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Sinking Methods and Costs for a Small Vertical Shaft with Steel Supports Keystone Mine, Crested Butte, Colo by Bolmer, R. L
Price:
$49.95
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Book description: United States Department of the Interior (Bureau of Mines). 1962. Paperback, Good, 8" x 10 1/4", 25 pages, Prior owner markings, illustrations listed as 19 figures made of of maps, plan and section of keystone mine, plan of underground sinking plant, shaft section, details of Riddell shaft mucker and more, and 5 tables, This information circular, which describes the methods and costs of sinking a small underground shaft with steel supports at the keystone mine of American Smelting and Refining Co. , near Crested Butte, Colo. ..., 15-1 .
- Bookseller: Watafindbooks
 (US)
- Bookseller Inventory #: 840785970
- Quantity available: 1
- Binding: Paperback
- Publisher: United States Department of the Interior (Bureau of Mines)
- Date published: 1962
- Subjects:
SCIENCE / Earth Sciences / Geology;
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