Mine detail: Calvert,Frontier,And Treganza

Previously called 'Calvert MineFrontier MineTreganza Mine'

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Location

Lat / long:

42.57311, -90.39261

Resource(M)

Tertiary:	Zinc
Discovery year:	1905

Production

Operation type:	Underground
Development status:	Past Producer
First production started:	1909

Geology

References

MAS	550650157
DEP	10156386
Reporter	Eastern Field Operations Center (EFOC)