RIV_2600315 Rangitata River, Arundel Investigation and Flood Risk Option Modelling

Tender summary

Canterbury Regional Council (CRC) has a responsibility to manage flood protection, land drainage and erosion control works across the Canterbury region including for the Rangitata River Control Scheme. Rangitata South Irrigation Ltd (RSIL) who operate a standalone irrigation system has regionally significant infrastructure located at Arundel including intake and control structures and 7 large water storage ponds. Both CRC and RSIL have undertaken preliminary design investigation on improvements to flood protection at Arundel. These strategies included the use of stopbanks to divert water back into the Rangitata river upstream of the Rangitata River bridge. However, modelling and past event evidence has identified that the Rangitata bridge has limited flood capacity that prevents a number of options for the improvement of Arundel flood resilience. The bridge, the irrigation intake, storage ponds, flood protection and neighbouring property assets are all closely inter-related with the dynamically changing nature of the river and flood events that occur at this location. A coordinated approach to evaluating and designing upgrades to these assets is required.

What to check before bidding

• Issued by Environment Canterbury.
• Located in New Zealand.
• Source notice 34261137 on www.gets.govt.nz.
• Notice published 7 Jul 2026; Tenqual indexed it 10 Jun 2026.
• Deadline listed as 7 Jul 2026.
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