All site activities were shut down in 1982 and the property was sold to Don Tibbals, a Lyon County commissioner.

[1][3][4] The Anaconda mine operated for 25 years and produced approximately 360 million tons of material from the pit.

Copper oxide ore (from the upper portion of the pit) was processed by heap leaching, either directly with sulfuric acid in vats to produce a copper solution precipitated by passing it over scrap iron, or by leaching successively in acid and kerosene solutions, subsequently electroplating onto stainless steel sheets.

Copper sulfide ore from the lower portion of the pit was processed by crushing, and flotation with calcium oxide added to the solution to maintain an alkaline pH.

[7] In 2013, Yerington residents were awarded up to a $19.5 million in settlement of a 2011 class action case that accused ARCO and BP America of leaking uranium, arsenic and other pollutants into soil and ground water for decades and of covering up the extent of the contamination.

Paleodepths from 0 to 8 km outcrop from the Pine Nut Mountains in the west to the northern Wassuk Range in the east.