MONTREAL, QUEBEC, Jul 09, 2009 Osisko Mining Corporation ("Osisko") (TSX: OSK)(FRANKFURT: EWX) is pleased to announce that the Quebec Minister of Sustainable Development, Environment and Parks has made public the report on the public inquiry and hearings on the Canadian Malartic project by the Bureau d'audiences publiques sur l'environnement (BAPE), Quebec's environmental review board.

The report "concluded that the project could be authorized under certain conditions. These conditions include certain follow-up programs and the deposit of financial guarantees sufficient to ensure that the project could be carried out in a sustainable development perspective."

Osisko President and CEO Sean Roosen commented: "We are pleased to have passed this major stage in the regulatory approval process for the Canadian Malartic project. We are satisfied by the report's conclusions and will carefully review all the BAPE commissioners' comments and recommendations. We intend to take these into account should authorization be granted to move on to the next phases of our project."

"We are more enthusiastic than ever at the prospects offered by our project for Malartic's community as well as for our investors," Roosen added. "Should the Quebec provincial cabinet authorize us to go ahead, we are confident that the Canadian Malartic project will create value not only for our shareholders but also for the economy, businesses and workers in Malartic, Abitibi-Temiscamingue and all of Quebec. From the beginning of this project, we have been determined to optimize the economic impact over its entire life cycle, while being diligent to minimize its impact on the physical and human environment. We are committed to facilitating its integration with the community and to creating new sustainable development for Malartic and the region."

The complete report is available on the BAPE website at: http://www.bape.gouv.qc.ca.

About Osisko
Osisko Mining Corporation is currently developing the Canadian Malartic gold deposit and evaluating adjacent areas for a large-scale open pit, bulk-tonnage mining operation. The Canadian Malartic deposit currently represents one the biggest gold reserves in Canada for a single deposit, and is still growing through ongoing drilling on new mineralized zones. Current reserves for the Canadian Malartic property are 6.28 million ounces, plus (including the Barnat deposit) a measured and indicated resource of 3.65 million ounces and an inferred resource of 0.84 million ounces. Osisko is well-funded with approximately $440 million on hand.