USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Inyo County
Keystone
Unconfirmed Gold Underground
Key facts
- State
- California
- County
- Inyo
- Development status
- Plant
- Mine type
- Underground
- Primary commodity
- Gold
- Verification
- Unconfirmed
- California DMR status
- ABANDONED
- Reclamation status
- RECLAMATION NOT STARTED
- DMR report year
- 2011
Mine Location
Approximate AreaDocumented underground workings
Source classification: Underground operation documented
Specific physical workings are not yet documented in discrete records.
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 7 adit symbols
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- Derived from MRDS oper_type (existing operation): Underground
- MRDS oper_type documents existing underground operation (dev_stat=Plant): Underground · oper_type
Verification
Unconfirmed
Source records support underground workings, but UndergroundMines has not yet independently verified this mine.
Why it's listed
USGS source data documents underground workings for this record.
History & operations
California state reporting
- Operator: KEYSTONE MINING COMPANY
- Report year: 2011
Historical record
- Development status: Plant
Operators / organizations
- Keystone Mining Co. · Historical operator · 1989
Commodities & minerals
Access & recent conditions
- Land
- unknown
Community reports
No community field reports yet.
I Visited This MineSources & evidence
USGS Historical Topographic Mine Features
Type: Historical mapped physical features
Dataset: DOI 10.5066/P9TAALR6
Supports:
- mapped adit symbols (7)
Historical mapped features may no longer exist.
California DMR Mines Online
Type: California state mining record
Record: 91-14-0005
Supports:
- operation status
- reclamation information
- reporting year
- operation type
A DMR match does not by itself prove underground workings.
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Keystone Gold Mine #2
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Historical mapped workings available