Records
38
Napa County Underground Mines
California · 38 underground-eligible records
Verified
0
Unconfirmed
38
With photos
0
Major commodities
- Mercury · 15
- Chromium · 13
- Magnesite · 3
- Silver · 2
- Copper · 2
- Gold · 1
- Manganese · 1
- Asbestos · 1
Working types (source)
- Other / unspecified · 23
- Underground · 8
- Mixed Underground/Surface · 7
Related mining districts
- East Mayacmas · 20
Mines in this county
Graves Mine
California
Unconfirmed Chromium Mixed Underground/Surface
Grey Claim
California
Unconfirmed Chromium Mixed Underground/Surface
Hightower Claim
California
Unconfirmed Chromium Mixed Underground/Surface
Historical mapped workings available
Maltby No 2 Mine
California
Unconfirmed Magnesite Mixed Underground/Surface
Manhatten Mine
California
Unconfirmed Mercury Mixed Underground/Surface
Historical mapped workings available
Moore Creek Prospect
California
Unconfirmed Manganese Mixed Underground/Surface
Napa Copper Claim
California
Unconfirmed Copper Mixed Underground/Surface
Nichelini Mine
California
Unconfirmed Chromium Mixed Underground/Surface
Palisade Mine
California
Unconfirmed Silver Mixed Underground/Surface
Documented shaft/adit evidence
Silverado Mine
California
Unconfirmed Silver Mixed Underground/Surface
Silverado-Palisade Deposit
California
Unconfirmed Gold Mixed Underground/Surface
Documented adit evidence
Tarry Claim
California
Unconfirmed Chromium Mixed Underground/Surface
Turner Mine
California
Unconfirmed Chromium Mixed Underground/Surface
Historical mapped workings available
White Rock Mine
California
Unconfirmed Magnesite Mixed Underground/Surface
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