African Barrick Gold has four producing gold mines in northwest Tanzania — North Mara, Bulyanhulu, Tulawaka and Buzwagi — in addition to a suite of exploration properties, and as at year end 2009 had 16.8 million ounces of proven and probable gold reserves. Production in 2009 was 716,000 ounces of gold at total cash costs of $545 per ounce.