Gwydir Regional Water Strategy

The following frequently asked questions relate specifically to the Gwydir Regional Water Strategy.

What are the impacts of the Tareelaroi Weir enlargement project on downstream users, landholders and the environment?

This option will require assessment against updated floodplain harvesting, climate and environmental water models. The benefits of this option may change when assessed against the updated models. Considerations include:

  • potential effects on cultural heritage sites
  • changes to flow patterns and planned environmental water
  • distribution of benefits amongst consumptive water users and the environment
  • compliance with the Murray–Darling Basin baseline diversion limit
  • potential effects on general security, supplementary and future floodplain harvesting licence holders
  • potential impacts on the sustainable diversion limit
  • effects on connectivity including fish passage, native fish, ecological communities and ecosystems, along with the outcomes of the Gwydir Long-term Water Plan
  • amendments to the water sharing plan
  • potential cold-water pollution.

A range of mitigation measures including biodiversity offsets, environmental flows and fish passage may be required. Enlargement of the weir will reduce waterway connectivity and fish passage regardless of whether a fishway is included within the design.

What are the effects of the construction of the New Lower Gravesend Dam on downstream users, landholders and the environment?

This option will require assessment against updated floodplain harvesting, climate and environmental water models. The benefits of this option may change when assessed against the updated models. Considerations include:

  • potential impacts on cultural heritage sites
  • inundation impacts on landholders in the immediate vicinity
  • changes to flow patterns and planned environmental water
  • potential cold-water pollution
  • distribution of benefits amongst consumptive water users and the environment
  • compliance with the Murray–Darling Basin baseline diversion limit
  • potential effects on general security, supplementary and future floodplain harvesting licence holders
  • potential effects on the sustainable diversion limit
  • effects on connectivity including fish passage, native fish, ecological communities and ecosystems, along with the outcomes of the Gwydir Long-term Water Plan
  • amendments to the water sharing plan.

A range of mitigation measures including biodiversity offsets, environmental flows and fish passage will be required. Full effects on native fish outcomes are unlikely to be fully offset or mitigated.