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Search U.S. government technical reports digitized or harvested by TRAIL.
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4 results returnedHydraulic tunneling in St. Peter sandstone at Minneapolis, Minn.
Carbide insert bit drilling at the Cleveland-Cliffs Iron Co. mines, Ishpeming, Mich.
Tunnel construction by peripheral sawing at the Fort Randall Reservoir, Pickstown, S. Dak.
Published Year
Subject
- Iron mines and mining--Michigan (2)
- Carbide cutting tools (1)
- Drilling and boring machinery (1)
- Earth dams--South Dakota--Design and construction (1)
- Hydraulic engineering (1)
- Mine ventilation (1)
- Sawing (1)
- Tunneling--Minnesota (1)
- Tunneling--South Dakota (1)
- Tunneling--South Dakota--Equipment and supplies (1)
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