Initially 15 kilometres from Adelaide, the reservoir is now largely enveloped by the city's southern suburbs, of which the relocated Happy Valley village is now one. Although the reservoir is relatively small in capacity; holding only 11,500 megalitres and is dwarfed by Mount Bold Reservoir which is at least four times larger, it is the site of the biggest water treatment plant in Adelaide and is responsible for providing more than 40% of the city's water.
