Safety: Historic mine sites can be hazardous. Never enter abandoned workings without qualified supervision. Read full notice
UndergroundMines
Search Sign in Join Free

Arizona · Mohave County

Portland Mine

Unconfirmed Gold Mixed Underground / Surface 3 mapped shafts 3 mapped adits

Save Mine I Visited Verify Flag Add to Trip

Key facts

State
Arizona
County
Mohave
Development status
Producer
Mine type
Mixed underground / surface
Primary commodity
Gold
Verification
Unconfirmed

Mine Location

Approximate Area

Open in Mine Map

Documented underground workings

Mindat locality description

‡Ref.: Conrad, J.E., et al (1990), Mineral Resources of the Black Mountains North and Burns Spring Wilderness Study Areas, Mohave County, Arizona, USGS Bull. 1737-C: C2; AZ Dept. Min. Resources - Portland Mine files; US Bur. Mines file data cluster NO …

View full locality record on Mindat

Additional documented workings

  • Adit — documented in 3 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.

  • 3 shaft symbols
  • 3 adit symbols
  • Adit : Spirit Mtn. NE , 1959
  • Adit : Spirit Mtn. NE , 1959
  • Shaft : Spirit Mtn. NE , 1959
  • Adit : Spirit Mtn. NE , 1959
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.
  • 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: 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.

Verify Mine Flag Mine

Why it's listed

Source records document both underground and surface mining.

View sources & evidence

History & operations

Historical record

  • Development status: Producer

Commodities & minerals

Reported minerals

  • Quartz
  • Calcite
  • Laumontite
  • Native Gold

Access & recent conditions

Land
unknown

Community reports

No community field reports yet.

I Visited This Mine

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 (3)
  • mapped adit symbols (3)

Historical mapped features may no longer exist.

Dataset information

Mindat

Type: Mineralogical locality database

Record: Mindat Locality: 56358

Supports:

  • locality identity
  • reported minerals (3)

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

View on Mindat

Related underground mines

African Prospect

Arizona · Mohave County

Unconfirmed Gold Occurrence Underground

Historical mapped workings available

Alcyone Prospect

Arizona · Mohave County

Unconfirmed Gold Occurrence Underground

Historical mapped workings available

Alexander Group

Arizona · Mohave County

Unconfirmed Gold Past Producer

Historical mapped workings available

Antelope

Arizona · Mohave County

Unconfirmed Gold Past Producer

Documented shaft evidence