40 | Timaru District Council: Pareora Pipeline Project REGIONAL DEVELOPMENT Upgrade on schedule The second section of the project, through the Pareora Gorge, is the most technically complex. from page 38 Industrial Controls are proud to support Timaru District Council CONTACT US 03 687 8004 | email@gressons.co.nz | www.gressons.co.nz Proud to provide legal support to Timaru District Council Infrastructure Resource Management Property & Conveyancing sheelagh@southislandarchaeology.com | 022 088 6257 tj@southislandarchaeology.com | 020 417 83081 www.southislandarchaeology.com Your Archaeology Experts We offer a full range of Archaeological Services in Canterbury, the West Coast and throughout the South Island. These include; · Archaeological Risk Screening & Management · Pre-Development Assessments · Archaeological Survey & Investigation · Archaeological Authority Applications & Compliance Timaru District Council drainage and water manager Grant Hall says the completion of the pipeline upgrade will offer better supply capacity and resilience for the network. “We broke it into three stages partly because of the technical difficulty that we identified for that section 2 which goes through the Pareora Gorge and we were able to tender all three sections. It provided the ability for different contractors to work in different sections concurrently.” “Pareora has been a source for Timaru’s water supply since the 1870’s. It was a water race and then it got converted into a pipe system and there’s a need to renew the pipe and to protect the resilience of the Timaru water supply.” “Recent events have underlined the importance of this project, so it’s great for the Timaru residents and the business community that we’ve managed to complete this [section 3] critical piece of water infrastructure ahead of time. “Completing this job three months ahead of schedule wouldn’t have been possible without a significant and dedicated effort from our contractors and subcontractors, so I’d like to take the opportunity to thank them on behalf of the whole community. The second section of the project, through the Pareora Gorge, is the most technically complex and runs through a wetland and an area with an active slip, while there are other considerations such as working on arable farms and sheep farms land during lambing. The upgrade involves using an innovative pipe lining technology rather than the option of replacing the 400mm diameter steel pipe along the six kilometre section. Hadlee & Brunton are well resourced and highly proficient to handle this section, Grant says. “Being able to keep the existing alignment with the relining has also provided us quite major performance advantages with the hydraulics of the pipeline.” “One of the other options that we looked at was [horizontal] drilling, but that had significant costs associated with it.” Grant says it is very fortuitous to have Hadlee & Brunton as a local company who has the New Zealand rights to supply the German manufactured textile pipe liner which comprises a double-sided thermoplastic coating. The process requires highly specialised and advanced pipleline camera capabilities to facilitate the installation. “It is a relatively new technology to New Zealand which we have already used on the Downlands water supply scheme. The technology is highly effective and efficient and it works really well; we were pleased to have that as an option for this section through the gorge.” Scheduled to start in September, section 2 is expected to be completed about February next year. The total budget for all three sections is just on $15 million. Given some of the problems created by lack of investment in water infrastructure and the water discolouration incident locally, this investment was absolutely essential Grant says. “To be able to continue to utilise the [Pareora pipeline] is critical to our water supply.”
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