2007 Mineral Resource Update for the Rosemont Project Pima County, Arizona, USA

Document ID: 011910

Augusta completed a 40-hole diamond drilling program on the deposit, consisting of resource, geotechnicali, and metallurgical holes. Previously, Augusta carried out a 15-hole drilling program. The results of both of these drilling programs have been integrated with other drilling conducted by other companies prior to Augusta's involvement, to estimate the mineral resources presented in this report.

WLR Consulting Inc. 2007. 2007 Mineral Resource Update for the Rosemont Project, Pima County, Arizona, USA. Prepared for Augusta Resource Corporation. Lakewood, CO: WLR Consulting, Inc. April 26.