USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Nevada County
Red Ledge Mine
Unconfirmed Chromium Mixed Underground / Surface
Key facts
- State
- California
- County
- Nevada
- Mining district
- Washington
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Chromium
- Verification
- Unconfirmed
- California DMR status
- IDLE
- DMR report year
- 2025
Also known as
- Laims, Red Ledge & Red Ledge Extension C
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Au-Cr-Fe mine located in sec. 12 & in the NW¼NE¼ sec. 13, T17N, R10E, MDM, about 2 miles SW of Washington on National Forest land. The MRDS database stated accuracy for this location is 10 metres. Note: not to be confused with the Red Ledge…
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 1 adit symbol
View individual source records (3)
Every underlying record used to build the summary above, for research/verification use.
- USGS MRDS working type: Underground
- MRDS work_type documents underground workings: Surface, Underground · work_type
- MRDS oper_type documents existing underground operation (dev_stat=Past Producer): Surface-Underground · oper_type
Verification
Unconfirmed
Source records support underground workings, but UndergroundMines has not yet independently verified this mine.
Why it's listed
Source records document both underground and surface mining.
History & operations
Historical record
- Development status: Past Producer
Operators / organizations
- Last Operator 1919,Tb,Rf And Jm Williamson And Cm Cole · Historical operator · 1976
- U.S. Forest Service - Tahoe National Forest · Source-reported owner · 1976
Commodities & minerals
Reported minerals
- Ankerite
- Arsenopyrite
- Calcite
- Chlorite
- Chlorite Group
- Chromite
- Chromium-bearing Clinochlore
- Clinochlore
View all 28 reported minerals
- Ankerite
- Arsenopyrite
- Calcite
- Chlorite
- Chlorite Group
- Chromite
- Chromium-bearing Clinochlore
- Clinochlore
- commodity:Chromium
- commodity:Gold
- commodity:Iron
- Galena
- Knorringite
- Magnesiochromite
- Mariposite
- Muscovite
- Native Copper
- Native Gold
- Phengite
- Pyrite
- Quartz
- Redledgeite
- Rutile
- Serpentine
- Serpentine Subgroup
- Stibnite
- Talc
- Uvarovite
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 (1)
Historical mapped features may no longer exist.
California DMR Mines Online
Type: California state mining record
Record: 91-29-0020
Supports:
- operation status
- reporting year
A DMR match does not by itself prove underground workings.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 3515
Supports:
- locality identity
- reported minerals (26)
A Mindat locality match does not by itself establish underground workings.
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Documented adit evidence