A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Leadville drainage tunnel
Descriptive news item referring to signing of government contract for driving of 17,300-ft drainage tunnel to unwater vast flooded metal resources in Leadville, Colorado, zinc lead area; tunnel will be built and owned by U S Bureau of Mines; it will make recoverable estimated 3,000,000 tons of zinc and lead ores and 1,000,000 tons of manganese ores now underwater. Compare paper indexed in Engineering Index 1943 p 688, from Eng and Min J Sept 1943.
Leadville drainage tunnel
Descriptive news item referring to signing of government contract for driving of 17,300-ft drainage tunnel to unwater vast flooded metal resources in Leadville, Colorado, zinc lead area; tunnel will be built and owned by U S Bureau of Mines; it will make recoverable estimated 3,000,000 tons of zinc and lead ores and 1,000,000 tons of manganese ores now underwater. Compare paper indexed in Engineering Index 1943 p 688, from Eng and Min J Sept 1943.
Leadville drainage tunnel
Mines Mag
Mines Magazine ; 33
1943
Article (Journal)
English
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