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Mineral Industries Survey of the United States, California: Tuolumne and Mariposa Counties, Mother Lode District (South). Mines of the Southern Mother Lode Region, Part 2 -- Tuolumne and Mariposa Counties

Description: Report issued by the Bureau of Mines over mining operations in the southern Mother Lode Region of California. A review of this area is presented, and discussed. This report includes tables, illustrations, and photographs.
Date: 1940
Creator: Julihn, C. E. & Horton, F. W.
Item Type: Refine your search to only Report
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Safety Factors in Construction and Ventilation, Wawona Vehicular Tunnel, Yosemite National Park, California

Description: Report issued by the Bureau of Mines discussing the safety and ventilation hazards presented during the construction of the Wawona tunnel in Yosemite National Park. Safety precautions and procedures used during the construction are presented. This report includes tables, illustrations, and photographs.
Date: 1940
Creator: Ash, S. H.
Item Type: Refine your search to only Report
open access

Mining Practices and Safety at the Lava Cap Gold Mining Corporation Mines, Nevada City-Grass Valley District, California

Description: Report issued by the Bureau of Mines discussing mining safety in the Grass Valley mining district. As stated in the introduction, "the purpose of this paper is not to present an outstanding safety record but to show that gold mining can be pursued with the same degree of safety and improvement as any other industry, if and when the management recognizes that it can and must be done" (p. 1). This report includes tables, maps, illustrations, and photographs.
Date: 1941
Creator: Ash, S. H.
Item Type: Refine your search to only Report
open access

Diatomites of the Pacific Northwest as Filter-Aids

Description: From Introduction Purpose of Investigation: "To determine some of the physical and chemical properties of known Pacific Northwest diatomites, the present investigation was started in 1938 by the Bureau of Mines in cooperation with the College of Mines, University of Washington.
Date: 1944
Creator: Skinner, Kenneth G.; Dammann, Arthur A.; Swift, Roy E.; Eyerly, George B. & Shuck, Gordon R., Jr.
Item Type: Refine your search to only Report
open access

Survey of Tin in California

Description: Report issued by the U.S. Bureau of Mines on a survey of tin deposits in California. A focus on tin deposits in Kern and San Bernardino Counties are presented. The report includes two maps.
Date: April 1946
Creator: Bedford, Robert H. & Johnson, F. T.
Item Type: Refine your search to only Report
open access

Safety Practices in Dredging and Hydraulic Mining

Description: From Scope of Report: "This paper is based upon the observations made and the records received while dredging and hydraulic-mining operations were visited in Alaska during 1946 and in California during 1946 and 1947. Data from 30 active dredging operations and 34 active hydraulic operations are incorporated in this paper."
Date: 1948
Creator: Fatzinger, R. W.
Item Type: Refine your search to only Report
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