Update 13 January 2021
We are starting final testing of the Martinborough Manganese Reduction Plant (MRP) today, Wednesday 13 January at 10:30am. The testing should last around 5 weeks in total.
As with any testing or commissioning of new water supply infrastructure, drinking water quality compliance requirements are being met, however residents may experience changes in pressure to their water and water discolouration. If either of these issues occur please run a tap, and if the issue does not resolve after one minute, please contact South Wairarapa District Council on (06) 306 9611.
Update 5 November
As we progress towards commissioning the Manganese Reduction Plant we are making sure that everything is working as anticipated.
Last week during the shutdown works, we observed some unexpected water flows. To find the cause we’ve planned another shutdown today; this will not affect water supply.
Update 17 August
The Manganese Reduction Plant (MRP) is a water filtration plant to improve the quality of Martinborough’s water by removing excess manganese and iron. The MRP will allow permanent chlorination of the town’s supply, with a return to the use of all three bores. The current chlorination arrangements are temporary because the town is being supplied by only one bore, the one with the lowest levels of manganese. Water with high levels of manganese becomes discoloured when chlorine is added.
The MRP project is almost completed, pending commissioning the at the end of November 2020 while we await the completion of the Martinborough Water Treatment Plant control system which is being upgraded as well. Together these works will ensure compliance with the Drinking Water Standards.
Update 13 May
Last week the water main connection was completed, which is quite a significant project milestone. The software testing and electrical panel testing were also finished and the two fire hydrants along New York Street have been installed. Now the sub-surface services can be worked on and it won’t be too long until the road work cones and barriers from New York street are packed up.
On Monday the containerised Manganese Reduction Plant was delivered to site and the filters and filter media will be arriving in the next couple of days. When all of this is done, the next stage is mechanical and electrical installation, which will carry on into next week.
Update 6 May
The MRP project continues to track nicely, the pressure testing and disinfection of the pipes is all done and the water tanks were delivered to site.
On Thursday a trial shutdown of the watermain is scheduled in order to test the valves, this will only take an hour or so. The following day the connections to join the MRP to the water main will be installed, ready for use when the MRP construction is complete. This means that there will be an interruption to service for one occupied residential property for four hours, bottled water will be provided ahead of time.
While the water main is turned off, Wellington Water will be installing the two additional fire hydrants outside Peppers and Nga Waka winery, to remove a backflow / contamination risk and boost firefighting capability.
Update 30 April
The MRP construction is going well. Three weeks into the project, all sub-surface infrastructure is in place, including the concrete bases.
The waste water pipe and connection to Pepper’s sewer main has been completed, awaiting pressure testing. In doing our work we discovered an unmarked Chorus cable and irrigation pipe, location information will be shared with SWDC.
Off-site the containerised Water Treatment Plant is almost built, along with the electrical panels. The software testing is done and the water tanks have been made
This week pressure testing and disinfection of pipes is scheduled and the delivery of the water tanks is expected.
Wellington Water has also taken the opportunity to install two additional fire hydrants outside Peppers and Nga Waka winery, to remove a backflow / contamination risk and boost firefighting capability.
Waterworks go on in South Wairarapa
Work continues on critical water projects across South Wairarapa despite the Covid-19 lockdown.
The projects to boost Martinborough's drinking water access and keep water flowing across the district have been deemed critical by Wellington Water, which took over South Wairarapa District Council's infrastructure supply last October.
The removal of manganese from most of the town's water supply has been a long-standing goal for the company. The 2019 E. coli scares in the town led to chlorination of the town supply.
As manganese discolours chlorinated water, only one of the town's bores is in use - the one with the least manganese. Once the reduction plant is installed, the town would be able to use all four of its bores.
Over the summer, it has been reduced to one bore, limiting the amount of water available and causing tight water restrictions in the township.
We are building a water filtration plant to improve the quality of Martinborough’s water by removing excess manganese and iron. The Manganese Reduction Plant will enable permanent chlorination of the Martinborough town water supply. The current chlorination arrangements are temporary because the town is being supplied by only one bore, the one with the lowest levels of manganese. Water with high levels of manganese becomes discoloured when chlorine is added.
Effectively removing the manganese from the town supply and being able to return to drawing water from more than one bore is the best course of action to ensure clean, clear, safe and secure water for the town.
The manganese reduction plant is a critical project that will proceed during the lock down period as an essential service.
This means that contractors working on the project will continue to access and work on the site, following COVID-19 operational protocols.
During April we are preparing the site for the plant equipment, which is expected to arrive in May. The project is scheduled for completion during Spring 2020 – in plenty of time for summer.
If you have any questions about the project please contact:
Southern Cross Consulting Ltd
Phone: 021 222 1151
After hours please contact South Wairarapa District Council on 06 306 9611
Manganese Reduction Plant site office
Manganese Reduction Plant design