A new balance tank for Mangawhai’s wastewater treatment plant is one step closer to completion, with the first pre-cast concrete slabs poured for the tank structure.
The $5.1 million project is being funded by development contributions, as well as through loan and depreciation reserves.
Building the balance tank is part of a draft long term strategy to increase the plant capacity from 2400 properties to 5000.
More connections to the treatment scheme will increase the daily average flow into the system, and also increases peak flows.
Kaipara District Council project manager for the works, Simon Ruddenklau, says most of the time, the wastewater treatment plant can handle variations in flow, but there are times during heavy rainfall when peak flows to the plant are significantly higher.
“The balance tank buffers the plant inflow, reducing the peak flows into the wastewater plant,” he says.
“The tank can be re-purposed as a bioreactor tank when the system is upgraded in a few years.”
The balance tank is expected to be operational by next January.