Atlas Copco delivers seventh drilling rig to Osisko

August 15, 2011 – Osisko Mining Corporation recently ordered their
seventh PV-235 Pit Viper drilling rig from Atlas Copco Mining and Rock
Excavation Technique Canada to be used in their Canadian Malartic
Operations, currently the largest open-pit gold mine in Canada. Four of
the seven Pit Vipers ordered so far have delivered to Osisko Mining.

In June of this year, Osisko Mining reported that the first day of
commercial production at their Malartic Mine was May 19, 2011, almost
three months ahead of schedule. The Malartic Mine is located in
Malartic, Que., and has been estimated at approximately 9 million
ounces.

Gold digger

Peter Walsh, business line manager for Atlas Copco Mining and Rock
Excavation Technique Canada, highlighted Atlas Copco’s international
reputation in the mining community and their local service presence in
Cadillac, Que., as key reasons for Osisko Mining’s selection of Atlas
Copco drilling rigs.

The Pit Viper series 235 blasthole drill chosen by Osisko Mining is
designed for such applications as hard rock mining for metals and
overburden coal mining. The PV-235 has a weight on bit of up to 65,000
pounds and is designed for rotary or down-the-hole (DTH) drilling of 6-
to 9 ⅞-inch diameter holes.

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