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Safety Factors in Construction and Ventilation, Wawona Vehicular Tunnel, Yosemite National Park, California
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.
System:
The UNT Digital Library
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
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.
System:
The UNT Digital Library