• Previous Production from 1958 - 1993: Approximately 8 million tonnes at 6-10% Zinc, 1-4% Lead, 60 g/t Silver and 0.2% Copper
• April 2009 independent NI 43-101 indicated resource estimate of 390 million contained lbs zinc, 149 million lbs lead and 6.5 million ozs silver in 5,298,000 tonnes at an average grade of 3.34% zinc, 1.27% lead and 38 g/t silver in the new Magistral North, Central and South deposits using a 2% ZnEQ* cut-off grade. Additional inferred resources of 144 million contained lbs zinc, 25 million lbs lead and 1.3 million ozs silver in 2,244,000 tonnes at 2.92% zinc, 0.50% lead and 18 g/t silver also reviewed using same cut-off grade.
• All three Magistral deposits remain open to depth and to the east.
• Additional mineralized bodies (Puajanca) currently undergoing drilling
• Excellent exploration potential on large (44-sq. km) land package
• Anticipated attractive CAPEX due to pre-existing infrastructure (hydroelectric power station, camp, processing & concentrate plant)
• Operating costs estimated to be in lower quartile due to presence of significant silver mineralization in the Magistral zones

*ZnEQ = ((Ag Price(g) x Ag Recovery x Ag Grade) + (Pb Price(t) x Pb Recovery x (Pb Grade(%)/100)+(Zn Price(t) x Zn Recovery x (Zn Grade(%)/100)))/Zn Price(t). Golder Associates utilized the three year rolling average price for all three metals. Price for silver is per gram ($0.43339) and that for Pb ($1,983) and Zn ($2,742) is per tonne. A recovery of 85% was applied to Ag, 94% for Pb and 91% for Zn based upon Trevali's metallurgical testwork. A 2% ZnEQ* cut-off grade is the nominal base case estimated grade of material that can be mined and processed considering all applicable costs.