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California · Trinity County

Island Mountain

Unconfirmed Copper Underground 1 mapped shaft 2 mapped adits

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Key facts

State
California
County
Trinity
Development status
Past Producer
Mine type
Underground
Primary commodity
Copper
Verification
Unconfirmed

Also known as

  • Dahrman Group

Mine Location

Approximate Area

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Documented underground workings

Mindat locality description

A populated place (town) along the Eel River.

View full locality record on Mindat

Additional documented workings

  • Adit — documented in 2 source records.
    USGS Historical Topographic Mine Features
  • Shaft — documented in 1 source record.
    USGS Historical Topographic Mine Features

Historical mapped workings

USGS historical topographic mapping. Features may no longer exist.

  • 1 shaft symbol
  • 2 adit symbols
  • Shaft : Lake Mountain , 1967
  • Adit : Lake Mountain , 1967
  • Adit : Lake Mountain , 1967
View individual source records (6)

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.
  • Shaft
    Mapped on historical USGS topographic data (Mine Shaft). Historical map features may no longer exist in the field.
  • USGS MRDS working type: Underground
  • MRDS work_type documents underground workings: Underground · work_type
  • 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.

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Why it's listed

USGS source data documents underground workings for this record.

View sources & evidence

History & operations

Historical record

  • Development status: Past Producer

Commodities & minerals

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

USGS Historical Topographic Mine Features

Type: Historical mapped physical features

Dataset: DOI 10.5066/P9TAALR6

Supports:

  • mapped shaft symbols (1)
  • mapped adit symbols (2)

Historical mapped features may no longer exist.

Dataset information

Mindat

Type: Mineralogical locality database

Record: Mindat Locality: 242206

Supports:

  • locality identity

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

View on Mindat

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