The Rookwood Weir (Darumbal: Managibei Gamu, meaning keeping â saving [water]) is a concrete weir across the Fitzroy River, located near Gogango, approximately south-west of Rockhampton, in Central Queensland, Australia. The weir was constructed to assist with the supply of water for agriculture, potable water for the Livingstone Shire Council, and industrial needs.
Built between 2020 and 2023, and officially opened on 22 November 2023 by the Queensland Treasurer Cameron Dick and the Federal Minister for the Environment and Water Tanya Plibersek, it was reported that the weir was the largest built in Australia since World War II. Funding for the weir was provided jointly by the Australian and Queensland governments at a cost of .
The weir is situated downriver from the confluence of the Dawson and Mackenzie rivers, in the upper reaches of the Fitzroy, and upriver from the Eden Bann Weir and the Fitzroy River Barrage.
Managed by SunWater, the weir is high and long. The resultant reservoir has a full supply volume (FSV) of , with a yield at FSL of that covers , and with a shoreline that is in circumference. The spillway is long.
During 2023, agriculture investment was announced with a macadamia farm and a cattle feedlot development underway, supported by water supplied from the weir. The weir includes a specially-designed passage to allow local turtles, including the Fitzroy River Turtle and the White-throated Snapping Turtle, to travel up and downstream to breed, seek shelter, and find food; as well as an innovative fish lock.