Notice
Information request
EA condition W10 states “The holder of this environmental authority must only undertake mining activities that result in no change to, or a reduction of the effective catchment reporting to the Mount Morgan Open Cut Pit.” The cover letter provided (WTS, 2025a) 9 states the only potential mechanism where the catchment reporting to the OCP could change is through a spill or seepage from the UGM TSF, however, as indicated in this information request seepage requires investigation. A dam break mechanism was not considered, and it is unclear why. Further, the reference to the CCA results to demonstrate compliance with this condition requires clarification as the UGM TSF CCA Report and the application materials does not consider or detail the catchment nor how Heritage Minerals Pty Ltd can comply with the existing condition.
Provide advice on when the proposed UGM TSF is intended to be constructed in consideration of the comment in the adjacent column and how the construction and operation will adhere to the current noise limit authorisation of the EA.
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Noise
The application material states the proposed UGM TSF construction works will not occur between 6:00AM to 6:00PM and no works will occur at night. Consequently, it is unclear when the facility will be constructed and comply with current noise limit authorisation. Environmental Offsets Act 2014 (EO Act) – Matters of State Environmental Significance (MSES) Regional ecosystem (RE) 11.10.2 is classified as a MSES (Regulated Vegetation – Category B ‘Of Concern’) and it is acknowledged an environmental offset under the EO Act is required for the permanent destruction. Ground truthing surveys have
The Queensland Herbarium provides the information required to update the mapping. Refer to DETSI (2025) 10 to update the mapped MSES value (RE 11.10.2, Regulated Vegetation – Category B ‘Of Concern’) and provide evidence regarding its completion.
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9 WTS, Prelodgement Upper Mundic Gully TSF EA Amendment, 28 October 2025
10 Department of the Environment, Tourism, Science and Innovation, Information Sheet – Regional ecosystem mapping overview for environmental assessments
(ESR/2023/6632).
Page 16 of 20 • ESR/2016/3447 • Version 4.02 • Last reviewed: 29 OCT 2025
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