The bioregional assessment for the Clarence-Moreton bioregion found that potential changes in water resources due to the withdrawn West Casino Gas Project would likely have been minimal at the surface. This is because the proposed development would have extracted small volumes of groundwater compared to the volume of groundwater recharge. In addition, multiple layers of low permeability rock, called aquitards, are a partial barrier that limit changes to water within the coal seams and other deeper layers from reaching the surface.
There is very limited potential for the commercial production of coal seam gas in the Queensland part of the bioregion and no new coal mining development was identified in the bioregion.
The bioregional assessment for the Maranoa-Balonne-Condamine bioregion found that the impacts of two proposed coal mines on water resources in the Maranoa-Balonne-Condamine subregion will be limited to small areas near the mines. Most water-dependent assets in the region will be unaffected. Possible impacts on 15 percent of the Barakula State Forest, a small number of bores, and some areas of groundwater-dependent ecosystems and threatened species habitat may require more detailed local investigation, for example, as part of an environmental impact assessment.