What are the Lower Taieri Flood Protection and Drainage Schemes?

Lower Taieri Flood Protection Scheme

The Lower Taieri Flood Protection Scheme mitigates the risk of flooding to the Taieri plain, including the townships of Mosgiel, Outram and Henley. It also protects critical infrastructure such as key transport routes (state highway and railway networks), Dunedin airport, and power and three waters infrastructure.

Along with the East and West Taieri drainage schemes, the Lower Taieri Flood Protection Scheme was the first to be developed in Otago – works started in 1870. It is a complex network affected by many rivers. The scheme uses ponding areas to detain peak flows and ease pressure on the scheme downstream, minimising the risk that the scheme will fail. Silver Stream, Waipori River and the Ōwhiro Stream are tributaries to this lower portion of the Taiari/Taieri River.

East Taieri Drainage Scheme

The East Taieri Drainage Scheme is split into two areas by the Silver Stream, which flows south-west across the Taieri Plain. Drains on the northern side of the Silver Stream generally flow toward what is called the Upper Ponding area.

Drains on the southern side of the Silver Stream flow toward the Lower Ponding area. When the flow of the Taiari/Taieri River is low, these drains flow out to the river by gravity. Gravity gates close and pump stations are used when flows in the Taiari/Taieri River are high.

West Taieri Drainage Scheme

The West Taieri Drainage Scheme drains part of the Lower Taieri Flood Protection Scheme – the area bounded by the Taiari/Taieri River, Lake Waipori and the West Taieri Contour Channel. A small part of the scheme lies in the Henley Floodway.

The West Taieri area differs from the other drainage schemes in that water must be pumped out – gravity cannot be used to drain water out of the scheme. A significant portion of the scheme lies at or below 1 m of sea level. There are pump stations at Waipori, Henley and Lake Ascog.

Flood protection and drainage schemes combined map

What do the schemes help protect?

The flood protection and drainage schemes outlined above are in place to protect:

  • 25,900 ha of land
  • 21 bridges

These schemes include the following infrastructure:

  • 272 km of open drains
  • 107 km of flood banks
  • 106 culverts
  • 6 pump stations

The Lower Taieri Flood and Drainage Protection Scheme Liaison Group

The Lower Taieri liaison group was established in late 2024 and now has in place a regular cycle of at least twice-yearly meetings.

The purpose of the liaison group is to act as an informal committee who work alongside ORC to:

  • Provide feedback to the ORC through the liaison group on proposed scheme operational and capital programmes.
  • Provide feedback on the scheme levels of service.
  • Provide feedback on the development of infrastructure strategy, asset management plans and rating/funding proposals as relevant to the schemes.
  • Facilitate effective communication between the scheme ratepayers, key infrastructure providers and ORC.
  • Be the ‘eyes and ears’ of the scheme community in relation to scheme performance and stakeholder satisfaction.

The Chair of the Liaison Group hosts a public annual general meeting, the meeting details and agenda will be listed on the Events and meetings page.

 

Liaison Group representatives (left to right) David Wilson (West Taieri), Matt Kerr (West Taieri), Andrew Simms (former representative for Mosgiel Taieri Community Board), William Kirkland (East Taieri), Simon Parks (East Taieri), Colin Scurr (West Taieri), Lloyd McCall (former ORC councillor representative), Kate Wilson (ORC Councillor), Nick Rodger (GM Infrastructure & Operations, Dunedin Airport). Absent Julie Struthers (East Taieri)

 

Representatives on the Liaison Group

The Lower Taieri Flood Protection and Drainage Scheme Liaison Group acts as an informal committee who work alongside Otago Regional Council.

There are six seats available for community representatives.

Three seats are allocated to each of the East and West Taieri Schemes, as well as representatives from the Mosgiel Taieri Community Board, Dunedin International Airport, and from the ORC.

Representatives

Number in group

East Taieri

3

West Taieri

3

Dunedin International Airport

1

Mosgiel Taieri Community Board

1

ORC Councillor

1

Total

9

ORC will also continue to actively engage with mana whenua on key issues relating to these schemes, allowing participation in decision-making, and support in the development of capability.

Nominations will be called for by the liaison group as positions are available or when terms end. Nominations are open to everyone who lives in the scheme area. The group is able to co-opt members to the group where relevant.

Representatives elected 2024

Area

Representative

West Taieri

David Wilson

West Taieri

Matt Kerr

West Taieri

Colin Scurr

East Taieri 

Julie Struthers

East Taieri

William Kirkland

East Taieri

Simon Parks

GM Infrastructure & Operations, Dunedin Airport

Nick Rodger

Mosgiel Taieri Community Board representative

Andrew Sutton

Outram*

Neville Goodsir

*At the 2026 annual general meeting Neville Goodsir was co-opted onto the group to represent Outram

Other flood protection and drainage schemes

ORC owns and manages several other flood protection schemes and drainage schemes as well as a combined flood protection and drainage scheme.

They are:

ORC also owns but commissions external management for parts of the Lower Waitaki River Control Scheme.

 

Waipori Pumping Station

 

Re-establishing liaison groups

The Lower Taieri liaison group was established in late 2024 and now has in place a regular cycle of at least twice-yearly meetings.

Frequently Asked Questions (FAQs)

General FAQs

Liaison group FAQs

Contact us

If you have any questions around the flood protection and drainage schemes, the liaison group, or the nomination process, please don't hesitate to reach out.

 

You can email us at customerservices@orc.govt.nz

Give your feedback using our online contact us form

Or call us freephone on 0800 474 082 Monday to Friday, 8am to 5pm