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Job Description:

  • 1) Operates drilling unit, mounted on truck or crawler track, to drill holes for concrete pier and footing foundations: Raises and lowers boom to specified angle for drilling.

  • 2) Swings boom, controls hoist drums, raises and lowers drill, hoists drill bit, bell reamer, casing, and reinforcement steel into position, and controls rotary table that drives drill into earth.

  • 3) Observes drill stem during drilling operation and increases or decreases brake pressure on drill stem hoist drum to prevent swaying motion.

  • 4) Raises drill stem and swings boom to discharge dirt from drill bit or bell reamer.

  • 5) Observes type of earth formation penetrated to determine need for lowering casing into hole to seal off water and prevent cave-in of soft formations.




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End Of Job Description for: "FOUNDATION-DRILL OPERATOR"
DOT:   859.682-014

Job Number: 4247