Underground Mine Records
11903
Underground Mine Records
A research catalog of documented underground mines across California, Nevada, and Arizona — organized for discovery, not trip routing.
Independently Confirmed
354
Awaiting Independent Verification
11033
Search
States
Browse by workings
- Underground · 3432 mines
- Mixed Underground / Surface · 1280 mines
- Other Underground · 7171 mines
- Mines with Documented Shafts · 1796 mines
- Mines with Documented Adits · 1895 mines
- Mines with Documented Tunnels · 59 mines
- Incline · 32 mines
Major commodities
Mining districts
Wallapai District
Arizona · 70 mines
Battle Mountain District
Nevada · 66 mines
Grass Valley
California · 63 mines
Harshaw District
Arizona · 56 mines
Patagonia
Arizona · 51 mines
Pioche District
Nevada · 46 mines
Needs verification
Unconfirmed means UndergroundMines has not independently verified the record. It does not mean the source lacks evidence.
Yuba Mine
California · Nevada County
Unconfirmed Gold Past Producer
Zeibright Mine
California · Nevada County
Unconfirmed Gold Past Producer
Documented adit evidence
McIlroy property
California · Inyo County
Unconfirmed Asbestos Past Producer Underground
Documented adit evidence
Oro Cruz (Tumco)
California · Imperial County
Unconfirmed Gold Past Producer
Historical mapped workings available
Copper Queen Mine
Arizona · Cochise County
Unconfirmed Copper Past Producer
Documented shaft evidence
Kennedy
California · Amador County
Unconfirmed Gold Past Producer Underground
Historical mapped workings available
Mexican Mine
Nevada · Storey County
Unconfirmed Gold Past Producer
Historical mapped workings available
New Almaden Mine
California · Santa Clara County
Unconfirmed Mercury Past Producer Mixed Underground/Surface
Historical mapped workings available