USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · San Benito County
Bitter Water
Unconfirmed Mercury Mixed Underground / Surface 4 mapped adits
Key facts
- State
- California
- County
- San Benito
- Mining district
- Central San Benito
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Mercury
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Hg occurrence/mine located in the center NE¼ sec. 25, T15S, R9E, MDM, 2.0 km (1.2 miles; 6,300 feet) SW of Llanada. Owned by H. V. Underwood. Produced during the period 1932 to 1938. MRDS database stated accuracy for this location is 100 meter…
Additional documented workings
-
Adit
— documented in 2 source records.
USGS Historical Topographic Mine Features
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 4 adit symbols
- Adit : Llanada , 1969
- Adit : Llanada , 1969
View individual source records (4)
Every underlying record used to build the summary above, for research/verification use.
-
Adit
Mapped on historical USGS topographic data (Adit). Historical map features may no longer exist in the field. -
Adit
Mapped on historical USGS topographic data (Adit). Historical map features may no longer exist in the field.
- USGS MRDS working type: Surface/Underground
- MRDS work_type documents underground workings: Surface/Underground · work_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
- H. V. Underwood · Source-reported owner
Commodities & minerals
Reported minerals
- Cinnabar
- Cinnabar
- commodity:Mercury
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 (4)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 87767
Supports:
- locality identity
- reported minerals (2)
A Mindat locality match does not by itself establish underground workings.
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