The Snowy Mountains Hydro-electric Scheme, is one of the most complex integrated water and hydro-electric power schemes in the world and is listed as a world-class civil engineering project by the American Society of Civil Engineers. The scheme interlocks seven power stations and 16 major dams through of trans-mountain tunnels and of aqueducts. The history of the Snowy Scheme reveals its important role in building post World War II Australia.