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California · El Dorado County

Costa Ranch

Unconfirmed Copper Mixed Underground / Surface

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Key facts

State
California
County
El Dorado
Development status
Past Producer
Mine type
Mixed underground / surface
Primary commodity
Copper
Verification
Unconfirmed

Mine Location

Approximate Area

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Documented underground workings

Mindat locality description

A former Cu occurrence/mine located in sec. 12, T11N, R8E, MDM, 2.3 km (1.4 miles) SW of Pilot Hill (town), on the N side of Pilot Hill (summit), on private land. Operated by F. J. Costa, Jr. MRDS database stated accuracy for this location is 1,000 met…

View full locality record on Mindat

View individual source records (2)

Every underlying record used to build the summary above, for research/verification use.

  • 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.

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Why it's listed

Source records document both underground and surface mining.

View sources & evidence

History & operations

Historical record

  • Development status: Past Producer

Operators / organizations

  • F. J. Costa, Jr. · Historical operator

Commodities & minerals

Reported minerals

  • Chalcopyrite
  • Malachite
  • Pyrite
  • Chalcopyrite
  • Malachite
  • Pyrite

Access & recent conditions

Land
unknown

Community reports

No community field reports yet.

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Sources & evidence

USGS Mineral Resources Data System

Type: Historical mine record

Supports:

  • mine identity
  • development status
  • commodities
  • underground eligibility evidence

Mindat

Type: Mineralogical locality database

Record: Mindat Locality: 77463

Supports:

  • locality identity
  • reported minerals (3)

A Mindat locality match does not by itself establish underground workings.

View on Mindat

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