Note on driving of tunnel 4650 ft long to provide outlet for sublevel ore in Utah Copper mine at Bingham Canyon, Utah; concrete lining was placed for 3784 ft; remaining 866 ft lined with timber, as it will be dug out as mining operations progress.
Utah Copper company's new 6040 railroad tunnel
Min Congress J
Mining Congress Journal ; 31 , n 9
1945
2 pages
Article (Journal)
English
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