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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |