A waste rock dump, referred to as the ‘Western Dump’ occupies a significant portion of the Upper Mundic Gully valley. There is no evidence that rehabilitation methods have been applied to this feature, and it is likely that the Western Dump is contributing ARD seepage into the environment. The Upper Mundic Gully TSF is proposed to tie into portions of the Western Dump to an extent that is practicable which will ultimately seal the currently exposed rock face and further reduce potential ARD seepage into the surrounding environment. The historical impact area of the Mount Morgan Mine total is calculated to cover an area of 459.7 ha. The total footprint of the Upper Mundic Gully TSF is 43.4ha. Potential impacts associated with the project have been reduced by selecting a footprint that incorporates 11.97 ha of the Western Dump. The loss of G. hockingsii will be compensated for via a mitigation planting, with details provided in this Impact Mitigation Management Plan (IMMP). Details from this management plan would provide the bulk of the information for the Impact Management Plan if one was required. The recipient site has been historically impacted by weeds and inappropriate fire regimes for over 100 years. Two specimens of G. hockingsii were located in the recipient area. These individuals were in poor condition, and no recruitment of seedlings was observed. However, the area consists of well drained, shallow, sandy loam soils and an open woodland vegetation of Corymbia species which is consistent with the natural habitat of G. hockingsii (see Section 3 Recipient Site Selection for more details). With the removal of weeds, exclusion of feral stock and fire management implemented this area will provide a suitable and thriving recipient site. 1.3 Purpose and objective of plan The purpose of this IMMP is to outline the actions, roles and responsibilities, and performance outcomes to maximise the long-term success of the management activities. The overarching objective of this plan is to maintain the existing viability of the local occurrence of G. hockingsii by achieving no net loss of individuals of the species in the wild thereby mitigating any impact from the proposed TSF. This plan has been developed in accordance with the Guidelines for the Translocation of Threatened Plants in Australia (Commander et al., 2018), and consideration of learnings from previous management programs involving species from the order Proteales .
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Mundic Gully TSF Impact Mitigation Management Plan - Grevillea hockingsii
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