Mining Project

Safford Leach Pad Phase II

Freeport-McMoran Inc.
December, 2012
Construction of 14 million square foot leach pad. This includes 325 acres of clearing & grubbing, furnish & install SWPPP, 2.1 million cubic yards of excavation and embankment, strip & develop clay borrow source for secondary liner. Load, haul, process, and place 530,000 cubic yards of clay for secondary liner. Install primary liner system consisting of geotextile fabric, 60 & 80 mil HDPE liners. Install 4”, 12”, 16”, 20” & 24” leachate collection piping. Also includes crushing run of mine material to make 995,000 cubic yards of fine overliner material, installing 995,000 cubic yards of overliner material, and installing 995,000 cubic yards of run of mine cover material on top of the overliner material.