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Lake Kununurra is a freshwater man-made reservoir located in the Ord River valley. The lake was formed in 1963 by the construction of the Ord Diversion Dam in Kununurra, northern Western Australia, which was built to supply water to the Ord River Irrigation Area. Prior to the diversion dam construction a natural permanent waterhole (or lake) held back by the Bandicoot Bar was known as "Carlton Reach", which was reputed to be the largest waterhole in the Kimberley.