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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


Blue Print- Calumet and Hecla Electric Power Plant

Engineering, Historic Sites, Historic Mines, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining Calumet and Hecla Mining Company Electric Power Plant at Stamp Mills. Tunnel Details.

Scanned: June 8, 2012


Blue Print- Calumet and Hecla Electric Power Plant

Engineering, Historic Sites, Historic Mines, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining Calumet and Hecla Mining Company Electric Power Plant at Stamp Mills; Engine House Details in Various Scales.

Scanned: June 8, 2012


Blue Print- Calumet and Hecla Electric Power Plant

Engineering, Historic Sites, Historic Mines, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining Calumet and Hecla Mining Company Electric Power Plant at Stamp Mills; Basement drains.

Scanned: June 8, 2012


Blue Print- Calumet and Hecla Electric Power Plant

Engineering, Historic Sites, Historic Mines, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining Calumet and Hecla Mining Company Electric Power Plant at Stamp Mills; arrangement of piping.

Scanned: June 8, 2012


Blue Print- Calumet and Hecla Electric Power Plant

Engineering, Historic Sites, Historic Mines, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining Calumet and Hecla Mining Company Electric Power Plant at Stamp Mills; General elevations of engine house.

Scanned: June 8, 2012


Calumet and Hecla - Machine Location Plan

Natural Resources, Mines and Mineral Resources, Copper Mines and Mining, Buildings, Engineering Calumet and Hecla Consolidated Copper Company. Mechanical equipment - pump house and old boiler house. Ahmeek Mill in Hubbell, Michigan. Drawings made by Stone and Webster Engineering Corporation.

Scanned: August 12, 2014


Calumet & Hecla Mining Company - Hecla Sand Wheel House Drawings

Engineering, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining, Calumet & Hecla Mining Company - Hecla Sand Wheel House Elevations and Plan.

Scanned: September 9, 2014


Calumet & Hecla Mining Company - Hecla Mill Extension Drawings

Engineering, Natural Resources, Mines and Mineral Resources, Copper Mines and Mining, Calumet & Hecla Mining Company Hecla Mill Extension. Shows sections of Mill and Annex.

Scanned: September 9, 2014