The Ross Creek Reservoir is an artificial lake in Dunedin, New Zealand. One of the oldest artificial lakes in the country, and the oldest water supply reservoir still in use in the country, it was created in the 1860s to provide water for the city of Dunedin, at that time in the middle of rapid expansion due to the Otago goldrush. Designed by engineer Ralph Donkin and supervising builder David Proudfoot, the reservoir was opened in 1867 as the Royal Albert Reservoir, but the name was unpopular and it has been known as the Ross Creek Reservoir for over a century.