24 | Solar plant can power facility WWSS has an ultimate capacity of sixty million litres per day, with twenty million litres per day of sustained capacity installed for the first stage. T T from page 23 REGIONAL DEVELOPMENT Tauranga City Council: Waiāri Water Treatment Plant MSQA | Civil | Trenchless | Project Management Proud supplier of Engineer to Contract and Engineer’s Representative services to the Waiari Water Supply Scheme. Nigel Parkinson 021 636 454 nigel@tonicconsulting.co.nz We’re proud to partner with Taurang City Council to deliver water infrastructure that creates lasting community bene ts. ghd.com WWSS has an ultimate capacity of sixty million litres per day, with twenty million litres per day of sustained capacity installed for the first stage, with the idea the plant will sustain the eastern side of Tauranga city for the next thirty-plus years.” The programme of work was separated into several components, with a major part being the water intake at the Waiari stream, a pump station with the rising mains to pump water from the stream up the hill to the treatment plant. Over 700 piles were driven into the ground due to poor ground conditions. The development of an access road within a particularly deep valley had to be constructed as part of this major package of work, and was a significant feat of engineering in its own right. The treatment plant itself consisted of two major parts; the microfiltration plant and equipment, which is the heart of the system, and the balance of the plant consisting of the buildings, a pre-treatment clarifier, a treated water reservoir, all the ancillary wastewater treatment and recycling plant together with chemical tanks, stormwater handling dam. “Construction of the treatment facility commenced in 2020 with pre-loading 30,000m3 of material to compact the ground to take the structural load,” explains Peter. “Another large body of work was laying of twenty-two kilometres of pipeline linking the treated water from the plant to link into the existing water reticulation network. “In December 2022 the reservoir with capacity to store ten million litres of treated water was completed. We have also installed 110kw of solar power. “On a good day we can run the treatment off solar energy, with surplus energy going back into the national grid. That is quite a nice sustainability story.” While a project of this nature always attracts a diversity of technical challenges that have to be navigated, Peter acknowledges that Covid19 lockdowns presented a range of unexpected issues, creating project time delays, supply chain and cost escalation challenges. But he says the project has been an amazing journey. “I have been with TCC since 2007 and was part of the original consenting process. “The journey started well before my time and it is great to see something like this come into fruition. “It is definitely a once in a lifetime opportunity to be part of a big project like this. “Effectively the project reduces the demand on one of our other water treatment plants and that capacity can be dedicated to growth on the western side of the city.” Your Business, Your Industry, Your News. Each edition priority delivered to your door. i i i i li . www.waterfordpress.co.nz/subscriptions . t f . . / i ti 03 983 5525 Stay informed; we work with business owners and decision-makers across all economic sectors, profiling their success. t i f r ; r it i r i i - r r ll i t r , r fili t ir . businessnorth
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