Copper Mountain mine back in operation earlier than expected

         Copper Mountain mine back in operation earlier than expected

PR Newswire

VANCOUVER, May 22, 2013

Web Site: www.CuMtn.com
TSX: CUM

VANCOUVER, May  22, 2013  /PRNewswire/ -  Copper Mountain  Mining  Corporation 
(TSX: CUM) (the "Company" or "Copper Mountain")  announces that further to the
Company's news release of May 17,  2013, the damaged SAG mill transformer  was 
replaced late Friday and the mill was back in operation by 6 pm Friday May 17,
2013. Site  maintenance  personnel  were able  to  successfully  replace  the 
damaged transformer with identical transformers from Ball Mill #1. Operations
over the long  weekend with the  SAG mill and  one ball mill  was better  than 
forecast and  operated at  an average  rate of  1,100 tpoh  or an  average  of 
25,400tpd.

The exact cause  of the  failure is  being evaluated  by the  supplier and  an 
independent third party  consultant. Preliminary testing  has indicated  that 
damage is limited to  one set of  coils in the  transformer, which could  help 
with shortening the timing of repairs. The damaged transformer was trucked to
ABB's transformer  repair  facility in  Edmonton,  Alberta. ABB  has  sent  a 
technical specialist from its plant in Italy to oversee the dismantling of the
damaged transformer,  which is  scheduled to  take place  on Tuesday  May  21, 
2013. ABB's  transformer facility  in Italy  have ordered  the raw  materials 
necessary to manufacture  a replacement set  of coils which  will be flown  to 
their facility in Edmonton  for installation in  the damaged transformer.  The 
repair of the one set of coils is forecast to take 2.5 weeks. The Company has
instructed ABB to manufacture a full set  of coils for the transformer for  an 
estimated cost  of  $125,000  to  ensure additional  coils  are  on  site  and 
available at all times.

Jim O'Rourke, President & CEO of Copper Mountain commented, "We are  extremely 
pleased with our mine site teams'  ability to work quickly and effectively  to 
get the SAG mill operational one full  day ahead of our original estimate  and 
at  an  increased  throughput  rate.   This  operation  with  one  ball   mill 
demonstrates the extra ball  mill capacity available once  we are able to  get 
full tonnage through the SAG mill. "

About Copper Mountain Mining Corporation:
Copper Mountain's flagship asset is the 75% owned Copper Mountain mine located
in southern British  Columbia near the  town of Princeton.  The Company has  a 
strategic  alliance  with  Mitsubishi  Materials  Corporation  who  owns   the 
remaining 25%. The Copper Mountain mine commenced production in the summer  of 
2011, and  has  continued to  improve  its  operations during  the  year;  and 
attained design capacity in  the summer of  2012. The 18,000  acre site has  a 
resource of  approximately  5  billion  pounds  of  copper  and  remains  open 
laterally and at depth.  The mine has  significant exploration potential  that 
will need to  be explored  over the  next few  years to  fully appreciate  the 
properties full development potential. Additional information is available on
the Company's new web page at www.CuMtn.com.

On behalf of the Board of
COPPER MOUNTAIN MINING CORPORATION

Jim O'Rourke"

Jim O'Rourke, P.Eng.
Chief Executive Officer

Note: This release contains forward-looking statements that involve risks and
uncertainties. These statements may differ materially from actual future
events or results. Readers are referred to the documents, filed by the
Company on SEDAR at www.sedar.com, specifically the most recent reports which
identify important risk factors that could cause actual results to differ from
those contained in the forward-looking statements. The Company undertakes no
obligation to review or confirm analysts' expectations or estimates or to
release publicly any revisions to any forward-looking statement.

SOURCE Copper Mountain Mining Corporation

Contact:

Galina Meleger, Corporate Communications 604-682-2992 ext.224 Email:Galina
@CuMtn.com or
Rod Shier, Chief Financial Officer 604-682-2992 ext.222 Email:Rod@CuMtn.com
Website:www.CuMtn.com