Eighty-Five Mine

Eighty-Five Mine is a past producer of copper, gold, silver, lead in Hidalgo County, New Mexico, in USGS's large output class. USGS gives a discovery year of 1885. It is one of 75 historic gold producers USGS lists in Hidalgo County, and number 7 when they are sorted by output class.

Facts

USGS status
Past producer
Output class
large (USGS class)
Commodities
Copper, Gold, Silver, Lead, Zinc
Workings
Underground
Production years
to 1973
Discovered
1885
County
Hidalgo County
State
New Mexico
Land status (BLM data)
Private land or land not mapped as public
USGS record
10010005

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Land status comes from the BLM Surface Management Agency dataset and can be out of date.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

38 other USGS gold sites within 12 miles. The Hidalgo County page lists the biggest.