Sierra Madre Gold and Silver Ltd. is pleased to provide an in-depth update of its activities at the 100% owned past-producing La Guitarra Silver-Gold Mine Complex in Estado de Mexico, Mexico, 130 km southwest of Mexico City. Mine Restart Study The Company has retained TechSer Mining Consultants Ltd., of Vancouver, B.C., to complete the Mine Restart Study . This work will include an estimation of underground mine material for the Guitarra, Coloso and Nazareno mines and the Los Angeles bulk tonnage deposit. Additional evaluations will include an operating cost estimate covering the mine and recovery plant, based on reagent and consumable usage, energy, and diesel consumption, from the 2013 to 2018 operating period which will be updated for current pricing. Labour, staff and man...