Unknown

Unknown is a past producer of mercury, gold, silver, arsenic in Tooele County, Utah, in USGS's large output class. USGS records production from 1872 to 1907. It is one of 252 historic gold producers USGS lists in Tooele County, and number 2 when they are sorted by output class.

Facts

USGS status
Past producer
Output class
large (USGS class)
Commodities
Mercury, Gold, Silver, Arsenic, Iron, Antimony
Production years
1872 to 1907
County
Tooele County
State
Utah
Land status (BLM data)
Private land or land not mapped as public
USGS record
10012696

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. "Output class" is a code whose meaning changed over the years, so compare sites inside this data and do not read it as tonnage.

Land status comes from the BLM Surface Management Agency dataset and can be out of date. Check ownership before you go near any mine site.

Gold sites nearby

122 other USGS gold sites within 12 miles. The Tooele County page lists the biggest.