As part of the detailed investigations undertaken for the amended EIS, GRL consultants proposed a conservative water balance. This examined inputs and outputs including rainfall and evaporation; catchment runoff and collection; surface and groundwater inflows to the open outs and water demand for dust appearance.

The water balance revealed that as of year 4 of mining, water inputs would exceed water use and storage capacity within the Mine Area and therefore a water treatment plant would be required.

Water from the treatment plan, which will be of equal or better quality than that in the Avon River, will be used to irrigate rehabilitated land within the Mine Area and GRL’s adjacent agricultural land.