Barrick Gold Corporation is a Canada-based gold and copper producer, which is engaged in the production and sale of gold and copper, as well as related activities, such as exploration and mine development. It has ownership interests in producing gold mines that are located in Argentina, Canada, Cote d'Ivoire, the Democratic Republic of the Congo, the Dominican Republic, Mali, Tanzania and the United States. It has ownership interests in producing copper mines in Chile, Saudi Arabia and Zambia. Its operations include Nevada Gold Mines, Bulyanhulu, Hemlo, Jabal Sayid, Kibali, Loulo-Gounkoto, Lumwana, North Mara, Porgera, Pueblo Viejo, Tongon, Veladero and Zaldivar. Its Bulyanhulu operation is located in north-west Tanzania, approximately 55 kilometers (km) south of Lake Victoria and 150 km southwest of the city of Mwanza. The Hemlo operation is located north of Lake Superior on the Trans-Canada Highway, approximately 35 km east of Marathon, Ontario, and it is an underground operation.