Historic gold producers in Cook County (USGS)
USGS records 1 historic gold producer in Cook County: 0 past producers and 1 listed as a producer or plant.
Show the 1 sites
| Site | USGS status | Output | Commodities | Years |
|---|---|---|---|---|
| (Facility) Simmons Precious Metals Refinery | Plant | n/a | Ruthenium, Gold, Iridium, Palladium, Platinum, Silver, Gallium | n/a |
Source: USGS Mineral Resources Data System (retrieved 2026-10-13). The database was last updated around 2011, positions can be approximate and "producer" does not mean a mine is operating today. Sites already matched to an MSHA record are shown in the MSHA tables.