GOLD MINING: Osisko declares commercial production at Canadian Malartic

QUEBEC - As of June 17, 2011, the Canadian Malartic gold mine is operating at commercial rates. The project is the brainchild of Montreal's Osisko Mining, and it is located near the relocated town of Malartic.

Sean Roosen, president and CEO, commented on reaching this major milestone, "It is our great pleasure to report that our gold milling plant has processed an average of 33,300 tonnes per day during the 30-day period ending June 17, 2011. Our operating team has been successful in ramping up production rapidly and we are seeing steady progress on a daily basis in all facets of our operations. The rapid development of the Canadian Malartic project from exploration to commercial production is a tribute to the hard work, dedication and expertise of our employees and contractors. With great pride we present Canada's newest and largest commercial gold mine."

Construction of the mill was completed in the Q1 2011. Following a water and waste rock testing period, ore was introduced into the mill in late March, and the first gold pour occurred on April 13. The mill is now running at approximately 40,000 t/d. The designed capacity is 55,000 t/d.

Additional informaton, including the remarkable story behind developing the Canadian Malartic mine is posted at www.Osisko.com.