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Safe Mechanical Equipment for Use in Shaft Sinking

Sinking a Large-Diameter Concrete-Lined Access Shaft: Harold D. Roberts Tunnel, Colorado

Published Year

• 1920-1929 (1)
• 1960-1969 (1)

Subject

• Shaft sinking. (2) *
• Tunnels -- Colorado. (1)
• Water diversion -- Colorado. (1)
• Water-supply engineering -- Colorado. (1)

Author

• Bolmer, R. L. (1)
• Kudlich, R. H. (1)

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