The paper describes the $US240 million expansion at Hudson Bay Mining and Smelting Co Limited's operations in Canada. The company has been continuously producing copper and zinc from local area mines at its Flin Flon metallurgical plant since 1930. The paper details the company's operational turnaround since 1995 and The 777 Project' which includes: two new mines, expansion and modification of the concentrators, expansion of the zinc pressure leach plant, a new zinc electrolytic cellhouse and the modifications to the copper smelter gas handling system to reduce ground level gas emissions.