Great Western | UndergroundMines

Key facts

State: California
County: Lake
Mining district: East Mayacmas
Development status: Past Producer
Mine type: Mixed underground / surface
Primary commodity: Mercury
Verification: Unconfirmed

Also known as

Great Western Quicksilver Mine, Laguna Western

Mine Location

Approximate Area

Open in Mine Map

Documented underground workings

Source classification: Underground operation documented

Specific physical workings are not yet documented in discrete records.

View individual source records (3)

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
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.

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: Past Producer

Operators / organizations

Westfall Mining Co. · Historical operator
Bradley Mining Co. · Source-reported owner

Commodities & minerals

Reported minerals

Calcite
Dolomite
Opal
Pyrite
Quartz
Cinnabar

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

Related underground mines

Sulphur Bank Mine

California · Lake County

Unconfirmed Sulfur Past Producer Mixed Underground/Surface

Aetna

California · Napa County

Unconfirmed Mercury Past Producer Mixed Underground/Surface

Documented adit evidence

Aetna Extension