creek Park?  
The creation of a wetland is one piece of work in a larger plan to upgrade the area. The wetland is a great way to help us to quickly address water quality issues in the area and has been funded through the Housing Acceleration Fund.   

Before we can talk about what other improvements we can make in the park, we need to finalise a series of plans for Cannons Creek which take a deeper dive into all the things we need to work on or support to enhance the area. These plans are currently underway and Porirua Development will continue to work alongside our partners to masterplan and share with the community once they’re completed. 

We’re keen to hear your thoughts about the proposed wetland and what you would like to see
Click here.




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