Argo Gold Mine and Mill Wikipedia
The Argo Gold Mine and Mill is a former mining and milling property consisting of a gold mine and gold mill in Ido Springs, Colorado, built at the entrance of the Argo tunnel was built between 1893 and 1910 to drain the gold mines in ia Canyon, Gilpin Gulch, Russell Gulch, Quartz Hill, Nevadaville, and Central City and allow easier ore removal.