Southern Cross Operations Annual Environmental Report 2008 - 2009

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2009 Annual Environmental ReportSouthern Cross Operations6.2 Burbidge Area (Grand National & Resurrection – Bronco)The South Burbidge Closure Plan was developed in 2008 on the principles establishedin the South Burbidge Mining Proposal. During 2007/2008, the Burbidge area wasoperational with the main rehabilitation focus being on using waste from Tenacious Pigand Grand National for capping GVG TSF 1-3 and a smaller amount to the BroncoSouth waste dump. The continuance of mining into this reporting period at GrandNational generated additional reactive waste material that was backfilled intoTenacious Pig. Sterilisation of Tenacious Pig was completed at the conclusion ofmining at Grand National in February 2009.Abandonment bunding was established around the perimeter of the Grand Nationaland Bronco South open pits immediately after the completion of mining atResurrection. The vast majority of bunding material was sourced from low-gradestockpiles on the old Grand National-Bronco South haul road, and additional oxidematerial was salvaged from Resurrection.Mining of laterites and oxide at Resurrection during the year created sufficient quantities ofwaste material to cap dispersive kaolin clays on the Bronco South waste dump situated tothe west of the pit. Approximately 130,000 tonnes of competent waste material wasstockpiled on the crest of the dump during mining operations, before reshaping of slopesand subsequent sheeting was undertaken in June 2009. Only a very small portion of thesouthern tip of the land form remains to be capped.6.3 Nevoria (Norton Waste Dump)The continuation of mining at Norton through the period resulted in additional wasterock material being dumped on the waste dump atop the old Nevoria TSF. This tookplace until February 2009. Major reshaping of batters to an 18° constant (no berms)slope was undertaken soon after (Figure 6-6). Topsoil salvaged from the clearing of theNorton pit was selectively used to sheet the batters as there were insufficient quantitiesavailable to cover the entire land form. In terms of rehabilitation accounting,approximately 10.73 hectares of the Norton waste dump was rehabilitated to R1 statusand 10.89 hectares (batters) to R2 status.30
2009 Annual Environmental ReportSouthern Cross OperationsFigure 6-6: Profiled and Topsoil Sheeted Batters of Norton Waste Dump6.4 KurrajongMining resumed at Kurrajong in February 2009 and was completed in April of the sameyear. The project comprised an open pit, three hectare waste dump, 1.5 kilometre haulroad and ROM facilities. The waste rock landform was progressively rehabilitated andbattered down to an 18° slope as per the Kurrajong Mining proposal. Salvagedtopsoils were eventually spread over the entire landform and deep ripped alongcontours (Figure 6-7). Seeding with local provenance native seed was completed inJune 2009. The haul road to the Kurrajong ROM was also ripped, sheeted with topsoiland seeded during the reporting period (Figure 6-8). The removal of ore stockpiled onthe Kurrajong ROM in May was followed by deep ripping and seeding of the oxidesubstrate, which was completed in June. Rehabilitation of disturbance associated withthe Kurrajong mining project viz waste dump (3.0ha), haul road (2.63 ha) and ROM(6.79ha) totalled 12.42 hectares.31
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Southern Cross Operations Annual Environmental Report 2008 - 2009

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