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Bob Enzenroth repairing and overhauling a jackhammer. All rock drills not working properly were sent to the machine shop to be cleaned, repaired and returned to the mine for service.

Emmet Flaherty preparing to pre-heat two blank pieces of hollow drill steel. In the background is an automatic oil-fired forge which will bring these blanks to an exact temperature for forging. From the hollow drill blanks, finished pieces of lugged steel are formed for use in rock drills.