Facts
- MSHA status
- Non-producing since Aug 22, 2025
- Type
- Underground
- County
- Amador County
- State
- California
- Land status (BLM data)
- Land status not determined in the BLM dataset
- Nearest town
- Amador City
- Employees reported
- 3
- Operator
- Seduli Sutter Operations Corporation
- Coordinates
- 38.4114, -120.8169
- MSHA mine ID
- 0405038
Source: MSHA Mines data set, retrieved 2026-10-13. Status and counts can lag real operations.
Land status comes from the BLM Surface Management Agency dataset and can be out of date.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.
History and geology (USGS)
- USGS site name
- South Keystone
- USGS status
- Past producer
- Commodities
- Gold
- Output size
- small (USGS class)
Matched by location to the USGS Mineral Resources Data System record 10076472 (retrieved 2026-10-13). The database was last updated around 2011, so history may be out of date.
Gold mines nearby
- Big Seam mine 42 mi · active
- Red Ledge Mine 66 mi · intermittent
- MT. Gaines Mine 71 mi · active
- Sixteen To One Mine 73 mi · non-producing
- Ruby Mine 76 mi · active
- Spring Valley Mine 85 mi · active