The St Louis Mine background:
An underground copper mine consisting of two shafts located near Laurium, MI. The St. Louis Copper Company was organized in 1864 to explore an area first worked by the New York and Michigan Mining Company in 1844. The St. Louis worked a conglomerate of the same name between 1865 and 1879. Beginning in 1880, the mine was worked by tributors on and off until 1898 when Calumet and Hecla bought the property. The last company report in 1911 details a shaft that was sunk on an amygdaloid that crossed the property. It is believed the mine ceased operations shortly after this time. The rock piles from the mine can be easily accessed off a dirt road. Minerals that can be found include copper, quartz, and agates.
The St Louis Mine cache is located off Snowmobile Trail #3, just north of Gas Plant Rd. Take the First or Second two track north of Gas Plant Rd on the west side of the trail. Follow the two track up to the mine foundations and poor rock piles. Cache is located in a foundation. Cache can also be accessed from St Louis Mine Rd (aka Dump Rd on some maps). Follow the road to the end where it turns into a two track. Cache is in an old building foundation.