The Kairakau water supply was signaled as a key project leading into the 2018 Long Term Plan, – Together we Thrive – as part of the #bigwaterstory.
Council is committed to providing durable infrastructure, that allows for smart growth, is environmentally responsible and ensures our proud communities are able to prosper. With this in mind, the Kairakau water supply project has been expedited due to failures over the Christmas 2019/20 season. This project is a key enabler of our THRIVE objectives while meeting future regulatory requirements and community demands on infrastructure.
Our current 2018 Long Term Plan identifies a project to upgrade and future proof Kairakau’s water supply. Council has worked with engineers to develop the best options in doing this and is now seeking your feedback.
This is a key project as part of #thebigwaterstory Capital Programme.
Water is pumped from a shallow bore off Kapiti Place, and from a spring off Brodie Place. It is stored in raw water tanks, before it is dosed with chlorine and pumped up to the treated water tanks on the hillside above Kapiti Place. Water is then fed to the town and campground via gravity pipelines. Each property has its own on-site storage tank which is supplied by roof water, as well as water from Council’s water supply scheme. If Council are to continue supplying potable water to the residents of Kairakau, it will need to comply with the Health Act. This requires that the water meets the Drinking-water Standards for New Zealand (DWSNZ).
Three options have been developed to upgrade the Kairakau water supply.
Note, there were originally four options presented. Options 1 and 2 were variants of each other and have been combined into Option 1 to simplify. The only difference between these options was the disconnection of the rain water tanks which has now been included as an additional item to consider under Option 1.
Option 1a – involves constructing the treatment plant on the Council reserve on Kapiti Place between 4 Brodie Street and 15 Kapiti Place. The site proposed would occupy the full width of the reserve (17m) and approximately 18m from the end boundary, and would be fully fenced. Access would be required through the reserve of Kapiti Place for service vehicles on an occasional basis.
Option 1b – involves constructing the treatment plant on the Manawarakau Charitable Trust land at 15 Brodie Place as an extension of the existing site. A treatment plant would be added to the south end of the site and the site, including the spring and raw water tanks, would be fully fenced. Access would be required through the current route adjacent to 13 Brodie Place for service vehicles.
Note that this report does not consider the feasibility of using the land (at either site) and that this will be considered separately by Council.
Location of key Kairakau water supply elements:
After reviewing the community engagement received, Council is working with our project engineers and property team to assess additional options, and potential edits to current proposed options, (please see original options report under Key Files and Documents).
Council aim to release an updated Options report in early 2021.
View a summary of feedback received during the engagement process in the Engagement Summary Report.
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Water usage data for the past two years indicates Kairakau uses an average of 24m3/day across the year from Council supply. Usage is usually higher in summer with the average usage from December to February increasing to 34m3/day.
1m3 is the equivalent to 1000 litres.
Currently water is dosed with Chlorine to disinfect and kill germs. Chlorine is added to the water at a dosing point before it is distributed to the community, however there is no automated system in place. Council actively samples points within the distribution network to confirm chlorine levels and tests for other quality parameters – this could be viewed as lead and lag measurements.
An upgrade is required to ensure Council is providing safe drinking water to the community. In order to do this Council has to comply with Drinking Water Standards for New Zealand. The current supply does not comply, therefore upgrades are required.
This project is an important project as outlined within the wider programme of work and the council’s commitment to building durable infrastructure to ensure smart growth that is environmentally responsible and allows communities to prosper.
A water safety plan documents the risk-based assessment of the current water supply scheme and control measures which should be implemented to enable a safe and secure supply of drinking water to consumers.
The project has been set aside budget of $549,000 in the 2018 Long Term Plan, and Council are planning to deliver the project within the budget set aside.
As the project funding was planned for through the 2018 Long Term Plan process, there is not planned to be a further rating impact because of this project. The funding to deliver this project is currently accounted for in the 2018 Long Term Plan rates forecasts. We expect to draw the loan down for the project in 2021.
The land is currently vested directly to Council as Local Purpose (Recreation) Reserve under the Reserves Act. To locate further water infrastructure on this land will require a planning amendment – although the land is designated under the district plan as water infrastructure.
A restrictor is the flow control device fitted to the service pipe that goes to your supply tank - the restrictor allows water to flow steadily into a tank at a low rate, sharing the available water fairly.
Water will be supplied at Kairakau from Council’s supply only through a connection to an on-site water storage tank at each premise. This supply may be used as an “on demand” supply for “ordinary use”. The water storage tank shall be of minimum volume of 1,800 litres. The supply pipe from the point of supply must be connected to the water tank and include a ball cock or similar device in the tank to prevent overflow of the water in the tank. No connections shall be taken off the supply pipe, and all plumbing on the premises must be feed from the water tank.
The water bylaw can be accessed on Council's website here.
November 2020: We expect to compete community engagement
March 2021: Confirm the option and work on design
April 2021: Procure and commence construction.
December 2021: Expect to have the project completed by the end of 2021.
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