Sierra Mojada

JDS confirmed the large silver-rich "super pit" zone for Metallic Ventures (later acquired by Alexco), managed a 30,000-meter, $4M drilling program, oversaw assaying, and completed a revised NI 43-101 technical report for resource estimation. Metallurgical advances enabling sulfuric acid leaching of oxide zinc with electrolytic reduction shifted exploration focus to oxide zinc mineralization. JDS completed and published the PEA in October 2013 demonstrating strong economics: pre-tax NPV5% of $463M, 26.9% IRR, and $297M pre-production capex.