tailings, committing to a specific cover design at this stage is immature. This application is committing to a cover system, however the depth of the cover and where the material is to be borrowed to construct the cover can not be ascertained at this stage. It is likely that construction of a cover system will require the importation of suitable material from off-tenure locations. An assessment of the growth media characteristics will be completed by an appropriately qualified person to determine the amelioration requirements to suit the revegetation plan for the PMLU. Due to the lack of topsoil resources, growth media may also consist of ameliorated mine waste materials to be determined by an appropriately qualified person. Methods to ameliorate growth media include (but are not limited to): ∕ Integrated organic materials (compost, biosolids, straw, cane tops, biochar, fertilisers); ∕ Surface mulching (straw, canetops); and ∕ Blending suitable benign materials noting the limitations of material availability at the Mount Morgan Mine site. Revegetation When developing an appropriate revegetation strategy for some Rehabilitated Areas consideration is given for the research work performed and the ongoing engagement with the DNRMMRRD as the underlying landowner and operator of the site though the AMLP to understand their preferred species mix. The proposed seed mix that will be established at the site is subject to agreement with DNRMMRRD, as the Department are the site owner land owner who are. It is premature to specify the seed mix at this time period as site operations have not commenced. 7.5.2.4 Most of the available information regarding revegetation strategies was reported in Unger 2003. It is reported that vegetation surveys were undertaken as a ‘whole of site’ study and general recommendations were made. Recommendations included key species, germination requirements and soil types, with more specific recommendations relating to species most suited for providing high transpiration rates, high-quality runoff, and erosion control (Kasel et al., 2001). A summary of pertinent information is provided below: ∕ Native species such as eucalypts and acacias are the recommended species to use in revegetation, as they are drought-resistant, fire-resilient and are common in dry landscapes in Central Queensland. Several species are noted for their ability to colonise disturbed areas: Corymbia tessellaris , Acacia spp , Pogonolobus reticulatus, and the introduced species Pennisetum setaceum ; ∕ Species that are naturally resistant to fire and drought should be included in revegetation activities, with a focus on seed stocks resilient to fire and drought. Eucalypts and acacias are the most suitable species, along with species of Myrtaeceae and Proteaceae. Seed sown should be propagated without fertiliser and be sown around the time of seasonal rains; ∕ Native grasses should be used as a ground cover; however, grass seed should not be used until woody species have been established to limit competition. In areas where controlling ARD maybe difficult, a mix of native grass and pea seeds should be sown, with eucalypt and acacia tube stock introduced after the desired level of cover is achieved; and ∕ When planning revegetation on exposed areas, thought should be given to the soil type and soil cover thickness: For thin cover, short-rooted species such as grasses, peas and acacias should be considered (acacias are also suited to thicker soil covers). For higher transpiration rates in neutral and slightly acidic conditions, faster growing species such as Corymbia tessellaris and Eucalyptus tereticornis should be used. Ancillary Infrastructure Rehabilitation As with the proposed TSF rehabilitation strategy, the amendment does not propose any changes to rehabilitation strategies or objectives in a way that results in different impacts on environmental 7.5.3
Project number: 25B061
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