CONSENT OF EXPERT
March 4, 2008
Augusta Resource Corporation
United States Securities and Exchange Commission
Ladies and Gentlemen:
Re: Augusta Resource Corporation
I, William L. Rose, do hereby consent to the filing of the written disclosure of the technical report entitled
“2007 Mineral Resource Update for the Rosemont Project, Pima County, Arizona, USA” dated April 26, 2007,
and the technical report entitled “Rosemont Copper Project Feasibility Study” dated August 24, 2007 for the
Rosemont Project located in Pima County, Arizona in the Form 40-F Annual Report and the Annual Information
Form of Augusta Resource Corporation (the “Company”) dated March 4, 2008.
I also consent to the use of my name in the Company’s Form 40-F Annual Report and Annual Information
Form dated March 4, 2008 and to the use of the name WLR Consulting, Inc., in my capacity as Principal Mining
Engineer of WLR Consulting, Inc.
By: /s/ William L. Rose
William L. Rose, P.E.
Principal Mining Engineer
WLR Consulting, Inc.