The Balmoral Scheme was built in 1985. Water is diverted from the Hurunui River below the Mandamus confluence into a diversion race on the north bank. The water then runs down a race to a control gate structure and then into a settlement pond. Any surplus water can be returned to the river at this point. A fish screen and intake are located at the head of this pond and the rate of flow into the intake is controlled by a radial gate at the river intake and a second gate at the head of the pond. The consent allows for 5 cubic metres per second of water to be taken.