Currently in Queensland, waterway barrier works approvals are triggered by constructing or raising a waterway barrier, which includes new or modified culverts, causeways, some bridges and flood ways due to the associated physical barriers to fish passage including increased water flow velocities. Fish passage requirements for culverts where waterway barrier works are required are prescriptively defined by the Queensland Department of Agriculture and Fisheries (DAF) including a requirement for full-height rectangular baffles. Where designs do not comply with the prescriptive designs the applicant must prove that the design is suitable for fish passage, and the current body of knowledge available on what is ‘suitable for fish passage’ is limited.
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