| Job Title |
Foundation-drill Operator |
| Job Description |
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. 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. Observes
Drill Stem During Drilling Operation And Increases Or Decreases
Brake Pressure On Drill Stem Hoist Drum To Prevent Swaying
Motion. Raises Drill Stem And Swings Boom To Discharge Dirt From
Drill Bit Or Bell Reamer. 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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