Caselton is located across the mountain range from Pioche.
The new Combined Metals Reduction CMR mill in Caselton was completed in 1940, just in time for WWII. The new mill not only treated ores from the Caselton Shaft, but those from the CMR's No. 1 Shaft in Pioche. The CMR mill was connected at the 1200-foot level with a shaft driven at Caselton. The ore, miners, and materials was then hauled underground through an 8,000-foot long tunnel to the Caselton mill.
The production from these operations totaled about $73 million, an output that exceeded the famous production in the 1870's. The CMR mill at Caselton ceased operations in 1978. The mill is located on private property, and permission is required to explore the site and mill.