Cumulative Management Area

Under the Water Act 2000 (Water Act), a cumulative management area (CMA) can be declared if an area contains two or more resource tenures, including tenures on which coal seam gas (CSG) and mining activities operate, and where there may be cumulative impacts on groundwater resulting from water extraction by the tenure holders.

A CMA may be declared for the following types of resource tenures:

  • two or more petroleum and gas tenures
  • two or more mining tenures
  • two or more mining and petroleum and gas tenures.

    Why declare a Cumulative Management Area?

    Declaring a CMA enables assessment of future impacts using a regional modelling approach and the development of management responses—such as monitoring programs—that are relevant to the potential cumulative impacts. It also enables responsibilities to be assigned, through the approved underground water impact report, to each tenure holder in the area for monitoring, bore and baseline assessments, and negotiating make good arrangements.

    A CMA is declared by the chief executive of the department under the Water Act.

    When a CMA has been declared, the department will publish a map of the CMA on its website. Resource tenure holders who hold tenure within the CMA will also be sent a notice about the declaration of the CMA.

    The rights of bore owners within a CMA are not affected by the declaration. If a private water bore has or is likely to have an impaired capacity within or outside the CMA as a result of water extraction by resource tenure holders, the resource tenure holder is obliged to make good that impairment.

    The role of the Office of Groundwater Impact Assessment

    The management of groundwater in CMAs is overseen and coordinated by the independent Office of Groundwater Impact Assessment (OGIA).

    For each CMA, the OGIA is required to produce an Underground Water Impact Report (UWIR) which will include:

    • a prediction of impacts on water levels
    • a water monitoring program
    • a spring impact management strategy
    • an assignment of responsibilities to individual resource tenure holders to undertake water management activities in the area.

    The OGIA will consult with resource tenure holders, bore owners and the public on the development of an UWIR for the CMA.

    Surat Cumulative Management Area

    The Surat Basin and the Southern Bowen Basin contain petroleum and gas (including CSG) operations.

    CSG activities occur in the Walloon Coal measures of the Surat Basin and in the Bandana and Cattle Creek formations of the Southern Bowen Basin. Conventional petroleum and gas activities are undertaken in a number of Surat and Bowen Basin formations including the Precipice and Showground Sandstones.

    The Surat CMA was declared after consideration of:

    • the location of petroleum and gas operations
    • the geology of the area
    • the potential for interconnectivity between aquifers in the area
    • the cumulative impacts of water extraction by petroleum tenure holders.

    The Surat CMA is identified in the attached map (PDF, 1,004.1KB) .

    Approved Surat Cumulative Management Area Underground Water Impact Report

    On 31 May 2016, the OGIA submitted the second UWIR for the Surat CMA (Surat UWIR) to the department. The Surat UWIR was approved with conditions on 24 August 2016, and took effect on 19 September 2016. You can view the approved Surat UWIR.

    Under the approved Surat UWIR, there is an immediately affected area for the Springbok Sandstone, Walloon Coal Measures and the Bandana Formation. There are also small immediately affected areas in the Precipice Sandstone and Cattle Creek Formation.

    Under the approved Surat UWIR, petroleum tenure holders are responsible for:

    • undertaking bore assessments within 60 business days of the UWIR taking effect for bores located in the immediately affected area
    • entering into make good agreements with bore owners within 40 business days of the bore assessment being undertaken
    • implementing a water monitoring strategy
    • implementing a spring impact mitigation strategy.

    Additional information about the Surat UWIR can be found on the OGIA’s website.

    Tenures that are located partly within and partly outside the cumulative management area

    If an identified resource tenure is located partially within and partially outside the CMA, the chief executive may decide whether the tenure is wholly in or not in the CMA. This decision will be informed through advice from OGIA, and whether the impacts of the tenure are overlapping with other resource tenures within the CMA.

    If a resource tenure holder becomes aware that their tenure is located partially within and partially outside a CMA, it should contact the department’s Energy and Extractive Resources Business Centre on phone 13 QGOV (13 74 68).

    Have your say on the proposal to include mining tenures in the Surat cumulative management area

    In December 2016, the underground water management framework in the Water Act was expanded to include mining tenures. The department sought advice from the Office of Groundwater Impact Assessment (OGIA) about possible cumulative impacts on groundwater associated with mining activities in the Surat cumulative management area (CMA). The OGIA advised that coal mining and coal seam gas (CSG) developments target the same coal formation in the Surat and Clarence Moreton basins and impacts are likely to overlap. The OGIA’s advice on the Surat CMA is available upon request.

    The department is evaluating the inclusion of coal mining tenures in the Surat CMA.

    Existing mines are exempt from some of the obligations in the framework if they are authorised under a water licence or permit to take associated water, or were otherwise lawfully entitled to associated water, before December 2016. These transitional provisions for existing mines no longer apply when the tenure is in a CMA.

    Bringing mining into the Surat CMA will ensure that cumulative impacts from all resource tenures are managed under the Underground Water Impact Report (UWIR) prepared by the OGIA.

    Feedback on the proposal to include coal mining tenures in the Surat CMA can be provided by email to:

    Please indicate whether you prefer your feedback to remain confidential. If this is not indicated, your response may be published or quoted in public documents.

    Comments close at 5pm on Monday 15 July 2019.

    Proposed annual levy structure to fund the Office of Groundwater Impact Assessment's mining–related functions

    The Department of Natural Resources, Mines and Energy (DNRME) is developing an annual levy structure to fund the role of the Office of Groundwater Impact Assessment (OGIA) in the mining sector.

    For further details on this levy visit the DNRME website.