Mindanao MGB Regional Directors and some members of Mindanao Association of Mining Engineers, Inc. (MAEM, Inc.) conducts benchmarking visit to two (2) nickel mining operations (Taganito Mining Corporation, Claver, Surigao del Norte and San Roque Metals Inc., Tubay, Agusan del Norte) that passed the DENR audit on February 17 to 19, 2017.