Osisko Receives Modified Operating Parameters at Canadian Malartic

Osisko Receives Modified Operating Parameters at Canadian Malartic 
MONTREAL, QUEBEC -- (Marketwire) -- 02/19/13 -- Osisko Mining
Corporation (the "Company" or "Osisko") (TSX:OSK)(FRANKFURT:EWX) is
pleased to report that it has been advised by the representatives of
the Government of Quebec that conditions to its operating parameters
have been modified allowing it to increase access to the northern
portion of the deposit and to improve the framework for the execution
of its blasting operations. The modifications allow Canadian Malartic
to perform blasting sequences of up to a maximum of 15 seconds and to
conduct blasting operations between 11:00 AM and noon, and 3:00 PM to
4:00 PM. 
Sean Roosen, President and Chief Executive Officer of Osisko,
commenting: "Our team and our consultants have worked diligently with
the Ministry of Sustainable Development, Environment, Wildlife and
Parks personnel to add necessary flexibility in our operating
conditions while ensuring the necessary safeguards for our host
community and our employees. We would like to recognize the efforts
made by all parties in making these necessary modifications. With
these new guidelines we are confident that Canadian Malartic will
continue to advance for the benefit of all stakeholders". 
The Canadian Malartic Mine employs over 600 people and is an
important economic contribution to the Town of Malartic, the
Abitibi-Temiscamingue region and the province of Quebec. In 2012,
Osisko's salaries and purchases of goods and services totalled
approximately $585 million.  
About Osisko  
Osisko Mining Corporation operates the Canadian Malartic Gold Mine in
Malartic, Quebec and is carrying out aggressive exploration and
project development elsewhere in Canada and Latin America. 
John Burzynski
Vice-President Corporate Development
(416) 363-8653
Sylvie Prud'homme
Director of Investor Relations
(514) 735-7131
Toll Free: 1-888-674-7563
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