Agnico-Eagle, Laronde Division is a dynamic and growing gold producer in the Val d’Or / Bousquet region of Quebec in Canada. Production expansion requirements were met by adding a SAG mill to an existing ball mill grinding circuit. Grinding energy requirements were determined using MacPherson Autogenous, Bond Ball Mill, and Rod Mill Work Index testing, and Minnovex SAG Power Index (SPI) testing. The hardness of present and future ore zones were studied. Final mill design was completed by, Minnovex, SNC-Lavalin and AgnicoEagle. The plant results were predicted accurately from the testwork that was done with regard to specific energy consumed in the SAG mill, transfer size and final product size feeding flotation.