In 2008, the Los Filos mine began operation of a new conveyor line from the mine crusher to the leach pads. The haulage path went down a mountainside to the leach pads that were built in the valley below. Rather than confronting the steep slope of the mountainside, an ore pass from the hilltop was connected with a tunnel from the toe of the hill; this also served to store the ore. A feeder at the bottom then metered the material onto the tunnel conveyor that led to a rotary agglomerating drum. The agglomerating drum mixed the ore with the agglomerate; the ore mix was then conveyed to a spreading system on the leach pads.