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Calumet & Hecla Mining Company - Hecla Mill Drawings

Engineering, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining, Calumet & Hecla Mining Comany, Hecla Mill wash heads. Foundation walls and launders plan.

Scanned: September 9, 2014


Calumet & Hecla Mining Company - Plan & Evaluation of Machinery

Engineering, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining, Calumet & Hecla Mining Company Hecla Mill Heads No. 12 and No. 13, plan and elevation of machinery.

Scanned: September 9, 2014


Ahmeek Number Three and Four

Engineering, Buildings, Ahmeek Mining Company. Ahmeek number three and four dry. First flor plan and Details. Calumet and Hecla Drawing number 7869.

Scanned: March 31, 2014


Plans - North Kearsarge #4 Dry

Metal Trade, Copper Industry and Trade, Copper Mines and Mining, Buildings, Osceola Consolidated Mining Co. North Kearsarge #4 Dry. Plans and Elevations. [Floor plan for the dry house at North Kearsarge which includes the bill for materials used.]

Scanned: August 26, 2009


Quincy Regrinding Plant

Historic Sites, Historic Mines, Metal Trade, Copper Industry and Trade, Copper Mines and Mining, Buildings Map plans of the Quincy Regrinding Plant- Plan and Longitudinal Sections

Scanned: November 26, 2014


Calumet & Hecla Mining Company [Parking Garage?]

Geography, Maps, , Calumet & Hecla Mining Company [Parking Garage?]

Scanned: June 14, 2010


Calumet & Hecla Consolidated Copper Co. - Hecla Carpenter Shop & Lumber Shed Yard

Geography, Maps, , Calumet & Hecla Consolidated Copper Co. - Carpenter Shop & Lumber Shed Yard. Pond Water Mains - Additions

Scanned: June 14, 2010


Calumet & Hecla Mining Company Hecla Carpenter Shop

Geography, Maps, , Calumet & Hecla Mining Company Hecla Carpenter Shop Addition First Floor Plan

Scanned: June 14, 2010


Calumet & Hecla Mining Company Carpenter Shop Addition

Geography, Maps, , Calumet & Hecla Mining Company Carpenter Shop Addition

Scanned: June 14, 2010


Calumet & Hecla Mining Company Window Details

Geography, Maps, , Calumet & Hecla Mining Company Window Details

Scanned: June 14, 2010