Copper Development Corporation announced an updated Mineral Resource estimate for its Hinoba-an Copper Project located on Negros Island in the Philippines, based on all of the company's drilling in 2010 and 2011, totaling 34,228 meters. This is 11,758 meters more than was available for the previous mineral resource estimate announced in October 2011. The new JORC-compliant Mineral Resource estimate was prepared by Mining Associates Pty Ltd. (Australia). The total gross mineral resource is 339.0 Mt at an average grade of 0.35% Cu containing 1,187,000 tones of copper, based on a cut-off grade of 0.2% Cu. There is also potential to expand the resource at Hinoba-an in the following areas: Several prospective targets exist on regional structures where copper mineralization has been intersected, such as the A1E structure, located on a regional fault to the east of the A1 Deposit. Results from the most recent drill holes show broad intersections highlighting the down dip potential of the A1 Deposit. A steeply dipping mineralized structure below the DJ Deposit has been identified within the late hornblende diorite porphyry and this structure may link to deeper mineralized porphyries and warrants further investigation. The Inferred Resources at the southern end of the A1 Deposit have the potential for upgrading tones and grade with additional drilling.