The 2018-2048 Stormwater Strategy refers to the Councils commitment through an integrated management of effective and efficient stormwater activities for economic vitality, desirable lifestyles and ecological health. And by looking into these specific areas:
- Planning and regulation
- Asset Management
- Receiving Environment
- Stakeholder Engagement and Education
Council has established goals for the 30 years that will ensure flood protection and maintain water quality and aquatic habitat.
Discharge of Stormwater
Discharge of stormwater into waterways is regulated by Environment Canterbury. Timaru District Council must have consent from Environment Canterbury to discharge into the Waterways. The District is working on Global Resource consent for the Urban Catchment areas to allow for discharge into the waterways. Resource consent applications and associated Stormwater Management Plans are scheduled as follows.
Resource Consent and Stormwater management Plans:
- Geraldine Stormwater Management Plan (2019)
- Timaru Stormwater Management Plan (planned for 2020)
- Temuka Stormwater Management Plan (planned for 2021)
- Pleasant Point Stormwater Management Plan (planned for 2021)
Stormwater Services Consent
With any new development, you should ensure that the stormwater discharge does not cause nuisance flooding to surrounding properties. Any building activity, such as raising the ground level, increasing the impermeable area or blocking an overland flow path, could increase the amount of stormwater flowing onto a neighbour’s site. You must obtain a building consent or resource consent from the Council for such an activity.
An onsite stormwater management device may be required as part of the conditions of the consent. Refer to On-site stormwater management devices for more detail.
It is illegal to intentionally direct stormwater onto a neighbouring property. If this happens, the stormwater may cause damage to the neighbouring properties, which could lead to a dispute or, at worst, legal action and compensation
Overland Flow Paths and Flood Plains
Overland flow paths are routes stormwater follow during heavy storm events. They are usually illustrated in a Catchment Management Plan or on Council record plans. They are the overland route taken by any concentration of, or significant sheet flow, of stormwater on its way to a flood plain.
A flood plain is an area of land that is adjacent to a river or a stream that is going to be flooded in a severe flood event. Usually, there are restrictions around what can and cannot be done within this area. When existing, natural or manmade drainage is overloaded, stormwater flows via overland flow paths.
These flow paths are a vital component of Timaru drainage system, but often are blocked by solid fences, sheds, unsuitable plantings or even permanent buildings. This can cause secondary flooding around the flow path.
Landowners should not block the flow paths on their property. Any deliberate blocking of the flow path may make the property owner personally responsible for any flooding damage caused.
Last updated: 06 Nov 2019