Apr 28, 2016 - Savona Equipment is a lead supplier of placer mining equipment including gold wash plants, derockers, sluice boxes, and trommels. Our Placer mining equipment is used for the mining of alluvial deposits of minerals. This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunneling equipment. Manufacturing Placer Mining Equipment Since 2009. Macon Industries has seen substantial growth in manufacturing Placer Mining Equipment. Working alongside industry experts, we have designed a complete line of gold wash plants. With so many different types of ground and production levels, we can provide a machine for every scenario.