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Resilient River Communities

West Taieri Flood Protection Contour Channel Upgrade

Otago Regional Council

This project will upgrade the currently existing Contour Channel, which is a part of the Taieri Flood Protection Scheme in Mosgiel, Otago.

Contour Channel floodbank was originally constructed in the early 1900s using horse and cart construction techniques. The channel intercepts runoff from the various steep streams located on the Maungatua Range and conveys this runoff by gravity to the Waipori River. The channel has an undulating longitudinal profile, which promotes concentration of overtopping during flood events, potentially exposing parts of the floodbank to relatively rapid failure. Floodbank failure could potentially inundate 7,300 hectares of highly productive agricultural land and Dunedin International Airport. The proposed works are therefore necessary to bring the flood scheme up to a standard that can be relied upon as a flood defence.

Cost: $5 million

For more information:

View the case study here