Abstract
The Fitzroy River is one of the largest unregulated rivers in northern Australia and supports a diverse range of freshwater and estuarine species, including a number of endangered species, such as the Freshwater Sawfish, Dwarf Sawfish, Northern River Shark, Freshwater Whipray, Barnett River Gudgeon and Greenway’s Grunter (Morgan et al., 2004). Research of Fitzroy River fishes has highlighted that the Fitzroy River Barrage, a 2.6 metre (m) high concrete weir structure, presents a significant barrier to the movement of fish and their migration within the river system (Morgan et al., 2005). Environs Kimberley commissioned AECOM to undertake a scoping study to investigate options to provide fish passage past the Fitzroy River Barrage.