Altaville
California
Unconfirmed Gold
Documented shaft evidence
Platinum underground mines
Catalog records where USGS source data lists Platinum among mined commodities. Reported minerals on a mine page are tracked separately and are not the same as commodities.
- Underground mine records
- 31
- Independently verified
- 0
Representative records
Azurite Mine
Nevada
Unconfirmed Zinc
Historical mapped workings available
Bonanza Claim
California
Unconfirmed Chromium
Historical mapped workings available
Boss Mine
Nevada
Unconfirmed Copper
Historical mapped workings available
Boss Mine
Nevada
Unconfirmed Gold
Historical mapped workings available
Cherokee Mine
California
Unconfirmed Gold
Documented shaft evidence
Coon Creek
California
Unconfirmed Gold
Devils Gulch
California
Unconfirmed Gold
Douglas Flat
California
Unconfirmed Gold
Documented adit evidence
Estrella Mine
California
Unconfirmed Chromium
Fourth of July Claim
California
Unconfirmed Gold
Historical mapped workings available
French Hill Chrome Mine
California
Unconfirmed Chromium
Gibellini Manganese Mine
Nevada
Unconfirmed Manganese
Documented adit evidence
Golden Chariot Mine
Nevada
Unconfirmed Gold
Historical mapped workings available
Grey Claim
California
Unconfirmed Chromium
Holston Mine
California
Unconfirmed Chromium
Judy Mine
California
Unconfirmed Chromium
Documented shaft evidence
Key West
Nevada
Unconfirmed Nickel
Documented shaft evidence
Long Ledge No. 3
California
Unconfirmed Chromium
Mann and Ross Mine
California
Unconfirmed Gold
Manzanita Mine
California
Unconfirmed Gold
Mendocino Mining & Milling Co. Inc.
California
Unconfirmed Gold
Moore Mine
California
Unconfirmed Chromium
Documented adit evidence
Oriental
California
Unconfirmed Gold
Documented adit evidence
Orleans Placer
California
Unconfirmed Gold
Oro Amigo Mine
Nevada
Unconfirmed Copper
Documented shaft/adit evidence
Peg Leg Mine
California
Unconfirmed Chromium
Documented adit evidence
Plomosa Placers
Arizona
Unconfirmed Gold
Historical mapped workings available
Seiad Creek
California
Unconfirmed Chromium
Documented adit evidence
Sweetwater Mine
California
Unconfirmed Chromium
Historical mapped workings available
Valdor Dredge
California
Unconfirmed Gold