USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Riverside County
Hemet Silica Mine
Unconfirmed Silica Mixed Underground / Surface 2 mapped adits
Key facts
- State
- California
- County
- Riverside
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Silica
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former silica occurrence/mine located in the SW¼SW¼NW¼ sec. 26, T5S, R1W, SBM, 0.1 km (0.1 mile) WSW of Hemet Butte, on the western slope of the butte, and 4.4 km (2.7 miles) SSE of Hemet. MRDS database stated accuracy for this location is 100 meters…
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.
- 2 adit symbols
- Adit : Hemet , 1953
- Adit : Hemet , 1957
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.
- Derived from MRDS oper_type (existing operation): Surface-Underground
- 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
Commodities & minerals
Reported minerals
- commodity:Silica
- Silica
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 (2)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 87015
Supports:
- locality identity
- reported minerals (2)
A Mindat locality match does not by itself establish underground workings.
Related underground mines
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Documented adit evidence