June 2024
All four Balance of Plant Tanks have been completed and passed their hydrostatic tests. This involved filling the tanks with water to ensure there were no leaks. Each tank is approximately 11 metres high, with an internal diameter of 15 metres, and has a capacity of 1.944 million litres. When full, the total weight of each tank is 1,993 tonnes. The Service Water Tank is for potable water used across the project, while the Demineralised Water Tank will hold demineralised water of extremely high purity for use in the power generation process. It took 46 B-double trucks delivering 42,000L of water each from Colongra Power Station to fill the Demineralised Water Tank (third from left in image). The total travel distance of this two-week process was 5,520km or HPP to Perth and almost halfway back. All four tanks will now be handed over to the commissioning team, who will start filling the remaining tanks with diesel to be used for commissioning of the turbine. These diesel tanks will hold the back-up fuel to keep the turbines going when gas is not readily available.