The Heavy Media mill was built in the early 1970's to process ore from the Annie L. Davis and Number 4 mines (on site) and surrounding mines. The mill was destroyed by arson in 1987.
While not extensive, the dumps contain fluorite, quartz, sphalerite, barite, calcite, galena, etc.
Reference: Eric Livingston (2004), in "Illinois - Kentucky Fluorspar District Friends of Mineralogy Symposium Guidebook", Alan Goldstein (editor), p. 21.
Mineral List:7 entries listed. 7 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!