Old and New (II)

Looking at a pond associated with the modern gold-mining operation while standing on the ruins of the old mill. I suspect, given the plastic lining, that this pond receives the so-called "pregnant" (i.e., gold-bearing) solution from the heap leach, but it's called a "tailings" pond on the USGS topo map.
Aurora, Mineral County, Nevada, USA. For a description of the camp see adjacent photo.