Southern Cross Operations Annual Environmental Report 2008 - 2009

2009 Annual Environmental ReportSouthern Cross OperationsFor the year ended 30 June 2009, a total of 2.23 Mt of ore was processed, yielding156,105 ounces of gold (Au) with a recovery rate of 88% (Table 5-1). The processingplant throughput was approximately 15% below the nominal rated throughput of 2.6 Mtspecified in EP Act Licence 4597/12. The quantities of the processing consumablesused during the year are in Table 5-2.Table 5-1: Processing Summary July 2007 – June 2008Ore Source Tonnes GradeMill throughput 2,233,367 2.48Ounces Au Oz 156,105Recovery % 88.0%Table 5-2: Processing Consumables July 2007 – June 2008Consumable Unit TotalUnit /tonneMilledPrimary Grinding Media kg 640,776 0.29Secondary Grinding Media kg 677,060 0.30Cyanide kg 2,137,119 0.96Lime kg 14,402,070 6.44Carbon kg 53,000 0.023Oxygen m3 755,074 0.34Lead Nitrate L 169,498 0.076Hydrochloric Acid L 358,948 0.16Sodium Hydroxide kg 527,210 0.24LPG L 466,570 0.215.1 Tailings ManagementIn August 2003, Notice of Intent 4307 and Works Approval 3826 were submitted toextend the life of the Marvel Loch TSF with a final planned height of 1,040 m RL.During the review period, embankment raising works were undertaken on Cell TSF 2from 1,034.5 mRL to 1,037.0 mRL and Cell TSF 2E (Extension) from 1,032.5 mRL to1035.0 mRL.The construction work involved raising the perimeter embankments by 2.5 m utilisingupstream construction techniques and dried tailings borrowed from within the storagecells. As part of construction works, decant access and decant structures were alsoraised by 2.5 m.A further embankment raise of TSF1 of 2.5 meters was approved by the DECsubsequent to the reporting period and works had commenced at the time of writing21