CALGARY, ALBERTA–(Marketwire – Oct. 29, 2010) – Rio Alto Mining Limited (the “Company”) (TSX VENTURE:RIO – News; OTCQX:RIOAF)(BVLAC:RIO)(DBFrankfurt:MS2) is pleased to announce that Coffey Mining Pty. Ltd., the Company’s independent engineers, have completed the Technical Report that was referred to in the Company’s news release of September 15, 2010 in respect of updated reserve and resource estimates and financial estimates for the Company’s La Arena Project located in north central Peru.
The Company is also pleased to announce that it has appointed Grant Thornton LLP, Chartered Accountants, as auditor of the Company effective October 26, 2010. The resignation of the Company’s former auditor, Davidson & Company LLP, was accepted by the Company on October 26, 2010.
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