Wakefield Water Treatment Plant

This page details the Wakefield Water Treatment Plant project and provides regular updates. 

The project includes construction of a new water treatment plant at Spring Grove, and a mains pipe to deliver water from the treatment plant to the existing water supply reservoirs in Wakefield.

Background

Extra capacity is required in Wakefield to service projected growth in the area and to better provide for existing demands. 

Tasman District Council also has an ongoing programme to improve water treatment quality to meet new NZ drinking water standards.

Water treated by the plant will be sourced from three shallow bores in Spring Grove. These bores draw water from the Wai-iti River and resource consent has been obtained to draw 3,070 cubic meters per day from these bores.

Project map showing the water pipe route and treatment plant location

Wakefield water pipeline route

This map shows the treatment plant location and the pipeline route we are currently working on.

View a larger version of this map in a new window.

Back to Top

Timeline

Construction of the new plant was originally programmed for the 2018/19 financial year, however the initial design estimates were considerably more than the available budget, so the project has been delayed. 

Cost saving options are now being worked through. In particular, more water quality data is being collected, to enable the design team to optimise the water treatment technology with more certainty. 

The new construction timeline will depend on the outcome of these initiatives, but our aim is to tender for the work in early 2019, with construction to begin in mid-2019.

 Back to Top

Progress

Access to the water treatment plant site has been established and a power supply installed.  Water quality monitoring equipment is being installed so that more frequent and comprehensive water quality testing can be completed.  Water quality monitoring will happen between July and December 2018. The aim is to monitor water quality during different river conditions and seasons.  Water quality during periods of flood - when the sediment load in the river is higher - is of particular interest. 

Because the initial design for the water transmission pipe also came in over budget, we are working on an alternative route that covers easier terrain and reduces the number of river crossings. Consultation with landowners is underway to facilitate the new route.

We are also investigating the option of bringing forward construction of part of the planned wastewater pipeline to run between Wakefield and Richmond. This would reduce costs, as both pipes could be installed along the same route at the same time.

Water Pipe route

Wakefield’s water reservoirs are located on a hill overlooking St John’s Church and the existing pipes feeding those reservoirs run through the church grounds. We plan to lay new water pipes along a different route through the church grounds.  An archaeologist has been engaged to consult with the St John’s Church Committee and prepare a plan for work in the cemetery, including an application to Heritage New Zealand.

With over 100 unmarked graves known to exist in the cemetery, ground penetrating radar was used to survey the proposed new pipe route. The system measures ground density, detecting any disturbance that would indicate the possible presence of unmarked graves.  No graves were found, but excavation work for the new pipe will be monitored by an archaeologist, as there is a remote chance that burials could be uncovered during pipe laying.  If any burials are found, the remains will be reinterred at another location in the cemetery.

Wakefield water radar survey 400px

A survey of the St John's Church cemetery used ground penetrating radar to check for unmarked graves.

Back to Top

More Information

Back to Top