Mine detail: Optimo No.4 Mine

Previously called 'Fearless'

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Location

Lat / long:

42.93311, -90.27731

Resource(M)

Tertiary:

Lead, Zinc

Production

Operation type:	Underground
Development status:	Past Producer
First production started:	1923

Geology

References

MAS	550490060
DEP	10278022
Reporter	Eastern Field Operations Center (EFOC)