USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Arizona · Pinal County
Magma Chief Group
Unconfirmed Lead Underground
Key facts
- State
- Arizona
- County
- Pinal
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Lead
- Verification
- Unconfirmed
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.
- 9 shaft symbols
- 17 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=Past Producer): 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
Historical record
- Development status: Past Producer
Commodities & minerals
Access & recent conditions
- Land
- private property
- Source
- Industrial/private mine complex status + USGS MRDS
- Access information last checked
- August 9, 2026
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 shaft symbols (9)
- mapped adit symbols (17)
Historical mapped features may no longer exist.
Industrial/private mine complex status + USGS MRDS
Type: Access / land-management source
Supports:
- access / lawful visit information
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Documented shaft evidence
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Documented adit evidence
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Documented shaft evidence
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Historical mapped workings available