American Bonanza Gold Corp

Recently Completed Work Programs

In 2005 Bonanza commissioned AMEC E & C Services Inc., a respected international engineering firm, to complete a NI 43-101 compliant resource estimate. As previously announced the AMEC estimated mineral resource, effective January, 2006, and based on a cutoff grade of 5.1 g/t gold and capped at 137 g/t gold was reported as:

Zones Classification Tonnes Gold Grade
Contained Ounces
of Gold
A, B, C and D Measured + Indicated 970,400 10.73 334,929
A, B, C and D Inferred 189,600 10.87 66,266

Bonanza has made the decision, as previously announced, to expand this high grade gold mineral resource before making a production decision, partially based on the potential confirmed in the AMEC study. Further drilling in 2006 at Copperstone will be directed at targets generated by utilizing Bonanza's new exploration model. If successful, the drilling will be followed by further engineering studies to support a positive production decision.