Stormwater Management Plan

Stormwater

In this section

What is a Stormwater Management Plan?

A Stormwater Management Plan is a framework to manage stormwater discharges from an urban reticulated stormwater system.  Within the management plan framework opportunities to reconsider the effects associated with the discharges can be managed.  There are current environmental standards  it must meet as a starting point.

The Stormwater Management Plan will set out an adaptive management approach, as it aligns with the Local Government Act Long-term Plan process.  An adaptive management approach enables greater alignment, flexibility, and prioritisation from the monitoring of the environment and where, how and when TDC spend their rates.  The approach in turn means prioritising (best return for investment) the spend to gain the greatest water quality and capacity improvements across the district. It will consider the gradual improvements, instead of a one-step long-term solution.

Plans are being developed for Timaru, Washdyke, Temuka and Pleasant Point  urban areas. The Geraldine area already has a Stormwater Management Plan developed and is currently in the process of obtaining its resource consent from Environment Canterbury. However if this project finds we need to completely reconsider our approach to a particular issue, then there is scope to do that.

Why develop a Plan?

Simply put, we have to do it. The Canterbury Land and Water Regional Plan requires Council to obtain a resource consent for discharges from each urban reticulated stormwater system.  A Stormwater Management Plan is a requirement of that consent process.

How does the Plan affect me?

There are a variety of ways the Plan can affect you. If you visit a waterway area, the Plan management (and implementation) may or may not fulfil your expectations for example in respect to water quality and ecology.  This in turn may impact on how you enjoy the quality of the space and your connection with the environment.

Amongst other things, the Plan will put in place the requirements that will need to be achieved by developers. This project provides you an opportunity to have your say and potentially influence how the Stormwater Management Plan addresses those matters in the future.

What phase is the Stormwater Management Plan in now?

Work is at the start of the project with the undertaking of Baseline Studies. This will identify the issues, constraints, opportunities, environmental context and options that occurs within each catchment and area. The following section defines the Stormwater Management Plan (including associated resource consent) process and where we are in that process.

Stormwater Management Plan Process:

Phase 1: Baseline Studies (Current)
  • Network Capacity Assessment
  • Environmental Assessment, including water quality and ecological assessment
  • Groundwater Assessment
  • Cultural Impact Assessment
  • Non-Residential Site Assessment, including commercial and industrial site assessments
  • Contaminated Load Model
  • Flood Assessements (qualitative) beyond the "piped" network
Phase 2: Issues Identification and Preferred Options
  • Key stakeholders and public engagement on the issues and options facing the stormwater management areas and preferred management approaches and solutions to resolve the issues.
Phase 3: Develop Stormwater Management Plans
  • Plans will include an adaptive management approach (i.e. monitor, adjust if needed, re-monitor etc).
Phase 4: Obtain Resouce Consents
  • Global resource consents for the Plans that is managed at a catchment level will be sought from Environment Canterbury.

How is the Plan Developed?

Development of the Plan goes through a rigorous process. As illustrated in the flow diagram, the baseline studies are completed to identify the issues and then develop a multi-criteria options assessment for stormwater treatment and network capacity improvements.  This information will be consulted on with key stakeholders and the public.  The implementation and monitoring of the Plan will be finalised, taking into account the Plan includes an adaptive management approach (i.e. monitor, adjust if needed, re-monitor etc).

What’s Coming Next?

During the baseline studies, information on the general nature of the project will be circulated to key stakeholders and the public to inform those to be consulted.

One-to-one key stakeholder meetings and public consultation will occur after issues facing the stormwater management areas and preferred options to resolve the issue have been identified, which is scheduled for the second half of 2021.  The resource consent application is scheduled to be lodged with Environment Canterbury by the first half of 2022.

If you have any questions about the Stormwater Management Plan project, please contact Stormwater Specialist Uki Dele at uki.dele@timdc.govt.nz or on 03 687 7446.

Stormwater Management Plan Consultation

During the baseline studies, awareness of the project will be circulated to key stakeholders and the public.

One-to-one key stakeholder meetings and public consultation will occur once initial work has been undertaken to better understand issues, sensitivities of receiving environments, options, constraints and opportunities.  Then during the development of stormwater treatment and network capacity improvements options consultation will occur, which is scheduled for the second half of 2021.

The resource consent application is scheduled to be lodged with Environment Canterbury by the first half of 2022.

Below is a list of all current and completed consultation undertaken to date:

Consultation TopicStatusPublic Consultation Close Date
Stormwater Management Plan issues and preferred optionsYet to be releasedExpected to be second half of 2021

Stormwater Management Plan Documents

Stormwater Management Area Boundaries

Stormwater Management Plan Contact Information

If you would like to stay more updated with the project as it progresses please register your interest with our Stormwater Management Plan Update Service or if you have any questions about the Stormwater Management Plan project, please contact Stormwater Specialist Uki Dele at uki.dele@timdc.govt.nz or on 03 687 7446.

Last updated: 20 Jul 2020