A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Methods and costs of sinking A 2 1/2-compartment shaft at Hope mine, Clark Fork, Idaho
Purpose of shaft is to explore Pearl vein for ore shoots below alluvium cover; it will also be used to explore Hope mine at depth; until recently, mine was producing lead, silver and zinc from small but persistent bedding plane vein.
Methods and costs of sinking A 2 1/2-compartment shaft at Hope mine, Clark Fork, Idaho
Purpose of shaft is to explore Pearl vein for ore shoots below alluvium cover; it will also be used to explore Hope mine at depth; until recently, mine was producing lead, silver and zinc from small but persistent bedding plane vein.
Methods and costs of sinking A 2 1/2-compartment shaft at Hope mine, Clark Fork, Idaho
U S Bur Mines -- Information Cir
Hundhausen, R.J. (author)
1948
13 pages
Supp plates
Report
English
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